Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"Janzen"”.
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Seed dispersal in South African trees: with a focus on the megafaunal fruit and their dispersal agents
… in the lowlands of Costa Rica was first noted by Janzen. In collaboration with Pleistocene faunal expert Paul Martin they conjectured that these fruit were ecological anachronisms that had evolved in the presence of large terrestrial vertebrates (>1000kg - megafauna) but had remained long after …
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The Parataxonomist Revolution : how a group of rural Costa Ricans discovered 10,000 new species
… parataxonomy program, led by biologists Daniel Janzen and Winnie Hallwachs, is part of the unique conservation model of Costa Rica's Area de Conservacidn Guanacaste (ACG). Hiring local people, rather than students or academics, as permanent field researchers upset traditional research …
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An investigation into the effects of homopteran honeydew sugars versus floral nectar sugars on black fly longevity, flight performance and digestion /
… 2002), deer flies (Magnarelli & Burger 1984; Janzen & Hunter 1998; Ossowski & Hunter 2000), horse flies (Schutz & Gaugler 1989; Hunter & Ossowski 1999) and sand flies (MacVicker et al. 1990; Wallbanks et al. 1990; Cameron et al. 1992, 1995; Schlein & Jacobson 1994, 1999; Hamilton & EI Naiem …
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The role of seed attributes in eastern gray squirrel foraging
… and provides indirect evidence supporting the Janzen-Connell and handling time hypotheses. From an economic perspective (chapter 3), I found that eastern gray squirrels are homogenous with respect to their preferences for seed attributes, which is likely due to natural selection favoring …
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Calibration of empirical, semi-empirical, and physics-based material models for the prediction of creep and tensile behaviour of Alloy 617
Material models are powerful analytical tools for predicting material behaviour under various loading conditions. These models vary in complexity, progressing from empirical models that rely solely on fitting experimental data, to semi-empirical models that incorporate simplified physical concepts, …
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Virtual camera selection using a semiring constraint satisfaction approach
Players and viewers of three-dimensional computer generated games and worlds view renderings from the viewpoint of a virtual camera. As such, determining a good view of the scene is important to present a good game or three-dimensional world. Previous research has developed technologies to nd good …
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Experiences of Parents Advocating for the “Complicated Child”: A Phenomenologically Oriented Descriptive Exploration
This paper is a phenomenologically oriented descriptive study that analyzed the experiences of parents advocating for a complex child within the special education sector. More specifically the research examined parental experiences during the Individual Education Plan (IEP) and during the …
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On the Effect of Initial Imperfections On the Behavior of Thin-Walled Axially Compressed Circular Cylinders
Made available in DSpace on 2014-12-10T17:25:55Z (GMT). No. of bitstreams: 1 7020986.pdf: 2155306 bytes, checksum: f7d7b9fe32c30256adbaaa86390ad113 (MD5) Previous issue date: 1970
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Fruit to Sapling: an Ontogenetically Integrated Study of Tree Recruitment in an Amazonian Rainforest
… conform closely to predictions of the Janzen-Connell hypothesis of tropical tree recruitment.</p>
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Topics in the Theory of Quantum Degenerate Gases
… with an empirical interatomic potential by Janzen and Aziz and using the Path Integral Monte Carlo (PIMC) technique. We show that, for the calculation of the second coefficient, the method is successful whereas for the third the particular implementation that we chose (free particle …
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Topics in the theory of quantum degenerate gases
… with an empirical interatomic potential by Janzen and Aziz and using the Path Integral Monte Carlo (PIMC) technique. We show that, for the calculation of the second coefficient, the method is successful whereas for the third the particular implementation that we chose (free particle …
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The boundary between "us" and "them": readers and the non-English word in the fiction of Canadian Mennonite writers
This study asks whether the use of non-English words in the novels of Canadian Mennonites perpetuates a cultural binary, and concludes that it does not. The use of the non-English word, rather than enforcing a binary between "us and them", ultimately reveals that cultural boundaries are permeable …
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Apparent induction, kinetic and physical properties of the multiple species of ornithine decarboxylase, forms A and B, in the kidney and liver of hormone-treated rat
Ornithine decarboxylase occurs in the kidney and liver of control and hormone treated rats as two ionic forms, designated ODC A and B in order of elution by DEAE-Sepharose chromatography. These studies were designed to better characterize the multiple forms of ODC and to investigate the functions …
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Hyporheic flow in a mountainous riverine system
Investigation into the effects of beaver dams on hyporheic exchange in peat dominated mountainous streams is needed to better understand stream-floodplain connections and improve our overall conceptual model of water storage and flow through riverine valleys. The objective of this study was to …
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Work and family roles, gender, socioeconomic status and health : a study of employed Canadian men and women
Using data from Statistics Canada's National Population Health Survey, the present study investigated the psychosocial determinants of health status among employed Canadian adults. The results are presented in three interrelated papers. The first paper highlights the patterning of health among …