Structural behaviour of glass reinforced plastics

The aim of this research is to promote the use of G.R.P. as a structural material. In the past, the use of G.R.P. has been confined to non-load carrying applications. Such uses are still rapidly increasing but in addition significant changes have been made during the last decade in the development of semi-structural and now even fully structural applications. Glass-reinforced plastic is characterized by a high strength but a relatively low modulus of elasticity. For this reasona G.R.P. structure can expect to show large deformations as a result of which the individual structural members will fail under load due to a loss of stability rather than approaching the ultimate strength of the material. For this reason the selection of the geometrical shapes of G.R.P. structural elements is considered to be an important factor in designing G.R.P. structures. The first chapter of this thesis deals with a general review of the theoretical and experimental methods used to describe the structural properties of G.R.P. The research programme includes five stages dealing with the structural behaviour of G.R.P. The first stage (Chapter 2) begins with selecting and designing an optimum box beam cross-section which gives the maximum flexural and torsional rigidity. The second stage of investigation (Chapter 3) deals with beam to beam connections. A joint was designed and manufactured with different types of fasteners used to connect two beam units. A suitable fastener was selected and the research extended to cover the behaviour of long span beams using multiple joints. The third part of the investigation includes a study of the behaviour of box beams subjected to combined bending, shear and torsion. A special torque rig was developed to perform the tests. Creep deformation of 6 m span G.R.P. was investigated as the fourth stage under a range of loading conditions. As a result of the phenomenon of post buckling behaviour exhibited in the compression flange during testing of box beams during earlier stages of the investigation it was decided to consider this phenomenon in more detail in the final stage of the investigation. G.R.P. plates with different fibre orientation were subjected to uniaxial compression and tested up to failure. In all stages of the investigation theoretical predictions and experimental results were compared and generally good correlation between theory and experimental data was observed.

British racial discourse: a study of political discourse about race and race-related matters at parliamentary and borough council levels

'British Racial Discourse' is a study of political discourse about race and race-related matters. The explanatory theory is adapted from current sociological studies of ideology with a heavy emphasis on the tradition developed from Marx and Engels's Feuerbach. The empirical data is drawn from the parliamentary debates on immigration and the Race Relations Bills, Conservative and Labour Party Conference Reports, and a set of interviews with Wolverhampton Borough councillors. Although the thesis has broader significance for British political discourse about race, it is particularly concerned with the responses of members of the two main political parties, rather than with the more overt and sensational racism of certain extreme Right-wing groups. Indeed, as the study progresses, it focuses more and more narrowly on the phenomenon of 'deracialised' discourse, and the details of the predominantly class-based justificatory systems of the Conservative and Labour Parties. Of particular interest are the argument forms (used in the debates on immigration and race relations) which manage to obscure the white electorate's responsibility for prejudice and discrimination. Such discoursive forms are of major significance for understanding British race relations, and their detailed examination provides an insight into the way in which 'ideological facades' are created and maintained.

The acquisition of French past tenses by tutored anglophone advanced learners : is aspect enough?

