| 1. |
- Ibrahim, Mohammad, et al.
(författare)
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Gas-Atomized Nickel Silicide Powders Alloyed with Molybdenum, Cobalt, Titanium, Boron, and Vanadium for Additive Manufacturing
- 2023
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Ingår i: Metals. - : MDPI AG. - 2075-4701. ; 13:9
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Tidskriftsartikel (refereegranskat)abstract
- Nickel silicides (NiSi) are renowned for their ability to withstand high temperatures and resist oxidation and corrosion in challenging environments. As a result, these alloys have garnered interest for potential applications in turbine blades and underwater settings. However, their high brittleness is a constant obstacle that hinders their use in producing larger parts. A literature review has revealed that incorporating trace amounts of transition metals can enhance the ductility of silicides. Consequently, the present study aims to create NiSi-based powders with the addition of titanium (Ti), boron (B), cobalt (Co), molybdenum (Mo), and vanadium (V) for Additive Manufacturing (AM) through the process of gas atomization. The study comprehensively assesses the microstructure, phase composition, thermal properties, and surface morphology of the produced powder particles, specifically NiSi11.9Co3.4, NiSi10.15V4.85, NiSi11.2Mo1.8, and Ni-Si10.78Ti1.84B0.1. Commonly used analytical techniques (SEM, EDS, XRD, DSC, and laser diffraction) are used to identify the alloy configuration that offers optimal characteristics for AM applications. The results show spherical particles within the size range of 20–63 μm, and only isolated satellites were observed to exist in the produced powders, securing their smooth flow during AM processing.
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| 2. |
- Kidayi, Paulo L., et al.
(författare)
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"Caring for Breast Cancer Patients Is a Work That Brings Sorrow" : A Qualitative Interview Study with Nurses in Tanzania
- 2023
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Ingår i: Sage Open Nursing. - : Sage Publications. - 2377-9608. ; 9
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Tidskriftsartikel (refereegranskat)abstract
- IntroductionBreast cancer is increasing in sub-Saharan Africa (SSA), and most women are diagnosed at a late stage. This leads to increased suffering for the patients and challenging care situations for nurses. Limited resources in healthcare, lack of oncology training, and low health literacy in society result in even more demanding situations for nurses. ObjectiveThe objective was to explore nurses' experiences of caring women for with breast cancer in Tanzania. MethodsThe study employed a descriptive qualitative design. Fifteen nurses, working in oncology units in three major hospitals in Tanzania were interviewed using a semistructured interview guide. The participants had a minimum of 6 months experience of caring for breast cancer patients. Purposive sampling was used. Data were analyzed by qualitative content analysis. ResultsTwo main themes emerged: Challenges in caring for breast cancer patients and Nurses' psychological distress. The late diagnosis was very challenging for the nurses. Low health literacy regarding breast cancer disease and treatment, patients' financial difficulties, minimal oncology nursing education, and technology in healthcare systems were also major challenges. The nurses experienced psychological distress, lost hope, and faced ethical dilemmas while providing cancer care. ConclusionThe findings of this study conclude that nurses face emotional distress and ethical dilemmas while caring for patients with breast cancer. Late diagnosis, lack of infrastructure and resources, and low health literacy among patients, family, and healthcare providers have a great impact on the stress that the nurses experience.
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| 3. |
- Kidayi, Paulo L, et al.
(författare)
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Cross-Cultural Adaptation and Psychometric Properties of the Swahili Version of the European Organization for Research and Treatment of Cancer (EORTC) QLQ-BR45 among Breast Cancer Patients in Tanzania
- 2023
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Ingår i: Healthcare. - : MDPI. - 2227-9032. ; 11:18
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Tidskriftsartikel (refereegranskat)abstract
- Breast cancer is the most frequent cancer in women in Africa and contributes to premature death and poor quality of life. This study aimed to determine the validity, reliability, and psychometric properties of the Swahili version of EORTC QLQ-BR45 among women with breast cancer in Tanzania. A cross-sectional study design with non-probability convenience sampling was employed. Data were collected in two tertiary hospitals and one national cancer institute; 414 participants completed the EORTC-QLQ-C-30 and EORTC-QLQ-BR45. The reliability of QLQ-BR45 was measured using Cronbach's alpha and McDonald's Omega coefficients. The factor structure of EORTC QLQ-BR45 was assessed using confirmatory factor analysis. The internal consistencies for the five dimensions were all above 0.7 indicating satisfaction, except for systemic therapy side effects with a marginal value of 0.594 and significant correlations between the dimensions of QLQ-C30 and BR45. The final model fit well to the data, with the comparative fit index = 0.953, Tucker-Lewis index = 0.947, root mean square error of approximation = 0.041 (90% CI: 0.035, 0.046), and standardized root mean square residual = 0.072. In conclusion, the QLQ BR45 Swahili version displayed good reliability, validity, and psychometric properties and can be used in Swahili-speaking Sub-Saharan countries.
