Dissertations / Theses on the topic 'Life fields'

This paper describes processes and subsequent conclusions after working collaboratively in the broad area of language learning. The inquiry process considered factors in the learning environment which might benefit the learners, with music and drawing in the classroom being trialled and discussed with teachers and adult migrant English learners in different contexts. The responses of some primary aged students with learning problems and their parents and/or teachers were also studied. The inquiry process indicated that the term 'environments' must be understood to include personal environment, involving the Life energy fields, considered here to be the physical field, and the field of thought and memory, as well as the cultural, family, educational and other significant environments, within the context of the evolving Australian society. The term the author has chosen to describe the interaction of these experiential fields with the will of the individual, is an etheric. Membership of, or exclusion from, an etheric, may be subtle but can be discerned when considering a migrant attempting to enter the Australian workforce or, any person trying to enter a new field of endeavour. The author suggests that this concept explores the phenomenon of acceptance of a language or entry into a group
Master of Science (Hons)

Soccer accounts for a third of the Swedish sports movement with 3 503 fields of both natural and artificial turf. The European Union will make a decision in 2021 on how to handle the issue of rubber performance infill. This infill can be found in artificial turf fields and are used for performance properties. The problem with this infill is the microplastics that spreads into the nature which is considered as toxic. Because of this the EU have decided to either ban or provide mandatory rules to reduce the spread of rubber performance infill. The north and the majority of Sweden’s climate is not adapted for play of soccer on natural turf according to FIFA, and EU want to ban or provide mandatory rules for artificial turfs. This action from the EU can perturb the entire Swedish sports movement since soccer accounts for a third of that movement. This study was therefore created to show if artificial turf fields are as bad for the environment as rumours has said compared with the natural turfs. To investigate this, a life cycle assessment (LCA) was performed regarding the global warming potential (GWP) and embodied water consumption for three different field types: an artificial turf field with recycled SBR, an artificial turf field with cork and a natural turf field. The result visualised that a natural turf field had the highest embodied water consumption and the highest impact on the GWP of a ten-year life cycle while the artificial turf field with recycled SBR had the least embodied water consumption and the least impact on the GWP. The findings of this LCA were that Sweden for the moment is dependent on artificial turf and the rubber performance infill, since the material properties are the best adapted to their climate. Therefore, a ban would be a risk for the Swedish sports movement. It was also revealed that natural turf fields in Sweden consumes at least 50 % municipal drinking water when irrigate. The high GWP impact came from the production of fertilisers (NPK). This report has shown how artificial turf and natural turf can work together in an industrial symbiosis by making the artificial turf field constructed to collect rainwater and use that water to irrigate the natural turf with.

This paper describes processes and subsequent conclusions after working collaboratively in the broad area of language learning. The inquiry process considered factors in the learning environment which might benefit the learners, with music and drawing in the classroom being trialled and discussed with teachers and adult migrant English learners in different contexts. The responses of some primary aged students with learning problems and their parents and/or teachers were also studied. The inquiry process indicated that the term 'environments' must be understood to include personal environment, involving the Life energy fields, considered here to be the physical field, and the field of thought and memory, as well as the cultural, family, educational and other significant environments, within the context of the evolving Australian society. The term the author has chosen to describe the interaction of these experiential fields with the will of the individual, is an etheric. Membership of, or exclusion from, an etheric, may be subtle but can be discerned when considering a migrant attempting to enter the Australian workforce or, any person trying to enter a new field of endeavour. The author suggests that this concept explores the phenomenon of acceptance of a language or entry into a group

The relationship between Texas Baptists and slavery is studied with an emphasis on the official statements made about the institution in denominational sources combined with a statistical analysis of the extent of slaveholding among Baptists. A data list of over 5,000 names was pared to 1100 names of Baptists in Texas prior to 1865 and then cross-referenced on slaveownership through the use of federal censuses and county tax rolls. Although Texas Baptists participated economically in the slave system, they always maintained that blacks were children of God worthy of religious instruction and salvation. The result of these disparate views was a paradox between treating slaves as chattels while welcoming them into mixed congregations and allowing them some measure of activity within those bodies. Attitudes expressed by white Baptists during the antebellum period were continued into the post-war years as well. Meanwhile, African-American Baptists gradually withdrew from white dominated congregations, forming their own local, regional, and state organizations. In the end, whites had no choice but to accept the new-found status of the Freedmen, cooperating with black institutions on occasion. Major sources for this study include church, associational, and state Baptist minutes; county and denominational histories; and government documents. The four appendices list associations, churches, and counties with extant records. Finally, private accounts of former slaves provide valuable insight into the interaction between white and black Baptists.

In this thesis I cover the theoretical framework and the practice based implications of bringing the fundamental principles of a cybernetic art educational strategy, the Groundcourse, which was developed and taught during the 1960’s in England by Roy Ascott, into the virtual, three dimensional builder’s world of the metaverse; to be implemented there as a non-institutional, voluntary, self-directed, adult oriented learning system for avatars – one which is expected to be taught by avatar instructors who will formulate the specifics of their curriculum and their methods based upon the cardinal tenets of the Groundcourse, which have been summarized by Roy Ascott as a flexible structure, “within which everything can find its place, and every individual his way,” which would give dimension and substance to the will to create and to change. In order to be able to set the groundwork for the adaptation of the Groundcourse’s principles to my model I have conducted literature reviews in experiential learning theories, with an emphasis on self-directed learning; as well as cybernetic learning. These I have combined with a survey of play theory and virtual world studies, particularly those focusing upon the avatar and metaverse creativity. From all of these I have woven together a foundation which I have combined with a visual documentation which may serve as case studies for my proposal. The new knowledge embodied through this thesis is a learning system for the creative fields that is designed specifically for the residents of online virtual worlds, and yet has its foundations in an earlier, well established and well regarded model.

The thesis answers the general question of whether the quality of artificially reared insect species should be based on performance tests for intended use or whether quality should be based on a more holistic biological approach. The empirical research is carried out using the lepidopteran leafroller 'Cnephasia' jactatana (Walker). The thesis defines biological performance and quality in terms of the success of an insect population in survival and reproduction and regards the laboratory environment as an artificial habitat that insects must colonise in order to survive and reproduce. Changes in biological performance that occurred during 12 successive generations of laboratory rearing were due to selection, acclimatisation and domestication and not adaptation. Artificial colonisation is theoretically successful within a limited range of environmental factors. As the inherent genetic variability of the founder population determines the resilience of the population to changes in performance, the ranges of environmental factors during colonisation should be wide to 'capture' much of the variability. Using body size (weight) as an aspect of overall quality, the thesis presents evidence that the final instar larva of C. jactatana has a threshold mechanism (larval critical weight, LCW) that determines pupal and adult size. There is a proportionate decrease in weight from the maximum weight that a larva attains in the final instar (LMW) to pupa ( described as constant DP ) and to adult (DA). There is a direct relation between the latent feeding period (period between attaining an LCW and LMW), LMW, pupal and adult size, and the reproductive performance (fecundity ). Within the experimental conditions diet quality, temperature, photoperiod and artificial selection had no effect on the larval critical weight, DP or DA, the larval threshold mechanism in C. jactatana is probably a mechanical trigger that initiates pupation. Diet quality, temperature and thermophotoperiods affected pupal size, adult size and reproductive performance. Photoperiod had no significant effects on size and reproductive performance. Positive assortative selections for slow development and low pupal weight significantly decreased pupal and adult size, and reproductive performance. Selection for fast development and heavy pupal weight for three generations had no significant effect on size or reproductive performance. Larval critical weight is demonstrated as useful to define quality indices and predict the performance of laboratory reared insects. The general conclusion of the thesis is that insect quality should be defined more in terms of the success in survival and colonising ability rather than solely on the success for 'intended role' or 'fitness for use'.

The role of individual soil microorganisms changes over the course of a plant's life - microorganisms that have no discernable role at one developmental stage may affect the plant later in its growth. Traditional analysis of the soil microbiome, which has focused principally on the relative abundances (RA) of individual organisms, may be incomplete, as underlying differences in population size cannot be addressed. We conducted a metagenomic analysis of soil microorganisms from various maize (Zea mays L.) fields at two depths, accompanied by crop yield components, to provide insight into influences of edaphic microbes on maize productivity under commercial maize production systems in Missouri. This study assesses the influence of fungi and bacteria, not only in terms of RA, but also in their estimated absolute abundances (EAA), derived by combining the results of Illumina HiSeq sequencing data and phospholipid fatty acid abundance data. Significant interactions were identified between maize yield components and soil microbes at critical developmental states. Most interactions between fungi and yield components were negative, with notable exceptions. Bacterial interactions were more complex, with most interactions during early ear development identified as positive, and most interactions during tasseling identified as negative. In addition to the effects that microbial populations have on yield, plant populations reciprocally changed the microbial community. Plant developmental state was the greatest predictor of bacteria, with the microbial communities present during the active growing season being most similar to each other, whereas the preplant microbiome and post-reproductive microbiome being most similar to each other. Fungal communities were primarily dependent on location.

Dans ce travail nous avons étudié le problème du rapport signal à bruit (RSB) en IRM à très bas champ magnétique et exploré des applications potentielles en utilisant du gaz 3He hyperpolarisé. Nous avons comparé deux méthodes d'élargissement de bande passante sans perte de RSB : une contre-réaction et un couplage inductif de la détection. Nous avons mis en œuvre la contre-réaction, plus appropriée à très bas champ. Des mesures d'atténuation par diffusion dans un gaz d'3He en géométrie cylindrique ont été faites par échos multiples de spin ou de gradient dans une large gamme de conditions correspondant à la diffusion dans les voies aériennes des poumons. Un bas champ permet d'utiliser des faibles gradients sur des durées longues, sans influence de la susceptibilité des matériaux. Nos mesures fournissent un ensemble de données destiné à une comparaison directe avec des modèles théoriques et d'autres résultats publiés. Une nouvelle séquence (Slow Low Angle Shot, SLASH) est proposée pour l'imagerie de gaz à bas champ. Des séries d'images à 2D dans des fantômes montrent qu'elle offre une résolution d'image et un RSB meilleurs que pour une séquence FLASH. Par ailleurs, des cartes de diffusion apparente dans des poumons fixés de petit animal ont été obtenues à partir d'images 2D et 3D. Les résultats sont compatibles avec ceux des mesures globales de diffusion par échos de spin dans ces mêmes poumons, et sont similaires aux résultats in vivo publiés. Ces poumons fixés sont donc un fantôme commode et pertinent pour des études méthodologiques. Les mesures de diffusion en bas champ, insensibles aux effets de susceptibilité, ont été faites sur une large gamme de temps de diffusion.

