732 research outputs found
Towards developing support tools for sustainable control of gastrointestinal nematodes in sheep : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Veterinary Science at Massey University, Palmerston North, Manawatƫ, New Zealand
Gastrointestinal nematode (GIN) parasitism is a major animal health challenge for sheep. Parasitized animals typically display a number of clinical signs, including a reduction in voluntary feed intake, altered grazing behaviour and lethargy. The aim of this thesis was to use remote sensing technologies to advance the development of a methodology where early changes in animal behaviour can be used to help identify sheep suffering ill effects of GIN parasitism, especially in a pre-clinical situation. It was hypothesised that lambs with even modest worm burdens will be less active, graze for less time and spend more time resting than those herd mates that were less heavily parasitized.
The movement and behavioural activity of young and mature, infected and uninfected sheep were monitored in a series of studies using global positioning system (GPS) and tri-axial accelerometer sensors. Key behaviours were identified using machine learning techniques. Also assessed was the influence of host genotype on movement activity.
Accelerometry data accurately identified grazing, resting and walking activities of sheep. The sensors were able to identify the effects of GIN parasitism on movement and behaviour in sheep. Clear evidence was found that GIN were associated with reduced movement and overall activity in growing lambs, with reductions in time spent âgrazingâ and âwalkingâ occurring concomitantly with increases in ârestingâ activity, and before effects were recorded on growth rates. Host genotype also had an effect on movement activity of lambs in untreated sheep, but not in treated individuals. Adult sheep, however, showed no consistent changes in movement and behaviour associated with parasitism, as measured by faecal egg counts.
Overall, the findings in this thesis have demonstrated the potential value in remote monitoring of sheep as a diagnostic marker to detect the generally subtle behavioural changes associated with changing GIN infection status. Such monitoring could therefore be used as the basis for deciding whether animals need to be treated with anthelmintic on the basis of individual need, and such decisions could be taken early, i.e. before animals have failed to grow adequately or started to manifest more overt signs of clinical illness such as weight loss
Complex Dynamics in Fed-Batch Systems: Modeling, Analysis and Control of Alcoholic Fermentations
Modeling and control of fed-batch fermentation processes has been a subject of great interest to realize high productivity and yields from the fermentation technique. The goal of this dissertation was to gain insights into how the complex dynamic behaviors exhibited in fed-batch fermentation systems affect the stability of standard single-loop as well as non-standard feedback control structures. Novel PID stability theorems were established to help construct the controller stabilizing regions
Mean and fluctuating velocity contours and acoustic characteristics of subsonic and supersonic jets
Shadowgraph photographs of subsonic and supersonic jet
The Role of Marketing in Corporate Competitiveness: Marketing Practice Analysis of Hungarian Companies
The objective of this article is to analyse the marketing practice of Hungarian companies. On the one hand, the role of marketing function in the company has been revealed, and on the other hand the relationship between marketing efforts and market performance has been investigated. In frame of the Hungarian Competitiveness Studies, 300 marketing executives were surveyed to rate the marketing practice of their companies, concentrating on branding, pricing policy, applied marketing channels and promotional activities. The results confirm that sophisticated marketing practice leads to higher business performance.
Keywords: marketing tools, competitiveness, performanc
Hetkede killud : loov-praktiline lÔputöö
Loov-praktiline lĂ”putöö baseerub minu autorikontserdil âHetkede killudâ, kus Konguta Rahvamaja laulustuudio laululapsed, esitavad minu loodud laule. Repertuaar on stiililiselt varieeruv ning valikusse pÀÀsesid lood, mis on esitajatele eakohased ning kĂ”laliselt lauljatele sobilikud. Töö kirjalikus osas annan ĂŒlevaate oma muusikalistest Ă”pingutest ja tööst muusikaĂ”petajana, loov-praktilise lĂ”putöö kontserdikava ĂŒlesehitusest, repertuaarist ja selle metoodilisest analĂŒĂŒsist, ettevalmistusprotsessist ja kontserdi ettekandmisest.https://www.ester.ee/record=b5238147*es
Enseignement SupĂ©rieur Ă lâuniversitĂ© congolaise, Enseigner autrement : ici et maintenant!
La recherche en Educati
Science et sens commun⊠(A propos dâune Ă©tude ethnographique de lâindiscipline en classe)
Dans cet article, lâauteur offre le tĂ©moignage dâune dĂ©marche de recherche menĂ©e auprĂšs des Ă©lĂšves et des enseignants dâun Ă©tablissement scolaire qui, selon une approche ethnographique, sâest intĂ©ressĂ©e Ă lâĂ©tude de lâindiscipline en classe. DâaprĂšs lui, lâĂ©laboration dâun tĂ©moignage de ce genre est le retour Ă quelques enchantements, mais est aussi la rencontre avec certains doutes et maintes incertitudes. Le texte commence par exposer la construction de la problĂ©matique de lâenquĂȘte, puis explicite la conception et la mise en oeuvre du travail rĂ©alisĂ©, et conclut, en prĂ©sentant une rĂ©flexion sur la place et la nature de la thĂ©orisation dans ces Ă©tudes et sur la scientificitĂ© de la dĂ©marche de recherche
El uso de las ideas previas en el proceso de enseñanza -Aprendizaje de GeologĂa con tĂ©cnicos en MinerĂa
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