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(Wolverhampton Intellectual Repository and E-Theses)
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First Report on the Geologic Occurrence of Natural Na–A Zeolite and Associated Minerals in Cretaceous Mudstones of the Paja Formation of Vélez (Santander), ColombiaThis study reports for the first time the geologic occurrence of natural zeolite A and associated minerals in mudstones from the Cretaceous Paja Formation in the urban area of the municipality of Vélez (Santander), Colombia. These rocks are mainly composed of quartz, muscovite, pyrophyllite, kaolinite and chlorite group minerals, framboidal and cubic pyrite, as well as marcasite, with minor feldspar, sulphates, and phosphates. Total organic carbon (TOC), total sulfur (TS), and millimeter fragments of algae are high, whereas few centimeters and not biodiverse small ammonite fossils, and other allochemical components are subordinated. Na–A zeolite and associated mineral phases as sodalite occur just beside the interparticle micropores (honeycomb from framboidal, cube molds, and amorphous cavities). It is facilitated by petrophysical properties alterations, due to processes of high diagenesis, temperatures up to 80–100 °C, with weathering contributions, which increase the porosity and permeability, as well as the transmissivity (fluid flow), allowing the geochemistry remobilization and/or recrystallization of pre-existing silica, muscovite, kaolinite minerals group, salts, carbonates, oxides and peroxides. X-ray diffraction analyses reveal the mineral composition of the mudstones and scanning electron micrographs show the typical cubic morphology of Na–A zeolite of approximately 0.45 mμ in particle size. Our data show that the sequence of the transformation of phases is: Poorly crystalline aluminosilicate → sodalite → Na–A zeolite. A literature review shows that this is an unusual example of the occurrence of natural zeolites in sedimentary marine rocks recognized around the world.
Job stress and employee outcomes: employment practices in a charityDesign/methodology/approach We collected both quantitative (through a staff survey and administrative records of sick leave in the previous 12 months) and qualitative data (through interviews and focus groups) from one branch of an internationally well-established and UK-based religious charity between 2017 and 2018. Purpose The study intends to examine employee relations with a changing workforce resulting from the business-like transformation in the charity sector. We investigated sector-specific employment practices which can alleviate job stress (as a given and which has been made worse by the transformation). Developed from the intrinsic and extrinsic motivation framework, the findings can inform human resource management practices in its new efficiency-seeking business model. Findings The quantitative results support a strong mediating effect of job satisfaction between job stress and staff sick leave. The negative correlation shown between job stress and job satisfaction is subject to paid staff perception of meaningful work and their level of involvement in decisionmaking, with the latter having a stronger moderating effect. The qualitative data provides further contextualized evidence on the findings. Practical implications It is important for charities to uphold and reflect their charitable mission towards beneficiaries and paid staff during the shift to an efficiency-seeking business model. Charities should involve their new professional workforce in strategic decision-making to better shape a context-based operational model. Originality/value The study examined employee relations in the nonprofit charity sector with a changing workforce during the transition to a more business-oriented model. In particular, we revealed sector-specific factors that can moderate the association between job stress and absenteeism, and thereby contribute to the understanding of HRM practices in the sector.
Minimum energy transmission forest-based Geocast in software-defined wireless sensor networksWireless Sensor Networks (WSNs)-based geographic addressing and routing have many potential applications. Geocast protocols should be made energy efficient to increase the lifetime of nodes and packet delivery ratio. This technique will increase the number of live nodes, reduce message costs, and enhance network throughput. All geocast protocols in the literature of WSN apply mostly restricted flooding and perimeter flooding, which is why still the redundancy they produce significantly high message transmission costs and unnecessarily eats up immense energy in nodes. Moreover, perimeter flooding cannot succeed in the presence of holes. The present article models wireless sensor networks with software-defined constructs where the network area is divided into some zones. Energy-efficient transmission tree(s) are constructed in the geocast area to organize the flow of data packets and their links. Therefore, redundancy in the transmission is eliminated while maintaining network throughput as good as regular flooding. This proposed technique significantly reduces energy cost and improves nodes' lifetime to function for higher time duration and produce a higher data packet delivery ratio. To the best of the author's knowledge, this is the first work on geocast in SD-WSNs.
‘This is about an ordinary average life with all its ups and downs’: Continuity and change in the life and family experiences of fifty English working-class individuals between the years 1900 and 1945This thesis is a study of the everyday lives of fifty working-class individuals in the first half of the twentieth century. These twenty-six women and twenty-four men were all born between 1899 and 1915 in England and self-identified as working class. These individuals were not politicians, influential historical figures or famous household names – such life histories have been recounted on many occasions – rather these are ‘ordinary average’ people, whose unpublished autobiographies this thesis draws upon to offer an insight into the everyday struggles, sacrifices and triumphs that the working class experienced between the years 1900 and 1945. By taking a microhistorical approach and focusing on this sample of fifty life stories, this thesis sheds light on wartime life, the impact of social change and the continued importance of working-class family values during the first half of the twentieth century. It uses these autobiographies to question the assumption that living through a period that witnessed two world wars would automatically equate to a life that was completely overshadowed by them. It also challenges the often accepted idea that wider social changes such as educational reform, the opening up of new employment opportunities and the fertility decline would have necessarily affected each working-class individual, suggesting instead that whilst change in these areas had certainly occurred by the end of the twentieth century, it was often too late to affect the lives of these autobiographers. Instead, the autobiographies suggest that the working-class lives were shaped by other issues of significance, most notably domesticity and the family life cycle. The thesis’ chapters focus on the five topics that the autobiographers most frequently discussed: death, absence, family relationships, consumption (with a particular focus on leisure, food and housing), and education and employment opportunities. The reminiscences on these topics revealed much that confirmed existing academic insights into working-class life between the years 1900 and 1945, including the importance of domestic ideals to working-class family life and the continued popularity of marriage as an institution Yet, importantly, as this thesis argues, they also revealed a variety of differing, although equally relevant and noteworthy experiences that have thus far been overlooked. These include a distinct lack of war-related deaths or war-related absences of immediate family members despite living through two conflicts, the subtle shift towards a companionate style of marriage and the significance of expectations of the working-class family life cycle in responses to instances of death or absence.