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| 4. |
- Kidayi, Paulo L, et al.
(författare)
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Quality of cancer care in Tanzania as experienced by patients : A qualitative study
- 2023
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Ingår i: Sage Open Nursing. - : SAGE Publications. - 2377-9608. ; 9
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Tidskriftsartikel (refereegranskat)abstract
- INTRODUCTION: Cancer is a disease of public importance in Tanzania. Considering a limited health care system with few cancer centers and low health literacy in general, people are diagnosed at late stage and face difficulties in accessing care for their cancer. All these challenges affect the caring situation for the nurses who meet the patients at the cancer care centers.OBJECTIVE: This study aimed to explore the journey of cancer care experienced by patients with cancer.Research questions:How do patients experience the quality of care at the cancer care centers?How do patients experience the family's and the community's role?METHODS: Semi-structured qualitative interviews were carried out with 15 patients treated for colorectal-, breast-, or prostate cancer in three cancer care centers in Tanzania. A purposive sampling was used. Qualitative content analysis according to Graneheim and Lundman was employed.RESULTS: Three main themes and six sub-themes emerged. The main themes were e xperiences of cancer care services, the role of the family, community challenges and cancer care. The sub-themes were communication, resource allocation at the cancer care centers, fmily's denial, family challenges, limitations of primary care and misconceptions, and accessibility of cancer service and the health care system. The findings show that patients experienced incapacitated health care facilities for cancer care, misconceptions in the community and challenges for the families.CONCLUSIONS: The quality of cancer care in Tanzania needs to be improved, patients face challenges in all levels of health care facilities, including families, and the community at large. The distance to oncology care, economic hardship, and lack of knowledge in the community including families, lead to late diagnosis and suffering for the patients. There is a great need for education regarding cancer within healthcare, as well as in the community, to change the situation for patients with cancer.
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| 5. |
- Mattsson, Janet, Docent, Ph.D, 1967-, et al.
(författare)
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Quality Of Life in Children With Home Mechanical Ventilation – A Scoping Review
- 2022
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Ingår i: Sage Open Nursing. - : Sage Publications. - 2377-9608. ; 8, s. 1-12
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Forskningsöversikt (refereegranskat)abstract
- Introduction: Home mechanical ventilation is an established method to support children suffering from chronic respiratory insufficiency, still more research is needed regarding mechanically ventilated children’s and adolescents’ quality of life (QoL). Therefore, the aim of this scoping review was to explore research regarding QoL and lived experience of children and adolescents with home mechanical ventilation. Methods: A scoping review with systematic searches for research studies published between year 2000–2020 was performed in Cinahl, Medline, and PubMed. Studies that met the inclusion criteria were quality assessed and a thematic analysis was performed.Results: In total, ten articles were quality assessed and included in the results. Four themes emerged: Children’s self-reported QoL, Parents’ perception and parent-proxy report, Differences between the child’s and parent’s perception, and challenges in daily life. Children with home mechanical ventilation reported a lower QoL than healthy children and children with other chronic diseases. Generally, parents rate their child’s QoL lower than the children themselves.Conclusion: This is the first literature review focusing on HMV in the paediatric population. It is clear that HMV does not only affect the treated child or adolescent but also the whole family. It is important to regularly measure and evaluate QoL in children and adolescents with
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| 6. |
- Tilliander, Ulrika, et al.
(författare)
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Kinetics studies of hydrogen reduction of Cu2O
- 2022
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Ingår i: International Journal of Materials Research - Zeitschrift für Metallkunde. - : WALTER DE GRUYTER GMBH. - 1862-5282 .- 2195-8556. ; 97:1, s. 72-78
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Tidskriftsartikel (refereegranskat)abstract
- In present work, reduction kinetics of Cu2O by hydrogen gas was studied by thermogravimetric analyses (TGA). The TGA experiments were carried out both isothermally and non-isothermally on shallow powder beds. It was established that additions of Ni or NiO did not have any serious effect on the kinetics of reduction of Cu2O. The composition and microstructures of the reaction products were analyzed after each experiment by X-ray diffraction (XRD) as well as by scanning electron microscopy (SEM). The activation energy for the reaction was evaluated from isothermal as well as non-isothermal reduction experiments and was found to be in good agreement. The impact of the stability of the oxide on the activation energy for hydrogen reduction is also discussed.
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