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Rozprawy doktorskie na temat „Abundance”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Steele, Matthew. "Determining Oxygen Abundance vs. Age and Iron Abundance in Halo Field Dwarfs." Bowling Green State University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1120666230.

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DEMEIO, JULIAN LAWRENCE. "Abundance of rational points." Doctoral thesis, Scuola Normale Superiore, 2021. http://hdl.handle.net/11384/109444.

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For a smooth algebraic variety X defined over a number field K, one could ask several questions about the abundance of its rational points. This thesis revolves, in particular, around the following three properties: Hilbert Property, weak approximation and strong approximation. The first concerns, more or less, the question of extending the Hilbert Irreducibility Theorem to an arbitrary X (in the sense that the parameters of the Theorem are allowed to vary through rational points of this variety), the interesting case being when X is non-rational, for otherwise one recovers precisely the

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3

Jonas, Seth H. "Aluminum-26 : an abundance mechanism." Honors in the Major Thesis, University of Central Florida, 2001. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/226.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.<br>Bachelors<br>Arts and Sciences<br>Physics

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4

Stehle, Matthias. "Abundance Tomography of Type Ia Supernovae." Diss., lmu, 2004. http://nbn-resolving.de/urn:nbn:de:bvb:19-32721.

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5

Tsamis, Ionnis. "Heavy element abundance in ionized nebulae." Thesis, University College London (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270150.

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6

Akerman, Christopher John. "Chemical abundance studies, near and far." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613697.

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Armstrong, David John. "On the abundance of circumbinary exoplanets." Thesis, University of Warwick, 2015. http://wrap.warwick.ac.uk/72676/.

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Circumbinary planets are bodies that orbit both components in a binary star system. This thesis focuses on transits of these planets, which with the aid of the Kepler space telescope have recently led to the discovery of several such objects. First, transit timing variations - departures from strict periodicity in the transit times - are studied. These arise from both the motion of the host stars and relatively rapid precession of the planet’s orbit. Limits on the maximum possible transit timing variation are derived, and tested against N-body simulations of simulated circumbinary systems. The

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8

Momal, Raphaëlle. "Network inference from incomplete abundance data Accounting for missing actors in interaction network inference from abundance data Tree‐based inference of species interaction networks from abundance data." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASM017.

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Les réseaux sont utilisés comme outils en microbiologie et en écologie pour représenter des relations entre espèces. Les modèles graphiques gaussiens sont le cadre mathématique dédié à l'inférence des réseaux de dépendances conditionnelles, qui permettent une séparation claires des effets directs et indirects. Cependant, les données observées sont souvent des comptages discrèts qui ne permettent pas l'utilisation de ce modèle. Cette thèse développe une méthodologie pour l'inférence de réseaux à partir de données d'abondance d'espèces. La méthode repose sur une exploration efficace et exhaustiv

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9

Dockendorf, Kevin J. "Relationships between zooplankton abundance and age-0 black crappie abundance and size at three productive Florida lakes." [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE0000523.

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10

McInnes, AM, DG Allan, and G. Malan. "Key sites for the conservation of waterbirds (Aves) in Durban Bay, South Africa." Durban Museum Novitates, 2005. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001003.

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Key sites for the conservation of waterbirds (Aves) in Durban Bay, South Africa. Durban Museum Novitates 30: 1-14. Forty-eight monthly counts of waterbirds were conducted in Durban Bay (July 1999-June 2003). A total of 47 227 waterbirds of 79 species were recorded. Eighteen waterbird species were significantly more abundant in summer while seven were significantly more abundant in winter. Centre Bank supported 40.6% of all waterbirds, comprising mainly Palearctic waders and roosting gulls and terns. Distinct species assemblages of plovers (Charadridae) and sandpipers (Scolopacidae) were associ

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11

Labuschagne, K., LJ Gerber, I. Espie, and S. Carpenter. "Culicoides biting midges at the National Zoological Gardens of South Africa." Onderstepoort Journal of Veterinary Research, 2007. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001257.

