Relevant bibliographies by topics / Deep Dredge

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Deep Dredge'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Deep Dredge"

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Thorarinsdóttir, Gudrun G., Larry Jacobson, Stefan Áki Ragnarsson, Elena Guijarro Garcia, and Karl Gunnarsson. "Capture efficiency and size selectivity of hydraulic clam dredges used in fishing for ocean quahogs (Arctica islandica): simultaneous estimation in the SELECT model." ICES Journal of Marine Science 67, no. 2 (2009): 345–54. http://dx.doi.org/10.1093/icesjms/fsp236.

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AbstractThorarinsdóttir, G. G., Jacobson, L., Ragnarsson, S. Á., Garcia, E. G., and Gunnarsson, K. 2010. Capture efficiency and size selectivity of hydraulic clam dredges used in fishing for ocean quahogs (Arctica islandica): simultaneous estimation in the SELECT model. – ICES Journal of Marine Science, 67: 345–354. Estimates of capture efficiency and size selectivity for commercial dredges are important in estimating stock biomass and setting catch limits for the ocean quahog off Iceland and the United States. Ocean quahogs are long-lived, slow-growing, and sensitive to overharvest resulting
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Gaspar, M. B., C. A. Richardson, and C. C. Monteiro. "The effects of dredging on shell formation in the razor clamEnsis siliquafrom Barrinha, southern Portugal." Journal of the Marine Biological Association of the United Kingdom 74, no. 4 (1994): 927–38. http://dx.doi.org/10.1017/s0025315400090159.

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Shell growth of the razor clamEnsis siliqua(Mollusca: Bivalvia) from southern Portugal has been analysed using both surface growth rings and internal shell microgrowth patterns. The growth rate estimated from an analysis of the growth rings is slower (von Bertalanffy growth, constant K=0·27) than that determined from the annual narrowing of the internal microgrowth patterns present in shell sections (K=0·65), although both methods predict a similar asymptotic length, L∞, of 144·8 and 139·6 mm, respectively.The Barrinha razor clam population occurs in a heavily dredged area and an analysis of s
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Alonso, Marta, Patricia Carney, Victor Fernandez-Cuervo, Lin Li, and Eduardo Vega. "Port of Miami Micro-Tunneling in Preparation for Deep Dredge." Proceedings of the Water Environment Federation 2015, no. 1 (2015): 1–11. http://dx.doi.org/10.2175/193864715819523161.

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Tyler, Paul A. "Disposal in the deep sea: analogue of nature or faux ami?" Environmental Conservation 30, no. 1 (2003): 26–39. http://dx.doi.org/10.1017/s037689290300002x.

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The deep sea is the world's largest ecosystem by volume and is assumed to have a high assimilative capacity. Natural events, such as the sinking of surface plant and animal material to the seabed, sediment slides, benthic storms and hydrothermal vents can contribute vast amounts of material, both organic and inorganic, to the deep ocean. In the past the deep sea has been used as a repository for sewage, dredge spoil and radioactive waste. In addition, there has been interest in the disposal of large man-made objects and, more recently, the disposal of industrially-produced carbon dioxide. Some
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Stancliffe, Richard J., Christopher A. Tout, and Onno R. Pols. "Deep dredge-up in intermediate-mass thermally pulsing asymptotic giant branch stars." Monthly Notices of the Royal Astronomical Society 352, no. 3 (2004): 984–92. http://dx.doi.org/10.1111/j.1365-2966.2004.07987.x.

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Cohen, Y., N. Kress, and H. Hornung. "Organic and Trace Metal Pollution in the Sediments of the Kishon River (Israel) and Possible Influence on the Marine Environment." Water Science and Technology 27, no. 7-8 (1993): 439–47. http://dx.doi.org/10.2166/wst.1993.0580.

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The sediments of the lower reach of the Kishon river, its harbors and estuary, sampled in 1989-1991, were highly polluted by trace metals and petroleum derived compounds released by the adjacent industries. The contamination was highest in the sediment deposition area of the Kishon fishing harbor and decreased seaward. River-borne pollution was also evident in Haifa Bay opposite the Kishon estuary. Contaminants trapped in the sediments of the lower Kishon river system can reach the marine environment through bottom transport of sediment particles and also as a result of disposal at sea of dred
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Pastorelli, Giada, Paola Marigo, and Léo Girardi. "Calibrating TP-AGB stellar models and chemical yields through resolved stellar populations in the Small Magellanic Cloud." Proceedings of the International Astronomical Union 14, S343 (2018): 269–72. http://dx.doi.org/10.1017/s1743921318006142.

