Dissertations / Theses: 'WEC Sea'

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Gravråkmo, Halvar. "Buoy Geometry, Size and Hydrodynamics for Power Take Off Device for Point Absorber Linear Wave Energy Converter." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-220344.

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Wave energy converters of point absorber type have been developed and constructed. Full scale experiments have been carried out at sea and electricity has been successfully delivered. Linear permanent magnet generators together with a subsea substation and buoys of various geometric shapes have been investigated theoretically and experimentally. The design has in large extent an electronic approach, keeping the mechanical part of it as simple as possible, due to the long life span and reliability of electric components. Because of the nature of a linear generator, the internal translator with permanent magnets has a limited stroke length which will be reached when the buoy is exposed to large wave heights. Internal springs at the top and bottom of the generator prevent the translator from hitting the generator hull. Inertial forces due to the mass and velocity of the translator and the buoy and its heave added mass compresses the spring. The added mass is a rather large part of the total moving mass. Simulations of a converter with a vertical cylindrical buoy and with a toroidal buoy were conducted, as well as real sea experiments with converters with cylindrical buoys of two different sizes and a toroidal buoy. The overloads are likely to affect the design and service life of the generator, the buoy and the wire which interconnects them. Buoy shapes with as much excitation force as possible and as little heave added mass as possible were sought. A toroidal buoy caused less overloads on the generator at sea states with short wave periods and relatively large wave height, but for sea states with very long wave periods or extremely high waves, the magnitude of the overloads was mainly determined by the maximum displacement of the buoy. Snap loads on the interconnecting wire, as the slack wire tensed up after a very deep wave trough, were found to be greater but of the same order of magnitude as forces during the rest of the wave cycle. During a 4 day period at various wave conditions, two converters with cylindrical buoys proved efficiency between 11.1 % and 24.4 %. The larger buoy had 78 % larger water plane area than the other buoy which resulted in 11 % more power production. Short wave period was beneficial for the power production. Infinite frequency heave added mass was measured for a cylindrical buoy at real sea and found to be greater than the linearly calculated theoretical added mass.

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Miller, Melissa Ann. "Characterization and epidemiologic investigation of apicomplexan parasites associated with meningoencephalitis in southern sea otters (Enhydra lutris nereis) and Pacific harbor seals (Phoca vitulina richardsi) /." Available via Proquest Digital Dissertations. Restricted to UC campuses, 2002. http://bibpurl.oclc.org/web/21243.

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Healy, Strömgren William. "Automatic Adjustment of the Floatation Level for a Tight-moored Buoy." Thesis, Uppsala University, Department of Earth Sciences, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-88883.

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Denna rapport ger förslag på olika metoder att automatiskt justera flytläget på en statiskt förankrad boj, en överblick över de processer som styr ändringen av vattennivån och en statisktisk analys på vattennivåförändringarna vid Stockholm, Kungsholmsfort och Kungsvik.

Beroende på vattenivåns variation finns olika metoder för justering. Områden med små variationer av vattennivå lämpar det sig bäst utan någon som helst justering av flytläget. Områden med inte för stora tidvattensförändringar bör justeras med ett system bestående av vinsch, växellåda med en utväxling på 10 000:1, en 12 V DC motor, ett skötselfritt 12 V batteri, en luftlindad linjärgenerator och en trådtöjningsgivare. Områden med stora variationer i tidvatten behöver en avlastning för motorn i form av en fjäder och dämpare. De monteras horizontellt inuti bojen för att skyddas från den yttre miljön.

Den statistiska analysen påvisade de största vattennivåändringarna vid både Kungsviks och Kungsholmsforts mätstationer, båda uppvisade ett intervall på 1,6 m mellan minimum och maximum. Kungsvik var den station med de största dagliga variationerna, detta på grund av tidvattnets påverkan i området.

This thesis gives examples of different methods of automated adjustment of floatation level for a static moored buoy, an overview of the theories behind water level change and a statistical analysis of the water level changes for Stockholm, Kungsholmsfort and Kungsvik.

Depending on the range and frequency of the water level change different methods of adjustment are recommended. For areas with small changes in sea level the best choice would be no adjustment of the floatation level. Areas that are influenced by moderate tidal ranges should incorporate a system of regulation consisting of a winch, gearbox with a gear ratio of around 10,000:1, 12 V DC motor, 12 V maintenance free battery, air coiled linear generator and a strain gauge. For areas with large tidal ranges the previous system should be complimented with a horizontally mounted spring, inside the buoy, to lessen the loads on the motor.

The statistical analysis found the largest extremes in water level of the three sites to be at Kungsvik and Kungsholmsfort, both exhibiting a range of almost 1.6 m. Kungsvik was the station with the largest daily variations, this is because this is the only station influenced by tidal variations.

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Kreuder, Johnson Christine. "Evaluation of survey methods used to assess distribution and abundance and characterization of patterns of mortality in southern sea otters /." Restricted to UC campuses, 2003. http://bibpurl.oclc.org/web/22018.

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Perlini, Lorenzo. "Seo: ottimizzazione dei siti web." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/4530/.

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Obiettivo di questa tesi è sviscerare i concetti fondamentali legati al SEO, in particolar modo dal punto di vista delle aziende italiane: l’evoluzione di questo business nel nostro territorio, gli strumenti e le tecniche di ottimizzazione impiegati nella realizzazione dei siti internet, i capitali, umani ed economici, che alimentano questo mercato in Italia e all’estero e i fattori che oggigiorno sono considerati di fondamentale importanza per ottenere visibilità nei motori di ricerca.

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Diblík, Jan. "SEO optimalizace webových stránek." Master's thesis, Vysoká škola ekonomická v Praze, 2009. http://www.nusl.cz/ntk/nusl-76673.

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The topic of this thesis is search engine optimization (SEO). This term covers many activities, procedures and techniques. When using SEO you can improve your position in a search engine and narrow it to so called key words. The first part of the theoretical part acquaints readers with the basic facts, statistics and defines the basic terminology. The main objective of the second part is concentrated on the main elements which affect the successes of optimalization. The practical part is dealing with analysis of the optimalized e-shop including its competitors. The changes and recommendations of improvement and development of the e-shop were suggested on the basis of the analysis, the theoretical acquirements and the experience of the author. These changes are gradually implemented in the following part of the thesis. The impact on the attendance and placement in the search engines is reviewed after the realization of the suggested above.

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Bascucci, Andrea. "Web Marketing e promozione del territorio - Il caso Motor Valley." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amslaurea.unibo.it/1193/.

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L’oggetto della presente tesi progettuale riguarda l’analisi di funzionalità e usabilità per il sito www.motorvalley.it e il conseguente supporto dello sviluppo di una nuova release. Si tratta di un lavoro atto sia ad aumentare i visitatori e il volume di traffico verso il sito, sia a vendere più pacchetti turistici e promuovere eventi legati al circuito Motor Valley.

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Wohlfarth, Inger-Marie. "Invasive species in Weddell Sea : Effects on food web structure." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-170744.

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The cold water of Antarctica has a unique endemic fauna, where durophagous predators are rare or absent. Due to climate change the water is heating up and the predators have begun to return to the Southern Ocean, which could bring a lot of changes to the food web. There is a high risk it will lead to losses in the unique marine fauna of Antarctica. The aim of this study is therefore to examine the potential effect these invasive species has on the food web structure in the Weddell Sea. To study this, several general network metrics were used (connectance, number of interactions, vulnerability and generality, trait distributions), as well as a number of centrality metrics (betweenness, closeness, PageRank). The analyses showed that none of the invasive species become important in the Weddell Sea food web. Nor do they significantly change the food web structure in any way which impact the importance of the native species. Their great opportunism regarding their prey species, and thereby their connectedness and thus their position in the network, are probably the main reason why theses invasive species did not become important in this food web. The lack of changes in the food web structure due to the presence of these invasive species are probably also a result of not including factors such as abundances and network dynamics in the analyses, which seem to be the driving forces when it comes to changes in food web structure caused by invasion of species.

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Sylvander, Peter. "Thiamine dynamics in the pelagic food web of the Baltic Sea." Doctoral thesis, Stockholms universitet, Institutionen för ekologi, miljö och botanik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-89192.

