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Дисертації з теми "Ant nest density"

Автор: Grafiati

Опубліковано: 7 червня 2025

Оновлено: 2 серпня 2025

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1

Pruett, Michael Shane Thompson Frank R. Heitmeyer Mickey E. "Avian nest survival and breeding density in cottonwood plantations and native forest fragments in southeast Missouri." Diss., Columbia, Mo. : University of Missouri--Columbia, 2008. http://hdl.handle.net/10355/7116.

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Title from PDF of title page (University of Missouri--Columbia, viewed on Feb. 24, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Dr. Frank Thompson and Dr. Mickey Heitmeyer, Dissertation Supervisors. Vita. Includes bibliographical references.

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2

Davidson, Jonathan. "Advanced thermal modelling and management techniques to improve power density in next generation power electronics." Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/8419/.

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This thesis sets out a series of new techniques to improve the thermal management of power electronics. The work is motivated by the increasing impetus to design smaller, more energy efficient electronic power systems for a range of applications, notably electric vehicles. Thermal management is an increasingly important tool which can facilitate improvements in power density through better monitoring and control of system temperatures. This thesis seeks to deliver improvements in implementing this strategy. A review of the state of the art in thermal management is reported, focussing on temper

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3

Gunnarsson, Gunnar. "Survival patterns and density-dependent processes in breeding mallards Anas platyrhynchos." Doctoral thesis, Umeå : Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200712.pdf.

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4

Dinkins, Jonathan B. "Common raven density and greater sage-grouse nesting success in southern Wyoming| Potential conservation and management implications." Thesis, Utah State University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3587560.

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<p> My research was focused on greater sage-grouse (<i> Centrocercus urophasianus</i>; hereafter "sage-grouse") nest-site selection, nest success, and hen survival in relation to avian predators. The trade-off between using habitat and avoiding predators is a common decision for prey species including sage-grouse. In Chapter 2, I compared avian predator densities at sage-grouse nest and brood locations to random locations. Sage-grouse were located where densities of small, medium, and large avian predators were 65-68% less than random locations. </p><p> The effects of anthropogenic and lan

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5

Mobberley, Sean David. "Quantitative assessment of scatter correction techniques incorporated in next generation dual-source computed tomography." Thesis, The University of Iowa, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1540384.

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<p> Accurate, cross-scanner assessment of in-vivo air density used to quantitatively assess amount and distribution of emphysema in COPD subjects has remained elusive. Hounsfield units (HU) within tracheal air can be considerably more positive than -1000 HU. With the advent of new dual-source scanners which employ dedicated scatter correction techniques, it is of interest to evaluate how the quantitative measures of lung density compare between dual-source and single-source scan modes. This study has sought to characterize in-vivo and phantom-based air metrics using dual-energy computed tomogr

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6

Thong, Paul. "The Energy+ Skyscraper: A Critical Investigation, Rethinking, and Redesign of the Sustainable Tower Typology." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1463130800.

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7

Hörnfeldt, Birger. "Cycles of voles, predators, and alternative prey in boreal Sweden." Doctoral thesis, Umeå universitet, Ekologi och geovetenskap, 1991. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-100711.

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Bank voles, grey-sided voles, and field voles had synchronous 3-4 year density cycles with variable amplitudes which averaged about 200-fold in each species. Cycles of vole predators (red fox and Tengmalm's owl), and their (foxes') alternative prey (mountain hare and forest grouse) lagged behind the vole cycles. The nomadic Tengmalm's owl responded with a very rapid and strong numerical increase to the initial cyclic summer increase of voles (the owl’s staple food). Owl breeding densities in the springs were highly correlated with vole supply in the previous autumns. This suggested that the nu

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8

Machala, David. "Vývoj nového samonosného zateplovacího systému s ohledem na dynamické namáhání." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226705.

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This diploma thesis deals with suggestion of self-supporting insulating system that can be used for objects which insulating is more or less complicated. In this thesis are theoretically processed information about insulation systems while focus is on their structure, composition and principle of operation. Further, there is theoretically designed self-supporting insulating system which is practically built after theoretically composed testing for finding its basic properties. The most appropriate process of realization is formulated at the end after evaluation of the individual tests.