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Abstract Culicoides biting midges (Diptera: Ceratopogonidae) are responsible for the transmission of a large number of pathogens to livestock and wild animals. In this study the presence of the genus, using light traps based at four different sites within the National Zoological Gardens of South Africa, was investigated during 2002-2004. In total, 37species were recorded, including large numbers of Culicoides irnicola Kieffer, 1913, which is responsible for the transmission of economically important arboviruses in South Africa, Europe, Middle and Far East. These results are discussed with refe

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12

Brewer, Andrew M. "Interactions between demographic rates, population density and the environment : the spatial structure of the range of the holly leaf-miner." Thesis, University of Sheffield, 2001. http://etheses.whiterose.ac.uk/14830/.

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Generalisations about the abundance structure of species' geographic ranges may have implications within a number of areas of applied ecology. However, empirical data is largely restricted to a single taxonomic group within one geographic region. One approach to the study of range structure and its ecological consequences is to examine the relationship between demographic rates and environmental conditions. However, most studies of population processes are at small spatial scales and it is not known to what extent patterns found at these scales may be extrapolated. This thesis addresses these

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13

Friesen, Trevor. "Effects of food abundance and temperature on growth, survival, development and abundance of larval and juvenile smallmouth bass." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ33299.pdf.

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14

Sullivan, Madsen Paul. "Effects of and Influences on Microbial Populations of Missouri Maize Fields." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7706.

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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 influe

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15

Temple, Victoria. "Creating health and abundance with complementary currencies." [Denver, Colo.] : Regis University, 2005. http://165.236.235.140/lib/vtemple2005.pdf.

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16

Benisty, Hannah 1986. "Post-transcriptional determinants of RAS protein abundance." Doctoral thesis, Universitat Pompeu Fabra, 2019. http://hdl.handle.net/10803/668206.

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The RAS oncogenes KRAS, NRAS and HRAS are mutated in one third of human cancers where they exhibit different mutation patterns. A potential factor contributing to this mutation bias is the variation of RAS expression levels. Here, I investigate some of the determinants of RAS protein abundance. First, I examine whether codon bias among RAS genes and within other cancer gene families plays a role in cell context-specific expression. I further describe a tRNA expression program that favors oncogene translation in proliferating cells. Second, I investigate why oncogenic RAS mutants exhibit a hi

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17

Harris, Danielle V. "Estimating whale abundance using sparse hydrophone arrays." Thesis, University of St Andrews, 2012. http://hdl.handle.net/10023/3463.

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Passive acoustic monitoring has been used to investigate many aspects of marine mammal ecology, although methods to estimate absolute abundance and density using acoustic data have only been developed in recent years. The instrument configuration in an acoustic survey determines which abundance estimation methods can be used. Sparsely distributed arrays of instruments are useful because wide geographic areas can be covered. However, instrument spacing in sparse arrays is such that the same vocalisation will not be detected on multiple instruments, excluding the use of some abundance estimation

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18

Brandejsová, Jana. "Abundance včelstev v krajině a úživnost katastru." Master's thesis, Česká zemědělská univerzita v Praze, 2016. http://www.nusl.cz/ntk/nusl-260588.

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Determining place thesis Abundance of bee colonies in the country and the carrying capacity of the land register. Establishing a Connection in Úvaly near Prague with three beekeepers. For these three beekeepers were required to determine reserves of pollen with three visits in the period of May, June and July. Each measurement was carried out always at the three strongest hives. Proven reserves of pollen was performed using photographs of each honeycomb in the hive. After calculating reserves of pollen, to assess the value of honey to the surrounding plants. The conclusion was to determine whe

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19

Tracey, John Paul. "Assessing estimators of feral goat (Capra hircus) abundance." Connect to this title online, 2004. http://cicada.canberra.edu.au/public/adt-AUC20050708.103427/.

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20

Vradenburg, John. "Distribution and abundance of anurans in southeast Missouri." Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4258.

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Thesis (M.S.)--University of Missouri-Columbia, 2005.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (January 10, 2007) Includes bibliographical references.

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21

Tracey, John Paul, and n/a. "Assessing estimators of feral goat (Capra hircus) abundance." University of Canberra. Resource, Environmental & Heritage Management, 2004. http://erl.canberra.edu.au./public/adt-AUC20050708.103427.