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Thiamine (vitamin B1) is involved in several basal metabolic processes. It is an essential compound for many organisms and in aquatic systems it is mainly produced by phytoplankton and prokaryotes and transferred to higher trophic levels through grazing and predation. The occurrence of thiamine deficiency in top predators has been reported from several aquatic systems. In the Baltic populations of the Atlantic salmon (Salmo salar) this has been observed since 1974 and recently thiamine deficiency has also been reported for Baltic sea birds. This thesis aims at investigating what processes that governs the flow of thiamine from the primary producers to top predators via zooplankton grazers and planktivoric fish. Paper I showed that abiotic stress factors such as salinity, temperature and light conditions can alter the thiamine content of phytoplankton. Paper II showed that abiotic factors indirectly can affect the stress resistance of zooplankton grazers by changing the nutritional quality of their food. In Paper III we found that the in situ thiamine content of zooplankton grazers was directly affected by that of the phytoplankton diet. In Paper IV we found a similar connection between the thiamine contents of Baltic salmon and herring, one of the major salmon prey species. In Paper V we looked at the thiamine content of the pelagic food web of the Baltic Sea as a whole and found a pattern of trophic dilution; the higher the trophic level of an organism (i.e. the further away from the source of thiamine in the food web), the lower was its thiamine content. In all, the results of this thesis suggests a bottom up effect on the thiamine status of the higher trophic levels of the Baltic Sea and that external factors, both natural and man-made, have the capability to affect the thiamine status of the plankton communities and thereby the whole Baltic ecosystem. Thiamine and other micronutrients are not something generally considered in the environmental management of aquatic systems but the results of this thesis suggest that ecological disturbances indirectly can have negative effects on top predators via a disrupted supply of essential substances.

At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 2: Manuscript. Paper 3: Manuscript. Paper 4: Manuscript. Paper 5: Manuscript.

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Khan, Muhammad Ahsan. "CFD Applications for Wave Energy Conversion Devices (MoonWEC) and Turbulent Fountains for Environmental Fluid Mechanics." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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This thesis is based on two studies that are related to floating wave energy conversion (WEC) devices and turbulent fountains. The ability of the open-source CFD software OpenFOAM® has been studied to simulate these phenomena. The CFD model has been compared with the physical experimental results. The first study presents a model of a WEC device, called MoonWEC, which is patented by the University of Bologna. The CFD model of the MoonWEC under the action of waves has been simulated using OpenFOAM and the results are promising. The reliability of the CFD model is confirmed by the laboratory experiments, conducted at the University of Bologna, for which a small-scale prototype of the MoonWEC was made from wood and brass. The second part of the thesis is related to the turbulent fountains which are formed when a heavier source fluid is injected upward into a lighter ambient fluid, or else a lighter source fluid is injected downward into a heavier ambient fluid. For this study, the first case is considered for laboratory experiments and the corresponding CFD model. The vertical releases of the source fluids into a quiescent, uniform ambient fluid, from a circular source, were studied with different densities in the laboratory experiments, conducted at the University of Parma. The CFD model has been set up for these experiments. Favourable results have been observed from the OpenFOAM simulations for the turbulent fountains as well, indicating that it can be a reliable tool for the simulation of such phenomena.

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Lindqvist, Dennis. "Hydroxylated polybrominated diphenyl ethers in Baltic Sea biota : Natural production, food web distribution and biotransformation." Doctoral thesis, Stockholms universitet, Institutionen för miljövetenskap och analytisk kemi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-135789.

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Hydroxylated polybrominated diphenyl ethers (OH-PBDEs) are naturally produced in aquatic ecosystems e.g. by algae. Many OH-PBDEs have been observed to be highly bioactive and to cause adverse effects through several pathways, e.g. via disrupting oxidative phosphorylation (OXPHOS). The levels of some OH-PBDEs have increased in Baltic biota over the past decades. This may be associated with the nutrient enrichment of the Baltic Sea, which has favored growth of some of the OH-PBDE producers. Ceramium tenuicorne has been suggested to be a producer of OH-PBDEs in the Baltic Sea, which is supported by the results presented in this thesis. The levels of OH-PBDEs were observed to fluctuate greatly in C. tenuicorne over the summer season, and to correlate with the levels of pigments in the algae. However, the observed congener pattern in C. tenuicorne questioned theories regarding the mechanism of their biosynthesis. The results indicate a much more selective pathway for biosynthesis than previously suggested for the production of OH-PBDEs. One of the most abundant OH-PBDEs in C. tenuicorne, 6-OH-BDE137, has previously been observed to be toxic to bacteria, fungi, and crustaceans. Furthermore, Baltic gammarids seemed to change their feeding preferences towards less grazing on C. tenuicorne during the production peek of OH-PBDEs in the alga. This suggests that OH-PBDEs may serve as allelochemical defense agents for C. tenuicorne. The transport and fate of OH-PBDEs through a Baltic food chain was also studied, including C. tenuicorne, Gammarus spp., three-spined stickleback (Gasterosteus aculeatus), and perch (Perca fluviatilis). A small portion of the OH-PBDEs were observed to be methylated in the alga, or by associated bacteria. The methylated OH-PBDEs biomagnified in the food chain up to perch, in which they were converted back to the OH-PBDEs via demethylation. The OH-PBDEs and their methylated counterparts were also partially debrominated in the food chain, which resulted in high concentration of 6-OH-BDE47 in the perch. This congener is the most toxic OH-PBDE with regards to OXPHOS disruption. Another biotransformation of OH-PBDEs was identified in Baltic Sea blue mussels (Mytilus edulis). High concentrations of OH-PBDEs were conjugated with lipophilic moieties, e.g. fatty acids. This increases the residence time of the OH-PBDEs in the mussels. Mussels have been suggested to conjugate steroids with fatty acids as a means to regulate hormone levels. The conjugation of OH-PBDEs to fatty acids may occur due to intrusion into this pathway. Methods were developed to include quantification of conjugated OH-PBDEs in the analysis of mussels. OH-PBDEs were also quantified in blood from Baltic Sea grey seals (Halichoerus grypus). Seals originating from the Baltic proper were observed to be more highly exposed to 6-OH-BDE47 than seals from the Gulf of Bothnia. However, the levels of OH-PBDEs were generally low. A major effort was invested into securing these results, including development of a new analytical method. Blood obtained from dead seals is a difficult matrix for quantification of OH-PBDEs, and previous attempts using an established method yielded unsatisfactory results.

At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 4: Manuscript.

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Lauria, Valentina. "Impacts of climate change and fisheries on the Celtic Sea ecosystem." Thesis, University of Plymouth, 2012. http://hdl.handle.net/10026.1/1166.