Following Andersen's (1986, 1991) study of untutored anglophone learners of Spanish, aspectual features have been at the centre of hypotheses on the development of past verbal morphology in language acquisition. The Primacy of Aspect Hypothesis claims that the association of any verb category (Aktionsart) with any aspect (perfective or imperfective) constitutes the endpoint of acquisition. However, its predictions rely on the observation of a limited number of untutored learners at the early stages of their acquisition, and have yet to be confirmed in other settings. The aim of the present thesis is to evaluate the explanatory power of the PAH in respect of the acquisition of French past tenses, an aspect of the language which constitutes a serious stumbling block for foreign learners, even those at the highest levels of proficiency (Coppieters 1987). The present research applies the PAH to the production of 61 anglophone 'advanced learners' (as defined in Bartning 1997) in a tutored environment. In so doing, it tests concurrent explanations, including the influence of the input, the influence of chunking, and the hypothesis of cyclic development. Finally, it discusses the cotextual and contextual factors that still provoke what Anderson (1991) terms "non-native glitches" at the final stage, as predicted by the PAH. The first part of the thesis provides the theoretical background to the corpus analysis. It opens with a diachronic presentation of the French past tense system focusing on present areas of competition and developments that emphasize the complexity of the system to be acquired. The concepts of time, grammatical aspect and lexical aspect (Aktionsart) are introduced and discussed in the second chapter, and a distinctive formal representation of the French past tenses is offered in the third chapter. The second part of the thesis is devoted to a corpus analysis. The data gathering procedures and the choice of tasks (oral and written film narratives based on Modern Times, cloze tests and acceptability judgement tests) are described and justified in the research methodology chapter. The research design was shaped by previous studies and consequently allows comparison with these. The second chapter is devoted to the narratives analysis and the third to the grammatical tasks. This section closes with a summary of discoveries and a comparison with previous results. The conclusion addresses the initial research questions in the light of both theory and practice. It shows that the PAH fails to account for the complex phenomenon of past tense development in the acquisitional settings under study, as it adopts a local (the verb phrase) and linear (steady progression towards native usage) approach. It is thus suggested that past tense acquisition rather follows a pendular development as learners reformulate their learning hypotheses and become increasingly able to shift from local to global cues and so to integrate the influence of cotext and context in their tense choice.

An insight into the activation mechanism of the calcatonin-gene-related peptide receptor

The calcitonin-gene- related peptide (CGRP) receptor is unique among G-protein coupled receptors (GPCRs) as it consists of at least three proteins: calcitonin receptor like receptor (CLR), receptor activity modifying protein (RAMP)1 and receptor component protein (RCP). An endogenous agonist for this curious receptor is aCGRP, which is a sensory nerve-derived peptide made up of 37 amino acids. aCGRP acts as a potent vasodilator having pronounced effects on arterioles and capillaries. Understanding the pharmacodynamics of the CGRP receptor may have pharmaceutical benefit as the receptor has been associated with the onset of migraines and implicated in Raynauds syndrome. The primary aim of this thesis was to identify functionally important residues in the extracellular face of the CGRP receptor. Three areas of interest were selected including the extreme N-terminus of the CLR, extracellular loop 1 (ECL1) of the CLR and its associated transmembrane (TM) regions, and finally extracellular loop 3 (ECL3) of the CLR and its juxtamembrane regions. A site-directed mutagenesis (SDM) strategy was used to investigate these regions, primarily substituting the innate residues of CLR with alanine and assessing the mutation on multiple criteria including a functional cAMP assay, cell-surface expression, total expression, agonist-mediated internalisation and aCGRP binding. The results are interpreted and discussed taking into consideration contemporary concepts surrounding Secretin-like GPCRs. Moreover, the thesis also contains details of RAMP purification. Overall the thesis provides novel data that furthers insight into the complex phenomenon of CGRP receptor activation. Site-directed mutants have been identified that affect aCGRP binding, receptor signal transduction, the CLR/RAMP1 interface and the integrity of the protein complex structure.

Soliton-based discriminator of noncoherent optical pulses

We introduce the concept of noncoherent optical pulse discrimination from a coherent (or partially coherent) signal of the same energy using the phenomenon of soliton generation. The impact of randomization of the optical signal content on the observable characteristics of soliton generation is examined and quantified for the particular example of a rectangular pulse.

Structure and thermal properties of yttrium alumino-phosphate glasses

The structure and thermal properties of yttrium alumino-phosphate glasses, of nominal composition (Y2O3)(0.31-z)(Al2O3)(z)(P2O5)(0.69) with 0 less than or similar to z less than or similar to 0.31, were studied by using a combination of neutron diffraction, Al-27 and P-31 magic angle spinning nuclear magnetic resonance, differential scanning calorimetry and thermal gravimetric analysis methods. The Vickers hardness of the glasses was also measured. The data are compared to those obtained for pseudo-binary Al2O3-P2O5 glasses and the structure of all these materials is rationalized in terms of a generic model for vitreous phosphate materials in which Y3+ and Al3+ act as modifying cations that bind only to the terminal (non-bridging) oxygen atoms of PO4 tetrahedra. The results are used to help elucidate the phenomenon of rare-earth clustering in phosphate glasses which can be reduced by substituting Al3+ ions for rare-earth R3+ ions at fixed modifier content.

