90 research outputs found
An investigation into damage initiation and propagation in carbon fibre reinforced plastics
No full textIn this investigation into the initiation and propagation of damage in CFRP materials, a method was first established whereby damage could be induced, during flexure, at the centre of thin plate-like cantilever specimens. An acceptable clamping shape was found using 3-D Finite Element modelling. This technique was also useful in deducing the types of stress that were responsible for delamination, and in assessing the fatigue resistance of various layups. Results were confirmed by Thermography and Scanning Electron Microscope results. Experimental results indicated that damage initiation during flexural fatigue occurred earlier for higher surface strains, and that subsequent delamination affected damping, natural frequency and static stiffness of specimens. There was also shown to be the possibility of the existence of a fatigue strain limit for the material. Experimental and theoretical work was extended to examine the condition of in-plane stress with superimposed dynamic excitation. Here, difficulty was experienced in designing experiments complementary to F.E. models. However, results predicted the direction of damage propagation and that the presence of in-plane stresses could be detrimental to fatigue life. A more refined F.E. model in which delamination could be opened between desired layers, indicated that shear stresses were greater the further the delamination was sited from the neutral plane. Since failure during experiments always occurred between the same two layers, this suggested that high shear stresses had a stronger influence upon crack initiation than small defects which might have occurred anywhere throughout the thickness. Acoustic Emission work demonstrated the existence of 'micromechanical' damage, which was suspected to be fibre breakage. At a constant amplitude of dynamic flexural loading, emissions occurred initially, but after a certain time ceased almost completely. A hypothesis was suggested to account for such mechanisms, and their possible influence upon delamination
Through the Mackenzie Basin: A narrative of the Athabasca and Peace River Treaty expedition of 1889
No full text"Through the Mackenzie Basin," is 500 pages, including the index. There are over 60 pages of historical photographs and maps interspersed with the text. The first third of the book is written by Charles Mair and is devoted to the Athabasca and Peace River Treaty Expeditions of 1899. The rest of the book is written by Roderick MacFarlane and is devoted to descriptions of Mammals and Birds encountered in Northern Canada
Through the Mackenzie Basin: A narrative of the Athabasca and Peace River Treaty expedition of 1889
No full textBook - "Through the Mackenzie Basin," is 500 pages, including the index. There are over 60 pages of historical photographs and maps interspersed with the text. The first third of the book is written by Charles Mair and is devoted to the Athabasca and Peace River Treaty Expeditions of 1899. The rest of the book is written by Roderick MacFarlane and is devoted to descriptions of Mammals and Birds encountered in Northern Canada (520 pages
Assessing young people’s learning needs related to sexuality and relationships on the Maltese Islands
No full textThis research explored young people’s learning needs related to sexuality and relationships withinthe current rapidly changing social, cultural and religious context of the Maltese Islands. It alsoexplored the challenges, opportunities and alternative means by which these needs can be met. Adefinitional matrix for needs assessment that adopts a sociological perspective to people’s needs,which is widely used in health promotion, was employed. This thesis was framed around theunderlying principles of youth involvement, participation and empowerment, and thus emphasisedyoung people’s own perspective of their learning needs.The mixed-methodology approach was adopted in this research. The first stage of investigationsought to achieve an overview of sexual behaviour and knowledge among young Maltese peopleaged 14 - 16 attending secondary schools. A stratified random sample of 1310 pupils (68% responserate) provided a first-ever snapshot of young people’s sexual behaviour in Malta. The second stagesought to explore young people’s felt and expressed learning needs within and outside the schoolsetting by way of sixteen focus groups involving another 166 pupils.Findings suggest a relatively low rate of pupils who would have practiced sexual intercourse byschool-leaving age in Malta (12.3%). Mean age at first intercourse seems similar to that of otherEuropean countries (14 years) for both genders. Only a fifth used condoms every time they had sex.Knowledge of STIs was scant. The pupils were more informed about HIV. Girls were moreknowledgeable. Boys had sex with more sexual partners. No gender differences were noted insubstance abuse with sex. Discussions among pupils revealed a high degree of perceived unmetlearning need. Participants valued highly learning about sexuality but thought it received much lessattention than their other academic learning needs. Disparities between schools were evidenced.Learning was sporadic and uncoordinated with conflicting messages from different teachers. Oftensessions started timely to pupils’ needs, but ended prematurely. Learning from parents was scantyand associated with the overall relationship and bonding between parents and the child. Gaps werenoted between perceived ideal sources (teachers, parents and visiting speakers) and actual /preferred sources (friends and the media). Needs were perceived in relation to the content andtiming of learning, sources of knowledge, learning styles and resources. Maltese pupils had diversevalues and called for a variety of approaches.Recommendations were made for a national sexuality education policy to standardize theframework of sexuality education among Maltese schools; more initial teacher training and inservicetraining in sexuality education to meet the needs of a diverse group of adolescents throughvarious approaches; more collaboration among teachers within schools; parenting skills and lifelonglearning opportunities for parents; more active involvement of adolescents and a widerconsultation with schools and families in the evaluation of sexuality education
Arthur William Upfield: a biography
No full textThis dissertation is an exhaustive account of the life and work of Arthur William Upfield (1890-1964). It is presented as a critical biography and narrates the life of the writer, in his socio-cultural milieu, from birth. It also positions Upfield as a writer who dealt with issues of Aboriginality at a time when this was a singularly polemical subject. My work is informed by the theory of Zygmunt Bauman and others and is posited in the context of late-modern biography theory.