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Climate change and fisheries have affected marine environments worldwide leading to impacts on ecosystem structure and functioning. However there is clear evidence of spatial variability in the response of these impacts both within and among marine ecosystems. Although several studies have tried to explain the effect of these impacts on marine food webs, it is unclear how they interact, and how they may affect marine ecosystems remains an important unanswered question. This suggests the urgent need for multiple-trophic level and ecosystem-based management approaches to account for both fisheries and climate change impacts at ocean basins across the globe. Marine apex predators, such as seabirds, are vulnerable to the effects of both climate and fishing impacts, and can be used as reliable and sensitive bio-indicators of the status of the marine ecosystem. The Celtic Sea ecosystem is a productive shelf region in the Northeast Atlantic. It is characterized by high fish and invertebrate biodiversity. In addition, internationally important numbers of seabirds, such as Northern gannet Morus bassanus (L.), Manx shearwater Puffinus puffinus (B.), Common guillemot Uria aalge (P.) and Black-legged kittiwake Rissa tridactyla (L.), breed along the Celtic Sea coasts. In recent years, fisheries from across Europe have intensively exploited the Celtic Sea, leading to changes in stock structure. Moreover, the increase in annual average Sea Surface Temperature by 0.67 oC over the past two decades has altered the composition of plankton communities. These impacts, independently and in tandem, are likely to have had dramatic effects upon the Celtic Sea food web emphasizing the need to enhance our understanding of this important marine ecosystem. In this thesis the effects of climate change and fisheries on the Celtic Sea pelagic food web are evaluated, in particular focussing on the response of seabird populations. This is in part because of recent declines in the breeding success of many seabird colonies in the northeast Atlantic, particularly around the North Sea. Long-term data across four trophic levels (phytoplankton, zooplankton, mid-trophic level fish and seabirds) and different modelling approaches are used to determine factors influencing seabird productivity at different geographical scales. First, I review the direct and indirect effects of climate change and fisheries upon marine ecosystems, as well as their impacts upon marine birds. Second, I use data collected during 1986-2007 from a single seabird colony, across four trophic levels, to investigate long-term direct and indirect climate effects. The results suggest only a weak climate signal in the Celtic Sea, and this is only evident between mid-trophic level fish and certain species of seabird. Third, a similar multi-trophic level approach across three nearby regions in the southwest UK (Irish Sea, Celtic Sea, and English Channel) reveal no evidence of a bottom-up signal during the period 1991-2007. These findings are in contrast with the nearby North Sea region, where a strong bottom-up effect was found to affect seabird populations, highlighting the importance of regional-based studies across multiple trophic levels. Finally, to provide a more complete picture of the Celtic Sea, and how it might respond to changes in fisheries management and climatic variation, I use the complex tropho-dynamic ecosystem model Ecopath with Ecosim. The main focus is on how seabird biomass changes in response to the application of different fisheries regimes likely to be implemented under forthcoming reforms to the Common Fisheries Policy (e.g. the application of quotas and discard bans), as well as future climate change scenarios, in order to provide guideline support for resource management and seabird conservation in the Celtic Sea. The results suggest that some seabird guilds (gulls and some other scavengers) may be negatively affected by a reduction in discards, while other species (offshore divers) will benefit from a decrease in the fishing of pelagic fish species. Climate change is likely to have a negative impact across all trophic levels with a strong negative impact upon seabird populations. Therefore seabirds are likely to show species-specific responses to both climate variation (bottom-up effect) and changes in fishing practices, in particular our findings suggest that for some species climate may outweigh the fisheries impacts even when fisheries pressure is reduced by 50%. In summary, this study suggests that despite the generally negative impact of climate described for some regions in the Northeast Atlantic, the Celtic Sea ecosystem seems to be more resilient. However, both climate and fisheries and the interactions between these factors should be taken into account in the formulation of future management plans for the Celtic Sea ecosystem. The use of multiple-trophic level and ecosystem-based approaches over multiple spatial and temporal scales has helped to elucidate possible trophic mechanisms that are the response to future fishing and climate impacts in the Celtic Sea. The results of this study could have implications for both management plans and conservation policy.

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Berglund, Johnny. "Pelagic microorganisms in the northern Baltic Sea : Ecology, diversity and food web dynamics." Doctoral thesis, Umeå : Univ, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-618.

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Rendell, Andrew Roy. "The wet deposition of trace metals and nutrients to the southern North Sea." Thesis, University of East Anglia, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317580.

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Malarney, Michele J. "Learning communities and on-line technologies : the classroom@sea experience /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/7907.

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Bergström, Sanna. "SEO for web developers : Understanding, implementing & testing." Thesis, Mittuniversitetet, Institutionen för informationssystem och –teknologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-40109.

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The objective of this study is to start understanding SEO when you are a web developer to help increase your knowledge to be able to offer more for your costumers. It aims to look at the bigger picture and try to touch a lot of areas within SEO without going in deep into every part. This study has taken help from several blogs and sources about SEO, mainly from the internet, to build a base of knowledge to put in to the implementation. And to test the results several SEO tools have been used, such as Google Analytics, Siteliner and Googles structured data testing. All tools for measuring different parts of SEO. Also a user experience test has been conducted to understand how visitors navigate to find information on the site and what roll content value has in SEO. To understand how to implement SEO in both code and content this study has 2 projects in its aim, one being translating posts and making sure the SEO is up to part for a medical blog and the other developing a website for a drop-in solarium business and implementing SEO into it. This study goes from braking down parts of SEO, explaining them whiteout going too deep, implementing them in both content and code and to finish testing and analyzing it.

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Holgerson, Jason L. "Collaborative online communities for increased MILSATCOM performance." Thesis, Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Sep/09Sep%5FHolgerson.pdf.

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Thesis (M.S. in System Engineering Management)--Naval Postgraduate School, September 2009.
Thesis Advisor(s): Osmundson, John. "September 2009." Description based on title screen as viewed on November 9, 2009. Author(s) subject terms: Operational Availability, Net-centric Warfare, Communities, Online, Web 2.0, Sustainment, Military SATCOM, NMT. Includes bibliographical references (p. 79). Also available in print.

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Mika, Jaroslav. "Optimalizace a propagace webu." Master's thesis, Vysoká škola ekonomická v Praze, 2008. http://www.nusl.cz/ntk/nusl-12370.

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In my thesis, I focused on optimalization web sites for full-text search engines and other forms of promotion in the context of the Internet. The goal of my work is to apply various means of optimizing and promotion website to its life cycle and the ongoing processes in this life cycle. To achieve the goals I set out as follows thesis divided into three relatively independent parts. The first part is devoted to describing the life cycle of web and selected processes taking place in this life cycle. The second part is devoted to descriptions of individual resources optimization and promotion web. In the final section, I described the means to apply optimization and promotion web site life cycle and processes associated with it, which I have described and illustrated in the first part of the work.

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Niiranen, Susa. "Multiple forces drive the Baltic Sea food web dynamics and its response to environmental change." Doctoral thesis, Stockholms universitet, Institutionen för ekologi, miljö och botanik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-92541.

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Understanding the interaction of multiple drivers and their compounded effects on ecosystem dynamics is a key challenge for marine resource management. The Baltic Sea is one of the world’s seas most strongly impacted by effects from both human activities and climate. In the late 1980’s changes in climate in combination with intensive fishing initiated a reorganization of the Central Baltic Sea (CBS) food web resulting in the current sprat-dominated state. In the future, climate change is projected to cause drastic changes in hydrodynamic conditions of the world oceans in general, and the Baltic Sea in particular. In this thesis, CBS food web responses to the combined effects of fishing, nutrient loads and climate were tested for the past (1974-2006) and projected into the future (2010-2098). A new food web model for the CBS (BaltProWeb) was developed using extensive monitoring data across trophic levels. This model described the past food web dynamics well, and was hence also used for future (2010-2098) projections. Different ensemble modeling approaches were employed when testing the food web response to future scenarios. The results show that regardless the climate change, the management of nutrient loads and cod fishing are likely to determine the food web dynamics and trophic control mechanisms in the future Baltic Sea. Consequently, the variation in the food web projections was large, ranging from a strongly eutrophied and sprat-dominated to a cod-dominated CBS with eutrophication levels close to today’s values. The results also suggest a potential risk of abrupt ecosystem changes in the future CBS, particularly if the nutrient loads are not reduced. Finally, the studies illustrate the usefulness of the ensemble modeling approach, both from the perspective of ecosystem-based management as well as for studying the importance of different mechanisms in the ecosystem response.

At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 4: In press. Paper 5: Submitted.

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Protopapa, Maria [Verfasser], and Christian [Akademischer Betreuer] Möllmann. "Plankton food web structures and interactions in the Eastern Mediterranean Sea / Maria Protopapa ; Betreuer: Christian Möllmann." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2019. http://d-nb.info/1195709641/34.

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Protopapa, Maria Verfasser], and Christian [Akademischer Betreuer] [Möllmann. "Plankton food web structures and interactions in the Eastern Mediterranean Sea / Maria Protopapa ; Betreuer: Christian Möllmann." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2019. http://nbn-resolving.de/urn:nbn:de:gbv:18-99895.

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Jenkins, Maggie F. "Indirect Food Web Interactions: Sea Otter Predation Linked to Invasion Success in a Marine Fouling Community." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/2000.