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(1) Reliable measures of population abundance are essential for managing wildlife effectively. Aerial surveys provide a rapid and efficient means of surveying large mammals and many techniques have been developed to adjust for the inability to count all animals within transects. The probability of detection varies according to a range of factors which are important to consider when estimating density. Standardised survey methods developed in flat country are not readily transferable to steep terrain due to safety, access and difficulties delineating transect widths. Other methods have logistic

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22

Bilodeau-Goeseels, Sylvie. "Changes in RNA abundance in early bovine embryos." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq20726.pdf.

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Ecke, Frauke. "Effects of landscape patterns on small mammal abundance." Doctoral thesis, Luleå, 2003. http://epubl.luth.se/1402-1544/2003/30/index.html.

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24

Hansteen, Anja Pandora Ulsom. "Oil Abundance, Ethnic Minority Rule, and Civil War." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for samfunnsøkonomi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23064.

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25

Chandramohan, Preethi. "Causal relationships between sulphur emissions and pathogen abundance." Thesis, University of Reading, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.525131.

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26

Gardner, M. J. "Circadian rhythms in transcript abundance in Arabidopsis thaliana." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.599310.

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To characterise the circadian transcriptome, the expression profiles of transcripts in whole leaves of mature, soil grown <i>A. thaliana </i>plants were analysed. Circadian-regulated transcripts constituted approximately 9.5% of the transcripts detected, and were found to encode proteins involved both a well-described circadian processes and in pathways that have not been previously identified as having circadian regulation. Transcripts encoding proteins involved in core metabolic processes and stress response pathways were particularly highly representative in the dataset, which suggested a p

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27

Waring, Paul. "Abundance and diversity of moths in woodland habitats." Thesis, Oxford Brookes University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277095.

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The abundance and diversity of moths and their larvae are compared in various woodland habitats within Bernwood Forest in lowland England to assess the impact of large-scale planting of introduced conifers and of conservation measures including coppicing and ride-side management. Light trap catches of moths in conifer plantations and in a recently coppiced site contained significantly fewer individuals and fewer species over the year compared with sites in adjacent overgrown coppice, but species diversity, measured by Fisher's index 0<. , was higher because cat ches in the latter were dominate

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28

Maudsley, Martin J. "Regional differences in the abundance of cereal aphids." Thesis, University of East Anglia, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359262.

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Al-Fahmi, Mohammed M. "Controls on fracture abundance in gently deformed carbonates." Thesis, University of Oxford, 2018. http://ora.ox.ac.uk/objects/uuid:74e221c4-6b37-46a5-bba8-7aaa458bed92.

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Fractures can profoundly affect the capacity of carbonate reservoirs to store and permeate fluids, depending on the properties and abundance of fractures. Fractures exist abundantly in carbonate outcrops; however, their abundance in subsurface carbonates is obscure because of the data shortages and uncertainties about the factors that drive fracturing in sedimentary basins. The objective of this research is twofold. The first is to study abundance of fractures in gently deformed carbonates, which were generally overlooked. The second is to address measuring fracture abundance using electrical

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30

Krahmer, Johanna. "Circadian abundance and modification of proteins in Arabidopsis." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/15969.

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Circadian clocks are endogenous pacemakers found in many organisms including plants, generating approximately 24h rhythms. Knowledge about the plant circadian clock plays a role for crop improvement. The plant circadian clock and its downstream outputs have been studied in detail by transcriptomics, however post-transcriptional and post-translational aspects are still to be researched. In addition, it has recently been shown that a protein modification remains rhythmic when rhythmic transcription is absent. This gives evidence for the existence of two oscillators: a transcription-translation f

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31

Kirat, Yassine. "Economic and environmental impacts of natural resources abundance." Thesis, Paris 1, 2019. http://www.theses.fr/2019PA01E056.