Migration and mobility of new Polish migrants in England:narratives of lived experience

This thesis sets out to understand the act of migrating in a period of growing movement of people. It captures the subjective experience of individual migrants, as narrated in the migration stories of 32 “new” Polish migrants in the West Midlands region of England. Since the enlargement of the European Union in 2004, over half a million Poles have arrived and registered to work in the UK, constituting one of the largest migration movements in contemporary Britain and Europe. This influx of predominantly young migrants opened up public and academic debates regarding the social relations between the Polish migrants and the host society, their duration of stay, and the impact on the economy and social services. While a substantial amount of research has now been undertaken on this migration, this thesis highlights some of the significant features of migration to Britain and Europe today, namely its dynamic, fluid, complex and varied character. Through four themes of lived experience of migration, migration and mobility, gender, and return migration, this thesis uncovers and explores the phenomenon of post-2004 EU migration from the perspective of migrants themselves. Migrant stories in this thesis are linked with experiences and meanings of migration, but also migrants’ emotions, perceptions, views and opinions. By exploring individual journeys of migration and deliberating over the determinants and consequences of migration, this thesis asks how the processes of migration and mobility come into play in the everyday lives of migrant people, and how this impacts on questions of identity, home, belonging, gender, as well as return.

Transnationalism as a force for ethnic minority enterprise? The case of Somalis in Leicester

The extant literature on the phenomenon of transnational entrepreneurship has documented that in an era characterized by ‘superdiversity’, ethnic minorities use their diasporic networks to access an array of valuable resources in order to facilitate entrepreneurial activity. The article examines the connection between the notions of ‘superdiversity’, transnationalism and entrepreneurship by illuminating the dynamics of ‘transnational’ Somali business activity in Leicester. Considering this as a critical case, we attempt to address a gap in the literature on ethnic minority enterprise, which has struggled to address the ‘diversification of diversity’ that attends the arrival of new communities in the UK. Moreover, the article contributes to the discussion on the importance of ‘conditioning factors’ in explaining the ‘integration’ of new arrivals. Although familial and co-ethnic ties influence the availability and interaction of social, financial and human capital, this falls considerably short of neoliberal depictions of globalization. The political-economic context imposes harsh constraints upon Somali business activity which cannot be circumvented by the utilization of diasporic links, and transnational entrepreneurship is likely to be the preserve of a minority of minorities.

Intercultural intertextuality as a translation phenomenon

Texts as communicative occurrences are characterised by their interdependence on other texts, either of the same genre or of a different genre. This characteristic feature is known as intertextuality (or discursivity). The relationship can either be to texts originating in the same language and culture, or to texts originating in another language and culture. This paper comments on the discourse phenomenon of 'intercultural intertextuality' from the point of view of translation (studies). It illustrates strategies employed in the original texts for referring to the source language/culture. Subsequently, the paper explores the translation strategies used in authentic target texts in dealing with the phenomenon of intercultural intertextuality. A variety of political speeches (mainly of the language pair English and German) are used as illustrative examples.

The idea of the hybrid text in translation revisited

This concluding chapter provides responses to some of the issues raised in the individual chapters, highlighting similarities and differences in the interpretation of the concept of the hybrid text. The questions dealt with here concern the notion of hybridity and the definition of hybrid text; the contexts in which hybrid texts emerge; the functions of hybrid texts; the various levels at which hybrid phenomena manifest themselves; the genres to which the notion of the hybrid text applies; the effects of hybrid texts; and the status of a hybrid text in Translation Studies. It is concluded that the phenomenon of the hybrid text involves greater complexity than had initially been defined in the discussion paper. There-fore, the original hypothesis is reformulated to account for the fact that hybrid texts are not only the product of a translation process but that they can also be produced as original texts in a specific cultural space, which is often in itself an intersection of different cultures.

