47 research outputs found
Experiences and attitudes of the LGBTQ+ community on care/nursing homes
Get PDFRecent research has found that older lesbian, gay, bisexual, transgender and queer (LGBTQ+) people have a negative attitude toward long term care services. To build upon this, we conducted a systematic review analyzing current research into the LGBTQ+ communities’ perspectives and experiences of care/nursing homes. Additionally, we sought to explore the attitudes of care/nursing home staff toward providing care for LGBTQ+ residents. To conduct this study, we used the databases Embase, Medline and Web of Science, which identified 19 articles for review. From this, we were able to draw several conclusions, including that LGBTQ+ participants were concerned that they would have to conceal their identity and experience abuse. Most staff had a positive attitude toward LGBTQ+ residents, but there were exceptions to this. Despite their positive attitude, staff often lacked awareness of LGBTQ+ issues. The results of this review suggest that care/nursing homes are not welcoming environments for sexual and gender minorities, and that staff require more training to support this community. We end with innovative suggestions to tackle these issues, such as designing coproduced services with the support of LGBTQ+ communities
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Migration in far West Nepal: reflections on movements in and from the region
No full textIn this comment on an article published in Critical Asian Studies 43 (1), "Migration in Far West Nepal," the author questions whether the "Bourdieu social practice framework," which Ephraim Poertner, Mathais Junginger, and Ulrike Müller-Böker employ in their article, provides the most appropriate lens through which to view migration. He argues that the authors fail to present convincing evidence of the relevance of its application. Furthermore, he says, a further dichotomy might need to be addressed first: that between French approaches to social theory and Anglo-Saxon approaches such as that of Anthony Giddens, where the time/space dimensions are much more evident, even if problematic, in the examining structure and agency
Migration in far West Nepal: reflections on movements in and from the region
No full textIn this comment on an article published in Critical Asian Studies 43 (1), "Migration in Far West Nepal," the author questions whether the "Bourdieu social practice framework," which Ephraim Poertner, Mathais Junginger, and Ulrike Müller-Böker employ in their article, provides the most appropriate lens through which to view migration. He argues that the authors fail to present convincing evidence of the relevance of its application. Furthermore, he says, a further dichotomy might need to be addressed first: that between French approaches to social theory and Anglo-Saxon approaches such as that of Anthony Giddens, where the time/space dimensions are much more evident, even if problematic, in the examining structure and agency
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Development of quantitative techniques for the study of discharge events during plasma electrolytic oxidation processes
Get PDFPlasma electrolytic oxidation, or PEO, is a surface modification process for the production of ceramic oxide coatings upon substrates of metals such as aluminium, magnesium and titanium. Two methodologies for the quantitative study of electrical breakdown (discharge) events observed during plasma electrolytic oxidation processes were developed and are described in this work.
One method presented involves direct measurement of electrical breakdowns during production of an oxide coating within an industrial scale PEO processing arrangement. The second methodology involves the generation and measurement of electrical breakdown events through coatings pre-deposited using full scale PEO processing equipment. The power supply used in the second technique is generally of much lower power output than the system used to initially generate the sample coatings.
The application of these techniques was demonstrated with regard to PEO coating generation on aluminium substrates. Measurements of the probability distributions of discharge event characteristics are presented for the discharge initiation voltage; discharge peak current; event total duration; peak instantaneous power; charge transferred by the event and the energy dissipated by the discharge.
