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 11 of 11 for “"swimming velocity"”.
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Male gamete morphology in relation to swimming velocity and fertilisation microenvironment
… is a relationship between sperm morphology and swimming velocity in terms of fertilisation success. In addition to this it is further assumed that longer sperm swim faster than shorter sperm. During competitive mating, when the ejaculate from two or more males compete to fertilise a given set of …
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Optimization of biomimetic propulsion in a fish like robot
… theory, an experimental process to obtain fish swimming velocity data for a number of different swim profiles, and the comparison of theoretical to experimental results. The robot constructed possesses a propulsive section with five short links capable of fitting the sinusoids produced by …
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An assessment of the kinematic and metabolic characteristics of the breaststroke.
… and metabolic responses of breaststroke swimming, including the effects of changing pace. Study 1 provided a description of competition swimming including rarely reported temporal elements (start time CST) to 15 m, turning times (IT s) for the 7.5 m ingress and 7.5 m egress, end time (ET) …
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Shedding light on E. coli phototaxis
… I will quantify the effect of light on E. coli swimming velocity and its potential implication. In Chapter 7, I will discuss how various external parameters affect E. coli phototaxis response. Finally, in Chapter 8, I will present some preliminary results and discuss potential future directions …
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The influence of controlled frequency breathing on blood lactate levels during graded front crawl stroke swimming
… rate, and stroke rate during front crawl stroke swimming. A maximal exertion test was used to determine peak swimming velocity. Based on this maximal test, five different workloads were used to compare CFB and normal breathing (NB). Subjects swam three-minute workloads at 55%,65%,75%, 85%, and …
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Microalgal swimming in fluid environments: experimental and numerical investigations
… cells exceeded the individual (flow subtracted) swimming velocity of Dunaliella. Further inspection of the swimming characteristics of Dunaliella under shear flow in a three-dimensional holography revealed that Dunaliella preferred to swim cross-stream (i.e. also the direction of local vorticity) …
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Physiological and behavioral responses, and their variability, in squid, Doryteuthis pealeii, embryos and paralarvae reared under chronic ocean acidification
… hatching days and the breeding season. I ran swimming behavior experiments with subsampled paralarvae from 2013 - 2015 and developed a novel 3D recording and analysis tracking system in the process. The 2D data from 2013 showed significant decreases in time spent near surface, while 3D data in …
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Underwater Robotic Propulsors Inspired by Jetting Jellyfish
… Utilizing the results from Chapter 2, a free-swimming jellyfish-inspired robot (named JetPRo) was developed (also utilizing an iris diaphragm) in Chapter 3 and characterized for relevant propulsive metrics. A combination of theoretical modeling and experimental analysis was used to optimize …
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Sperm Competition and the Function of Masturbation in Japanese Macaques (Macaca fuscata)
… an ejaculate was stored, the lower the sperm swimming velocity and percentage of vital sperm became. Based on this result, roughly two types of ejaculates could be distinguished and correlated with commonly known male mating strategies. Guarders tend to be older, high ranking males who have …
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The little engine that could: Characterization of noncanonical components in the speed-variable flagellar motor of the symbiotic soil bacterium Sinorhizobium meliloti
… function revealed that in the absence of FliL swimming is essentially abolished as is the presence of flagella on the cell body. Flagellar motor activity and swimming proficiency of mutants lacking the FliL-paralog MotF was nearly as abysmal as those without FliL but flagellation was …
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Morphological antipredator adaptations in water fleas
… At 20○C the difference was 20-45 %. A model of swimming predicted that, all else being equal, this difference should result in 18-20 % (at 5○C) or 14-16 % (at 20○C) lower swimming speed for E. c. gibbera than for E. longispina. This indicates substantial hydrodynamic costs of the morphological …