16,378 research outputs found
Women, Work, More: Working Mothers & the Pressures of Motherhood — with Amanda Watson
No full textAmanda Watson is an author, lecturer, researcher, and mother of two. Her new book, The Juggling Mother: Coming Undone in the Age of Anxiety, is available from UBC Press. She is a Lecturer in the Department of Sociology and Anthropology at Simon Fraser University, and has a focus on feminist teaching and learning. Amanda teaches and studies theories of labour, capitalism, motherhood, care, representation, and popular culture. She also writes opinions for newspapers and magazines. Her next book project explores the politics of the BirthStrike movement for climate justice. Resources:— The Juggling Mother: Coming Undone in an Age of Anxiety: www.ubcpress.ca/the-juggling-mother— Amanda\u27s website: www.amandadwatson.com/— Amanda Watson & the birthstrike movement: www.sfu.ca/sociology-anthropol…on-sshrc-grant.htm
Charlie May Simon materials
No full textThis collection contains materials relating to Arkansas author Charlie May Simon
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Security in the City
No full textAbout the book:
Provides the first introductory sociological analysis of security in the 21st century. Students will find one of the central issues of modern times--security--analyzed in all its different aspects, from global geo-politics to intimate personal relations. The themes of matter, mediation and the individual are drawn across the whole book.Security draws on five authors who each produce a sociological analysis of the subject in their areas of expertise, to provide a complex yet accessible exploration of the role security plays in all our lives. Sophie Watson explores security and the city, drawing on examples such as the role of SUVs and of surveillance. Matt McDonald explores how security is made in international relations, touching on climate change and asylum seekers. Elizabeth Silva takes security into the home, examining how daily routines make ordered lives. Simon Carter and George Davey-Smith look at risks and fears in the area of health and security, taking in examples such as heart disease and the metered dose inhaler used by asthma sufferers. Tim Jordan introduces and overviews the book through the examples of the Harry Potter brand and how it touches on children's emotional development and how the growing of food for personal consumption can lead to security and insecurity
Moderate contact between sub-populations promotes evolved assortativity enabling group selection
No full textGroup selection is easily observed when spatial group structure is imposed on a population. In fact, spatial structure is just a means of providing assortative interactions such that the benefits of cooperating are delivered to other cooperators more than to selfish individuals. In principle, assortative interactions could be supported by individually adapted traits without physical grouping. But this possibility seems to be ruled-out because any ‘marker’ that cooperators used for this purpose could be adopted by selfish individuals also. However, here we show that stable assortative marking can evolve when sub-populations at different evolutionarily stable strategies (ESSs) are brought into contact. Interestingly, if they are brought into contact too quickly, individual selection causes loss of behavioural diversity before assortative markers have a chance to evolve. But if they are brought into contact slowly, moderate initial mixing between sub-populations produces a pressure to evolve traits that facilitate assortative interactions. Once assortative interactions have become stablished, group competition between the two ESSs is facilitated without any spatial group structure. This process thus illustrates conditions where individual selection canalises groups that are initially spatially defined into stable groups that compete without the need for continued spatial separation
Using self-assembly techniques for green lubrication solutions in tribological contacts
No full textThis thesis presents a novel lubrication solution for silicon nitride hybrid bearings developed through the use of polymer brush technology, specifically brushes created using surface initiated atom transfer radical polymerisation. This work also details a novel testing regime utilising custom colloidal probes to replicate, for the first time, this hybrid bearing under atomic force microscopy in both dry and lubricated conditions. Due to their promising tribological properties polymer brushes have the potential to be a lubrication solution for the hybrid bearing system where current lubrication solutions are not tailored to the surfaces and contain harmful components such as sulphur and phosphorus. Polymer brush systems have generated considerable interest in the academic community as a possible new greener lubrication solution. To further understand the mechanism by which an effective polymer brush can be employed in a tribological contact this study was initiated. As the first known study to investigate the effect of the polymer brushes on the silicon nitride-steel contact, previous literature findings have been reapplied to a novel material for a novel application. Grafting from the silicon nitride surface ensures that less additive competition will occur. Poly(methyl methacrylate) (PMMA) brushes were chosen for the reduction of steric hindrance within the polymer chain therefore allowing a higher density brush and better load carrying capacity in a tribological sense. These brushes act synergistically with a poly-alpha-olefin, a high quality base oil lubricant present in the type of engine where these hybrid bearing operate. The synergy here refers to the