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Humans have caused grave ecological and economic damage worldwide through the introduction of invasive species. Understanding the factors that influence community susceptibility to invasion are important for controlling further spread of invasive species. Predators have been found to provide biotic resistance to invasion in both terrestrial and marine systems. However, predators can also have the opposite effect, and facilitate invasion. Therefore, recovery or expansion of native predators could facilitate the spread of invasive species. Needles et al. (2015) demonstrated that the threatened southern sea otter (Enhydra lutris nereis) facilitated the invasion of an exotic bryozoan, Watersipora subatra. However, the underlying mechanism was not fully understood. We tested the hypothesis that sea otter predation on Romaleon antennarium crabs indirectly facilitated the abundance of W. subatra. To do this, we collected weekly data on sea otter foraging and quantified the abundance of crabs in the sea otter diet. We also conducted a caging experiment, where we experimentally manipulated crab densities and limited otter access using exclusion cages on pier pilings in Morro Bay, CA. We used photoQuad image processing software to calculate the abundance of W. subatra on PVC panels within each treatment group. We found that crabs were the second most abundant prey item in Morro Bay, comprising 25.1% of the otter diet. Through the caging experiment, we found that W. subatra abundance significantly increased as crab densities decreased. Our results indicated that sea otters indirectly facilitated the invasion of W. subatra by reducing R. antennarium crab densities and sizes. Removal of crabs may release W. subatra from the disturbance caused by crab foraging behavior. Understanding the impacts of top predators in invaded ecosystems has important management implications, as recovery of predator populations could unintentionally benefit some non-native species. Therefore, management should focus first on prevention and second on early detection and eradication of invasive species likely to benefit from predator recovery.

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Holliland, Per B. "Trophic interactions and behaviour : Studies relevant to a Baltic Sea biomanipulation." Doctoral thesis, Stockholms universitet, Systemekologiska institutionen, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-79075.

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The main theme of this thesis is the interactions of animals with the environment and each other. The thesis was written within the framework of a biomanipulation project “Pikeperch in Himmerfjärden”. With the aim to investigate possible trophic pit-falls, give the manipulation the best possible start, and find ways to monitor the progression of the manipulation. In Paper I the diet of the invader cladoceran Cercopagis pengoi is analysed with stable isotopes; conducted prior to stocking. C.pengoi has a preference for large copepods, indicating possible competition with fish. Paper II investigates the behavioural differences between pikeperch fingerlings reared in different environments (pond vs. tank). Results suggest that fish reared in semi-natural ponds are more likely to survive directly after stocking. In Paper III and IV, the diel vertical migrations (DVM) of copepods are in focus. In Paper III the migrations of two copepod species: Acartia spp. and Eurytemora affinis are studied over season and life stage. The amplitude of migration was found to increase with ontogeny for both species, indicating evasion of visual predators. Paper IV examines the varying migratory patterns of adult female E. affinis finding that these animals migrate more actively when feeding conditions deteriorate and growth decreases. The overall conclusions of the thesis are that behavioural, not only direct trophic interactions are key when studying ecosystems.

At the time of the doctoraldefense, the following papers were unpublished and had a status asfollows: Paper2: In press. Paper 4: Manuscript.

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Lloyd-James, Maureen. "Using Online Technologies to Deliver Management Courses to Cruise Ship Personnel at Sea." NSUWorks, 2008. http://nsuworks.nova.edu/gscis_etd/218.

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As the cruise industry continues to grow at a rapid pace, additional qualifications for its management personnel are becoming increasingly important. Many new ships are built each year, leaving a void in experienced personnel. Additionally, some leave the ships in order to improve professional qualifications on shore. Whereas many of the companies are training personnel onboard using on-the-job training, the concepts addressed in college-level management programs remain lacking. The goal was to implement and evaluate delivery of formal coursework to English-speaking, multicultural cruise ship personnel onboard by using emerging technologies that are available today. College-level management courses using Web 2.0 technologies were designed, delivered and evaluated. Two courses were offered each was split into two groups using different technologies. Group 1 used non-emerging technologies via a web page with additional material to support the textbook. This group also used discussion forums, online quizzes and tests and online grade book. Group 2 used the same features as the first and Web 2.0 technologies including Wikis, blogs, vodcasts, YouTube.com video clips, and synchronous Instant Messaging. Both groups had intense, positive distant interactions with faculty and had comparable outcomes. The least effective technology was the wiki and the most, the Discussion Forum. The finding was that the cruise industry may well have developed a distinct culture is an important one that may well lead to a better understanding of acculturation. Three weeks proved an ideal length of time for students to complete the 1.5-credit courses. Dividing 4.5-credit courses into 1.5-modules proved successful. Out of the original 249 applicants, 162 students participated from 36 different countries located on 64 different ships around the world.

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Garstecki, Tobias. "The microbial food web of the coastal southern Baltic Sea as influenced by wind-induced sediment resuspension." [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=962769282.

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Österblom, Henrik. "Complexity and Change in a Simple Food Web : Studies in the Baltic Sea (FAO Area 27.IIId)." Doctoral thesis, Stockholm University, Department of Systems Ecology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-953.

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An influence at one trophic level can result in dynamic impacts also on other components of a food web. These dynamics are known as trophic cascades, and can be both top-down and bottom-up. After a near-collapse of the Baltic cod Gadus morhua stock in the 1980s, its main prey sprat Sprattus sprattus increased dramatically. The main food of sprat, marine copepods, decreased during the same time period, likely a combined effect of increased predation pressure from sprat and decreasing salinities. This shortage of food for sprat resulted in decreasing quality of sprat as a food source for common guillemots Uria aalge. However, a recent increase in fishing for sprat has again resulted in better feeding conditions for guillemots.

Human impacts on this simple food web can be complex. In the early 20th century, marine mammals were abundant and nutrient levels were low in the Baltic Sea. This thesis illustrate that this situation corresponded to lower fish biomass. A reduction of seals early in the century led to reduced top-down control, which resulted in increasing fish stocks. Later, in the 1950s, the largest inflow of salt water during the century mobilized accumulated phosphorus from the deep sediments, which stimulated nitrogen fixation. Combined with increasing anthropogenic nutrient loads, this led to increased primary production and a rapid change from an oligotrophic to a eutrophicated state. This change can be termed a regime shift, which also stimulated fish production. Subsequent over-fishing of cod likely caused a second regime shift, from a cod- to a clupeid- dominated state, which led to the described effects on the common guillemots.

Several factors affect the life-history of this long-lived seabird. Bycatches in gillnet fisheries is one factor directly affecting guillemot survival, and the proportion of bycatches increased during a period of increasing fishing effort. Surprisingly, avian cholera, a previously undocumented disease in common guillemots, was found at times to cause considerable adult mortality. Common guillemot life-history information can communicate the diversity of factors influencing marine ecosystems – hopefully this can increase our understanding of how complex even "simple" food webs are.

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Österblom, Henrik. "Complexity and change in a simple food web : studies in the Baltic Sea (FAO Area 27.IIId) /." Stockholm : Department of Systems Ecology, Stockholm university, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-953.

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Bosco, de Miranda Vasconcelos Fernanda Helena. "Climate change and the influence of river inflow on pelagic food web efficiency in the Baltic Sea." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-111549.

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Climate change predictions indicate that increased future rainfall in the north of Europe will result in elevated land run off, thus allochthonous material transported to the Baltic Sea will increase. Consequently, compounds including humic substances, organic matter and inorganic nutrients (N and P), all with different biological availabilities, will be transferred to the sea. Such compounds will be incorporated differently into the food web, influencing primary (PP) and bacterial (BP) production, phytoplankton and zooplankton composition as well as food web efficiency (FWE), which are our 3 tested hypotheses. Riverine inflow was simulated by the addition of natural soil extracts (one from a southerly (Daugava) and one from a northerly (Öre) site on a daily basis to 2000 L indoor mesocosms (at Umeå Marine Sciences Centre). These mesocosms contained a natural food web collected from the Baltic Sea, including bacteria, phytoplankton and zooplankton; plus the addition of 7 juvenile fish (Perca fluviatilis). 12 mesocosms were divided into 4 different treatments where the difference between treatment and respective control was made by the addition of soil extract. Results showed that the input of soil matter from both sites created a lower PP:BP ratio, increased net heterotrophy in the systems, and in general resulted in changes to the phytoplankton and zooplankton community composition. Fish production and FWE was however only reduced in the Daugava treatment. Understanding changes in FWE and the structure of the food web will be vital for management of this system under future climatic conditions.