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AbstractMost of the physical processes driving the TP-AGB evolution are not yet fully understood and they need to be modelled with parameterised descriptions. We present the results of the on-going calibration of the TP-AGB phase based on a complete sample of AGB stars in the Small Magellanic Cloud (SAGE-SMC survey). We computed large grids of TP-AGB models with several combinations of third dredge-up and mass-loss prescriptions with the COLIBRI code. The SMC AGB population is modelled with the population synthesis code TRILEGAL according to the space-resolved star formation history derived wi
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Szostek, Claire L., Lee G. Murray, Ewen Bell, Gemma Rayner, and Michel J. Kaiser. "Natural vs. fishing disturbance: drivers of community composition on traditional king scallop, Pecten maximus, fishing grounds." ICES Journal of Marine Science 73, suppl_1 (2015): i70—i83. http://dx.doi.org/10.1093/icesjms/fsv152.

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Abstract Scallop dredging is considered to be one of the most damaging forms of fishing to benthic habitats, although these effects vary among different habitats. The present study characterizes the biological communities that occur within the spatial limits of the English Channel king scallop dredge fishery in relation to key environmental drivers [mean seabed temperature; seabed temperature range; interannual temperature variation; bed shear stress (BSS); substrate characteristics; and depth] and across a gradient of scallop dredging intensity derived from vessel monitoring system data. Dred
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Boothroyd, Arnold I., and I. ‐Juliana Sackmann. "The CNO Isotopes: Deep Circulation in Red Giants and First and Second Dredge‐up." Astrophysical Journal 510, no. 1 (1999): 232–50. http://dx.doi.org/10.1086/306546.

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Siess, Lionel, Stéphane Goriely, and Norbert Langer. "Evolution of Rotating AGB Stars and the s-Process Nucleosynthesis." Publications of the Astronomical Society of Australia 20, no. 4 (2003): 371–77. http://dx.doi.org/10.1071/as03029.

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AbstractWe present new results on the evolution and nucleosynthesis in rotating AGB stars. We analyse the role of the gradient of mean molecular weight in the mixing process and show that neglecting this component induces a potentially strong third dredge-up. We also quantify the impact of rotation on the structure and conclude that the effects of rotation (1) mainly concern the inner, fast rotating regions of the stars and (2) are relatively weak as long as rotational mixing does not induce a deep third dredge-up. We also focus our investigations on the s-process nucleosynthesis and show that
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Dissertations / Theses on the topic "Deep Dredge"

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Jarossy, Sara M. "An Evaluation of the Seagrass Habitat in North Biscayne Bay, Florida, in Relation to a Changing Environment and Urbanization in the Port of Miami Harbor Basin 2005-2011." NSUWorks, 2016. http://nsuworks.nova.edu/occ_stuetd/434.

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Seagrass habitats in South Florida are exceptionally valuable. They play an important ecological role in the coastal environment by stabilizing sediment, providing habitat for other species and supporting a whole food web. The availability of light and nutrients in aquatic ecosystems are the driving factors behind seagrass distribution. Water quality has been known to influence the abundance, distribution and composition of seagrass beds. South Florida has extensive diverse coastal communities. Throughout its human development dramatic changes have occurred in its natural ecosystems. In South
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Drewe, Philipp [Verfasser], and Daniel [Akademischer Betreuer] Huson. "Detection and characterisation of RNA processing variation from deep RNA sequencing data / Philipp Drewe ; Betreuer: Daniel Huson." Tübingen : Universitätsbibliothek Tübingen, 2016. http://d-nb.info/1168011264/34.

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Shepel, Taras. "Obosnovanie parametrov kovšej zemlečerpatel'nych snarjadov dlja glubokovodnoj dobyči organo-mineral'nych osadkov." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2015. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-163765.

