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 25 for “"size limit"”.
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The Effects of Minimum Size Limit Regulations On Exploited Fish Populations off the Atlantic Coast of the Southeastern United States
… though primarily managed with minimum size limits. Minimum size limits vary by species and are intended to protect small fish in order to restrict harvest and prevent growth overfishing. Disadvantages of minimum size limits may include sublegal-size bycatch of co-occurring species, …
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Envelope Analysis of Speed-Controlled eVTOL Urban Air Mobility Vehicles
… Based on these vehicles, it is hypothesized that there exists a size limit for speed-controlled propellers/rotors in terms of propeller/rotor diameter. To investigate this, a scaling method was created to allow for a vehicle to be created without being based on a specific mission or …
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Modelling the effect of alternative management strategies on the catch and effort in the carpenter (Argyrozona argyrozona) linefishery
… Catch (TAC), as well as revised minimum size limit and closed season – on a stock found at a dismal 19.2% of carrying capacity, are projected using this model on a monthly time-step. The objectives of this fishery are to achieve a biomass in the final year equal to the biomass found at a …
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Mitigating Undercutting Attacks: A Study on Mining and Transaction Fee Behavior
… For instance, they assumed that block size limits were large relative to the number of transactions and that all transactions had the same fee. This thesis aims to examine whether undercutting attacks would still be a threat under different mining dynamics. Specifically, we examine two …
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Implementation of dithering digital ripple correlation control for photovoltaic maximum power point tracking with windowed sensing
… imposed by efficiency, cost and component size limit the available PWM resolution of a power converter, and may in turn limit the MPP tracking efficiency of the photovoltaic (PV) system. In these scenarios, PWM dithering can be used to improve average PWM resolution. This thesis provides …
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Fishery, population dynamics and stock assessment of geelbek (Atractoscion aequidens), a commercially important migrant fish species off the coast of South Africa
… during austral summer. Due to current minimum size limits of 600 mm (total length, TL), well below the 50% size-at-maturity (950 mm TL), the majority of the catches are comprised of immature fish, making the stock vulnerable to growth overfishing. Adults (>5 years) migrate seasonally to spawn …
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Ultra-high-Q Microresonator with Applications towards Single Nanoparticle Sensing
… for real-time and label-free detection and size measurement of individual nanoparticles and viruses, with a theoretical size limit of R<10 nm. It enables us to cover a large range of virus and nanoparticle sizes of great interest for biomedicine, nanotechnology, and environmental science. …
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The Potential Future Impacts of Offshore Wind Energy Development and the Applicability of Size Limits for the Atlantic Surfclam, Spisula solidissima, Fishery in the U.S. Mid-Atlantic Continental Shelf
… of warming temperatures on the applicability of size limits for the surfclam fleet. Simulations reveal declines in landings, effort, and fishing mortality when restrictions apply within wind farm areas. In addition to spatial constraints, long-term warming trends continue to reshape the surfclam …
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Micro fluidic cytometry for analysis of marine microorganisms
… particles. Unfortunately, cost, complexity and size limit the widespread use of this technique for the study and monitoring of phytoplankton.<br/><br/>The objective of this research was to solve some of the above mentioned problems by developing a small device for deployment on remote underwater …
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III-V compound semiconductor selective area epitaxy on silicon substrates
… silicon is a way to solve the silicon feature size limit and power consumption problems given the high electron mobility that the III-V semiconductors have. Higher electron transport properties than silicon enable the electronic devices made of III-V materials to perform at higher switching …
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The effect of monochromatic light on the growth, food conversion, and survival of two strains of rainbow trout, Salmo gairdneri (Part I); Catfish farming as supplemental income in rural Virginia: use of catfish strains (Part II)
… be found in studies with a larger sample size. Although high variability and small sample size limit interpretation, this study suggests that certain light treatments used in conjunction with certain strains of fish could improve hatchery production.
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First-Principles Studies of Electronic, Optical and Defect Properties of Photovoltaic Materials
… relatively low efficiencies (12.6%) due to the limited open circuit voltage (Voc) caused by the prevalent anti-site structure disorder (e.g. Cu on Zn, Zn on Cu). A possible path forward to reduce this antisite disorder is to pursue materials in which the Cu/Zn combination is replaced by elements …
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Surface-enhanced Raman scattering of metal nanoparticle assembly in agarose and highly ordered metal nanorod arrays
… fabrication times force a practical upper size limit on the substrate, meaning it is exceedingly small which drastically reduces its potential for sensing applications. It also severely restricts the number of substrates which can be produced in a given time. This thesis addresses these …
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Correlation lengths, disorder, and dynamics of vortex matter as heard through the noise
… matter associated with the peak-effect. I emphasize five conclusions: (1) Traditional models of vortex dynamics relying on purely dynamical correlations, rigid bundles, or simple two-state channel flow are invalid in the peak regime of2H-NbSe₂. (2) The noise reflects vortex configurations …
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Fundamental Limits on Antenna Size for Frequency and Time Domain Applications
… reduction becomes more extreme. However, antenna size and performance are limited by radiation physics, not technology. In order to understand antenna radiation and energy storage mechanisms, classical and alternative viewpoints of radiation are discussed. Unlike the common sense of classical …
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Large Time Step and Overlapping Grids for Conservation Laws
… grids which have a fairly large range of cell sizes -- some cells may be relatively large compared to others which may be significantly smaller. For traditional finite volume methods, the smallest spatial cell size dictates the time step size limit when employing explicit time marching. …
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Quantum simulation beyond periodicity: A theoretical study of the many-body and topological properties of quasiperiodic systems
… are inherently subject to defects, finite grain size, and constantly subject to atomic vibrations. Together, these effects hamper the observation of truly quantum properties caused by their quasiperiodic atomic structure. In contrast, by shining intense laser light at specific angles onto …
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Maturation, Fecundity, and Spawning Frequency of the Albemarle/Roanoke Striped Bass Stock
… (A/R) stock has grown tremendously in size and age structure over the last twenty years necessitating an up-to-date maturity and fecundity schedule. The last study was conducted for the Albemarle Striped Bass Management Board in 1989-1990 by Olsen and Rulifson (1992) after the stock had …
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Global/local analysis of laminated panels with cutouts and cracks
… finite element codes which have a limited element library or have a problem-size limit because of the use of a memory-resident equation solver. This study focuses on the development of a simple and accurate global/local method for calculating the static response of simply-supported, …
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Kōura (Paranephrops planifrons) populations in the Te Arawa lakes: An ecological assessment using the traditional Māori tau kōura harvesting method and recommendations for sustainable management
… is well studied in New Zealand, there is limited published biological information on kōura in lakes. The lack of quantitative information on kōura abundance and ecology makes it difficult for iwi (Māori tribes) and government agencies to manage lake dwelling kōura populations. Until …
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