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Chen, Bingzhang. "Trophic interactions within the microbial food web in Hong Kong coastal waters and the South China Sea /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?AMCE%202008%20CHEN.

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Boutet, Charles-Victor. "Le cycle de l’information en intelligence économique, à la lumière du web 2.0." Thesis, Toulon, 2011. http://www.theses.fr/2011TOUL0010/document.

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Le cycle de l‟information, de la collecte à la dissémination, est central en intelligence économique. D‟autre part, depuis quelques années, le web 2.0, le web inscriptible a modifié la face d‟internet. Nos travaux ont pour sujet l‟étude de l‟impact que ce fameux web 2.0 a sur le cycle en question et nous proposons des méthodes et outils afin de tirer parti de ce nouveau paradigme, et ce, pour chaque étape du cycle
The information cycle, from collection to dissemination is a cornerstone in competitive intelligence. On the other hand, in recent years, web 2.0, writable web, changed the face of the Internet. Our work is to study about the impact that web 2.0 has on the famous cycle and propose methods and tools to take advantage of this new paradigm, and this for each stage of the cycle

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Andr, Ondřej. "Srovnání on-page SEO faktorů pro mobilní web." Master's thesis, Vysoká škola ekonomická v Praze, 2015. http://www.nusl.cz/ntk/nusl-204028.

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The thesis deals with a topic of SEO onpage signals, which are important for search engines because of sorting pages in a search engine result page. It focuses on importance of these signals for mobile SERP. Main goals of this study are to describe current recommendations for SEO on-page factors for mobile web and experimentally test real importance of these signals. Based on the results I composed an optimal set of factors with the most benefit for SEO. Theoretical part of the study summarizes basic facts about mobile searching, describes specific mobile users behaviour and describes current recommendations for mobile web onpage optimizing from Google and Seznam.cz. In practical part there is a comparative study of chosen on-page signals. For its needs I had to create few one page static websites. Each one has been optimized for on factor. All websites focused on the same very specific topic to ensure the same initial conditions. By keywords rank tracking in a SERP I was able to determine which signal is more important than others for search engines. The study results contribute to actual evaluation of each on-page signals importance for mobile website. The study could be beneficial for smaller companys websites, which need to get more visible on the net. They are able to optimize their costs by choosing the right set of on-page factors.

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Lee, Paul D. "Pneumatological ecclesiology in the Roman Catholic-Pentecostal dialogue : a Catholic reading of the third quinquennium (1985-1989) /." Romae : Pontificia Studiorum Universitas a S. Thoma Aq. in Urbe, 1994. http://bibpurl.oclc.org/web/30431.

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Hogfors, Hedvig. "Summer cyanobacterial blooms in the Baltic Sea - implications for copepod recruitment." Doctoral thesis, Stockholms universitet, Systemekologiska institutionen, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-81680.

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During summer, the Baltic Sea is subjected to the world’s largest cyanobacterial blooms. These blooms are linked to eutrophication and raise many questions concerning their effects on the ecosystem. To understand their impacts on the food web dynamics, it is essential to assess growth responses of grazers to these cyanobacteria. In the northern Baltic proper, copepods are the most important herbivores providing an essential link between the primary producers and higher trophic levels. In this Thesis, Papers I & II evaluate methods to estimate copepod growth in response to feeding conditions in situ. The most conspicuous diazotrophic filamentous cyanobacterium in the Baltic Sea is Nodularia spumigena, a producer of nodularin which is highly toxic to vertebrates, yet its ecological role is largely unknown. In Paper III, reciprocal interactions between cyanobacteria, sympatric algae and copepods are studied. The results suggest that nodularin is likely involved in allelopathic interactions, but it is not an inducible defense against grazers. Furthermore, the results of Papers IV & V, indicate that natural assemblages of N. spumigena and Anabaena spp. may support copepod reproduction and that total diazotrophic filamentous cyanobacteria appear to provide a beneficial feeding environment for the feeding stages of copepod nauplii, most probably by stimulating the microbial communities that nauplii feed upon. Since cyanobacterial blooms are projected to increase due to global climate change, the combined effects of toxic cyanobacteria, ocean acidification and global warming predicted for year 2100 are further investigated on copepods in Paper IV. Taken together, these studies indicate that filamentous diazotrophic cyanobacteria contribute to sustaining secondary productivity and have potential implications of management practices with respect to combating eutrophication, global climate change and sustaining fish feeding conditions.

At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 4: Manuscript. Paper 5: Manuscript.

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Bryant, Cameron L. "Web crippling of hot-rolled beams at stiffened-seat connections." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-12052009-020154/.

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Fiorini, Melissa. "Uma arquitetura genérica de software para disponibilização de uma aplicação web para dispositivos móveis." Florianópolis, SC, 2006. http://repositorio.ufsc.br/xmlui/handle/123456789/88674.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Elétrica.
Made available in DSpace on 2012-10-22T12:18:01Z (GMT). No. of bitstreams: 1 226903.pdf: 1503579 bytes, checksum: 491afc079b8522f91ffc6ffe09e471e4 (MD5)

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Azie, Chiara. "Internazionalizzazione di un e-commerce tra localizzazione, SEO e SEA: il caso di maremossoforzasette.it." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24895/.

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This dissertation situates itself in the research area of website localization and aims to present the localization project carried out by the candidate. In particular, this work focuses on the localization from Italian into English of one section of the e-commerce maremossoforzasette.it, which belongs to the small enterprise Da Franco snc. Specifically, this study aims to both show how e-commerce can successfully reach foreign customers with the help of localization and Search Engine Marketing and to demonstrate the skills needed by translators to tackle this challenge. The first part of this thesis, including chapters I, II and III, represents the theoretical background on which the practical work carried out by the candidate is based. The second part of this dissertation, including chapters four and five, aims to show how the project developed in practice: from the analysis of source texts to the creation of linguistic resources to the commentary on the translation process. This dissertation clearly shows that e-commerce internationalization needs to be thoroughly planned if a company aims to reach foreign customers, and that simply translating the website content won't suffice. On the one hand, companies should implement a successful globalization strategy that takes both the advantages and the costs of localization into account. On the other, translators should acquire new skills that go beyond linguistic and cultural ones. In this thesis, it has been demonstrated that basic knowledge of Search Engine Optimization and Search Engine Advertising is of vital importance when dealing with localization and is also what could make a translator stand out from the competition. In addition, the understanding of the usability, readability and accessibility principles, the use of Content Management Systems, Google Analytics and Google Market Finder, represent useful knowledge for translators who operate in the field of website localization.

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Ayca, Aykut. "Development Of A Web Gis-based Tsunami Inundation Mapping Service." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614404/index.pdf.

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Tsunamis, as the catastrophic disasters, can cause loss of live and property when they come to the shores. Preparation of emergency plans is essential to reduce the damage. Consequently, any initiative in tsunami modeling and inundation mapping is of vital importance for progressing safety surveillance and maintenance. In an effort to achieve a thorough analysis of effect of tsunami, it is critical to estimate the geographical extent of possibly affected area and to predict tsunami impacts. The inundation mapping system also must serve to manage the simulation data in a scalable environment to reach end-users in the time of event. For this purpose, in this study, the generation of a Web based Geographic Information System (GIS) to serve inundation maps through web. The research methodology consists of four main stages: (i) simulating tsunamis based on six different scenarios (ii) processing simulation data through a GIS application
(iii) development of web interfaces and implementation of the developed model for Web-GIS application
(iv) verification of the created model for Marmara Sea Region. The proposed system is expected to be an efficient tool for improving inundation mapping efforts for expected tsunamis in Turkey.

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Königk, Torben. "Sea ice export through Fram Strait : variability and interactions with climate = Meereisexport durch die Framstraße /." Hamburg : Max-Planck-Institut für Meteorologie, 2005. http://mpimet.mpg.de/de/web/download.php?src=max_erdsystem&file=pdfupload&id=19&filename=WEB_BzE_12.pdf.