Numerical implementation of low-PMD spun fibres with precomputed M(w) matrices

Poster With the use of the coarse-step method for simulating the phenomenon of PMD the fibre-twist as not included into the equations. This was an obstacle in representing low-PMD spun fibres numerially.

Zeros of Sequences of Partial Sums and Overconvergence

2000 Mathematics Subject Classification: 30B40, 30B10, 30C15, 31A15.

Hot-spots during the calcination of MCM-41:a SAXS comparative analysis of a soft mesophase

The phenomenon of microscopic hot-spots, during the calcination of MCM-41, was investigated by quantifying the magnitude of the temperature increase during the calcination of a soft MCM-41 mesophase using a SAXS comparative study. This was performed by thermally treating a soft material that was detemplated via Fenton chemistry followed by equilibrating and drying in a low-surface-tension solvent (n-butanol or N,N-dimethylformamide); these samples have limited structural shrinkage. The resulting samples were thermally treated at increasing temperatures, and the structural shrinkage was compared with that of the directly calcined material. By comparing the structural shrinkage, it was found that the microscopic temperature increase would fall between 190 and 250 C, as deduced from N,N-dimethyl-formamide and n-butanol. The order of magnitude of the temperature increase appears to be consistent with the well-known glow effect. It is, however, substantially higher than the experimentally determined macroscopic temperature increase. Several aspects are discussed to interpret this difference. © 2013 Elsevier B.V.

Kontraszelekció és erkölcsi kockázat a politikában. Vázlat az információs aszimmetria közgazdaságtani fogalmainak politikatudományi alkalmazhatóságáról (Negative selection and moral risk in politics. An outline of the usefulness to political science of the economic concept of information asymmetry)

Az írás a kontraszelekció és az erkölcsi kockázat információ-gazdaságtani fogalmának politikatudományi alkalmazhatósága mellett érvel. Azt kívánja bemutatni, hogy a politikai piac szereplői közti információs aszimmetria mechanizmusainak éppúgy lehetnek súlyos negatív hatásai a demokratikus politikai rendszer működésére nézve, mint ahogy a gazdasági szereplők közti információs aszimmetria - Nobel-díjas közgazdászok érvei szerint - alááshatja a piaci verseny hatékonyságát. Az írás új megvilágításba helyezi a - már Platón óta ismert - politikai kontraszelekció jelenségét, továbbá részletesen foglalkozik az erkölcsi kockázat és a megbízó-megbízott relációk megjelenésével a politikában. Érinti tovább azoknak a mechanizmusoknak - a jelzésnek és a szűrésnek - a megjelenését a politikában, melyeket a közgazdászok az információs aszimmetria csökkentésére ajánlanak. / === / The paper argues in favour of employing in political science the economic concept of information asymmetry, seeking to show that the mechanisms of information asymmetry among the players on the political market may have negative effects on the operation of a democratic political system as information asymmetry among economic actors – according to arguments of Nobel prize-winning economists – has on the efficiency of market competition. The paper sheds new light on the phenomenon of negative political selection (known since Plato's time), and goes on to deal in detail with the appearance of moral risk and client/agent relations in politics. The author touches also on the appearance in politics of mechanisms – signals and filters – that economists suggest for reducing information asymmetry.

What makes ISAF s/tick: An investigation of the politics of coalition burden-sharing

This paper is interested in conceptualising the often raised issue of over- and under-contributing in coalition operations; that of how and why members of complex coalitions2 may be punching above and below their weight, respectively. To this end, the first section presents a parsimonious baseline assumption regarding what variables may fundamentally inform coalition burden-sharing, to subsequently discuss how much each of these are found to play a role in the Afghanistan context. The second section elaborates on this by assessing the perception and the interpretation of threats by coalition member countries, related to Afghanistan, as this pertains to prioritising other variables within the scheme outlined in the previous section. The third and fourth sections then proceed to examine and further enrich the existing literature on coalition burden-sharing, and provide further insights regarding the operations of the International Security Assistance Force–Afghanistan, and regarding ISAF member-country decisionmaking; the objective here is to generate further refined assumptions, that can permit a preliminary assessment of the phenomenon of uneven burden-sharing in ISAF, complementing the initial baseline expectations.