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Cette thèse étudie la façon dont les sociétés utilisent, entretiennent et préservent les ressources naturelles qui façonnent fondamentalement le bien-être de l'humanité, l'environnement et l'économie. Les liens entre la prospérité économique, ressources et impacts environnementaux et la protection environnementale sont complexes et variés. Cela signifie que, si toutes ces dimensions ne sont pas prises en compte dans l'élaboration des politiques publiques, tout progrès dans la réalisation des ambitions dans ces domaines peut être entravé par des conséquences négatives. Une question importante d

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32

Gera, Geetanjali. "Motor abundance contributes to resolve multiple task constraints." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 109 p, 2009. http://proquest.umi.com/pqdweb?did=1885754581&sid=5&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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33

Ritchey, Adam M. "The Abundance of Boron in Diffuse Interstellar Clouds." Connect to full text in OhioLINK ETD Center, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1250896589.

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Dissertation (Ph.D.)--University of Toledo, 2009.<br>Typescript. "Submitted to the Graduate Faculty as partial fulfillment of the requirements for the Doctor of Philosophy Degree in Physics." Bibliography: leaves 113-121.

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34

Dennis, Emily Beth. "Development of statistical methods for monitoring insect abundance." Thesis, University of Kent, 2015. https://kar.kent.ac.uk/49079/.

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During a time of habitat loss, climate change and loss of biodiversity, efficient analytical tools are vital for population monitoring. This thesis concerns the modelling of butterflies, whose populations are undergoing various changes in abundance, range, phenology and voltinism. In particular, three-quarters of UK butterfly species have shown declines in their distribution, abundance, or both over a ten-year period. As the most comprehensively monitored insect taxon, known to respond rapidly and sensitively to change, butterflies are particularly valuable, but devising methods that can be fi

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35

Holt, Alison R. "Positive interspecific abundance occupancy relationships : a test of mechanisms." Thesis, University of Sheffield, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246979.

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36

PALLA, MARCO. "Cosmic Chemical and Dust Evolution." Doctoral thesis, Università degli Studi di Trieste, 2022. http://hdl.handle.net/11368/3014976.

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In this Thesis, we investigate the chemical and dust evolution of the different galactic environments we encounter during the cosmic history, from the high-redshift Universe to the Milky Way. The study of the evolution of galaxies is performed by means of detailed chemical evolution models that predict the abundances of single chemical elements in the interstellar medium as well as the condensation into dust of the chemical elements. In the first part of the Thesis, we concentrate on the study of moderate to high-redshift systems. We start focusing on high-redshift starburst galaxies, whose e

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37

Yimingniyazi, Wuernisha. "Relic abundance of WIMPs in non-standard cosmological scenarios." [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=985383542.

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Ambroso, Stefano. "Distribution patterns and abundance of Antarctic pristine benthic communities." Doctoral thesis, Universitat Politècnica de Catalunya, 2021. http://hdl.handle.net/10803/671472.

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Knowledge of the abundance, distribution patterns, and population ecology of antarctic benthic biodiversity have increased considerably during the last decades. Antarctic marine benthic biodiversity has been sampled primarily in areas close to research stations and mainly at shallow depths since more than 100 years using a range of sampling methods, including benthic sleds or trawls and grabs each of which targets a particular community or habitat. Recent technological advances and increased availability of remotely operated vehicles (ROVs), manned submersibles, and video equipped towed gears

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39

Ward, Richard Miles Peary. "Behavioral responses of lynx to declining snowshoe hare abundance." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25065.

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The behavioral responses of lynx (Lynx canadensis) to declines in snowshoe hare (Lepus americanus) abundance were examined in the southwestern Yukon. Between April 1982 and June 1984 11 lynx were radio-tagged and monitored within and near the Kluane Game Sanctuary. Lynx mean home range size increased from 13.2 to 39.2 km² concurrent with a decline in snowshoe hare abundance from 14.7 to 0.2 hares/ha. Below about 0.5 hares/ha several lynx abandoned their home ranges and became nomadic, although they remained within the general study area. Track transects through areas known to have different sn

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40

Tzaras, Aspasia. "The factors controlling heterotrophic flagellate abundance in temperate lakes." Thesis, University of Ottawa (Canada), 1994. http://hdl.handle.net/10393/10361.