Discharge events are shown to increase in scale with the voltage applied during the breakdown, and correlations between discharge characteristics such as peak discharge current and event duration are also detailed. Evidence was obtained which indicated a probabilistic dependence of the voltage required to initiate discharge events. Through the scaling behaviour observed for the discharge events, correspondence between the two measurement techniques is demonstrated. The complementary nature of the datasets obtainable from different techniques for measurement of PEO discharge event electrical characteristics is discussed with regards to the effects of interactions between concurrently active discharge events during large scale PEO processing
Modelling the corrosion behaviour of Al2CuMg coarse particles in copper-rich aluminium alloys
Get PDFThe corrosion behaviour of 2024 aluminium alloy in sulphate solutions was studied; attention was focused on the influence of coarse intermetallic Al2CuMg particles on the corrosion resistance of the alloy. Model alloys representative of the aluminium matrix and of Al2CuMg coarse intermetallics were synthesized by magnetron sputtering. Open-circuit potential measurements, current–potential curve plotting and galvanic coupling tests were performed in sulphate solutions with or without chlorides. Further explanations were deduced from the study of the passive films grown on model alloys in sulphate solutions. The results showed that model alloys are a powerful tool to study the corrosion behaviour of aluminium alloys
Fast migration of fluoride ions in growing anodic titanium oxide
Get PDFThe rapid inward migration of fluoride ions in growing anodic titanium oxide under a high electric field has been elucidated by anodizing a Ti–12 at% silicon alloy, where film growth proceeds at nearly 100% efficiency in selected electrolytes. Further, incorporated silicon species in the anodic film are immobile, acting as marker species. The migration rate of fluoride ions is determined precisely by three-stage anodizing, consisting of initial anodic film formation at a constant current density to 50 V in ammonium pentaborate electrolyte, subsequent incorporation of fluoride ions by reanodizing to 55 V in ammonium fluoride electrolyte and, finally, anodizing again in ammonium pentaborate electrolyte at high current efficiency. The resultant films were analyzed by glow discharge optical emission spectroscopy to reveal the depth distribution of fluoride ions and the location of the silicon marker species. The fluoride ions migrate inward at twice the rate of O2− ions. Consequently, anodizing of titanium in fluoride-containing electrolytes develops a fluoride-rich layer that separates the alloy substrate from the anodic oxide, with eventual detachment of the film from the substrate
Growth of porous anodic alumina films in hot phosphate–glycerol electrolyte
Get PDFGrowth of porous anodic alumina films has been examined at 10 V in hot phosphatecontaining glycerol electrolyte containing from 0.1 to 0.57 mass% water. The growth rate of the films is highly dependent upon the water content of the electrolyte, reducing markedly at a water content of 0.1 mass%, an opposite trend to that found previously for formation of porous films on titanium and niobium. Chemical dissolution of the anodic alumina is also suppressed in electrolyte of low water content. GDOES depth profiles revealed that an increased water content of the electrolyte promoted incorporation of phosphorus species into the films, although chemical dissolution reduced the amounts of phosphorus in the outer regions. Carbon species also appeared to be present in films, particularly at lower water content. Using a niobium oxide outer layer to suppress chemical dissolution resulted in films that were about 1.2 times the thickness of the consumed aluminium for an electrolyte containing 0.25 mass% water. The expansion suggests possible contribution of field-assisted flow of film material in growth of the porous anodic film
Control of morphology and surface wettability of anodic niobium oxide microcones formed in hot phosphate-glycerol electrolytes
Get PDFWe report the fabrication of superhydrophobic surfaces with a hierarchical morphology by self-organized anodizing process. Simply by anodizing of niobium metal in hot phosphate-glycerol electrolyte, niobium oxide microcones, consisting of highly branched oxide nanofibers, develop on the surface. The size of the microcones and their tip angles are controlled by changing the applied potential difference in anodizing and the water content in the electrolyte. Reduction of the water content increases the size of the microcones, with the nanofibers changing to nanoparticles. The size of microcones is also reduced by increasing the applied potential difference, without influencing the tip angle. The hierarchical oxide surfaces are superhydrophilic, with static contact angles close to 0°. Coating of the anodic oxide films with a monolayer of fluoroalkyl phosphate makes the surfaces superhydrophobic with a contact angle for water as high as 175° and a very small contact angle hysteresis of only 2°. The present results indicate that the larger microcones with smaller tip angles show the higher contact angle for water
Importance of water content in formation of porous anodic niobium oxide films in hot phosphate-glycerol electrolyte
Get PDFNiobium has been anodized at a constant current density to 10 V with a current decay in 0.8 mol dm-3 K2HPO4-glycerol electrolyte containing 0.08 to 0.65 mass% water at 433 K to develop porous anodic oxide films. The film growth rate is markedly increased when the water content is reduced to 0.08 mass%; a 28 μm-thick porous film is developed in this electrolyte by anodizing for 3.6 ks, while the thickness is 4.6 and 2.6 μm in the electrolytes containing 0.16 and 0.65 mass% water respectively. For all the electrolytes, the film thickness changes approximately linearly with the charge passed during anodizing, indicating that chemical dissolution of the developing oxide is negligible. SIMS depth profiling analysis was carried for anodic films formed in electrolyte containing ~0.4 mass% water with and without enrichment of H218O. Findings disclose that water in the electrolyte is a predominant source of oxygen in the anodic oxide films. The anodic films formed in the electrolyte containing 0.65 mass% water are practically free from phosphorus species. Reduction in water content increased the incorporation of phosphorus species