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The thesis is devoted to determining the parameters of the bucket to increase productivity of dredgers while mining deep-water organic-mineral sediments. It was achieved by increasing the fill factor through determining the rational geometrical parameters of the bucket. Analytical dependencies of the rational height and length of the bucket on the cutting parameters and physical-and-mechanical properties of the excavated sediments were determined. Expressions for defining forces while digging plasticity water-saturated soils were developed. Experimental investigations of the process of digging
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Books on the topic "Deep Dredge"

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Whiteaves, Joseph Frederick. On recent deep sea dredging operations in the Gulf of St. Lawrence. s.n., 1987.

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Kachun, Mitch. Michelle Obama, the Media Circus, and America’s Racial Obsession. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252036606.003.0004.

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This chapter shifts the focus to Michelle Obama, a figure whose family's experiences of enslavement, emancipation, and northward migration make her nearly as important a cultural figure as her husband. It explains how media coverage of Michelle Obama during the campaign was shaped not only by Americans' expectations of prospective first ladies, but by a long history of powerful stereotypes of black women and their bodies. While praised and admired by many, Michelle Obama had become a target whose attackers utilized an ever-expanding twenty-four/seven cable news cycle and the unprecedented foru
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Poore, Gary CB, Shane T. Ahyong, and Joanne Taylor, eds. Biology of Squat Lobsters. CSIRO Publishing, 2011. http://dx.doi.org/10.1071/9780643104341.

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Squat lobsters of the superfamilies Chirostyloidea and Galatheoidea are highly visible crustaceans on seamounts, continental margins, shelf environments, hydrothermal vents and coral reefs. About 1000 species are known. They frequently feature in deep-sea images taken by submersibles and are caught in large numbers by benthic dredges. Some species are so locally abundant that they form ‘red tides’. Others support a variety of important fisheries. 
 The taxonomy of squat lobsters has been intensively studied over the past few decades, making them one of the best known deepwater crustacean
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Book chapters on the topic "Deep Dredge"

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Dredge, Dianne, and Eóin Meehan. "The Collaborative Economy, Tourism and Sustainable Development." In Collaboration for Sustainable Tourism Development. Goodfellow Publishers, 2018. http://dx.doi.org/10.23912/9781911635000-3928.

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This chapter explores the collaborative economy, tourism and sustainability. The emergence of the digital collaborative economy has had profound transformative effects on the structure, organisation and business logics underpinning contemporary tourism (Dredge & Gyimóthy, 2017). It is opening up new business opportunities and livelihoods traditionally inaccessible to many individuals, and is driving deep transformation within existing industry practices. It is, however, not as new as many advocates claim, and can be best understood as an old economic model that has been transformed by the digitalisation processes associated with Industry 4.0 (Gilchrist, 2016; Smit et al., 2016). The collaborative economy has been claimed to be more sustainable than traditional business practices by lowering consumption and using existing resources more effectively (Botsman & Rogers, 2010). However, there is little evidence to support these claims, and for a variety of reasons, it has been difficult to undertake research to verify such assertions (Dredge & Gyimóthy, 2015). What is clear however, is that the collaborative economy is responsible for wide-ranging social and economic impacts and has proven to be very difficult to regulate. Despite these potential concerns, all indications are that it will continue to expand unabated. The impact and effects of the growth of the collaborative economy on sustainability is, therefore, a major issue that warrants further investigation.
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Gray, John S., and Michael Elliott. "Introduction." In Ecology of Marine Sediments. Oxford University Press, 2009. http://dx.doi.org/10.1093/oso/9780198569015.003.0004.

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As the oceans cover 70% of the earth’s surface, marine sediments constitute the second largest habitat on earth, after the ocean water column, and yet we still know more about the dark side of the moon than about the biota of this vast habitat. The primary aim of this book is to give an overview of the biota of marine sediments from an ecological perspective—we will talk of the benthos, literally the plants and animals at the bottom of the sea, but we will also use the term to include those organisms living on the intertidal sediments, the sands and muds of the shore. Given that most of that area is below the zone where light penetrates, the photic zone, the area is dominated by the animals and so we will concentrate on this component. Many of the early studies of marine sediments were taxonomic, describing new species. One of the pioneers was Carl von Linnaeus (1707–1778), the great Swedish biologist who developed the Linnaean classification system for organisms that is still used today (but under threat from some molecular biologists who argue that the Linnaean system is outdated and propose a new system called Phylocode). Linnaeus described hundreds of marine species, many of which come from marine sediments. The British marine biologist Edward Forbes was a pioneer who invented the dredge to sample marine animals that lived below the tidemarks. Forbes showed that there were fewer species as the sampled depth increased and believed that the great pressures at depths meant that no animals would be found deeper than 600 m. This was disproved by Michael Sars who in 1869 used a dredge to sample the benthos at 600 m depth off the Lofoten islands in Norway. Sars found 335 species and in fact was the first to show that the deep sea (off the continental shelf) had high numbers of species. Following these pioneering studies, one of the earliest systematic studies of marine sediments was the HMS Challenger expedition of 1872–1876, the first global expedition. The reports of the expedition were extensive but were mostly descriptive, relating to taxonomy and general natural history.
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"Fish Habitat: Essential Fish Habitat and Rehabilitation." In Fish Habitat: Essential Fish Habitat and Rehabilitation, edited by Joseph DeAlteris, Laura Skrobe, and Christine Lipsky. American Fisheries Society, 1999. http://dx.doi.org/10.47886/9781888569124.ch16.