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Esteller, Cucala Maria. "Automated web content personalization in the automotive sector: The SEAT case." Doctoral thesis, Universitat Politècnica de Catalunya, 2021. http://hdl.handle.net/10803/673138.

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Context: Over the last decades, the interest in personalization and, namely, web personalization has grown exponentially, both in industry and in academia. But still, while web personalization is already a standard practice in big digital corporations, its implementation in other companies is proving to be more challenging than anticipated. Despite many years of transformations, investments and massive efforts, a growing number of companies feel unsatisfied with their ability to implement web personalization and see positive effects on their business. Because of this, some authors predict that in the coming years, many of these companies will abandon their efforts to implement personalization in their websites. Consequently, this research is framed in the context of a company of the automotive sector that is currently interested in implementing website personalization in their website. Objectives: The research presented in this thesis aims to study how to implement web personalization using an automotive sector company as a reference, as this type of company exemplifies a business with long industrial tradition before the era of digitalization. With this objective we aim to understand which are the main difficulties that are holding back the expansion of web personalization in these sectors, as well as to propose some considerations to take into account during its implementation. In order to obtain a global vision, this research thesis is divided into four main sections, each of them representing a fundamental component in the implementation of web personalization in the organizations. Method: This research includes different methodologies such as an extensive literature review, an applied analysis, an assessment of the current situation based on surveys and interviews and a case study Conclusions/Implications: This research sheds light on the current situation of website personalization as its automatic implementation in companies other than digital organization. The main conclusion of this thesis is that the most important impediment for those companies to implement effective website personalization is the lack of understanding of the fundamental bases of personalization.
Durante las últimas décadas, el interés en la personalización y en concreto en la personalización web ha incrementado de forma exponencial, tanto en la industria como en la academia. Sin embargo, mientras la personalización web es ya una práctica base en algunas de las grandes empresas digitales, la extensión hacia otros tipos de empresa está demostrando ser más complejo de lo anticipado. Tras algunos años de transformaciones, inversiones y esfuerzos, cada vez son más las empresas que no se muestran satisfechas con su capacidad para implementar personalización web y ver efectos positivos en sus negocios. Hasta tal punto, algunos autores predicen, para los próximos años, el abandono masivo de muchas de las iniciativas de estas empresas para personalizar sus páginas web. Por estas razones, en la investigación que aquí se presenta se estudia cómo implementar la personalización web tomando como referencia las empresas del sector automoción, como ejemplo de empresa de tradición industrial previa a la era de la digitalización. Con ello, se pretende comprender cuáles son las dificultades que están frenando la expansión de la personalización web a estos sectores, así como proponer algunas consideraciones a tener en cuenta durante el proceso de implantación. Con el fin de obtener una visión global, esta investigación se divide en cuatro grandes bloques que constituyen los cuatro pilares fundamentales de la implementación de iniciativas de personalización web en las empresas. En primer lugar, para poder empezar una iniciativa de este tipo es imprescindible comprender qué es la personalización. Por este motivo, esta investigación empieza con el estudio del significado de este concepto. Para ello, se desarrolla y presenta un marco conceptual para la definición de la personalización extensible a diferentes sectores industriales y campos de investigación. En segundo lugar, para personalizar, es necesario conocer qué quieren los clientes. Por ello, esta investigación continúa con un análisis sobre la posibilidad de adquirir conocimiento sobre las preferencias de los usuarios web a través de criterios de segmentación. Considerando, a su vez, si estos criterios pueden ser utilizados para personalizar las páginas web. Con ello, se desarrolla y propone un criterio de segmentación de usuarios basado en la literatura y se evalúa su potencial para ser utilizado en la personalización web. En tercer lugar, antes de poder hacer ningún cambio real en la web, es esencial ser capaz de evaluar qué efectos tienen estos cambios. Por ello, el siguiente objetivo de esta investigación se centra en examinar diferentes métodos de evaluación web, así como los errores más comunes en su aplicación. Finalmente, este tipo de empresas están teniendo problemas para implementar iniciativas de personalización debido a que éstas requieren cambios significativos en la forma de trabajar de las organizaciones. Por consiguiente, el último estudio de esta investigación se centra en evaluar cómo una empresa de automoción es capaz de hacer frente a una transformación organizacional comparable a la necesaria para implementar personalización web. Con esto, los resultados de la tesis que a continuación se presenta, incluyen una visión general de la implementación de la personalización web en estos tipos de empresas sacando a relucir algunas de las dificultades que éstas afrontan
Administració i direcció d'empreses

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Valls, Mir Maria. "Trophic Ecology in Marine Ecosystems from the Balearic Sea (Western Mediterraniean)." Doctoral thesis, Universitat de les Illes Balears, 2017. http://hdl.handle.net/10803/461496.

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The conservation of marine ecosystem structure and functioning is a priority target within the context of the environmental management. This is especially important in oligotrophic systems such as the Balearic Sea, where food availability is a limiting factor. For such a target is fundamental to know the array of predator-prey interactions as a basis to understand the food web trophodynamics. In this Thesis, the trophic structure of the pelagic and benthic habitats off the Balearic Islands and the feeding ecology of three taxonomic groups (cephalopods, elasmobranchs and mesopelagic fishes) playing a key role in marine ecosystems, were investigated A relatively large food web (89 species) encompassing both the pelagic and the benthic habitats were analysed. The food webs extended up to 4 trophic levels in both habitats, and most species occupied intermediate trophic levels. A high partitioning rate of trophic resources was found, which might be related to the reduction of competition for food. The energy link between the pelagic and benthic communities (benthopelagic coupling; BPC) was stronger on the shelf break, where higher hydrodinamism mix the water column and associated nutrients, than on the slope. The geographical variability of oceanographic drivers (i.e. eddies, currents) influenced the strength of the BPC. Regarding species trophic interactions, stomach contents provided evidence of mesopelagic prey coupling pelagic and benthic habitats, especially down the shelf break. Rays from the shelf consumed mainly decapod crustaceans and teleosts, whereas sharks from the slope fed primarily upon mesopelagic prey (i.e myctophids, euphausiids). Sharks and rays variation in diet was driven by species specific ontogenetic stages and habitat use. The diet of the two squid Loligo vulgaris and L. forbesii, examined for the first time in the Mediterranean, showed their highly piscivorous habits. Their prey composition revealed a lack of diet overlap as a result of their bathymetric segregation. Both squids showed shifts in diet related to size and their reproduction period. The squid L. vulgaris feed on small benthic prey until they reach a size threshold and feed on benthopelagic fish thereafter. Seasonal changes in diet in both squid species, likely related to reproduction, might help improving their individual body condition. During this period, L. vulgaris increased the consumption of highly nutritive polychaetes, whereas the adults of L. forbesii carried out movements to deeper waters to feed on lipid-rich mesopelagic prey. Mesopelagic prey are important food resources for demersal species in the Balearic Sea and, as a result of their nycthemeral movements, they have important implications for the transport of mass and energy through the water column. The trophodynamics of this group revealed that food sources (δ13C) varied little over the spatial scales sampled (location and depth) but showed high seasonality, reflecting intra-annual changes in the species composition of the phytoplankton community. By contrast, spatio-temporal variations of mesopelagic trophic interactions (δ15N) were minimal. Important niche segregation was observed between the non-migratory stomiiforms and some of the extensive migratory myctophids. Finally, the comparative analysis of the trophic ecology of deep-sea cephalopods and elasmobranchs showed that they displayed different feeding strategies with a clear resource partitioning between and within taxa. Segregation of the isotopic space indicated a contrasting food source gradient (δ13C) stretching from pelagic (squids and cuttlefishes) to nektobenthic (octopuses and elasmobranchs) sources. However, deep-sea sharks off the Balearic Islands frequently preyed on mesopelagic species, as did squids and cuttlefishes. Cephalopods, in turn, constituted an important food resource for deep-sea sharks. Squid and shark species identified as benthopelagic feeders, play a key role in the transport of energy from midwater regions to the benthic community.

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Figueroa, Daniela. "Bacterioplankton in the Baltic Sea : influence of allochthonous organic matter and salinity." Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-117977.

