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Proceeding from the aim to reduce global pollution emissions from the continuous burning of hydrocarbons stimulated by increasing energy demand, more efficient and ultra-low emissions’ combustion concepts such as the homogenous charge compression ignition engines (HCCI) have been developed. These new engines rely on the low temperature chemistry (LTC) combustion concept. A detailed investigation of the properties of cool flames, governed by LTC, is essential for the design of these new engines. The primary goal of this work was to build a fundamental counterflow experiment for cool flames studies in a diffusive system, to better understand combustion in LTC engines. The project was intended to provide a basic understanding of the low-temperature reactivity and cool flames properties of butane isomers under atmospheric pressure conditions. This was achieved by establishing self-sustaining cool flames through a novel technique of ozone addition to an oxygen stream in a non-premixed counterflow model. The ignition and extinction limits of butane isomers’ cool flames have been investigated under a variety of strain rates. Results revealed that establishment of cool flames are favored at lower strain rates. Iso-butane was less reactive than n-butane by showing higher ignition and extinction limits. Ozone addition showed a significant influence on cool flame ignition and sustenance; it was found that increasing ozone concentration in the oxidizer stream dramatically increased the reactivity of both fuels. Results showed increased fuel reactivity as the temperature of the fuel stream outlet increased. 4 A numerical analysis was performed to simulate ignition and extinction of the cool flame in diffusive systems. The results revealed that ignition and extinction limits of cool flames are predominantly governed by LTC. The model qualitatively captured experimental trends for both fuels; however, it overpredicted both ignition and extinction limits under all strain rates and ozone concentrations. The discrepancies were within a factor of eight for the ignition limit and a factor of two for the extinction limit. Finally, sensitivity analyses were conducted to understand the reactions responsible for cool flames ignition. It was found that majority of the sensitive reactions are those that occur at low temperatures.

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Southeastern wildrye (Elymus glabriflorus (Vasey ex L.H. Dewey) Scrib & C.R. Ball) is a relatively new perennial cool-season grass that has shown potential as a forage crop in the Southeastern United States. However, there is a lack of research on this species assessing its agronomic performance. To assess the agronomic performance and it’s tolerance to imazapic field trials were established in Newton and Starkville, MS. A forage production trial included five nitrogen (N) 0, 56, 112, 168, and 224 kg N ha -1 (high input) and five annual clover (low input) treatments. Tolerance to imazapic was assessed with applications of four pre- and early post-emergent applications applied at 0.0, 0.35, 0.7, 0.105, and 0.14 kg ai ha -1. Results from both field trials combine to validate southeastern wildrye as a potential forage crop and continued research and development of agronomic traits in this species.

The present thesis is devoted to synthesis, through the environmentally friendly citrate sol-gel route, of YIn0.9O3 −ZnO near infrared reflective based pigments, having different chromophore elements (Mn, Cu, Fe), with the aim to add in binder and obtaining cool coatings. A “cool” coating for roofing consists of paint (or glaze) containing color pigments, which do not absorb the infrared portion of the solar spectrum. Cool coatings applied over buildings surface provide an effective solution for passive cooling of building indoors and influencing local outdoor microclimate, mitigating urban heat islands effect (UHIE). The primary purpose is to produce pigments according to an environmentally friendly route, using non-toxic raw materials, as well as short times and low temperatures for synthesis, and without residual waste. The resulting pigments must have high reflectance in the near-infrared so that they can be used in the field of cold paints. To realize the corresponding coatings, pigments were dispersed in two different binders (standard PMMA and industrial binder). For the most interesting pigments, in terms of NIR reflectance, other property, was decided to explore, which define these NIR reflective pigments as smart pigments for building application: the photocatalytic ability.

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No description available.

Yes / Following organ donation, bodies of children are generally cared for in hospital mortuaries or by funeral directors, and their families are offered little routine bereavement support. A partnership between an organ donation nursing team and regional children's hospice trialled an initiative where families were offered bereavement support from the hospice, and their child's body was cared for in a 'cool room' after death. Hospice services are usually restricted to children with life-limiting conditions, and their families. To explore the perceptions and experience of nursing staff who are involved in supporting families of children and young people who have been cared for in children's hospice cool rooms after death, following organ donation. A qualitative exploratory study consisting of a focus group interview with registered nurses from the children's hospice and organ donation teams. A purposeful sample of nurses was recruited. Data were collected in a digitally-recorded focus group interview during March 2018. The interview was transcribed and analysed using a qualitative content approach. Six nurses participated in the focus group. Analysis revealed five themes that characterised the perceptions of nurses: (i) barriers to care, (ii) bereavement care for families, (iii) impact on families and staff, (iv) influencers and enablers of change, and (v) sustainability of new practices. Nurses perceived the long-term, responsive and family-centred approach to bereavement support as a strength of the hospice model, reducing the experience of moral distress in organ donation nurses.

Dans les années 1990, le rock britannique revient sur le devant de la scène, porté par des groupes tels Blur, Oasis, Pulp et Suede, que la presse rassemble sous l'étiquette Britpop. Non contents de s'inspirer des grands groupes locaux des années 1960, comme les Beatles, ces musiciens se distinguent par une écriture et une image profondément ancrées dans leur propre identité britannique, et évoquent volontiers dans leurs chansons le mode de vie de la jeunesse comme la culture de la classe ouvrière. Cette renaissance sur les plans musical et culturel (participant au phénomène Cool Britannia) est contemporaine de la rénovation de l'idéologie et de l'image du Parti travailliste, qui devient New Labour sous la férule de Tony Blair, intéressé par la vision positive de la britannicité dépeinte par la Britpop. Dans la course aux élections législatives de 1997, le chef de l'opposition cherche à présenter son parti comme jeune et moderne, et se rapproche des acteurs de la scène rock de l'époque dans le but de courtiser l'électorat jeune qui fait défaut à la gauche depuis les années 1980. L'utilisation du rock en tant qu'outil de soutien politique pourrait néanmoins paraître contre-Nature à cause du rôle traditionnel de ce genre musical, lié aux sous-Cultures et mouvements contestataires. L'étude des excroissances du mouvement Britpop, visibles jusqu'à l'accession de Gordon Brown au poste de Premier ministre en 2007, permettra de dégager l'existence d'une veine critique et contestataire au sein de cette même scène rock, proposant une vision plus réaliste de la société, rappelant l'idée de Broken Britain mise en avant par les Conservateurs à cette époque. / In the 1990s, a string of successful bands such as Blur, Oasis, Pulp and Suede, inspired by glorious forefathers like the Beatles, revived the British rock genre. The press was quick to dub this new scene "Britpop", to describe the way these bands drew their inspiration from their own sense of Britishness, both in their appearance and in their lyrics, which documented several aspects of youth and working-Class cultures in Britain. Meanwhile, the Labour Party was undergoing a similar kind of rebirth under the influence of Tony Blair, who rebranded his party as New Labour. Since Britpop offered a positive, near-Patriotic vision of Britishness in line with the spirit of "Cool Britannia", Blair sought to obtain a very visible support from the Britpop scene in the run-Up to the 1997 general election. This was conceived as a way to help rejuvenate the Labour Party's image and to secure the youth vote which had eluded the left since the 1980s. However, the traditional view of rock music (as a type of protest music, prone to generating subcultures) hardly seems compatible with the idea that it could be used to support a mainstream political party. As the Britpop format went on to influence homegrown rock music into the next decade, with Gordon Brown succeeding Blair as Prime Minister in 2007, it seems several bands took British rock back to its primary, subversive function by painting a realistic picture of British society, closer to the concept of "Broken Britain" than to that of "Cool Britannia".