English-born, Upfield arrived in Australia in 1911 and took work in the bush, serving overseas with the Australian army at the outbreak of World War I and marrying an Australian army nurse in Egypt. Returning with his wife and son to Australia in 1921 he intermittently carried his swag until he was employed patrolling the Western Australian number 1 rabbit-proof fence for three years to 1931. By that time he had published four novels, including two crime novels featuring his fictional creation, the part-Aboriginal, part-European, Detective-Inspector Napoleon Bonaparte ('Bony'), arguably the first fully-developed character in Australian popular fiction.
Leaving the fence, Upfield settled with his family in Perth and wrote full-time until joining the Melbourne Herald in 1933. Retrenched, he resumed career writing to be further interrupted by a war-time intelligence posting in 1939. In 1943 the first Bony mysteries were published in America, where Upfield's critical success was maintained until his death. In 1945 he left his wife for Jessica Uren, to whom he remained devoted.
Upfield's in all twenty-nine Bony novels, many of which have been translated across eleven languages, afforded him notable success both at home and abroad, in good part due to his descriptive gifts and the uniqueness of his fictional character, the part-Aboriginal Bony
Landscape-painter as landscape-gardener : the case of Alfred Parsons R.A.
No full textIn 2 vols.Available from British Library Document Supply Centre-DSC:DXN016830 / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo
Writing and the rights of reality: usurpation and potentiality in Derrida, Plato, Nietzsche, and Beckett
No full textThe thesis critically evaluates Jacques Derrida's conferral of the rights of reality on writing, focussing on his theory of an arche-text in light of the speculative nature of this theory. The theory is initially considered in the context of Derrida's elucidation of the usurpatory status of writing within the Platonic and Nietzschean texts. This consideration reveals an admission of writing's usurpatory status by both writers while at the same time demonstrating their awareness of the intrinsically speculative nature of this view, the significance of writing lying in its ability to exteriorise the radically indeterminate status of consciousness m relation to reality rather than its ability to displace consciousness or reality The analyses, therefore, not only bring the Derridean hypothesis of a repressive or phonocentric metaphysical episteme into question but also exhibit the historical and philosophical role of potentiality in relation to writing, writing's ultimate significance lying in its capacity to exteriorise our existence as a mode of potentiality. Accordingly, in the second half of the thesis the Derridean theory of writing is countered with a specifically Aristotelian theory of the text as it is exhibited in the prose of Samuel Beckett, an author whose significance lies in his close alignment with Derridean theory within contemporary criticism. It is demonstrated that this identification has obviated an awareness of the significance of potentiality within the Beckettian text, his work consequently being appraised in the previously neglected context of Aristotelian metaphysics
Clinicopathological, Morphological, Immunohistochemical and Molecular Biological Characteristics of Rare Salivary Tumors
No full textThe actual dissertation is the result of Olena Koshyk's doctoral study at Charles University in Prague, Faculty of Medicine in Pilsen, from 2019 to 2023. The author focused the main part of her research on rare salivary gland tumors but also participated in studies related to sinonasal soft tissue tumors. The studies used a wide range of investigation methods including morphology, immunohistochemistry, and molecular genetic methods in order to provide new insights for accurate tumor diagnosis and to propose novel approaches and refinements in the classification of selected head and neck tumors. The dissertation is divided into two parts. The first part represents four articles that present the latest data on rare salivary gland tumors. The first paper concentrated on the new rare oncocytic variant of mucoepidermoid carcinoma with comprehensive morphological and immunohistochemical descriptions, and molecular alterations. Special attention was paid to the differential diagnosis with oncocytic tumors for accurate diagnosis. The second study covered a clear cell subtype of myoepithelial carcinoma which showed EWSR gene rearrangements. Different fusions in the PLAG1 gene were found in such tumors but fusion transcripts for the EWSR gene were not detected. The study also focusses on a comparison of the..