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Climate change is expected to increase the precipitation ~30% in higher latitudes during the next century, increasing the land runoff via rivers to aquatic ecosystems. The Baltic Sea will receive higher river discharges, accompanied by larger input of allochthonous dissolved organic matter (DOM) from terrestrial ecosystems. The salinity will decrease due to freshwater dilution. The allochthonous DOM constitute a potential growth substrate for microscopic bacterioplankton and phytoplankton, which together make up the basal trophic level in the sea. The aim of my thesis is to elucidate the bacterial processing of allochthonous DOM and to evaluate possible consequences of increased runoff on the basal level of the food web in the Baltic Sea. I performed field studies, microcosm experiments and a theoretical modeling study. Results from the field studies showed that allochthonous DOM input via river load promotes the heterotrophic bacterial production and influences the bacterial community composition in the northern Baltic Sea. In a northerly estuary ~60% of bacterial production was estimated to be sustained by terrestrial sources, and allochthonous DOM was a strong structuring factor for the bacterial community composition. Network analysis showed that during spring the diversity and the interactions between the bacteria were relatively low, while later during summer other environmental factors regulate the community, allowing a higher diversity and more interactions between different bacterial groups. The influence of the river inflow on the bacterial community allowed “generalists” bacteria to be more abundant than “specialists” bacteria. Results from a transplantation experiment, where bacteria were transplanted from the northern Baltic Sea to the seawater from the southern Baltic Sea and vice versa, showed that salinity, as well as the DOM composition affect the bacterial community composition and their enzymatic activity. The results showed that α-proteobacteria in general were favoured by high salinity, β-proteobacteria by low salinity and terrestrial DOM compounds and γ-proteobacteria by the enclosure itself. However, effects on the community composition and enzymatic activity were not consistent when the bacterial community was retransplanted, indicating a functional redundancy of the bacterial communities. Results of ecosystem modeling showed that climate change is likely to have quite different effect on the north and the south of the Baltic Sea. In the south, higher temperature and internal nutrient load will increase the cyanobacterial blooms and expand the anoxic or suboxic areas. In the north, climate induced increase in riverine inputs of allochthonous DOM is likely to promote bacterioplankton production, while phytoplankton primary production will be hampered due to increased light attenuation in the water. This, in turn, can decrease the production at higher trophic levels, since bacteria-based food webs in general are less efficient than food webs based on phytoplankton. However, complex environmental influences on the bacterial community structure and the large redundancy of metabolic functions limit the possibility of predicting how the bacterial community composition will change under climate change disturbances.

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Degerman, Rickard. "Response of marine food webs to climate-induced changes in temperature and inflow of allochthonous organic matter." Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-102791.

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Global records of temperature show a warming trend both in the atmosphere and in the oceans. Current climate change scenarios indicate that global temperature will continue to increase in the future. The effects will however be very different in different geographic regions. In northern Europe precipitation is projected to increase along with temperature. Increased precipitation will lead to higher river discharge to the Baltic Sea, which will be accompanied by higher inflow of allochthonous organic matter (ADOM) from the terrestrial system. Both changes in temperature and ADOM may affect community composition, altering the ratio between heterotrophic and autotrophic organisms. Climate changes may thus have severe and complex effects in the Baltic Sea, which has low species diversity and is highly vulnerable to environmental change. The aim of my thesis was to acquire a conceptual understanding of aquatic food web responses to increased temperature and inputs of ADOM. These factors were chosen to reflect plausible climate change scenarios. I performed microcosm and mesocosm experiments as well as a theoretical modeling study. My studies had a holistic approach as they covered entire food webs, from bacteria and phytoplankton to planktivorous fish. The results indicate a strong positive effect of increased temperature and ADOM input on the bacterial community and the microbial food web. However, at the prevailing naturally low nutrient concentrations in the Baltic Sea, the effect of increased temperature may be hampered by nutrient deficiency. In general my results show that inputs of ADOM will cause an increase of the bacterial production. This in turn can negatively affect the production at higher trophic levels, due to establishment of an intermediate trophic level, consisting of protozoa. However, the described effects can be counteracted by a number of factors, as for example the relatively high temperature optimum of fish, which will lead to a more efficient exploitation of the system. Furthermore, the length of the food web was observed to be a strong regulating factor for food web responses and ecosystem functioning. Hence, the effect of environmental changes may differ quite drastically depending on the number of trophic levels and community composition of the system. The results of my thesis are of importance as they predict possible ecological consequences of climate change, and as they also demonstrate that variables cannot be examined separately.

This thesis was supported by grants from the Swedish Research Council FORMAS to AA and SL (217-2006-674), the Centre for Environmental Research in Umeå (CMF) to UB, AA and SL, and by the Swedish strategic research program ECOCHANGE to Umeå University.

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Ramos, Regiane Corrêa de Oliveira. "Amitav ghoshs Sea of poppies (2008): a web of gender, cultural and mythic relations in the nineteenth-century colonial India." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/8/8147/tde-09082016-093021/.

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This doctoral dissertation focuses on Amitav Ghoshs Sea of Poppies (2008) to investigate, from a postcolonial perspective, the way in which the writer deconstructs gender in the nineteenth-century India. In Chapter I, I analyze men and women within the Indian familial space in the nineteenth century, demonstrating how both are subjected to the disempowering effects of traditional rituals (such as sati), structures of Brahminical morality and patriarchal violence. The main character pair Deeti and Kalua is an example of how the persons are sexually assaulted (rape) and then silenced by an oppressive system. Chapter II, I examine men and women within the British colonial space, indicating how they are effected by the opium cultivation in the Indian hinterland. The peripheral characters peasants, eurasian and convicts are highlighted to show how they are uprooted from homeland and forced to be taken across the seas by the colonial administration to work as indentured labour. In Chapter III, I investigate the gender roles ascribed to Indians by the British colonizers. The secondary character pair Nob Kissin and Taramony shows how Ghosh deconstructs gender with the use of Indian mythology and storytelling. In the conclusion, I point out how Indian mythology is retrieved as an instrument of resistance.
Esta tese de doutorado tem como objetivo investigar, sob a luz do questionamento póscolonial, como Amitav Ghosh em Sea of Poppies (2008) desconstrói a narrativa colonial sobre gênero na Índia colonial no século XIX. No Capítulo I, analiso homens e mulheres dentro do espaço familiar indiano, demonstrando como ambos estão sujeitos aos efeitos de desempoderamento dos rituais (como sati), da moralidade bramânica e da violência patriarcal. As personagens Deeti e Kalua exemplificam como os sujeitos, vítimas de violência sexual (estupro), são silenciados pelo sistema opressor. No Capítulo II, examino homens e mulheres dentro do espaço colonial britânico, indicando como os indivíduos são afetados pelo cultivo do ópio na Índia. As personagens periféricas camponeses, anglo-indianos e condenados servem de exemplo para destacar como essas pessoas são arrancadas de seu país e forçadas a migrar para as colônias inglesas. No Capítulo III, investigo como os ingleses inferiorizam os indianos. As personagens secundárias Nob Kissin e Taramony mostram como o conceito de gênero é desconstruído através da mitologia. Concluo argumentando que Amitav Ghosh faz uso da mitologia indiana como um instrumento de resistência.

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Nikitkov, Alexei N. "Web assurance : a comparison of seal-based and reputation feedback-based assurance /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p3144446.

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Santos, Andreia Aparecida Pandolfi do. "Processo de sucessão familiar: um estudo de caso na multinacional WEG S.A." reponame:Repositório Institucional da UNISUL, 2016. http://www.riuni.unisul.br/handle/12345/3365.