This thesis characterizes and interprets the nature of Exmoor’s late 3rd and early 2nd millennium BC landscapes, including an unusual array of ‘minilithic’ stone configurations. It develops a new theoretical framework using an ontology of assemblages, the concept of affectivity and perspectives on miniaturisation and scale, adopting a Deleuzian understanding of materiality. This promotes an exploration of the processes which led to the appearance, use and dispersal of archaeological entities as assemblages. It includes all forms of people’s interactions with materials, monuments, material culture (lithics) and landscapes; questioning the value of classificatory approaches and studying such themes as monumentality in isolation. The first detailed study of the lithic collections explores how the ontological significance of stone developed over millennia, leading to the emergence of upright stone configurations in the landscape. A detailed synthesis of the available archaeological evidence from excavation, survey, HER and museum datasets is then presented focusing on three case study zones, with entirely new interpretations developed for key sites at multiple scales. It then goes on to explore their wider relationships in terms of chronology, spatial placement, archaeological and landscape context. This is achieved through GIS analysis, original fieldwork (field visits, surveys, geophysics and excavation) and the synthesis and re-interpretation of secondary and archive data. The wider context of Exmoor is then briefly assessed, particularly drawing on evidence from Bodmin Moor. Tendencies to dismiss Exmoor as a poorer relation of such regions is challenged. Exmoor’s monuments challenge thinking on monumentality, particularly regarding the establishment of authority, through the choreography of space, movement and visibility. The miniliths had distinct affective qualities, with a unique capacity for frequent reconfiguration, quite different from megalithic sites elsewhere; yet many of the same practices are apparent. On Exmoor however, what people were doing with these practices was wholly different.

Llamas have provided, and continue to provide, fiber, meat, skins, fertilizer and transport for the Andean people. In addition, they are part of the traditional and religious culture of the Aymara and the Quechua. Both are currently unaware of the productive qualities of llamas, especially those related to meat production, which is the principle product responsible for generating greater income for farmers. For this reason, 554 llamas were evaluated from a total of 3,693 in 2005. The llamas came from T’olar and Pajonal grasslands in the Santiago de Machaca region of La Paz, Bolivia and represented males and females from four age categories (newborn, 1-2 years, juvenile, and adult). They were evaluated with the objective of determining the zoometric measurements of llamas fed on T’olar and Pajonal grasses. Evaluations were categorized according to gender and age group, while also applying descriptive statistics of zoometric measurements of llama anatomy including the head, neck, thorax, and abdomen regions, as well as height, weight, and fur thickness. The Pv measurement for T’olar fed llamas (64.4 kg) was higher than that of the Pajonal fed llamas (59.9 kg). With respect to gender, females (67.1 kg) were larger than males (53.0 kg). Adults were the largest age group (89.7 kg), followed by juveniles (85.9 kg), 1-2 years (58.7 kg) and newborns (34.1 kg). The T’olar llamas achieved better results than the Pajonal llamas. Furthermore, females were superior to males, most likely due to the large number of females as compared to males in the llamas. Zoometric measurements increased with age, generally reaching a statistically significant margin (P<0.01) between age groups. Growth was greatest between the newborn and juvenile groups but it ultimately slowed down afterwards.

Data assimilation in geophysical sciences aims at optimally estimating the state of the system or some parameters of the system's physical model. To do so, data assimilation needs three types of information: observations and background information, a physical/numerical model, and some statistical description that prescribes uncertainties to each componenent of the system.In my dissertation, new methodologies of data assimilation are used in atmospheric chemistry and physics: the joint use of a 4D-Var with a subgrid statistical model to consistently account for representativeness errors, accounting for multiple scale in the BLUE estimation principle, and a better estimation of prior errors using objective estimation of hyperparameters. These three approaches will be specifically applied to inverse modelling problems focussing on the emission fields of tracers or pollutants. First, in order to estimate the emission inventories of carbon monoxide over France, in-situ stations which are impacted by the representativeness errors are used. A subgrid model is introduced and coupled with a 4D-Var to reduce the representativeness error. Indeed, the results of inverse modelling showed that the 4D-Var routine was not fit to handle the representativeness issues. The coupled data assimilation system led to a much better representation of theCO concentration variability, with a significant improvement of statistical indicators, and more consistent estimation of the CO emission inventory. Second, the evaluation of the potential of the IMS (International Monitoring System) radionuclide network is performed for the inversion of an accidental source. In order to assess the performance of the global network, a multiscale adaptive grid is optimised using a criterion based on degrees of freedom for the signal (DFS). The results show that several specific regions remain poorly observed by the IMS network. Finally, the inversion of the surface fluxes of Volatile Organic Compounds (VOC) are carried out over Western Europe using EMEP stations. The uncertainties of the background values of the emissions, as well as the covariance matrix of the observation errors, are estimated according to the maximum likelihood principle. The prior probability density function of the control parameters is chosen to be Gaussian or semi-normal distributed. Grid-size emission inventories are inverted under these two statistical assumptions. The two kinds of approaches are compared. With the Gaussian assumption, the departure between the posterior and the prior emission inventories is higher than when using the semi-normal assumption, but that method does not provide better scores than the semi-normal in a forecast experiment.

As the pace of life in contemporary Western society accelerates, an increasing number of people are engaging in an alternative lifestyle: ‘Slow Living’. Although popular in the media, Slow Living, which addresses issues of quality of life, is a relatively new area of academic enquiry. Given a lack of empirical research, especially on the realities of the Slow Life in a New Zealand context, this ethnographic study aims to augment the knowledge on this lifestyle by focusing on how families experience Slow Living. The key research question is: How do families live their interpretations of a Slow Life? To answer this question, this study examined the everyday lives of five Slow Living families in Canterbury, New Zealand. Adult family members were given a time-use diary to complete over two days. These diaries were then used as a foundation for in-depth interviews and participant observation. Slow Living families hold to a number of personal values, such as personal agency, conscious living and leading meaningful lives. These comprise their ideal way of living. The families are also faced with a number of challenges and have to employ strategies to balance their ideal and what is possible. The different ways families adapt produces a variety of Slow Living lifestyles.

It is a conventional wisdom that since the start of the Chinese economic reform in 1978, the domestic saving structure in China has changed significantly. Previous studies of household saving in China (for example: Qian, 1988, Feltenstein et al, 1990, and Wakabayashi and Mackellar, 1999) have usually relied upon the Keynesian absolute-income hypothesis, Duesenberry’s relative-income hypothesis, and Friedman’s permanent-income hypothesis. This thesis uses the Modigliani-Brumberg life-cycle hypothesis to examine the determinants of household saving behavior in the Peoples’ Republic of China during the period 1978 to 2003. The research uses modern cointegration techniques to examine the impact on saving rates of economic growth, age dependency, wealth, the real interest rate, social security payments and unemployment (as a proxy for income uncertainty). Autoregressive distributed lag models are constructed and tested. The results find that economic growth, the real interest rate and social security payments have the expected effect with significant parameters; age dependency has the expected sign but in one model is not statistically significant; and that unemployment is not significant. The most surprising result is that increases in household wealth are associated with increased saving rates, which may help explain very high economic growth rates in China post 1978.

Changing characteristics of work and careers have resulted in a shift in perceptions of the potential value of entrepreneurial activity. In parallel there has emerged an appreciation of the non-economic impact of entrepreneurship on those who enact it. However, there still remains a limited understanding of the consequences of choosing to be an entrepreneur, and what that choice means in terms of that individual’s life and work. The potential for the young as a group to engage with entrepreneurship as a ‘career option’ is high, therefore the central research objective of this study was to learn what meaning young New Zealand entrepreneurs attach to ‘being in business’. The study was grounded in an inductive, interpretive research design, underpinned by the tenets of constructivism. Phenomenologically focussed, in-depth interviews were used to gather data from ten young New Zealand entrepreneurs. These interviews were semi-structured and emphasised language, meaning, and narrative. The resulting data were analysed using elements of a constructivist grounded theory approach. A key finding was that the nature of the relationship between the entrepreneurs and their firms was a strong attachment grounded in emotion. The intertwining of the life of the business with the life of the young entrepreneur was viewed positively, and frequently involved personal transformation. Businesses were more than mechanisms for achieving monetary wealth. The relationship between the young entrepreneurs and their work was also intense. Balance of work and life was not an issue, nor did they seek to differentiate between the two spheres. They were content to have the two blended in a manner of their choosing. Consistent with this was their drive for personal authenticity and adherence to strong ethical imperatives. Being an entrepreneur was less about career (and even less about a job) and more about fulfilling needs of a higher order. Almost all the participants strongly identified as entrepreneurs. They felt it was the identity most consistent with their values, attitudes, and aspirations. They accepted that in some instances the label small-firm owner manager was accurate in terms of the scale of their operations, but rejected its appropriateness on any other grounds.

Resilience is a term of increasing prevalence in many aspects of society including the workplace. This thesis has sought to examine the relationship resilience has with coping, engagement, and life satisfaction. Data was collected via a survey that included standard measures for the variables of interest and two open-ended questions targeting sources of stress and sources of satisfaction. Findings show a positive relationship between resilience and task-focused coping, engagement, and life satisfaction. No relationship was found between resilience and maladaptive coping or social support. Additionally, it was found that resilience acted as a full mediator in the relationship between task-focused coping and engagement, but had no mediating effect in the relationship between task-focused coping and life satisfaction. The open-ended questions identified that the same demand frequently acted as both a source of stress and a source of satisfaction.

