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 35 for “"Color Patterns"”.
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Assessment of anthropocentric representations of color patterns for biological relevance
Studying animal coloration is a notoriously difficult task as animals differ in their visual system properties (number of cone cells, spectral sensitivities of cone cells, filtering properties of ocular media, etc.) and thus may perceive and respond to stimuli differently than we do. These …
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Mathematical quantification and statistical analysis of bombus (hymenoptera:apidae) dorsal color patterns
… evolutionary adaptation and visual signaling via color patterns since Fritz Müller first noticed it among Amazonian Heliconius butterflies. It has been documented in a wide variety of taxa, vertebrate and invertebrate alike, from birds to Chauliognathus beetles and bees. In bumble bees (Bombus), …
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Colorful eggs and plumage in birds: ecological drivers of color patterns filtered through bird visual systems
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-12-01
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Early patterns of Andean diversification, genomic and color patterns variation across the Metallura tyrianthina complex of the Northern Andes
… los Andes que resultó en siete subespecies con coloración variable. En este estudio corroboramos y ampliamos los hallazgos de estudios previos sobre evolución del colibrí Metallura Tyria en Colombia, mediante un muestreo reducido del genoma (NextRAD) y valoraciones cuantitativas de coloración. …
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Lenticular Objects: 3D Printed Objects with Lenticular Lens Surfaces That Can Change their Appearance Depending on the Viewpoint
… lens distribution and the corresponding surface color patterns, we can determine which appearance is shown to the user at each viewpoint. We built a 3D editor that takes as input the 3D model, and the visual appearances, i.e. images, to show at different viewpoints. Our editor then calculates the …
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Avian diet and visual perception suggests avian predation selects for color pattern mimicry in bumble bees
… local bumble bee species tend to share the same color patterns. Statistical confirmation of these trends has resulted in the hypothesis that these similarity groups are Müllerian mimicry rings. Bumble bee color patterns are thought to convey protection from avian predators, thus creating …
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Two races of Etheostoma flabellare flabellare Rafinesque from the Roanoke River of Virginia and the Neuse River of North Carolina
… characters (scalation, ray counts, and color marks). For eight characters, the Roanoke sample has been divided into its component groups (the Blackwater and Pigg river samples). These are compared to each other and to the Neuse sample. Four new characteristics are described. The shape of …
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Hiding in plain sight: unveiling cryptic diversity and patterns in bumble bees
… centuries. The distributions and the vibrant color patterns of nearly all species of bumble bees are well mapped and described. In addition, the natural history, colony structure and social behavior of bumble bees are well documented and a well-supported phylogeny of the ~250 species currently …
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Genetic Divergence Among Subspecies of Basilarchia Arthemis
… more complex than a transition between alternate color-patterns, and is consistent with a common pattern of post-Pleistocene secondary contact between sister taxa of a variety of organisms, notably the tiger swallowtail butterflies Papilio glaucus L. and P. canadensis Rothschild and Jordan. The …
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Gene Mapping of Morphological Traits in Chickens
… morphological traits including 4 intra-feather color patterns (Pattern, Columbian, Melanotic, and mottling), 2 inter-feather color patterns (Blue and chocolate), 2 forms of feathered-legs, polydactyly, dark brown eggshell color, vulture hock, and creeper. Ten backcross and/or F2 populations were …
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Physically Realistic Rendering of Complex Materials Using Wave optics
… hair is much dimmer than it is in real life and colorful glints are missing in dark animal fur. To improve the realism of visual effects and VR/AR applications, advanced material models that consider the wave nature of light are essential. This dissertation includes two wave based fiber …
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Molecular characterization and effect of diagenesis and maturation of melanin in the fossil record
… precursors: eumelanin (dark brown-black in color) and pheomelanin (orange-red in color). Both eumelanin and pheomelanin are complex highly cross-linked biopolymers, being comparable to biomolecules like chitin that are resistant to microbial degradation and diagenetic alteration thereby …
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Tests of Adaptive Coloration Hypotheses for Madtom (Notorus) Catfishes (Siluriformes: Ictaluridae)
… such as stings, toxins, and camouflage color patterns. Madtoms, Noturus, are diminutive catfishes with dorsal and pectoral stings. Thirteen of the 25 nominal species have serrated spines in the pectoral sting and a contrasting pigment pattern. Behavior of two saddled species, N. miurus …
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An experimental comparison of thermal discharges to a waterway by a single jet and by a multiple port diffuser
… heated discharges were taken to record flow patterns. Second, the temperature field in the receiving stream was measured with thermocouple probes. Third, thermographic color patterns were developed with sheets of liquid crystals, and photographed in color. The results showed that the multiple …
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Systematic Studies of the Orangethroat Darter, Etheostoma Spectabile, Complex (Percidae: Subgenus Oligocephalus)
… Each of the newly recognized species has unique color patterns on the breeding males and diagnostic modes for various meristic counts. These eleven species, along with populations putatively recognized as E. s. pulchellum, E. s. spectabile, and E. s. squamosum comprise a monophyletic group that …
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Coloring time with CodaChrome
… adults to design and build interactive, dynamic color patterns on electronic jewelry and sculptures. We designed activities to introduce CodaChrome, our color pattern creation environment, along with ideas about color and material properties to children in the context of immersive design …
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Aspect of the biology of sod webworms (Lepidoptera: Pyralidae: Crambinae) and turfgrass inhabiting insects of Virginia
… can be identified to species level by forewing color patterns. The species complex is distributed nearly evenly throughout Virginia with some species adapted to higher elevations (700m). The species complex is present from spring to late fall. The number of generations and peak flight periods …
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Practical color-based motion capture
… Our approach uses one or more webcams and a color garment to track either the user's upper body or hands for motion capture and user input. We demonstrate that custom designed color garments can simplify difficult computer vision problems and lead to efficient and robust algorithms for hand …
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Chromosomal complements and variation in some Venezuelan annual killifishes (cyprinodontidae)
… of the latter although divergent in male color patterns, did not differ karyotypically. All species examined, except <u>Rivulus stellifer</u>, departed from the presumptive ancestral teleost diploid number of 48. The degree of chromosomal variation appears not to be as high among the New …
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A Study of Bovine Noseprints
… The method of identifying the broken color breeds, such as Guernseys, Holsteins, and Ayrshires, is by a sketch of the color patterns which accompanies the application for registration. This has been fairly successful, but due to the poor drawing ability of the applicant approximately …
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