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 20 of 1181 for “"extinction"”.
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Drive Shifts During Extinction: Effects on Extinction and Spontaneous Recovery of Bar Pressing Behavior
Made available in DSpace on 2014-12-08T23:01:13Z (GMT). No. of bitstreams: 1 6503595.pdf: 2264157 bytes, checksum: 7ec9a7ab7b6d9b5c60499f58a29ccee6 (MD5) Previous issue date: 1964
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Modelling interstellar extinction in stellar populations
… determination of the magnitude of interstellar extinction is critical, due to its effect on the observed brightness and colour of the stars. Extinction is therefore an important factor in deriving scientific information from the colour-magnitude diagrams (CMDs) of stellar populations. The …
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The extinction of the rudist bivalves
… decline, resulting eventually in the complete extinction of the group. <br></br><br></br>Theories as to the cause of that extinction should clearly be based upon a knowledge of the detailed pattern of the decline. Most important is the question of the timing of the extinction: How long did it …
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Evolutionary dynamics of speciation and extinction
… how an evolving population responds to extinction stress could be key to saving endangered ecosystems. With a neutral, agent-based model that incorporates the main principles of Darwinian evolution, such as heritability, variability, and competition, the dynamics of speciation and …
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Mathematical Models and Extinction in Learning
Made available in DSpace on 2014-12-08T23:01:08Z (GMT). No. of bitstreams: 1 6500837.pdf: 4890281 bytes, checksum: db4b21f5a120735e80a0252db9bafda6 (MD5) Previous issue date: 1964
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The Mechanism of Lean Limit Flame Extinction
Made available in DSpace on 2014-12-14T04:42:06Z (GMT). No. of bitstreams: 1 8108695.pdf: 8908805 bytes, checksum: bb035bc0304e8074193ac1860cd416a4 (MD5) Previous issue date: 1980
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Extinction in turbulent swirling non-premixed flames
This thesis investigates the localized and global extinction in turbulent swirling non-premixed flames with Large Eddy Simulation (LES) and sub-grid scale Conditional Moment Closure (CMC) model. The first part of this thesis describes the derivations of the three dimensional conservative CMC …
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The causes of avian extinction and rarity
Biological extinction rates have escalated by as much as 1000 times the background extinction rate over the last 1500 years, causing concern over the long-term survival of many species. Avian extinctions since 1600 have been well documented relative to other taxa, as have current levels of avian …
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The causes of avian extinction and rarity
Biological extinction rates have escalated by as much as 1000 times the background extinction rate over the last 1500 years, causing concern over the long-term survival of many species. Avian extinctions since 1600 have been well documented relative to other taxa, as have current levels of avian …
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My responsibility in the face of mass extinction
Extinction is the “irreversible condition of a species or other group of organisms having no living representatives in the wild, which follows the death of the last surviving individual of that species or group” (Hine and Martin 2015g, para. 1). Mass extinctions are extinctions of the greatest …
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Escape variables and avoidance conditioning : two extinction processes
Thesis (M.A.)--Michigan State University. Dept. of Psychology, 1967
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Dynamic Mutation Rates and Extinction in Sexual Organisms
… small populations and decreases the mean time to extinction.
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Translational Analysis of Extended Extinction Effects on Resurgence
… increased exposure of the target behavior to extinction following the initial training phase. The purpose of the current study was to replicate and extend LeCompte by comparing levels of resurgence obtained from three-phase and four-phase resurgence procedures via within-subjects design with …
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Telehealth Caregiver Training: Treating Food Selectivity without Extinction
… caregivers to implement an alternative to escape extinction feeding intervention in their home to treat their child’s food selectivity. All three caregivers demonstrated high levels of correct performance following training and all children demonstrated increases in the number of bites consumed …
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Modeling ignition and extinction in condensed phase combustion
The characteristics of ignition and extinction in thermites and intermetallics are a subject of interest in developing the latest generation of energetic materials. An experimental “striker confinement” shock compression experiment was developed in the Prof. Glumac’s research group at the …
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Learning Processes in the Extinction of Taste Aversions
Made available in DSpace on 2014-12-13T18:22:10Z (GMT). No. of bitstreams: 1 7915336.pdf: 4611829 bytes, checksum: 6dfd855590aa1914d5d46f5a43c29596 (MD5) Previous issue date: 1979
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Celia's Ghosts: Liminality and Authenticity in De/extinction
What might it mean if extinction doesn’t last forever? This thesis grapples with that question through the case of the bucardo, an endemic subspecies of ibex from the Pyrenees, Capra pyrenaica pyrenaica. The bucardo has long been an emblematic feature of the Pyrenean landscape. Hunting drove it to …
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Dopaminergic modulation of basolateral amygdala for fear extinction
The extinction of conditioned fear responses is crucial for adaptive behavior, and its impairment is a hallmark of anxiety disorders such as post-traumatic stress disorder. During fear extinction learning, a new memory is formed in basolateral amygdala (BLA) reward neurons, which inhibits the BLA …
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Time dependent non-extinction probability for fast burst reactors
… solving an equation that describes the non-extinction probability in a prompt critical assembly when the population is so low that it deviates from the average behavior. A zero dimensional (0-D) model is derived to describe the neutron non-extinction probability in a system where the …
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