The effect of a free-living stage in host-parasite coevolution: a skink mite phylogenetic study in New Zealand. During the last decade, phylogenetic trees have even been used to compare ecologically related taxa such as parasites and their hosts, and are used to determine their level of coevolution or reciprocal adaptation in time. Diverse coevolutionary events have been detected for this ecological association, where generally the parasite has been regarded as one that feeds exclusively on the host and is likely to cospeciate with it. A different coevolutionary pattern might occur when the parasite has a free-living stage in its life cycle, in which the parasite may have the opportunity to abandon its host and successfully colonise a new species (host-switching) making cospeciation less likely. Many New Zealand skinks are infested with a parasitic mite, Odontacarus sp. (Prostigmata: Leeuwenhoekiidae), which becomes free-living as an adult. The genetic variation of these mites found on four hosts was analyzed for host- parasite coevolutionary events. The hosts were the McCann’s skink and the common skink in coastal Birdling Flat, Canterbury, plus these species and the Grand and Otago skinks in Macraes Flat, Central Otago, South Island, New Zealand. The genetic variation of fast evolving nuclear Internal Transcribed Spacers 2 and mitochondrial Cytochrome c Oxidase I in Odontacarus mites found on these hosts was determined by PCR and DNA sequencing and phylogenetic trees were built using the computer programs PAUP*4 and MrBayes 3. The results show that mite haplotypes only had a significant geographical division and no host-related differences. In Birdling Flat, the COI haplotypes were represented in two groups that infested both regional hosts and had 5.7 % divergence. The same individual mites belonged to a single ITS 2 haplotype, thus indicating a historical geographical division between two populations that now interbreed successfully. The Macraes Flat mites were divided into two COI haplotypes with 2.4% divergence and internal nodes, which showed greater genetic variability than the Birdling Flat populations. The Macraes Flat mites formed two ITS 2 haplotypes with 6% divergence. This greater geographical structure of the Otago mites is probably due to the older age of the mainland area compared to the recently exposed coastal locality of Birdling Flat. The COI haplotypes from the two different regions had a mean distance of 15.5%, with an earlier divergence time than that known for the hosts. For both genes, the haplotypes from different regions had 100% bootstrap support and the parasite showed no host specificity. Mites of the different COI and ITS haplotypes were found on most of the host species that were sampled in Canterbury and Otago. The results of this study suggest that a free-living stage in a parasite’s life cycle can favour coevolutionary events such as inertia (failure to speciate) and host-switching, probably as a result of resource-tracking of the parasite. NB: Electronic files contained on CD to accompany print copy are not included with this version of the thesis.

It has been frequently mentioned that Colombia is a \"megadiverse\" country, containing a larger number of species than other countries, some of which with much larger territories. However, very few people know what this means and about the benefits that can be obtained from that high diversity, with its proper exploration. One of the benefits refers to the sustainable use of biological resources. Colombia can take advantage of the discovery, conservation or production, and commercialization of species that serve as biological control agents of species that harm certain economic activities. Applied biological control involves the possibility to exploit native biodiversity in the form of conservation or biocommerce for use in activities such as agriculture and livestock. Thus, the studies composing this thesis aimed at initiating the recognition of the richness of predatory mites in the soil of the major rose-producing region of the country, and the evaluation of potential representative predators for use in the management of thrips, the most important pest group on rose cultivation in Colombia. Chapter 1 addressed the importance of the crop, the pest groups and the possible natural enemies to be found in Colombia. In Chapter 2, the results of a general survey of the soil mites in four rose fields in greenhouses during one year and a half was presented. Additionally, the population dynamics of soil the mites and thrips was studied, relating the variation in population levels with environmental factors, including climatic and soil factors. Knowing the variation of populations over time under the usual conditions of crop management can help to understand how a predator can respond in the field when used in pest management programs. To complement those data, especially in what refers to the evaluation of the native fauna, surveys were carried out on patches of secondary vegetation located near two of the rose fields, in a rose field in another area and a patch of secondary vegetation nearby, and in two more extensive and less disturbed patches of the Bogota plateau. With this work, it was possible to verify the great richness of species of soil non-Uropodina Mesostigmata found in the soil of the Bogotá plateau. Only representative mites of the cohort Cercomegistina of the suborder Trigynaspida and of the cohort Gamasina of the suborder Monogynaspida were found. As expected, species and dominant families resemble those reported in temperate areas, given the similar climatic conditions. Both densities and number of species are lower in rose fields than in secondary vegetation patches nearby, which also was expected from the much more uniform ecosystem in rose fields. Additionally, the exclusive presence of some species in rose fields suggests either the introduction of those species with material related to the cultivation system or a drastic change in faunistic composition, turning rare field species abundant in rose fields because of the cultivation system. The variation in densities and presence of species was shown to be more related to soil, especially organic matter and pH, than to climatic characteristics. Therefore, patches of secondary vegetation, whose soils had higher content of organic matter, are more similar to each other, in terms of composition of species, than to the nearby rose fields. The results of the Chapter 2 indicated the need for morphological and taxonomic studies of several of the species found, either because of the poorly detailed descriptions currently available or because of the recognition of new species for science. Thus, in Chapters 3 and 4, the morphological characterization and the description of some of the new species found in the Ascidae, Blattisociidae and Melicharidae (Chapter 3) and Laelapidae (Chapter 4) were presented. It was also observed that many of the previously described species found in this study also need similar studies to be conducted in the future. However, through these two chapters, initial steps were taken to contribute to the recognition of scarcely known mites groups in Colombia to facilitate future ecological studies and the use of those species in pest management programs. The results of Chapter 2 also served as base to select species to be considered in an initial evaluation of the potential of members of the Colombian mesostigmatic fauna as control agents of Frankliniella occidentalis (Pergander), the most numerous thrips species found in this study. Two of the most frequently found predator species, Gaeolaelaps aculeifer (Canestrini) and Parasitus bituberosus Karg, were selected to carry out the second part of this work, whose results were presented in Chapters 5 and 6, respectively. For each predator, the study consisted of the evaluation the predation capacity on F. occidentalis, the oviposition rates on this and other prey species, and of the determination of their life table parameters. Gaeolaelaps aculeifer is presently used in other countries for the control of different pests including thrips. The results showed that both predators are able to feed and reproduce when pre-pupae and pupae of F. occidentalis were part of their diets. The biological characteristics of the Colombian population of G. aculeifer are comparable to those reported for other populations of the same predator, suggesting its potential for use to control F. occidentalis in Colombia. Although the presence of a complementary prey (Aleuroglyphus ovatus (Troupeau)) in the system led to a small reduction of its predation rate of F. occidentalis pre-pupae and pupae, the results show that A. ovatus can be used as factitious food for mass rearing or as complementary food in periodic releases, when the pest in not abundant. It was shown that P. bituberosus deutonymph needs a stimulus for the emergence of adults, which, in this case, was the pairing with a mite of the opposite sex. Nematodes are not only necessary in the diet in the immature stage of this predator, but also improve its performance, as indicated by the higher fecundity and the net and intrinsic reproductive rates on this prey. The results indicated as warranted the conduction of larger scale investigations on the possible use of G. aculeifer and P. bituberosus for thrips control, by periodic releases, as well as the evaluation of other predator species found less frequently. Larger-scale evaluations would initially consist of experiments in pots and later on at the semi-field and field conditions. Results of the relation between predator density and environmental factors also suggest to be important the conduction of studies to evaluate the possibility to increase predator performance by increasing the level of soil organic matter content or pH level.
Tem sido freqüentemente mencionado que a Colômbia é um país \"megadiverso\", contendo um número maior de espécies que outros países, alguns dos quais com territórios muito mais extensos. No entanto, poucos sabem o que isso significa e os benefícios que podem ser obtidos dessa alta diversidade, com sua exploração adequada. Um dos benefícios refere-se ao uso sustentável de recursos biológicos. A Colômbia pode aproveitar a descoberta, a conservação ou a produção e a comercialização de espécies que servem como agentes de controle biológico de espécies que prejudicam certas atividades econômicas. O controle biológico aplicado envolve a possibilidade de explorar a biodiversidade nativa na forma de conservação ou biocomércio para uso em atividades como agricultura e pecuária. Assim, os estudos que compõem esta tese visam a iniciar o reconhecimento da riqueza de ácaros predadores no solo da região produtora de roseiras da Colômbia, e a avaliação de potenciais predadores representativos para uso no manejo de tripes, o mais importante grupo de pragas no cultivo de rosas na Colômbia. O Capítulo 1 abordou a importância da cultura, dos grupos de pragas e dos possíveis inimigos naturais encontrados na Colômbia. No Capítulo 2, os resultados de um levantamento geral dos ácaros de solo em quatro campos de cultivo de rosas em estufas durante um ano e meio foram apresentados. Além disso, a dinâmica populacional de ácaros e tripes no solo foi estudada, relacionando a variação nos níveis populacionais com fatores ambientais, incluindo fatores climáticos e do solo. Conhecendo a variação das populações ao longo do tempo sob as condições usuais de manejo de culturas pode ajudar a entender como um predador pode responder no campo quando usado em programas de controle de pragas. Para complementar esses dados, especialmente no que se refere à avaliação da fauna nativa, foram realizados levantamentos em fragmentos de vegetação secundária localizados próximos a dois dos campos de cultivo de rosas, num cultivo de rosa em outra área e um fragmento de vegetação secundária nas proximidades, e em dois fragmentos mais extensos e menos perturbados do planalto de Bogotá. Com este trabalho, foi possível verificar a grande riqueza de espécies de ácaros Mesostigmata (não incluindo os Uropodina) encontradas no solo do planalto de Bogotá. Apenas ácaros representativos da coorte Cercomegistina da subordem Trigynaspida e da coorte Gamasina da subordem Monogynaspida foram encontrados. Como esperado, espécies e famílias dominantes se assemelham aos grupos relatados em áreas temperadas, dadas as condições climáticas semelhantes. Tanto as densidades quanto o número de espécies são menores nos campos de cultivo de rosas do que nos fragmentos de vegetação secundária próximos, o que também era esperado tendo em vista o ecossistema muito mais uniforme nos campos cultivo de rosas. Além disso, a presença exclusiva de algumas espécies nestes campos sugere que estas tenham sido introduzidas com material relacionado ao sistema de cultivo ou que tenha havido uma mudança drástica na composição faunística, tornando abundantes em campos de cultivo de rosas as espécies que são raras na vegetação secundária, devido às características do sistema de cultivo. A variação nas densidades e presença de espécies mostaram-se mais relacionadas às características do solo, especialmente níveis de matéria orgânica e pH, do que às características climáticas. Portanto, fragmentos da vegetação secundária, cujos solos tinham maior conteúdo de matéria orgânica, são mais semelhantes entre si, em termos de composição das espécies, do que aos campos de rosas próximos. Os resultados do Capítulo 2 indicaram a necessidade de estudos morfológicos e taxonômicos de várias das espécies encontradas, pelas descrições pouco detalhadas atualmente disponíveis ou pelo reconhecimento da ocorrência de espécies novas para a ciência. Assim, nos Capítulos 3 e 4, uma caracterização morfológica e a descrição de algumas das espécies novas encontradas em Ascidae, Blattisociidae e Melicharidae (Capítulo 3) e Laelapidae (Capítulo 4) foram apresentadas. Também foi observado que muitas das espécies descritas anteriormente e encontradas neste estudo necessitam de estudos semelhantes, a serem realizados no futuro. No entanto, através destes dois capítulos, os passos iniciais foram dados, para contribuir para o reconhecimento de grupos de ácaros pouco conhecidos na Colômbia, para facilitar futuros estudos ecológicos e o uso destas espécies em programas de controle de pragas. Os resultados do Capítulo 2 também serviram como base para a seleção de espécies a serem consideradas em uma avaliação inicial do potencial de membros da fauna mesostigmática colombiana como agentes de controle de Frankliniella occidentalis (Pergander), a espécie mais numerosa de tripes encontrada neste estudo. Duas das espécies de predadores mais encontradas, Gaeolaelaps aculeifer (Canestrini) e Parasitus bituberosus Karg, foram selecionadas para realizar a segunda parte deste trabalho, cujos resultados foram apresentados nos Capítulos 5 e 6, respectivamente. Para cada predador, o estudo consistiu na avaliação da capacidade de predação em F. occidentalis e das taxas de oviposição quando alimentando-se desta e de outras presas, assim como na determinação dos parâmetros de sua tabela de vida. Gaeolaelaps aculeifer é atualmente usado em outros países para o controle de diferentes pragas, incluindo tripes. Os resultados mostraram que ambos os predadores são capazes de se alimentar e se reproduzir quando pré-pupas e pupas de F. occidentalis fazem parte de suas dietas. As características biológicas da população colombiana de G. aculeifer são comparáveis àquelas relatadas para outras populações do mesmo predador, sugerindo seu potencial para uso no controle de F. occidentalis na Colômbia. Embora a presença de uma presa complementar (Aleuroglyphus ovatus (Troupeau)) no sistema tenha levado a uma pequena redução de sua taxa de predação de pupas e pupas de F. occidentalis, observou-se que A. ovatus pode ser usado como alimento factício para a criação massal ou como alimento complementar em liberações periódicas, quando a praga não seja suficientemente abundante para manter a população deste predador. Foi demonstrado que a deutoninfa de P. bituberosus precisa de um estímulo para a emergência dos adultos, que, neste caso correspondeu ao seu pareamento com um ácaro do sexo oposto. Os nematoides não apenas são necessários na dieta na fase imatura desse predador, mas também melhoram seu desempenho, como indicado pela maior fecundidade e pelas taxa liquida de reproducao e capacidade innata de aumentar em numero dessa presa. Os resultados indicaram como justificável a realização de estudos em maior escala sobre o possível uso de G. aculeifer e P. bituberosus no controle de tripes, por meio de liberações periódicas, bem como a avaliação de outras espécies predadoras encontradas com menor frequência. As avaliações em larga escala consistiriam inicialmente em experimentos em vasos e, posteriormente, em semi-campo e campo. Os resultados da relação entre densidade de predadores e fatores ambientais também sugerem ser importante a realização de estudos que avaliem a possibilidade de aumentar o desempenho dos predadores, aumentando o nível de matéria orgânica do solo ou o pH.