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<em>Abstract.</em> —Seabed disturbance by mobile bottom-fishing gear has emerged as a major concern related to the conservation of essential fish habitat. Unquestionably, dredges and trawls disturb the seabed. However, the seabed is also disturbed by natural physical and biological processes. The biological communities that utilize a particular habitat have adapted to that environment through natural selection, and, therefore, the impact of mobile fishing gear on the habitat structure and biological community must be scaled against the magnitude and frequency of seabed disturbance due to natural causes. Fishers operating in the mouth of Narragansett Bay, Rhode Island use trawls to harvest lobsters, squid, and finfish and dredges to harvest mussels. These mobile fishing gears impact rock, sand, and mud substrates. Side-scan sonar data from 1995 with 200% coverage were available from the National Oceanic and Atmospheric Administration for the mouth of Narragansett Bay. Analysis of these data indicates that evidence of bottom scarring by the fishing gear is restricted to deeper waters with a seabed composition of soft cohesive sediments, despite the observation that fishing activity is ubiquitous throughout the bay mouth. A quantitative model has been developed to compare the magnitude and frequency of natural seabed disturbance to mobile fishing gear disturbance. Wave and tidal currents at the seabed are coupled with sediment characteristics to estimate the degree of seabed disturbance. Field experiments designed to compare the longevity of bottom scars indicate that scars in shoal waters and sand sediments are short-lived, as compared to scars in deep water and mud sediments, which are long-lasting. Finally, the model results are compared to the recovery time of sediments disturbed by the interaction of the fishing gear with the seabed. The impact of mobile fishing gear on the seabed must be evaluated in light of the degree of seabed disturbance due to natural phenomena. The application of this model on a larger scale to continental shelf waters and seabed sediment environments will allow for the identification of problematic areas relative to the degradation of essential fish habitat by mobile fishing gear.
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"Fish Habitat: Essential Fish Habitat and Rehabilitation." In Fish Habitat: Essential Fish Habitat and Rehabilitation, edited by Joseph DeAlteris, Laura Skrobe, and Christine Lipsky. American Fisheries Society, 1999. http://dx.doi.org/10.47886/9781888569124.ch16.

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<em>Abstract.</em> —Seabed disturbance by mobile bottom-fishing gear has emerged as a major concern related to the conservation of essential fish habitat. Unquestionably, dredges and trawls disturb the seabed. However, the seabed is also disturbed by natural physical and biological processes. The biological communities that utilize a particular habitat have adapted to that environment through natural selection, and, therefore, the impact of mobile fishing gear on the habitat structure and biological community must be scaled against the magnitude and frequency of seabed disturbance due to natural causes. Fishers operating in the mouth of Narragansett Bay, Rhode Island use trawls to harvest lobsters, squid, and finfish and dredges to harvest mussels. These mobile fishing gears impact rock, sand, and mud substrates. Side-scan sonar data from 1995 with 200% coverage were available from the National Oceanic and Atmospheric Administration for the mouth of Narragansett Bay. Analysis of these data indicates that evidence of bottom scarring by the fishing gear is restricted to deeper waters with a seabed composition of soft cohesive sediments, despite the observation that fishing activity is ubiquitous throughout the bay mouth. A quantitative model has been developed to compare the magnitude and frequency of natural seabed disturbance to mobile fishing gear disturbance. Wave and tidal currents at the seabed are coupled with sediment characteristics to estimate the degree of seabed disturbance. Field experiments designed to compare the longevity of bottom scars indicate that scars in shoal waters and sand sediments are short-lived, as compared to scars in deep water and mud sediments, which are long-lasting. Finally, the model results are compared to the recovery time of sediments disturbed by the interaction of the fishing gear with the seabed. The impact of mobile fishing gear on the seabed must be evaluated in light of the degree of seabed disturbance due to natural phenomena. The application of this model on a larger scale to continental shelf waters and seabed sediment environments will allow for the identification of problematic areas relative to the degradation of essential fish habitat by mobile fishing gear.
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Conference papers on the topic "Deep Dredge"