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9

Pereira, Daniel Santiago. "Estudo do Potencial de Produção de Néctar da Jitirana Branca (Merremia Aegyptia) em Área de Caatinga no Sertão Central em Quixeramobim-Ce." Universidade Federal Rural do Semi-Árido, 2008. http://bdtd.ufersa.edu.br:80/tede/handle/tede/321.

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Made available in DSpace on 2016-08-15T20:30:57Z (GMT). No. of bitstreams: 1 DanielSP_DISSERT.pdf: 1561196 bytes, checksum: b284038c0016d3ae3285d101b795f237 (MD5) Previous issue date: 2008-07-25<br>Néctar; entomofauna; Merremia aegyptia<br>O objetivo deste trabalho foi o de investigar se os diferentes horários de coleta de néctar em áreas apícolas influenciam no volume, concentração de açúcar e açúcar total produzido por suas flores, no momento da antese, bem como verificar possíveis alterações nas características do néctar ao longo do tempo e discutir as conseqüências no potencial apícola d

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10

Kang, Chia-Mei, and 康嘉梅. "Measurement of the Zeta Potential and Net Charge Density of Membranes." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/56972570843589424233.

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碩士<br>中原大學<br>化學工程研究所<br>94<br>ABSTRACT It has been recognized that the charge of membrane plays an important role in the performance of membrane separation, and so there is much interesting in charactering the charge of membrane. However, there is still an inadequate knowledge in the technique for measuring the membrane charge. In this study, the solution conductivity in the fine pore was measured and used to determine the zeta potential in membrane pore. Experiments of electroosmosis and streaming potential were implemented to determine the zeta potential of PC and PVDF membranes.

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11

Renfrew, Rosalind B. "The influence of patch and landscape characteristics on grassland passerine density, nest success, and predators in southwestern Wisconsin pastures." 2002. http://www.library.wisc.edu/databases/connect/dissertations.html.

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12

Beksinska, Malgorzata Elzbieta. "Bone mineral density and use of depot medroxyprogesterone acetate (DMPA), norethisterone enanthate (NET-EN) and combined oral contraceptives." Thesis, 2010. http://hdl.handle.net/10539/8806.

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PhD, Faculty of Health Sciences, University of the Witwatersrand<br>Many studies have shown a negative effect of depot-medroxyprogesterone acetate (DMPA) hormonal contraception on bone mineral density (BMD) in women. There is limited information on the effect of norethisterone enanthate (NET-EN) on BMD and the effect of combined oral contraceptives (COCs) on BMD is inconclusive, however emerging evidence is showing that low-dose COCs maybe detrimental to BMD in young women. The aim of this research was to evaluate, in a 5-year follow-up study, the possible effect of DMPA, NET-EN and COCs

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13

Saraç, Abdulhamit. "Net Burgers Density Vector Fields in Crystal Plasticity: Characteristic Length Scales and Constitutive Validation." Thesis, 2014. https://doi.org/10.7916/D8CV4GBV.

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This PhD thesis consists of five complementary chapters. Chapters 2 through 4 constitute the basis of research papers to be published subsequently. These three chapters summarize the state of a single crystal undergoing elastoplastic deformation. The studies presented in this thesis primarily deal with experimental and computational concepts that enable the calculation, measurement and extraction of the spatially resolved net Burgers density vector and the geometrically necessary dislocation densities (GNDs), which reveal the small scale continuum characteristics of a single crystal in the ela

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14

"Maximizing net income for pork producers by determining the interaction between dietary energy concentration and stocking density on finishing pig performance, welfare, and carcass composition." Thesis, 2014. http://hdl.handle.net/10388/ETD-2014-11-1846.

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Marketplace volatility in the pork industry demands that producers re-evaluate production practices in order to remain profitable. Stocking density and dietary energy concentration independently affect performance and economic returns of growing finishing pigs. However, there is limited information on whether the interaction between these two factors is important for optimizing productivity and maximizing economic returns. The objective of this study was to determine if the dietary energy concentration that maximizes performance and economic returns varies with stocking density. Treatments wer

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15

Viste-Sparkman, Karen. "White-breasted nuthatch density and nesting ecology in oak woodlands of the Willamette Valley, Oregon." Thesis, 2005. http://hdl.handle.net/1957/890.