The study explored the relationship between retirement and marital status and objective and subjective measures of social support. A secondary analysis was conducted on a sample of 6,662 men and women aged 55-70 years of age. Results of a series of 2-way ANOVAs revealed greater interaction with friends amongst retired individuals than those who were employed. Marital status was shown to be associated with interaction with family and levels of perceived social support. An interaction between retirement and marital status was also shown to influence levels of perceived social support. The results reveal that retirement and marital status have an individual and interaction effect on various measures of social support and indicate the importance of considering marital status when researching, educating and working with issues regarding retirement and social support.

Eleven male and 10 female freelance production workers were interviewed about their experiences of life within the New Zealand film industry. Respondents’ accounts contrast sharply with glamorous images of the industry portrayed in the media. Respondents enjoyed the creative challenges, camaraderie, excitement, and intensity of their working lives and identified strongly with their work. However, they also experienced continual financial insecurity, unpredictable and demoralising periods of unemployment, and recurrent problems maintaining a reasonable work-life balance. Many of the older respondents cited these factors as their main reason for attempting to find work outside the industry. Female production workers appeared to pay a particularly high price for their involvement in the industry and often sacrificed other areas of their lives for their careers. Women frequently compensated for this imbalance by becoming even more career focussed, thus compounding the problems in non-work areas of their lives. Respondents’ accounts are interpreted in relation to current structural conditions, working practices, and power imbalances within the New Zealand film industry. It is argued that freelance production workers’ complex psychological relationship with their work is simultaneously a product of their work environment and helps to perpetuate industry conditions which disadvantage the workforce.

Rural experiences are under-represented in the end-of-life care literature. In addition, population projections indicate that the numbers of older rural people are increasing. In an attempt to better understand their needs, this study considers how older people experience end-of-life (EOL) care in a rural New Zealand setting. Having responded to local media and community notices, seven participants, who in the last eighteen months had cared for someone over the age of 65 with a terminal illness, spoke about their experience of rural EOL care. Their stories were then transcribed and analysed, using narrative analysis. Participants spoke about similar issues, but from different, sometimes conflicting, perspectives. Positioning themselves primarily as carers, rather than as rural people, the participants’ stories nevertheless reflected their social location for caring, as they talked about exhaustion and needing 24 hour support; limited access to specialist palliative care services; and the difficulties of caring for people with complex needs. At the same time they spoke of the joys and rewards of caring. The ambivalence and conflict evident in the stories indicates the participants’ location in a particular place and time in the history of dying. Caught between two paradigms of care, these participants vacillate between the desire for the empathic, compassionate care of yesteryear and the best that modern medical technology can offer. Discussing when to continue and when to stop medical intervention produced the most conflicting perspectives. However, all agreed that having time to form therapeutic relationships is a key component of EOL care. Overall, the stories demonstrate that the multiple and complex experiences of older rural people render stereotypical assumptions about rural life and dying at home problematic. However, as this study demonstrates, simply talking with people provides access to and understanding of their lived realities. Incorporating this kind of approach in future rural EOL care planning will move us closer to achieving contemporary goals of positive ageing and dying well.