Patterns of behavior in biodiversity preservation
No full textConservation budgets are limited, so it is right to ask of biodiversity programs, What should be preserved? How much should be preserved? Where? Recent papers on optimal preservation policy have tried to integrate three considerations: the relative uniqueness of different species or habitats, the degree of risk to their continued survival, and the opportunity cost of the resources needed to enhance their prospects for survival. It is natural to ask, How are we doing? Have biodiversity conservation resources been optimally allocated? What determines government decisions about the preservation of endangered species? The authors submit the first report card, an empirical analysis of U.S. species preservation policy, the best-documented country experience currently available. The authors discuss the most common normative justifications for biodiversity preservation and identify measurable proxies for a subset of those justifications. Proxies include"scientific"species characteristics, such as"degree of endangerment"and"taxonomic uniqueness,"as well as"visceral"characteristics, such as physical size and to what extent a species is considered a"higher form of life."They find that both kindsof characteristics, but especially"visceral"characteristics, influence government decisions on whether to protect a species under the Endangered Species Act. The authors find that"visceral"characteristics- especially physical size and taxonomic class - are also important in explaining how much is spent on endangered species. Perhaps more surprising is their finding that more is spent on animals with lower risk of extinction than on animals with a higher risk of extinction. The author's results are sobering. Many millions have been spent on species preservation, but neither uniqueness nor risk has weighed heavily in resource allocation. Instead there has been a heavy bias toward"charismatic megafauna"- large, well-known birds and mammals ("higher forms of life,"in the human value system). Other classes of fauna - including, say, eels or wild toads - and all flora, have gotten extremely short shrift. Prominent examples of species with high charisma, high attention, and relatively low endangerment are the bald eagle, the Florida scrub jay, and the grizzly bear. Other species may have less charisma but could have more scientific value or species risk.Wildlife Resources,Wetlands,Environmental Economics&Policies,Information Technology,Biodiversity
Klinicko-patologické, morfologické, imunohistochemické a molekulárně biologické charakteristiky vzácných nádorů slinných žláz
No full textThe actual dissertation is the result of Olena Koshyk's doctoral study at Charles University in Prague, Faculty of Medicine in Pilsen, from 2019 to 2023. The author focused the main part of her research on rare salivary gland tumors but also participated in studies related to sinonasal soft tissue tumors. The studies used a wide range of investigation methods including morphology, immunohistochemistry, and molecular genetic methods in order to provide new insights for accurate tumor diagnosis and to propose novel approaches and refinements in the classification of selected head and neck tumors. The dissertation is divided into two parts. The first part represents four articles that present the latest data on rare salivary gland tumors. The first paper concentrated on the new rare oncocytic variant of mucoepidermoid carcinoma with comprehensive morphological and immunohistochemical descriptions, and molecular alterations. Special attention was paid to the differential diagnosis with oncocytic tumors for accurate diagnosis. The second study covered a clear cell subtype of myoepithelial carcinoma which showed EWSR gene rearrangements. Different fusions in the PLAG1 gene were found in such tumors but fusion transcripts for the EWSR gene were not detected. The study also focusses on a comparison of the...Vlastní disertační práce je výsledkem doktorandského studia Oleny Koshyk na Univerzitě Karlově v Praze, Lékařské fakultě v Plzni, v letech 2019 až 2023. Autorka zaměřila hlavní část svého výzkumu na vzácné nádory slinných žláz, ale podílela se i na studiích souvisejících se sinonazálními nádory měkkých tkání. Práce využívaly širokou škálu vyšetřovacích metod včetně morfologie, imunohistochemie a molekulárně genetických metod za účelem získání nových poznatků pro přesnou diagnostiku nádorů a navrhly nové přístupy a vylepšení v klasifikaci specifických nádorů. Dizertační práce je rozdělena do dvou částí. První část představuje čtyři články, které prezentují nejnovější údaje o vzácných nádorech slinných žláz. První práce se soustředila na novou vzácnou onkocytární variantu mukoepidermoidního karcinomu s komplexním morfologickým a imunohistochemickým popisem a molekulárními změnami. Zvláštní pozornost byla věnována diferenciální diagnostice s onkocytárními nádory. Druhá studie se věnovala světlobuněčnému myoepiteliálnímu karcinomu, který vykazoval rearanži genu EWSR. V takových nádorech byly nalezeny různé fúze v genu PLAG1, ale fúzní transkripty pro gen EWSR nebyly nalezeny. Studie také pojednává o srovnání biologie myoepiteliálních nádorů slinné žlázy s myoepiteliálními nádorry měkkých tkání a kůže....Šiklův ústav patologieFaculty of Medicine in PilsenLékařská fakulta v Plzn
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