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Graduation date: 2006<br>Habitat loss causes a reduction in available resources for wildlife, alters the configuration of remaining habitat, and may isolate wildlife populations. White-breasted nuthatches (Sitta carolinensis) are experiencing long-term population declines in the Willamette Valley of Oregon, where they are historically associated with oak woodlands. As secondary cavity-nesters, white-breasted nuthatches may be limited by the availability of existing cavities for nesting and roosting. Oak vegetation in the Willamette Valley has changed since European-American settlement times

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16

Stupka, Robert. "The Impact of Neighbourhood Density on the Energy Demand of Passive Houses and on Potential Energy Sources from the Waste Flows and Solar Energy." Thesis, 2010. http://hdl.handle.net/1807/25813.

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This study demonstrates how the density of a neighbourhood affects its energy demand, metabolism (energy and material flows) and its ability to produce its own energy. Single-family detached houses and row townhouses were each modeled using passive solar housing guidelines with the DesignBuilder building energy simulation software. Energy demand is then modeled within neighbourhoods at two densities based on south facing windows fully un-shaded at 9:00 am, and 12:00 pm solar time on Dec. 21. The neighbourhood metabolisms were then calculated based on location and density. The potential energy

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17

Richards, Stephen Malone. "Investigation and application of methods for ancient DNA research." Thesis, 2015. http://hdl.handle.net/2440/100765.

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The introduction of high throughput sequencing (HTS) in 2005 caused a revolution in the field of ancient DNA (aDNA). Using the large sequencing capacity of HTS, researchers have overcome the abundant environmental contamination present in most aDNA extractions to reconstruct the genomes of long extinct organisms, such as an archaic horse that perished >500,000 years ago. The proliferation of genomes engendered by HTS has also led to the development of potential ancillary technologies for aDNA research such as genotyping microarrays. In this thesis, HTS and genotyping techniques were developed

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18

Pawlowski, Sylwin. "Experimental and modeling studies on reverse electrodialysis for sustainable power generation." Doctoral thesis, 2015. http://hdl.handle.net/10362/15271.

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A potentially renewable and sustainable source of energy is the chemical energy associated with solvation of salts. Mixing of two aqueous streams with different saline concentrations is spontaneous and releases energy. The global theoretically obtainable power from salinity gradient energy due to World’s rivers discharge into the oceans has been estimated to be within the range of 1.4-2.6 TW. Reverse electrodialysis (RED) is one of the emerging, membrane-based, technologies for harvesting the salinity gradient energy. A common RED stack is composed by alternately-arranged cation- and anion-ex

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19

Lenoir, Katherine Judith. "Climate Warming and Drought Effects on Pinus and Juniperus Species: Contrasting Drought Tolerance Traits Limit Function and Growth in Tree Seedlings." Thesis, 2013. http://hdl.handle.net/1969.1/149520.

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Junipers and pines exhibit contrasting patterns of growth decline and mortality with climate change-type warming and drought; yet, the underlying physiological mechanisms are not fully understood. Does warming exacerbate the effects of drought on gas exchange physiology and growth? Do the combined effects of drought and warming differ for pines and junipers? To what extent do isohydric vs. anisohydric responses to water limitation in pines and junipers constrain net leaf CO2 exchange and plant growth response to drought and warming? To address these questions, we compared responses of leaf gas

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20

Link, Roman Mathias. "The role of tree height and wood density for the water use, productivity and hydraulic architecture of tropical trees." Thesis, 2020. http://hdl.handle.net/21.11130/00-1735-0000-0005-13EF-9.

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21

Abou, Rajab Yasmin Joana Monna. "Shade trees in cacao agroforestry systems: influence on roots and net primary production." Doctoral thesis, 2015. http://hdl.handle.net/11858/00-1735-0000-002B-7C03-E.

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