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van Duursen, Ewout, and Mark Winkelman. "New Approach of Deep Sea Dredging." In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-49351.

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A new approach of trailing suction dredging is presented. This approach is especially useful for dredging at depths over 100m. Normally a Jumbo Trailing Suction Hopper Dredger is used for dredging at depths of over 100m. This requires a large investment. The expensive dredging equipment is only used while dredging. This equipment is mainly “dead cargo” when sailing to the place of delivering the sand. Our new approach requires a significant lower investment. As the dredging equipment is used continuously, idle time is decreased and time for return of investment is shortened. The dredging depth
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Lotman, Rick, and Mario Alvarez Grima. "Deep Sea Mining With an Archimedes Screw Driven Vehicle." In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-49806.

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Archimedes screw propulsion is a proven technology for land based vehicles. Especially in rough, impassable terrain they have shown reliable operation, superior traction capabilities and they can be used as a buoyancy body. Typical working territories for Archimedes driven are dredge deposit sites and swamps. The use of Archimedes screws will also prove their value in the deep sea mining application, but it will pose special demands and requirements on the propulsion system design such as: the propulsion system must be able to operate completely submerged and remotely operated. It must also in
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Sarkar, Mridul K., Neil Bose, Shuhong Chai, and Kim Dowling. "Conceptual Design of a Submersible Remotely Operated Swimming Dredger (SROSD)." In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-49868.

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Increasing use of deep-water dredging and mining vehicles has been anticipated for resource collection, engineering construction and environmental protection. Existing deep-dredging or mining equipment can be classified as i) diver-assisted dredging tools, ii) surface-floating dredgers with deep-dredging capability and iii) submersible dredgers. Diver assisted dredging tools have limited capacity and involve human risk. Surface floating dredgers can work to a specific dredging depth controlled by their ladder length, but modification is limited by their large size and significant cost. Submers
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Clarke, Douglas, Robert Diaz, and Robert Blama. "Monitoring Dispersion of Dredged Material Following Riverine Deep Trough Disposal." In Third Specialty Conference on Dredging and Dredged Material Disposal. American Society of Civil Engineers, 2003. http://dx.doi.org/10.1061/40680(2003)145.

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Oen, Amy M. P., Espen Eek, Morten Schaanning, Audun Hauge, Jens Skei, and Per O/ivind Halvorsen. "Disposal of Contaminated Sediments from Oslo Harbor in an Anoxic Deep-Water Basin." In Third Specialty Conference on Dredging and Dredged Material Disposal. American Society of Civil Engineers, 2003. http://dx.doi.org/10.1061/40680(2003)99.

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Wei, Changyun, Fusheng Ni, and Jinbao Yang. "A Revised Deep Belief Network for Predicting the Slurry Concentration of a Cutter Suction Dredger." In 2nd International Conference on Computer Engineering, Information Science & Application Technology (ICCIA 2017). Atlantis Press, 2017. http://dx.doi.org/10.2991/iccia-17.2017.92.

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Paulin, Mike, Joseph Cocker, Damien Humby, and Glenn Lanan. "Trenching Considerations for Arctic Pipelines." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23116.

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Offshore pipelines installed in the Arctic and other cold regions are often buried to reduce the risk of damage from ice gouging, upheaval buckling, and other loading challenges specific to the region. Pipeline burial is normally achieved through trench excavation and backfill. Pipelines have been buried using a wide variety of technologies including conventional excavation equipment, hydraulic dredges, ploughs, mechanical trenchers, and jetters. In order to determine a preferred trenching method for a particular route, consideration must be given to a variety of factors. The water depth range
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