swelling effect in which the anchored macromolecule and base oil work as one to repel the asperity contacts, reducing friction whilst the brush system protects itself. The formation of polymer brushes on a silicon nitride surface utilises atom transfer radical polymerisation (ATRP) and activators regenerated by electron transfer (ARGET) coupled with a surface initiation step. Initiating from the surface allows a strong covalent bond to the contact surface ensuring stability when the final brush is subjected to physical interactions, the main advantage being that by adding monomer molecules individually in situ the steric interaction of the chain-chain iterations in the growing brush is reduced so denser films can be formed, especially with small molecules such as MMA. By applying recent developments such as ARGET synthesis of the polymer brush is made much easier, as this technique allows reactions to occur with limited amounts of oxygen present as well as reducing the quantity of the copper complex needed for the reaction. By investigating the chemical and mechanical properties of the polymer brush with techniques such as ellipsometry, atomic force microscopy (AFM), and x-ray photoelectron spectroscopy (XPS), it is possible to suggest explanations for the tribological properties of the polymer brush system. Detailed XPS analysis shows that bromine is still present at the surface, a key indicator that the functional sites of the polymer process are still available to be bonded for increasing the chain length while also indicating that fewer termination reactions had occurred. With a lack of silicon visible in the XPS sample spectra it is clear that the polymer has achieved good surface coverage and should therefore exhibit better tribological characteristics. By using novel, custom made stainless steel colloidal probes, it has been possible for the first time to replicate the hybrid contact on the nanoscale, which allows high quality testing by accurately replicating the materials in contact and thus an effective evaluation of the lubrication solution. The importance of the polymer thickness, measured by ellipsometry, and the liquid in which they are solvated, is clearly elucidated by testing in multiple fluids, when highly synergetic fluids like the poly-alpha-olefin result in a significant reduction in friction whereas poor solvents like water can even be detrimental when compared to the bare surfaces in contact. In the worst case scenario under the highest load using the novel probes the lubricated polymer brush reduced the friction force successfully from 3.3 nN to 1.3 nN when compared to the bare nitride surface. Preliminary work has been completed in respect to the transition from the nanoscale to the macroscale, and the polymerisation reaction has been scaled from 1 cm2 silicon nitride wafers up to a 10 cm diameter silicon nitride discs. One of the reasons why the polymerisation can be scaled in such a way is due to the ARGET technique which allows polymerisations to occur in the presence of limited amounts of air. A tribological study of these PMMA modified disc surfaces using a pin-on-disc setup shows favourable results and on average a reduction of friction of 15% when comparing PMMA modified surfaces with unmodified ones in an oil lubricated environment
Simon Nyakot
Full text linkabstract: Simon Nyakot left his village when he was six years old.
“Lost Boys Found” is an ongoing, interdisciplinary project that is collecting, recording and archiving the oral histories of the Lost Boys/Girls of Sudan. The collection is a work-in-progress, seeking to record the oral history of as many Lost Boys/Girls as are willing, and will be used in a future book.Age: 27Region: LakeThis picture and bio was donated to the Lost Boys Found project from The Arizona Lost Boys Cente
Evolution of Individual Group Size Preference can Increase Group-level Selection and Cooperation
No full textThe question of how cooperative groups can evolve and be maintained is fundamental to understanding the evolution of social behaviour in general, and the major transitions in particular. Here, we show how selection on an individual trait for group size preference can increase variance in fitness at the group-level, thereby leading to an increase in cooperation through stronger group selection. We are thus able to show conditions under which a population can evolve from an initial state with low cooperation and only weak group selection, to one where group selection is a highly effective force
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Health and security
No full textAbout the book:
Provides the first introductory sociological analysis of security in the 21st century. Students will find one of the central issues of modern times, security, analyzed in all its different aspects, from global geo-politics to intimate personal relations. The themes of matter, mediation and the individual are drawn across the whole book. "Security" draws on five authors who each produce a sociological analysis of the subject in their areas of expertise, to provide a complex yet accessible exploration of the role security plays in all our lives. Sophie Watson explores security and the city, drawing on examples such as the role of SUVs and of surveillance. Matt McDonald explores how security is made in international relations, touching on climate change and asylum seekers.Elizabeth Silva takes security into the home, examining how daily routines make ordered lives. Simon Carter and George Davey-Smith look at risks and fears in the area of health and security, taking in examples such as heart disease and the metered dose inhaler used by asthma sufferers
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