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The importance of family-owned businesses in the world is undeniable in various spheres, such as: economic, political, social and cultural. Soon, a large number of organizations that profile, around the world, experiences or is going through the process of succession, whether professional or family member. The brazilian family companies occupy a large part of the economy, representing a total of approximately 90% among the companies in the country, according to data from the Brazilian Institute of Geography and Statistics (IBGE, 2014). This study aimed to analyze the strategies adopted for the implementation of the processes of inheritance of a family business. The company surveyed is considered to be of great size, the leader in its segment in Latin America and has various subsidiaries throughout the world. Based on the analysis of the processes of inheritance obtained in the organization studied, it was possible to identify the main strategies adopted for the legitimation, as well as its aspects facilitators, the obstacles and possible outbreaks of conflicts occurring in the processes. Before the strategies and the aspects identified, it was proposed a conceptual model of the succession process. Methodologically, it is a single case study with a qualitative approach, and focus. The data collection was carried out through semi-structured interviews and documentary research. The data were analyzed through the technique of content analysis, analysis of narratives with support of triangulation of data. As the results showed that the organization studied legalized with success two processes of succession and is in its third generation. In the first case, his succession was regarded as a member of the family, passed from father to son, already in the second case, there was a succession of Professionalised, past for training internal to the organization with over 35 years of professional experience developed within the company. It is concluded that the case studied presented important strategies and essential to the conduct of proceedings, among them: the succession planning in the long term, the program of incentives and leadership formation embedded in institutional culture, the formalization of corporate governance, the preparation and orientation for the heirs before actions stipulated by the family meetings with the purpose of guiding the heirs in the redirection of future generations for the position of shareholders, since the organization was founded to be a familial character, but fully professionalised. In conclusion, the present study presented contributions, theoretical and empirical, since the case studied differed from that traditionally has been studied with respect to the issue, because presented significant alternatives for planning the succession process, the mode of how future successors and the organization were prepared to overcome generations, having as a result driving successful in their succession. Finally, were expressed suggestions for future research.
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A relevância das empresas familiares no mundo é inegável em diversas esferas, como: a econômica, a política, a social e a cultural. Logo, um grande número de organizações desse perfil, no mundo todo, vivencia ou estará passando pelo processo de sucessão, seja profissional ou familiar. As empresas familiares brasileiras ocupam grande parte da economia, representando um total de aproximadamente 90% dentre as empresas do país, conforme dados do Instituto Brasileiro de Geografia e Estatísticas (IBGE, 2014). Este trabalho buscou analisar as estratégias adotadas para a realização dos processos sucessórios de uma empresa familiar. A empresa pesquisada é considerada de grande porte, líder em seu segmento na América Latina e possui diversas filiais espalhadas pelo mundo. Com base na análise dos processos sucessórios efetivados na organização estudada, foi possível identificar as principais estratégias adotadas para a legitimação, bem como os seus aspectos facilitadores, os dificultadores e os possíveis focos de conflitos ocorridos nos processos. Perante as estratégias e os aspectos identificados, foi proposto um modelo conceitual do processo sucessório. Metodologicamente, trata-se de um estudo de caso único, com abordagem qualitativa e enfoque descritivo. A coleta de dados foi realizada por meio de entrevistas semiestruturadas e pesquisa documental. Os dados foram analisados por meio da técnica de análise de conteúdo e de análise de narrativas com suporte da triangulação de dados. Como resultados evidenciou-se que a organização estudada legitimou com êxito dois processos de sucessão e se encontra na sua terceira geração. No primeiro processo, sua sucessão foi considerada familiar, passada de pai para filho, já no segundo processo, foi realizada uma sucessão profissionalizada, passado para profissional interno da organização com mais de 35 anos de experiências profissionais desenvolvidas dentro da companhia. Conclui-se que o caso estudado apresentou estratégias importantes e indispensáveis para a condução dos processos, entre elas: o planejamento sucessório a longo prazo, o programa de incentivo e de formação de lideranças incorporado à cultura institucional, a formalização da governança corporativa, a preparação e a orientação para os herdeiros perante ações estipuladas através dos encontros de famílias com o intuito de orientar os herdeiros no redirecionamento das futuras gerações para a posição de acionistas, uma vez que a organização foi fundamentada para ser uma empresa de caráter familiar, mas totalmente profissionalizada. Em suma, o presente estudo apresenta contribuições, teóricas e empíricas, visto que o caso estudado se diferencia do que tradicionalmente tem sido estudado com relação à temática. Neste estudo, foram apresentadas alternativas significativas para o planejamento do processo sucessório e observou-se como os futuros sucessores e a organização foram preparados para ultrapassarem gerações, resultando uma condução exitosa nas suas sucessões. Por fim, foram expressas sugestões para futuras pesquisas.

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Heller, Hansraj Christine. "Trophic cascading in Lake Lucerne, Switzerland : the influence of top-down controls on the pelagic food web /." [S.l.] : [s.n.], 2000. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13631.

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Úradníček, Lukáš. "Optimalizace webových stránek a strategie prodeje." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2011. http://www.nusl.cz/ntk/nusl-223256.

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The thesis deals with the optimization of website of thai massage studio. This work includes evaluation of the initial state, a proposed amendment, keyword analysis, optimization of texts and support through building backlinks. Evaluation of success is done through the analysis of traffic and tracking the position of the primary keywords on major search engines in the Czech Republic - Google.cz and Seznam.cz.

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Holmborn, Towe. "Zooplankton growth and trophic linkages : Implications for fish feeding conditions in the Baltic Sea." Doctoral thesis, Stockholms universitet, Systemekologiska institutionen, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-29485.

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The aim of this Thesis was to improve our understanding and assessment of feeding conditions for zooplanktivorous fish in the Baltic Sea. We investigated (papers I, II) the usefulness of biochemical proxies for assessments of growth and metabolic rates in the dominant Baltic copepod Acartia bifilosa. A predictive model (paper I) for egg production rate (EPR), based on body size, RNA content, and water temperature, was established using females of different geographical origin. This model demonstrates the usefulness of RNA content as a proxy for growth in zooplankton and, together with abundance data, it could be used to evaluate fish feeding conditions. Further (paper II), using A. bifilosa exposed to a food gradient, we evaluated responses of physiological rates and other biochemical proxies for growth and established correlations between physiological and biochemical variables. EPR and ingestion rate were most significantly correlated with RNA content. As assayed variables saturated at different food concentrations, food availability may affect assessments of physiological rates using proxies. In paper III, we explored the effect of high EPR and ingestion rate on astaxanthin content in A. bifilosa. We found that the astaxanthin content decreased at high feeding rates, most likely due to decreased assimilation efficiency. This may impact the quality of zooplankton as prey. The invasion of Cercopagis pengoi, a zooplanktivorous cladoceran, has altered the trophic linkages in the Baltic Sea food web. In paper IV, we evaluated the feeding of zooplanktivorous fish on C. pengoi and found that irrespective of size both herring and sprat feed on it, with large herring being more selective. In turn, C. pengoi feeds mainly on older copepods (paper V), which are acknowledged important in fish nutrition. These results indicate that C. pengoi may compete with fish due to the diet overlap.

At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 2: In progress. Paper 3: Submitted

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Маніленко, Ю. А. "Аналіз та розробка системи моніторинга WEB-середовища." Thesis, Київський національний університет технологій та дизайну, 2018. https://er.knutd.edu.ua/handle/123456789/11205.

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Dalal, Bashi Omar, and Muhammad Naeem. "RDFa as Semantic Markup and Web Visibility." Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20414.

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Web visibility is the appearance of web sites in search engines. Web visibility in search engine is an important factor to improve the e-commerce on the web. If the web site gets high ranking in search engines it will attract more web traffic. Semantic markup is a technique to structure a web site, so it can be understandable by humans and computers. This allows the crawler or spider to understand the content of the web site during the search engine process. Semantically structured web sites increase the web visibility in search engines. RDFa is a semantic markup and supported by the W3C. In this thesis we have focused on the RDFa as a semantic markup technique. This study shows two aspects of RDFa i.e. what are the benefits and barriers of using RDFa in structuring and enhancing the web visibility of web sites in search engines, and how web developers implement RDFa. This study is based on the data that has been collected through literature review and interviewing different web developers from different companies. First result of this study shows the benefits and barriers of using RDFa according to the web developers. Second result is a guideline for helping the companies that are planning to implement the RDFa in structuring their web sites. The guideline is based on the technical steps and the requirements for implementing RDFa that web developers have described during the interviews.

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Dissertations / Theses on the topic 'WEC Sea'

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