Te Ora Ē noho anā nō i te koko ko Ōhiwa, kia whakarongo rua, Aku taringa ki te Tai o tuarā e o Kanawa, E āki ana mai ki uta r o Ōhakana. Ki te whānau a Tairongo, Kai Tāuwhare rā ko te kopua-o-te ururoa, Ko te kai rāria noa mai te raweketia e te ringaringa, Me whakarangi-pūkohu e au ki Tītītangi ao ki te Te Aitanga-ā-Wheturoa, Kia whītikiria taku hope ki te maurea whiritoi, Kia noho au ki Puhi-nui tonu ki Te Maungarongo a Te Rangiāniwaniwa, Ka mawhiti tonu rā taku haere ki ngā tihi tapu ki Maungapōhatu kia Taiturakina; Kia titiro iho au ki Ruatāhuna ki Manawarū ē ko Te Aitanga-ā-Tūhoe.... Ko te hua o te wānanga o a Tūhoe kōrero tuku iho hāngai ki ana waiata tawhito te pūtake o tēnei tuhinga roa kia auhi noa mai te wairua o ngā tūtakinga kōrero kia riro ko ēnei kōrero tuku iho hei matua hikihiki, whakataratara i te hinengaro, i te wairua, e mau ai tēnei o ngā whare whakairo kōrero o te hua o te wānanga a Tūhoe. Kia kaiaohia aua kōrero ki te ura mai o te motu ki runga i ngā pae maunga o Huiarau tau iho ki a tātau e pōkai kaha nei, e tau awhi nei ki runga i te mata o tēnei whenua ātaahua. Ka paenga rā ngā tau ka kitea, ka rangona tēnā pu kōrero, tēnā whare whakairo kōrero, whakairo waiata. Mea rawa ake kua whakangaro atu ki te tira e tauwhare mai rā. Hika rawa ake, kua mawhiti kē te haere ki te mākau nui o te iwi e tīraha mai rā, tē whakaaratia! Kia rangona, kia kitea noa e tātau te mata kōrero kia eke rā ki runga, taihoa rawa ēnei taonga e ngaro, taihoa rawa nei taonga e haukotia. Ka huri whakauta ki te hua o te wānanga, ko te waiata tawhito tēnā, ko te momo rerenga kōrero i hua mai ai i roto i ngā noho tahitanga a te tangata. He kupu ēnei hei whakaata i te hinengaro, wairua, te taiao, ngā rākau, te wai, te moana, ngā whetu, te whenua, ngā pakanga, te kawa o te marae, te noho tahitanga a ngā tūākana\tāina\tuāhine. Te reo o mātua, o kuia, koroua, ngā kaipupuri i te ahi kā roa o te wā kāinga. Inā hoki ko nga āhuatanga o te tangata tēnā tōna hanga, tōna whakatipu, ōna whakaaro, tōna ngākau, tōna wairua, me ngā momo hāhi i tipu ake ai te pono, ka titiro iho te tika i te rangi ka oti nei he waiata e tipuria ai te hua o te wānanga ki roto i a tātau katoa. Waihoki ko aua waiata nei te ahi whakakā roa o te ngākau,kei kona ōna timatatanga, engari kāore nei ōna whakamutunga. Ka pikitia ake te toi huarewa kia kite noa atu i te kaha o te whakaaro. Ko te wāhanga nui ia kia hapaina tēnei tuhinga roa, hei whakaoho, hei tuku, hei tātari i ngā whiriwhiringa kōrero ā-tuhi, ā-wāha kei roto i te whare kōrero o te whānau, hapū, iwi e timata ai, e mau ai te hua o te wānanga o te whaitua whenua. Tae atu ki ngā takahanga whakaewa ka oti nei he waiata tawhito hei kaiarataki ki ngā tihi maunga o te whakaaro. Ko te kapunga whakaaro ko te whātoro, i te tātari i te kupu, ki te whakamārama i te hua o te wānanga hei tumu whakarae kōhikohi mōhiotanga ki runga, ki raro ki ngā tai timu o te hua o te wānanga. I roto i tēnei tuhinga roa ka takea mai te wānanga i te kore, i te pō, i te ao mārama e tohea ai ngā kete e toru o te wānanga hei anga tohutohu, piki tūranga whakaakoranga ki hea mai nei! Mai i roto i aua kete ka nanahu te hinengaro kōkoi o tātau tīpuna mai anō i te ao Māori. Ko te ao mārama tēnā, ko te ao whenua tēnā, ko ngā pakanga tēnā, ko ngā tinihanga ēnā, ko te apakura, ko te hakamomori ka hua nei te wānanga. Nō reira he mahi, he kaupapa nui tā tēnei tuhinga roa ki te whakakao mai i ngā waiata e mohio ana tātau hei papa kōrero, hei wānanga mā te hunga kei te piki ake i ngā takutai moana o te whakaaro, o tēnei ao e wehi mai nei ki a tātau. Kāre e mihi kei te hopo te iwi, te hunga mau i ēnei waiata ki runga i o tātau marae kei ngaro memeha noa ēnei taonga a tātau. Ae! Kei te tika tā rātau hopo. Inā hoki kua riro kē te reo whakaarorangi i te oro o te waiata i ngā tai nenehawa, whakapōrearea e hukahuka mai nei. Ahakoa tēnei kei te whakaara ake ēnei waiata i runga tonu i te kaha o tēna, o tēna ki te whakaara. Kei te tahuri nui mai te hunga rangatahi, taiohi ki ēnei waiata koia tēnei te tūmatanui o tēnei tuhinga roa, hei tāhu whakaea mo te hinengaro, mo te ngākau o aua whakatipuranga e hiahia nei rātau ki ēnei taonga. Mā te karakia hei waere te whenua, mā te taki i ngā kōrero mo ngā atuā te whakataukī, te whakapepeha ka pupuke mai te hihiri o te mahara i ō tātau tipuna kōkoi e whakakitea nei tātau i ēnei rā ki aua tohu. Ka huia rnai aua pitopito kōrero katoa hei kākahu maeneene ki roto i te kupu o te waiata tawhito, kā mau. He whakaatu tēnei tuhinga roa kei te ora tēnei o ngā momo whare pupuri kōrero i te pū; i te more, te weu me ngā pātaka iringa kōrero o te ao ō Tūhoe ō neherā, tae noa mai ki ēnei rā. Kāti he wā anō i roto i taua ora ka tōia te whakaaro ō Tūhoe, ō te Māori e tauiwi hei tinihanga māna. Engari e kitea ai i roto i tēnei tuhinga roa, ko te toki hei kaupare atu i taua tinihanga ko te kōrero i tuarātia rā: 'Hokia ki o maunga kia purea koe e ngā hau o Tāwhirimātea' Koia tēnā te kaupapa o tēnei tuhinga roa he tātari i te hānuitanga, te taiwhakatū o taua kōrero: Hokia ki o maunga... Ma taua kōrero Hokia ki o maunga ... ka rangona te mātaotao o te hua o te wānanga o te pakanga o te whenua, o ngā pikikōtuku i tukitukia, kātahi ka kōrero ai ki roto i tā Tūhoe whakatau i ana whakaaro, e taea ai te ruruku ka puea ake. Koia tēnei ko te mana i roto i ngā whakatakotoranga kōrero e mau ai te kurataininihi, te kurataiwawana o te whakaaro. He hua wānanga tēnei e whakaatungia ai e te hinengaro ngā takahanga motuhake, me te hāngai o ā rātau kupu mo ngā whakaaro e tau nei ki tēnei Ao Hurihuri. Nā ngā mahi a ō tātau tīpuna, te para i te huarahi kia takahuritia ai ngā mahi kikino o te riri Pākehā i tū ake ai ngā poropiti o aua tau kikino i rnurua ai ngā whenua, i tukua ai te iwi ki raro. I tū ake ai rātau te hunga poropiti ki te rapu i te ora i te kaupapa tōrangapū mo ngā whenua i hahanitia. Mai i ēnei kaupapa ka hau te rongo o te waiata tawhito hei tūāpapa whakaohooho, whakanekeneke i a tātau katoa, ahakoa ko wai. Whā tekau katoa ngā waiata o tēnei tuhinga roa rnai i tēnā kokona o Tūhoe, rnai i tēnā kokona o Tūhoe e kawe ana i te hua wānanga hei whakaata, hei kōwhiri i te hunga i kaha i rnau tonu te ngangahau i ngā totohe kōrero, totohe tangata, totohe whenua. I kona ka hua te wānanga ka tohea te riri ka mau, i ea ai tētahi wāhi o te mamae. Koia tēnei ko te whakaatu i te kaha o te tohe i te pō, i te awatea. Ko te kawa o te marae te ātamira whakatāhu, tuku i aua hua wānanga i nei rā e rangona ai te kōrero ā-iwi, te hī o te mita o te reo waiata hei hokinga atu ki te nohoanga o te kupu. Ko tētahi anō kaupapa o tēnei tuhinga roa he whakahoki mai anō i te rnatapihi o Matariki, kia meinga ai ki te kairangi o te kawa o te marae, ka tau ki te whenua i maringi ai te toto. Ko ēnei hua wānanga te oro o te ngākau o Te Ūrewera, te whītiki o te kī mo te tuakiri mo tēnā whakatipuranga, rno tēnā whakatipuranga. Ae! Mā te hua wānanga a Tūhoe e whakaea te mamae e puta ai te pātai. Ko wai rā au? I ahu mai taku wānanga i whea? E ahu ana au ki whea? No te rā nei kua riro mā tēnei tuhinga roa e whakaatu ētahi o ngā hau kikino i whakawhiua kirunga i te iwi e te kāwanatanga i a ia e āki mai ana mo ngā rawa a te iwi, hei tuku he tangatakē. Nō reira i tikina ai te tauparapara a Te Kapo o te Rangi hei whakatauira i te takenga mai ongā kōrero mai i te koko ki Ōhiwa ki te pō, ki te pouri, ki te ao mārama. 'Hokia ki maunga' ko te tangata, ko te iwi, ko te hapū, ko te whānau te tīmatanga o te hua o te wānanga. Koia tēnei tētahi anō kaupapa o tēnei tuhinga roa, he āhuru i aua pukenga tautōhito kōrero kia mau te rangi, kia mau te hā, kia rangona te hua wānanga, oho ake ki te ao ka oti nei he waiata tawhito hei hoa haere whakamua. Ko te kōpae o te whare tēnā e tautokona ana hoki te ahu whakamuatanga o ngā mōrehu kōrero e arohatia nei e tātau. He huarahi atu tēnei hei āwhina, hei tohu i te kei o te waka ki ngā ngaru kokoti e pukepuke rnai nei. Ko te whakapae o tēnei tuhinga roa e titikaha ai ki te hinengaro o Tūhoe me mau ana momo kōrero ki ngā momo hangarau o tēnei ao hurihuri kā tika. Kua roa ēnei taonga e ārikarika ana hei whakarei i te kupu kōrero ki te hunga mate, ki te tira e tatari rnai rā i te waharoa o te marae ki te whakaeke. Kei roto i te wairua o tēnei mahi ka tukua āianei ēnei taonga kia kore ai tātau e taka ki roto i te korekore o te hinengaro, hei whakamahi mā te tamaiti o Tūhoe e hiki ake nei i ngā pae tata, i ngā pae tawhiti. Ko tēnei tuhinga roa te kura kimihia o te ura rnai o te motu i tua atu o Huiarau. Kia hau ai te rongo o a tāitau kōrero ki mua i a tātau hei homai i te aroha kia au ai te matatū tonu, ka maranga kei runga. Kia taria te roanga o te kōrero. Ae! Me hoki rā kā tika: Kā hoki nei au ki te mauri o taku waka a Mātaatua Ko Pūtauaki ki a Ngāti Awa Ko Tāwhiuau, ko Tangiharuru Ko te rae rā o Kohi ki a Awatope Ko Mānuka tūtahi ki Whakatāne, kia Apanui Ko te mauri haria mai nei hei whakaoho i taku moe Ē kō kō ia e ara ē!

There is anecdotal evidence that populations of the New Zealand endemic red admiral butterfly Bassaris gonerilla (F.) have declined since the early 1900s. This decline has been associated with the introduction of the generalist pupal parasitoids Pteromalus puparum (L.) and Echthromorpha intricatoria (F.). The former was deliberately introduced for the biological control of the cabbage white butterfly (Pieris rapae (L.)); the latter is an adventitious arrival from Australia. The objective of this thesis was to quantify, using population models, the effect that P. puparum is having on B. gonerilla abundance. Population monitoring and a phenology model (based on temperature-related development rates) indicated that B. gonerilla has two full generations and one partial generation per summer in the Banks Peninsula region of New Zealand. B. gonerilla abundance was greatly reduced in drought summers, which was probably due to the negative effects of drought on the quality and quantity of the larval host plant Urtica ferox Forst. A life table study showed that egg parasitism by the unidentified scelionid Telenomus sp. was the largest mortality factor for the pre-imaginal stages of B. gonerilla, followed by "disappearance" mortality (predation and dispersal) in the larval stages. Pupal mortality due to P. puparum was lower compared with that caused by E. intricatoria, with 1-19% and 20-30% of pupae being parasitised by P. puparum and E. intricatoria, respectively. Collection of B. gonerilla pupae from the Christchurch, Dunedin and Wellington areas confirmed higher rates of percentage parasitism by E. intricatoria. B. gonerilla collected from the Banks Peninsula had a 50: 50 sex ratio and lifetime fecundity was estimated in the laboratory as 312 eggs per female. There was no evidence of density-dependent parasitism of B. gonerilla pupae by P. puparum in the field, although there was a significant positive relationship between life table estimates of E. intricatoria parasitism and B. gonerilla pupal abundance. Larval dispersal from the host plant showed a positive relationship with larval instar but no relationship with larval density. Rates of change in B. gonerilla adult abundance between generations within a year showed evidence of density dependence, and this negative feedback was stronger in a drought year. A discrete-time model for B. gonerilla population dynamics was constructed which had two summer generations per year and a partial overwintering generation. The model showed that the presence of this overwintering generation provides a temporal refuge from high levels of E. intricatoria parasitism. Removal of parasitoid mortality from the model suggested that P. puparum was suppressing B. Gonerilla populations on the Banks Peninsula by 5% and E. intricatoria by 30%. An important assumption of the model was that parasitism rates were independent of B. gonerilla density. This assumption appears valid for P. puparum parasitism, but may not be valid for E. intricatoria; therefore the estimated suppression levels due to this adventive parasitoid should be viewed with some caution. It is too soon to generalise on what determines the magnitude of non-target effects by arthropod biocontrol agents, this being only the second study to quantify effects at a population level. However, in this case retrospective analysis has shown that the impact of non-target parasitism by P. puparum on B. gonerilla abundance has been small. There is anecdotal evidence that populations of the New Zealand endemic red admiral butterfly Bassaris gonerilla (F.) have declined since the early 1900s. This decline has been associated with the introduction of the generalist pupal parasitoids Pteromalus puparum (L.) and Echthromorpha intricatoria (F.). The former was deliberately introduced for the biological control of the cabbage white butterfly (Pieris rapae (L.)); the latter is an adventitious arrival from Australia. The objective of this thesis was to quantify, using population models, the effect that P. puparum is having on B. gonerilla abundance. Population monitoring and a phenology model (based on temperature-related development rates) indicated that B. gonerilla has two full generations and one partial generation per summer in the Banks Peninsula region of New Zealand. B. gonerilla abundance was greatly reduced in drought summers, which was probably due to the negative effects of drought on the quality and quantity of the larval host plant Urtica ferox Forst.. A life table study showed that egg parasitism by the unidentified scelionid Telenomus sp. was the largest mortality factor for the pre-imaginal stages of B. gonerilla, followed by "disappearance" mortality (predation and dispersal) in the larval stages. Pupal mortality due to P. puparum was lower compared with that caused by E. intricatoria, with 1-19% and 20-30% of pupae being parasitised by P. puparum and E. intricatoria, respectively. Collection of B. gonerilla pupae from the Christchurch, Dunedin and Wellington areas confirmed higher rates of percentage parasitism by E. intricatoria. B. gonerilla collected from the Banks Peninsula had a 50: 50 sex ratio and lifetime fecundity was estimated in the laboratory as 312 eggs per female. There was no evidence of density-dependent parasitism of B. gonerilla pupae by P. puparum in the field, although there was a significant positive relationship between life table estimates of E. intricatoria parasitism and B. gonerilla pupal abundance. Larval dispersal from the host plant showed a positive relationship with larval instar but no relationship with larval density. Rates of change in B. gonerilla adult abundance between generations within a year showed evidence of density dependence, and this negative feedback was stronger in a drought year. A discrete-time model for B. gonerilla population dynamics was constructed which had two summer generations per year and a partial overwintering generation. The model showed that the presence of this overwintering generation provides a temporal refuge from high levels of E. intricatoria parasitism. Removal of parasitoid mortality from the model suggested that P. puparum was suppressing B. Gonerilla populations on the Banks Peninsula by 5% and E. intricatoria by 30%. An important assumption of the model was that parasitism rates were independent of B. gonerilla density. This assumption appears valid for P. puparum parasitism, but may not be valid for E. intricatoria; therefore the estimated suppression levels due to this adventive parasitoid should be viewed with some caution. It is too soon to generalise on what determines the magnitude of non-target effects by arthropod biocontrol agents, this being only the second study to quantify effects at a population level. However, in this case retrospective analysis has shown that the impact of non-target parasitism by P. puparum on B. gonerilla abundance has been small.

