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.
Results
Showing 1 to 20 of 4887 for “"marine"”.
-
Marine Invasive Species in the Galapagos Marine Reserve
Marine biological invasions have increased significantly in recent years due to global trade, transport and tourism. Invasions occur when species get transported from one region to another and establish themselves in the new habitat. These species compete for space and resources, displacing native …
-
Offshore marine visualization
… computer and graphics technologies. Contemporary marine visualization systems still use outdated 2D representations of vessels positioned on digital charts and the potential for using 3D computer graphics for interacting with multidimensional marine data has not been fully investigated.This thesis …
-
Marine biological valuation as a decision support tool for marine management
Marine environments are currently experiencing intense pressures from both natural and anthropogenic impacts. Marine policy makers are therefore searching new ways to manage the sea in a sustainable way. This thesis describes the development and application of a biological instrument that can be …
-
Marine optics: field radiometry
In situ optical radiometric methods for the determination of seawater apparent optical properties are comprehensively addressed with the final objective of quantifying measurement uncertainties for remote sensing applications. Emphasis is placed on the presentation and assessment of calibration and …
-
The Marine Cyanate Cycle
… to serve as a nitrogen and carbon source for marine microbes. Evidence from genomes and culture studies indicated that several marine cyanobacterial groups, including representatives of the globally important genera Synechococcus and Prochlorococcus, might be capable of cyanate assimilation. …
-
The Marine Corps subculture
… analyzes the subculture within the United States Marine Corps. It attempts to bring the traditional literature of criminal subculture and the subculture of violence together with literature of occupational subculture to explain many of the behaviors exhibited by Marines.
-
Organic nitrogen uptake by marine algae: consequences for marine ecosystem functioning and biodiversity
… a major pool of fixed, reactive nitrogen in marine systems. It is now recognized that this pool can support primary production and the ability of some algal species to exploit DON compounds as sources of Nitrogen (N) may indicate that specific DON components can exert selective pressure on …
-
Dynamic energy budgets and bioaccumulation : a model for marine mammals and marine mammal populations
… energy can bioaccumulate and harm individuals. Marine mammals are particularly vulnerable because of their large energy requirements, and transfer of energy and toxicants from mothers to their young during gestation and lactation. Dynamic energy budget (DEB) models for energy assimilation and …
-
Dynamic energy budgets and bioaccumulation : a model for marine mammals and marine mammal populations
… energy can bioaccumulate and harm individuals. Marine mammals are particularly vulnerable because of their large energy requirements, and transfer of energy and toxicants from mothers to their young during gestation and lactation. Dynamic energy budget (DEB) models for energy assimilation and …
-
The marine geochemistry of methane
In the highly productive coastal surface waters near Walvis Bay, methane is present in concentrations considerably above those which would be predicted from solubility equilibrium with the atmosphere. A one dimensional diffusive model and a one dimensional horizontal advection diffusion model were …
-
Geobiology of marine magnetotactic bacteria
… in the suboxic to anoxic zones of stratified marine environments worldwide. Their population densities (up to 105 cells ml−1) and high intracellular iron content suggest a potentially significant role in iron cycling, but very little is known about their population dynamics and regulation by …
-
The marine biogeochemistry of molybdenum
… Laboratory culture work on two Nz fixing marine cyanobacteria, Trichodesmium and Crocosphaera, and a marine facultative denitrifier, Marinobacter hydrocarbanoclasticus, showed that Mo cell quotas in these organisms were positively correlated with Mo-containing enzyme activity. Mo …
-
Salt In The Deep Marine
… <p>Rachel Allison Bollinger: Salt in the Deep Marine</p> <p>(Under the direction of Dr. Christine Butterworth-McDermott and Dr. John McDermott)</p> <p>The surface tension present between liquid and air is due to the fact that liquid molecules are highly attractive to one another. Because of …
-
Lipid Biomarkers for Marine Fungi
Marine fungi play key roles as parasites and saprotrophs in marine ecosystems and are important degraders of organic matter. They likely facilitate the remineralisation of marine carbon, thus have a profound impact on marine biogeochemical cycles. However, as little is known about their global …
-
Target Tracking Via Marine Radar
… The algorithms are tested on simulated data and marine radar data in radR to compare the effects of the developed tracker models with the conventional methods in radR. The hybrid algorithm is shown to have better performance over the other models in the case of simulated track for some …
-
The Marine Geochemistry of Selenium
<p>A fluorometric method for the determination of Se (IV) and total selenium in natural waters has been developed and optimized. The detection limit is about 20 pM for both analyses using a one liter sample. The precisions were about 2 % at 338 pM for Se (IV) and at 234 pM for total selenium.</p> …
-
Iodate Transformation By Marine Phytoplankton
… of iodate to iodide. Six cultures of marine phytoplankton: <em>Skeletonema costatum, Dunaliella tertiolecta, Amphidinium carterae, Tetraselmis levis, Emiliania huxleyi, and Synechococcus sp.</em> , have been examined for their ability to take up and reduce iodate under a reduced …
Page 1 of 245