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The "microbial loop" of aquatic systems consists of picoplankton (heterotrophic and photosynthetic), nanoflagellates (heterotrophic and mixotrophic forms), and ciliates. Heterotrophic flagellates (HNAN) are considered to be the principal grazers of both photosynthetic picoplankton (PICO) and heterotrophic bacteria (HBAC). The factors controlling PICO and HBAC abundances have been studied extensively. However, the factors which regulate HNAN remain less clear. An experimental study was conducted to examine the effects of nutrients and planktivorous fish additions on HNAN in freshwater systems u

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41

Simpson, Jeffrey David. "Stellar elemental abundance determination using a Fabry-Pérot Interferometer." Thesis, University of Canterbury. Department of Physics and Astronomy, 2009. http://hdl.handle.net/10092/2684.

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The Fabry-Pérot interferometer (FPI) was investigated as a potential tool for determining stellar elemental abundances. The FPI is a tunable narrow-band filter that makes it possible to obtain hundreds of stellar spectra simultaneously without the overhead associated with other multi-object spectroscopy techniques. This thesis used simulations and previously acquired data to investigate the FPI and develop data reduction techniques. Using observations of a CaII spectral line, an algorithm was created for fitting a Voigt profile to the spectrum segments. The values for radial velocity & equiva

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42

Destun, Krystofer J. "Mapping stream fish distribution and abundance from riparian vegetation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ35882.pdf.

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Yang, Jeng-Feng. "Motor learning and adaptation the role of motor abundance /." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 216 p, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3247585.

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Jensen, Adam G. "Updated interstellar abundance studies and implications for dust models." Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3256457.

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White, T. C. R. White T. C. R. "Role of nitrogen in limiting the abundance of animals /." Title page, contents and abstract only, 1999. http://web4.library.adelaide.edu.au/theses/09ACD/09acdt588.pdf.

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Thesis (D.Sc.) -- University of Adelaide, Dept. of Applied and Molecular Ecology, 1999.<br>Copy of his monograph "The inadequate environment : nitrogen and the abundance of animals" in back pocket. Includes bibliographic references.

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46

Nishioka, Shuichiro. "Technology, productivity and knowledge in the factor abundance model." Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3273684.

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Johansson, Ulf. "Stream channelization effects on fish abundance and species composition." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-97292.

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Streams are important habitats, providing shelter and feeding opportunities for a wide range of organisms. The species depending on running waters includes a wide array of fish species, using these waters for their whole or parts of their lifecycle. Streams are also the subject of different anthropogenic impact, e.g. hydropower development. Hydropower development usually means lost connectivity, altered flow regimes and channelization. Channelization is one of the major factors causing stream habitat loss and degradation and thereby a threat to biodiversity of running waters. In the present st

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48

Morin, Antoine. "Estimation and prediction of black fly abundance and productivity." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75447.

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Sampling and analytical techniques to estimate abundance and productivity of stream invertebrates are examined for their precision and accuracy, and then utilized to develop empirical models of sampling variability, abundance, and growth rates of overwintering larvae of black flies (Diptera: Simuliidae). Sampling variability of density estimates of stream benthos increases with mean density, and decreases with sampler size. Artificial substrates do not consistently reduce sampling variability, and introduce variable bias in estimates of simuliid density. Growth rates of overwintering simuliids

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Feldman, Richard. "Toward a theory of abundance at large spatial scales." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=104707.

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Fundamentally, ecology is the study of the diversity, distribution, and abundance of organisms. Recent advances in technology coupled with expanding research goals have lead to studies of how the first two of these properties vary over large spatial scales. There has been relatively few cases documenting large scale spatial variation in abundance and very little theoretical development explaining such variation. Yet a general pattern exists: a species is abundant in very few places and rare in most places in its range. Current theory suggests that such a pattern of abundance reflects underlyin

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Baldridge, Elita. "A data-intensive assessment of the species-abundance distribution." Thesis, Utah State University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3700756.

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<p> The hollow curve species abundance distribution describes the pattern of large numbers of rare species and a small number of common species in a community. The species abundance distribution is one of the most ubiquitous patterns in nature and many models have been proposed to explain the mechanisms that generate this pattern. While there have been numerous comparisons of species abundance distribution models, most of these comparisons only use a small subset of available models, focus on a single ecosystem or taxonomic group, and fail to use the most appropriate statistical methods. Th

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