This thesis is an ethnography of Anglo-Indians in Calcutta. All ethnographies are accounts arising out of the experience of a particular kind of encounter between the people being written about and the person doing the writing. This thesis, amongst other things, reflects my changing views of how that experience should be recounted. I begin by outlining briefly who Anglo-Indians are, a topic which in itself alerts one to complexities of trying to get an ethnographic grip on a shifting subject. I then look at some crucial elements that are necessary for an “understanding” of Anglo-Indians in Calcutta: the work that has already been done in relation to Anglo-Indians, the urban context of the lives of my research participants and I discuss the methodological issues that I had to deal with in constructing this account. In the second part of my thesis I explore some crucial elements of the lives of Anglo-Indians in Calcutta: the place of Christianity in their lives, education not just as an aspect of socialisation but as part of their very being and, finally, the public rituals that now give them another way of giving expression to new forms of Anglo-Indian becoming. In all of my work I was driven by a desire to keep close to the experience of the people themselves and I have tried to write a “peopled” ethnography. This ambition is most fully realised in the final part of my thesis where I recount the lives of three key participants.

Although emotional labour has been studied extensively among work populations such as doctors, detectives and adventure tourism guides, there has been no known research on the psychology of actors and acting within an emotional labour framework. This investigation had two purposes. The first was to extend what is currently known about two emotional labour strategies: surface acting, the regulation of observable expressions of emotions, and deep acting, the regulation of felt emotions, to include actual actors. The dependent variables used in this study were job and life satisfaction. The second purpose was to examine whether having a sense of community moderated the relationship between surface acting, deep acting and the dependent variables. Responses from 89 professional, amateur and community theatre actors were analysed. Pearson’s correlation coefficients showed a significant relationship between surface acting and the dependent variables. Hierarchical regression results showed a significant moderation effect for sense of community on the relationship between deep acting and life satisfaction. Implications, limitations, and directions for future research are discussed.

PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTS. DE ENSINO
PROGRAMA DE EXCELENCIA ACADEMICA
PROGRAMA DE DOUTORADO SANDUÍCHE NO EXTERIOR
Um campo de linhas sobre uma superfície é um mapa suave que atribui uma linha tangente a todos, exceto a um número finito de pontos. Esses campos modelam um número de propriedades geométricas e físicas, tais como as direções de curvatura principais nas superfícies ou o fluxo de tensão na elasticidade. Para entender um campo de linha, é usual estudar o comportamento de suas órbitas, que podem apresentar diferentes padrões. Para este fim, consideramos uma abordagem topológica que consiste em utilizar os pontos críticos e separatrices para decompor o campo em regiões de comportamento homogêneo. Focamos em campos que possuem uma estrutura de Morse–Smale. Isso permite operações como o cancelamento de pontos críticos controlados diretamente na decomposição de campo, o que é essencial para a remoção de ruído (simplificação da topologia) em campos provenientes de simulações ou amostragem de problemas do mundo real. Baseado na decomposição de um campo vetorial de Morse–Smale e no cancelamento de pontos críticos, Robin Forman introduziu uma definição discreta para esses campos. O presente trabalho fornece uma definição puramente combinatória para campos de linhas, os campos de linhas discretos, que implicam as construções discretas de Forman para campos de vetores por meio de uma nova representação destes. Campos de linhas discretos admitem uma decomposição que gera uma ponte entre os campos de linhas discretos e suaves, garantindo dessa forma a consistência topológica da definição. Também estabelecemos uma conexão entre um campo de linha discreto e um campo vetorial discreto, desse modo as ferramentas de campos de vetores podem ser usadas em campos de linhas. O trabalho fornece ainda um cancelamento topologicamente consistente de seus elementos críticos para um campo de linha discreto.
A line field on a surface is a smooth map that assigns a tangent line to all but a finite number of points. Such fields model a number of geometric and physical properties, e.g. the principal curvature directions on surfaces or the stress flux in elasticity. They can be seen as a generalization of vector fields. To understand a line field, it is common to study the behavior of its orbits, which can have many different patterns. To this end, we consider a topological approach: we use the critical points and separatrices to decompose the field in regions of similar behavior. We focus on fields that have a Morse–Smale structure. This allows operations like the cancellation of critical points controlled directly in the field decomposition, which is essential for noise removal (topology simplification) on fields coming from simulations or sampling of real-world problems. Based on the decomposition of a Morse–Smale vector field and on cancellation of critical points, Robin Forman introduced a discrete definition for Morse-Smale vector fields. This thesis provides a purely combinatorial definition of line fields, the discrete line fields, entailing Forman s discrete constructions for vector fields through a new representation of these. Discrete line fields admit a (Morse–Smale type of) decomposition that generates a bridge between discrete and smooth line fields, thus guaranteeing the topological consistency of the definition. We also use double branched coverings to suspend discrete line fields to discrete vector fields, so that vector field tools can be used for discrete line fields. Finally we provide, for a discrete line field, a topologically consistent (Morse-like) cancellation of critical elements. This allows a simplification of the discrete line field topology retaining only the most significant features.

Despite work-life balance being an area of interest to many researchers, there is little reference to any effects related specifically to elder care. Current demographics indicate that the proportion of elderly in the community is increasing, and with greater workforce participation (particularly among women workers) the availability of family caregivers is less guaranteed. Women are more likely to be responsible for elder care, and as they seek to manage their work and life, are also more likely to seek workplace flexibility, sometimes through self-employment. The effect that elder care may be having on the work-life balance of self-employed women is the focus of this research project. Using work-family border theory as a lens, this research documented the effect that elder care had on the lives of a group of self-employed women who also had elder care responsibilities. Eight women from the Wellington region participated in this research, which was carried out from a broadly phenomenological perspective. Each participant shared information, using a case study approach, about their business and elder care responsibilities. The results of this research indicate the profound effect of emotions in the elder care situation, and also the effect of expectations from others whose influences affected the ability of the participants to achieve work-life balance.

Brodifacoum is a highly effective anticoagulant rodenticide that presents a secondary hazard to some non-target wildlife. The high acute toxicity of brodifacoum to mammals and birds, and its prolonged persistence in liver predicates secondary risk to predators and scavengers of poisoned rodents. Hence there is a need to improve ability to monitor and predict hazards of brodifacoum to non-targets, and optimise use patterns accordingly. Use of a less persistent anticoagulant rodenticide, diphacinone, is an alternative approach currently under investigation in New Zealand. This thesis describes a series of laboratory and pen studies that address information gaps relevant to the assessment of non-target hazards in continued use of brodifacoum, and of using diphacinone as an alternative. Non-lethal techniques for determining sublethal brodifacoum exposure in birds was investigated in chickens. Elevation of prothrombin time was a less reliable index than residual concentrations in tissues. Samples requiring less invasive procedures, such as dried blood spots or faeces, have potential to detect recent sublethal brodifacoum exposure and refinement of these indices could be useful in proactive monitoring of avian wildlife. Residual brodifacoum in eggs of sublethally-exposed hens raised further questions regarding wider non-target hazard and adverse effects on development of fertile eggs or chicks. A laboratory trial with rats found a positive correlation between residual brodifacoum concentrations in liver and the amount of brodifacoum ingested as bait. An estimated 14-22% of ingested brodifacoum was excreted in rat faeces in the period between ingestion of a lethal dose and death, indicating another potentially significant environmental pathway for brodifacoum transfer. In considering diphacinone as a less persistent alternative rodenticide to brodifacoum, evaluation of residual concentrations and persistence in pig tissues was required to estimate secondary hazard to human consumers and adequate with-holding periods for hunting feral pigs in areas where diphacinone was applied. A pen trial showed that domestic pigs were more susceptible to diphacinone toxicity, and thus primary poisoning risk, than previously estimated. Hepatic half-life of diphacinone in pigs was approximately 14 days, indicating reduced persistence in comparison to brodifacoum and enabling estimates of with-holding periods for hunting feral pigs from areas where diphacinone baits were applied. To investigate potential hazards of diphacinone use to invertebrates a trial using tree weta, a native New Zealand invertebrate, was undertaken. Weta readily ate diphacinone wax block baits with no mortality or weight loss evident, indicating low susceptibility. Residual whole-body diphacinone concentrations did not increase with the amount of diphacinone bait eaten. A simple, deterministic risk assessment suggested that, as a single secondary exposure, the maximum diphacinone concentration measured in weta would present a low risk to non-target birds. Given international recognition of the high secondary hazard and corresponding restrictions on use of brodifacoum, continued availability of brodifacoum to non-licensed users and sustained field applications for possum and rodent control in New Zealand is an exceptional use pattern. New data in this thesis suggest that baiting strategies that minimise the amount of brodifacoum available in the environment are important and regulatory review of some New Zealand brodifacoum applications should address this. In parallel, development of diphacinone as an alternative to brodifacoum should continue, as new data here confirms lower persistence in mammalian liver than brodifacoum, and also indicates low toxicity to invertebrates. However further investigation of multiple-exposure hazard and potential sublethal effects of diphacinone on non-target mammals and birds is warranted before extensive and sustained field applications of diphacinone are undertaken.

Among the species of Diomedea albatrosses, diverse foraging strategies during breeding have been described, indicating species differences in foraging ecology and behaviour. Foraging strategies of Southern Royal Albatrosses, Diomedea epomophora (SRA) breeding on Campbell Island were studied in January – early February 1999 during the latter half of incubation. Movements and activity of ten birds were monitored using satellite transmitters and wet-dry activity recorders. Three birds from a pilot tracking study in February 1997 were also included in some analyses. Foraging strategies, zones used, factors influencing the duration of foraging trips, and the influence of wind conditions were investigated. Foraging activity took place at sites with bathymetric characteristics associated with high productivity: outer shelf and shelf-break zones, with a concentration of activity on a shelf contour south of the Snares Islands. This is in contrast to Wandering (D. exulans) and Gibson’s (D. gibsoni) albatrosses, typically deep oceanic foragers, but is similar to Northern Royal Albatross (D. sanfordi). The maximum distance of foraging trips from the colony was 1250 kilometres (mean 584 +351(SD)). This was closer than for incubating Wandering and Gibson’s Albatrosses but more distant than for Northern Royal Albatross from the Otago Peninsula. The mean duration of 77 foraging trips from 52 nests was 10.11 days for females and 8.76 for males (ns). Foraging trips became shorter as incubation progressed. Foraging trips were shorter, but not significantly so, when the median wind speed throughout the foraging trip was higher. No significant relationship was found between bird mass and duration of foraging trips. The mean cumulative distance flown by the ten birds tracked in 1999 was 4262 km + 1318 (SD). Eight of the ten SRA employed a ‘commute, forage, commute’ foraging strategy, and the other two alternated short bouts of commuting and foraging. Commuting phases were characterised by rapid directional flight with a straight-line distance (range) of 180 km to 800 km between positions 24 hours apart. Foraging phases were characterised by a range of less than 180 km per 24 hour interval and frequent tight turns. Displacement rate between successive uplinks was significantly higher during commuting phases (28.6 kph + 1.93 SE) than foraging phases (15.1 kph + 1.4 SE). Wind strength and direction influenced the timing of the return commute to the colony. SRA covered greater distances at more favourable wind angles relative to flight track (broad reach and close reach) than in head, tail or direct side winds. Birds of low mass (< 8kg) made fewer landings in winds above 40 kph than in lighter winds, whereas heavier birds had a similar level of landing activity across all wind speed bands. One bird was delayed for several days by light winds, and another flew off course during strong winds. Two birds exploited the same window of wind conditions to return to the colony, each flying a similar course in both timing and route. These results define the foraging strategies of SRA during incubation, and demonstrate the influence of wind conditions and other factors on the overall duration of foraging trips and on the timing of commuting and foraging phases.

Arthropod species that have the potential to damage crops are food resources for communities of predators and parasitoids. From an agronomic perspective these species are pests and biocontrol agents respectively, and the relationships between them can be important determinants of crop yield and quality. The impact of biocontrol agents on pest populations may depend on the availability of other food resources in the agroecosystem. A scarcity of such resources may limit biological control and altering agroecosystem management to alleviate this limitation could contribute to pest management. This is a tactic of ‘conservation biological control’ and includes the provision of flowers for species that consume prey as larvae but require floral resources in their adult stage. The use of flowers for pest management requires an understanding of the interactions between the flowers, pests, biocontrol agents and non-target species. Without this, attempts to enhance biological control might be ineffective or detrimental. This thesis develops our understanding in two areas which have received relatively little attention: the role of flowers in biological control by true omnivores, and the implications of flower use by fourth-trophic-level life-history omnivores. The species studied were the lacewing Micromus tasmaniae and its parasitoid Anacharis zealandica. Buckwheat flowers Fagopyrum esculentum provided floral resources and aphids Acyrthosiphon pisum served as prey. Laboratory experiments with M. tasmaniae demonstrated that although prey were required for reproduction, providing flowers increased survival and oviposition when prey abundance was low. Flowers also decreased prey consumption by the adult lacewings. These experiments therefore revealed the potential for flowers to either enhance or disrupt biological control by M. tasmaniae. Adult M. tasmaniae were collected from a crop containing a strip of flowers. Analyses to determine the presence of prey and pollen in their digestive tracts suggested that predation was more frequent than foraging in flowers. It was concluded that the flower strip probably did not affect biological control by lacewings in that field, but flowers could be significant in other situations. The lifetime fecundity of A. zealandica was greatly increased by the presence of flowers in the laboratory. Providing flowers therefore has the potential to increase parasitism of M. tasmaniae and so disrupt biological control. A. zealandica was also studied in a crop containing a flower strip. Rubidium-marking was used to investigate nectar-feeding and dispersal from the flowers. In addition, the parasitoids’ sugar compositions were determined by HPLC and used to infer feeding histories. Although further work is required to develop the use of these techniques in this system, the results suggested that A. zealandica did not exploit the flower strip. The sugar profiles suggested that honeydew had been consumed by many of the parasitoids. A simulation model was developed to explore the dynamics of aphid, lacewing and parasitoid populations with and without flowers. This suggested that if M. tasmaniae and A. zealandica responded to flowers as in the laboratory, flowers would only have a small effect on biological control within a single period of a lucerne cutting cycle. When parasitoids were present, the direct beneficial effect of flowers on the lacewing population was outweighed by increased parasitism, reducing the potential for biological control in future crops. The results presented in this thesis exemplify the complex interactions that may occur as a consequence of providing floral resources in agroecosystems and re-affirm the need for agroecology to inform the development of sustainable pest management techniques.

Since new product designs have little field data available a correlation between field and accelerated test life cannot be made. However, a step partially accelerated life test approach where samples are tested under normal conditions for a time and then run to failure on an accelerated test can be used to estimate the statistical model parameters. This thesis developed the maximum likelihood parameter estimates for a step partially accelerated life test based on a Weibull distribution model for a hypothetical automotive component. Using a Monte Carlo approach with type-II censoring, the effect of sample size and length of sampling period used on the variability of the estimated parameters was examined. A smaller sampling period and small sizes lead to significant variability, which decreased as the sampling period and sample size increased. Use of a partitioned sample did not lead to an improvement in the variability of the estimates.
Department of Mathematical Sciences

Magnetohydrodynamic dynamo in disc-like astrophysical bodies has been considered for some time. Important astrophysical objects like accretion discs, protostellar and protoplanetary nebulae and galaxies are thought to regenerate a magnetic field through a dynamo mechanism. Although there is a well developed theory for describing the regeneration of magnetic field in these objects, there are not any specific methods how to calculate such magnetic fields in general case. In this work, after a description of the dynamo theory, the specific method for solving the nonspherical dynamo is introduced. The unique feature of this method is accommodation of variable magnetic diffusivity in order to model the shape of a disc-like body. The detailed construction of the method is presented, as well as description of mathematical and numerical methods used for obtaining the solution. The method of checking the model with respect to well established spherical models is also presented. Finally, some examples are calculated and discussion is given on the behaviour of calculated magnetic field and possible astrophysical implications.

Studies in the USA have reported that species of meiobenthic copepods can be used as bioindicators of sediment-associated contaminants. The main objective of this research project was to develop and validate methods to assess the effects of estuarine pollution, using the marine benthic copepod Robertsonia propinqua as a bioindicator of environmental health in New Zealand intertidal / estuarine areas. Cultures of R. propinqua were set up and maintained in the laboratory and individuals used in 96h acute and full life-cycle chronic bioassays using the pre-selected contaminants atrazine and zinc sulphate. From the 96h acute experiments it was found that the lethal doses at which 50% mortality occurred (LC50) for exposed nauplii and adult individuals were 7.5 mg/L and 31.8 mg/L, respectively for atrazine and 1.7 mg/L and 2.7 mg/L, respectively for zinc sulphate. This indicated that the nauplii life stage was more sensitive than were the adult life stages for exposure to both contaminants. Based on the 'trigger' values reported (atrazine = 0.013 mg/L, zinc = 0.015 mg/L) in the Australian and New Zealand guidelines for fresh and marine water quality, which provide values at which concentrations of contaminants can occur in the environment before they begin causing effects on aquatic fauna, it is unlikely that the calculated LC50s in the current research will induce biological effects in exposed copepods in the short-term. The calculated LC50 results were then used to further investigate the effects of chronic exposure of sediment-associated contaminants on the complete life-cycle (egg-reproductive adult) of R. propinqua. In a laboratory-based full life-cycle toxicity test, field-collected sediments from polluted sites in the Auckland and Bay of Plenty regions reduced reproductive output (nauplii and copepodite production) of R. propinqua individuals, but the number of males and females, gravid females, clutch size per female and the number of eggs produced were not affected by either the polluted or non-polluted (reference) sediment samples from both field regions. Field investigations of meiofauna community composition in polluted and non-polluted field sites were carried out in 2004 in the Auckland and Bay of Plenty field regions in New Zealand. Greater sediment organic content and a correspondingly deeper redox potential discontinuity layer occurred in all polluted field sites compared with the non-polluted sites. However, species composition could not be used to characterise polluted and non-polluted sites, as there were no dominant taxa which were representative of these sites. The results presented in this thesis indicate that R. propinqua has strong potential to be a good candidate species as a bioindicator of environmental contamination. Furthermore, the full life-cycle toxicity test could be used as a rapid test to detect immediate changes in individual reproduction and development as well as long-term population effects. The technologies developed as part of this research may eventually provide additional tools for commercial environmental consultancies and may compliment existing standard operating procedures for environmental assessments involving pollution of estuarine ecosystems.

The present work is included in the context of the assessment of sustainability in the construction field and is aimed at estimating and analyzing life cycle cost of the existing reinforced concrete bridge “Viadotto delle Capre” during its entire life. This was accomplished by a comprehensive data collection and results evaluation. In detail, the economic analysis of the project is performed. The work has investigated possible design alternatives for maintenance/rehabilitation and end-of-life operations, when structural, functional, economic and also environmental requirements have to be fulfilled. In detail, the economic impact of different design options for the given reinforced concrete bridge have been assessed, whereupon the most economically, structurally and environmentally efficient scenario was chosen. The Integrated Life-Cycle Analysis procedure and Environmental Impact Assessment were also discussed in this work. The scope of this thesis is to illustrate that Life Cycle Cost analysis as part of Life Cycle Assessment approach could be effectively used to drive the design and management strategy of new and existing structures. The final objective of this contribution is to show how an economic analysis can influence decision-making in the definition of the most sustainable design alternatives. The designers can monitor the economic impact of different design strategies in order to identify the most appropriate option.

The Tasmanian lacewing (Micromus tasmaniae Walker) is one of the most common aphid predators occurring in lucerne crops in New Zealand. A comparison of sampling techniques, and the output from a simulation model, suggest that the abundance of this lacewing may have been significantly underestimated in the past. Although the occurrence of aphid predators was erratic M. tasmaniae occurred more often and in far greater numbers (up to 100 m⁻²) than any other predator species. A simulation model for lacewing development in the field indicated that the large adult populations which occurred could be accounted for on the basis of reproductive recruitment. Independent evidence that immigration was not involved in the occurrence of these large populations was gathered using directional flight traps around the field perimeter. The major factors influencing lacewing population dynamics were the availability of aphid prey and, in the autumn, parasitism. Otherwise, survival of all life-histoty stages was high with no evidence of egg or larval cannibalism. Several instances of high lacewing mortality were identified by the model and the lack of any obvious cause for these highlights inadequacies in the understanding of lacewing bionomics. The model, which used a linear relationship (day-degrees) between development and temperature, was incapable of accurately predicting lacewing emergence under field temperatures which fluctuated outside the linear region of the development rate curve. Temperature thresholds and thermal requirements estimated under fluctuating temperatures similar to those in the field produced almost identical model output to those estimated under constant temperatures in the laboratory. Prey species was capable of influencing the rate of lacewing development. M. tasmaniae has the attributes necessary to produce large populations in the short time available between lucerne harvests. The asymptote of the functional response curve is low but the efficiency at converting aphids to eggs is high. Therefore, the lacewing is able to attain maximun reproductive output at low prey densities. A low temperature threshold for development (4-5° C), rapid development and short preoviposition period results in a short generation time (49 days at 15° C). Long adult life, high fecundity and the absence of any form of estivation or diapause, results in complete overlap of generations and multiple generations per year. M. tasmaniae's role as an aphid predator is restricted by its low appetite for prey and by the lucerne management regime currently practiced in New Zealand. Because it consumes relatively few aphids per day the lacewing's ability to destroy large aphid populations is limited. However, this may be offset by its ability to attack aphids early in the aphid population growth phase, and by the large numbers of lacewings which may occur. Under the present lucerne management schemes the large lacewing populations which do occur are forced out of the fields, or die, following harvest. A number of management options for increasing the lacewings impact as an aphid predator are briefly discussed.

Artifi cial potential fi elds is a technique that use attractive and repelling forces to control e.g. robots, or non player characters in games. We show how this technique may be used in a controller for Super Mario in a way create a human-like playing style. By combining fi elds of progression, opponent avoidance and rewards, we get a controller that tries to collect the rewards and avoid the opponents at the same time as it is progressing towards the goal of the level. We use human test persons to improve the controller further by letting them make pair-wise comparisons with human play recordings, and use the feed-back to calibrate the bot for human-like play.
Student 1: Likith Poovanna Kelapanda Staish Mob: +46735542609 Student 2: Vinay Sudha Ethiraj Mob: +46736135683

The discovery and taxonomic history of fluttering shearwater (Puffinus gavia (Forster) and Hutton's shearwater (Puffinus huttoni Mathews) are reviewed. Taxonomic theory, where appropriate to this thesis, is discussed. The external morphology of P. gavia and P. huttoni is compared. No single external measurement or plumage character separates more than 60% of birds examined. The best system of identification is to compare the ratio of different body parts within an individual bird. The distribution of P. gavia and P. huttoni is compared. Hutton's shearwater feeds further out to sea and it is believed to be a migrant species wintering in north west Australian waters. The fluttering shearwater is believed to be a semi-migrant species with only the juveniles spending time in south east Australia. The red cell enzymes of P. gavia, P. huttoni and P. griseus are compared. There are differences in two esterase loci between gavia and huttoni, while P. griseus is more distantly related. Nei's genetic identity values are calculated. The systematic value of electrophoretic data is discussed. The relationship of an undescribed subfossil shearwater to P. gavia and P. huttoni is discussed. An outgroup analysis to other shearwater species is carried out according to phylogenetic (cladistic) theory. The subfossil shearwater is most closely related to the fluttering shearwater, and these two form a sister group to Hutton's shearwater. These three species are a sister group of P. opisthomelas. The relationship between the many P. assimilis subspecies, the black-backed Manx shearwaters, and the gavia, huttoni and opisthomelas group was not resolved. Puffinus nativitatis is more closely related to the Manx and the little shearwaters than to the P. griseus, P. tenuirostris group.

The aim of the dissertation is the analysis of high pulsed magnetic field in-ductors in order to determine their electrophysical parameters for non-destructive magnetic field generation. To obtain that effective method to synthe-size inductor geometrical and material models was developed, inductor mathe-matical and computer models created, electrophysical processes during the pulse in windings of various inductors were examined. Finally, retrievals of non-destructive inductor geometrical configurations were performed. Software de-veloped and results gained were successfully used to design new pulsed inductor prototypes. Dissertation content: introduction, four chapters, general conclusions, list of references and list of author’s publications on the subject of dissertation. The introduction contains the topicality of the problem, aim of the work, main tasks, scientific novelty, practical value, result approval, defended state-ments and structure description. Overview of different high magnetic field generation techniques, pulsed in-ductor design, geometry optimization problems and software used for these tasks are the objectives of the first chapter. The second chapter is dedicated to development of technique for inductor geometrical-material model synthesis, creation of mathematical-computer induc-tor model, definition of long-life operation inductor parameters – their “vitality zone” and design of non-destructive inductor geometries retrieval algorithm. In the third chapter... [to full text]
Disertacijoje nagrinėjami stipraus impulsinio magnetinio lauko induktoriai, kurių ilgaamžiškumas priklauso nuo daugelio jų fizikinių parametrų. Sukūrus induktorių geometrijos sintezės metodiką, sudaryti induktorių matematiniai ir kompiuteriniai modeliai, ištirti impulso metu skirtingų parametrų induktorių ap-vijose vykstantys procesai, atlikta daugkartinio naudojimo induktorių geometrijų paieška. Sukurtas programinis aprūpinimas induktorių skaičiavimams įgalina nustatyti induktorių, tinkamų daugkartiniam impulsiniam magnetiniam laukui generuoti, parametrus. Darbo rezultatai pritaikyti kuriant induktorių prototipus. Disertaciją sudaro įvadas, keturi skyriai, bendrosios išvados, literatūros ir publikacijų disertacijos tema sąrašas. Įvadiniame skyriuje aprašomas problemos aktualumas, formuluojamas dar-bo tikslas ir uždaviniai, pristatomi autoriaus pranešimai ir publikacijos, patei-kiama disertacijos struktūra. Pirmajame skyriuje aptariama stipraus magnetinio lauko reikšmė šiuolaiki-niam mokslui, pristatomi stipraus magnetinio lauko generavimo būdai, analizuo-jami impulsiniai induktoriai, jų kompiuterinių modelių sudarymo problematika, geometrijos optimizavimas. Antrajame skyriuje aprašoma induktorių geometrijos ir medžiagų sudėties sintezės metodika, sukuriamas induktoriaus matematinis-kompiuterinis modelis, apibrėžiama daugkartinio naudojimo induktorių pagrindinių parametrų visuma – „gyvavimo zona“, pateikiamas daugkartinio naudojimo induktorių geometrijų paieškos algoritmas... [toliau žr. visą tekstą]

Being storied; a lived experience of time discusses selected aspects of the research and studio practice undertaken in the course of the year 2008. Central to the process has been attending to the mundane acts of everyday life in the rural environment in which I live. It discusses actions such as walking, listening, collecting and documenting as well as experiments with a waste material, used baling plastic that is installed in various ways into the landscape. Parallel to this are investigations with sound and text, which have drawn on my varied musical background. There is an exploration of time - the idea of durée, human experience of time, quality of attention through intense focus, and memory as it accumulates over time. Art of the everyday has also been a key area of research. Life changing events have occurred during the course of the year. The death of parents has substantially influenced the work. The practice described is multi-faceted, involving the use of text, sound, photography and film.

Many quaking aspen (Populus tremuloides) stands throughout western North America are considered mature, overmature, or decadent, and lack root suckering to replace the overstory mortality. To mimic natural disturbance and stimulate aspen suckering, prescribed burning or harvesting is needed. It is important to identify pre-disturbance indicators so that land managers will have a way to assess potential sucker production resulting from a prescribed treatment. In fall 2011, eight field sites were located in the Cedar Mountain study area in southern Utah, and two field sites were located on Deseret Land and Livestock land in northern Utah. At each site, two aspen stands were selected within 50 m of each other, one having a relatively low live aspen basal area and one stand having a relatively high live aspen basal area. Above- and belowground pre-disturbance site characteristics for each paired plot were measured and compared. In spring 2012, all trees within 12.2 m (40 ft) of plot center were felled to stimulate a suckering response from the root system. Root diameter and root surface area proved to be the best predictors of sucker regeneration density after a disturbance. Sucker densities decrease with increasing root diameters, and most suckers are produced on roots less than 2.5 cm in diameter. The highest sucker densities were recorded on plots which contained abundant roots less than 2.5 cm in diameter. A simple methodology for sampling aspen roots in the field is outlined and is based on the relationship between root diameter, root surface area and sucker production. There was no relationship between total nonstructural carbohydrate (TNC) concentration in the roots (measured as starch and water soluble carbohydrates (WSC), % dry weight) and sucker density, indicating that TNC concentration cannot be used as an indicator of sucker ability of aspen after a disturbance. This study also documents the effect of herbivory on sucker height. In areas where grazing and browsing pressures were great, sucker potential was severely decreased due to the effects of repeated hedging below the browse line or complete sucker elimination. If aspen are to persist on the landscape under these circumstances, management strategies must be implemented to enhance aspen regeneration.

The magnitude of an electric field possible to apply in a capillary separation system is limited, because a high electric field causes a too high current through the capillary. Application of the electric field in-line will give an increased conductivity in the column, further increasing the risk of too high currents. The conductivity changes were found to result from an overall increase in ionic strength within the electric field. The increase in ionic strength is caused by the increase in mobile phase ions with electrophoretic velocity against the flow, together with OH^- or H₃O⁺ ions (depending on polarity) formed at the inlet electrode. Further it was found that the use of a pressurized reservoir or splitting of the flow at the inlet electrode could significantly limit the conductivity changes and thereby the maximum applicable electric field strengths could be increased.