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Thematische Bibliographien / Off-shore structures / Zeitschriftenartikel

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Zeitschriftenartikel zum Thema „Off-shore structures“

Autor: Grafiati

Veröffentlicht am 4. Juni 2021

Zuletzt aktualisiert am 20. Februar 2023

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1

Mortada, Mohamed, Mohamed Ahmed, Mohamed Morad, and Ahmed Alkaisy. "Sediment Transport Fields Around Off-Shore and On-Shore Structures." Fayoum University Journal of Engineering 4, no. 2 (June 1, 2021): 139–56. http://dx.doi.org/10.21608/fuje.2021.205539.

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2

Hanzawa, Minoru, Akira Matsumoto, and Hitoshi Tanaka. "STABILITY OF WAVE-DISSIPATING CONCRETE BLOCKS OF DETACHED BREAKWATERS AGAINST TSUNAMI." Coastal Engineering Proceedings 1, no. 33 (October 15, 2012): 24. http://dx.doi.org/10.9753/icce.v33.structures.24.

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In recent years, the risk of occurrence of tsunamis generated by near shore earthquakes, such as, Tokai, Tonankai, Nankai and off-Miyagi is considered to be higher than before, as well as off shore tsunamis traveling long distances, e.g., the 2010 Chilean tsunami. On March, 11th, 2011 the huge, devastating tsunami generated by The 2011 off the Pacific coast of Tohoku Earthquake attacked and damaged the east coast area of Japan. Tsunami forces onto vertical walls, such as seawalls, has already been studied in detail, e.g., Asakura et al.(2002) and Kato et al.(2006). In Japan, detached breakwate

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Salvadori, Gianfausto, Giuseppe Roberto Tomasicchio, and Felice D'Alessandro. "Multivariate approach to design coastal and off-shore structures." Journal of Coastal Research 65 (January 2, 2013): 386–91. http://dx.doi.org/10.2112/si65-066.1.

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4

Ragab, Ahmed, and Chung C. Fu. "Nonlinear free vibration of fixed off-shore framed structures." Computers & Structures 21, no. 6 (January 1985): 1373–78. http://dx.doi.org/10.1016/0045-7949(85)90191-9.

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5

Tomasicchio, Giuseppe Roberto, Elvira Armenio, Felice D'Alessandro, Nuno Fonseca, Spyros A. Mavrakos, Valery Penchev, Holger Schuttrumpf, Spyridon Voutsinas, Jens Kirkegaard, and Palle M. Jensen. "DESIGN OF A 3D PHYSICAL AND NUMERICAL EXPERIMENT ON FLOATING OFF-SHORE WIND TURBINES." Coastal Engineering Proceedings 1, no. 33 (December 14, 2012): 67. http://dx.doi.org/10.9753/icce.v33.structures.67.

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The knowledge of the behavior of floating offshore wind turbines (W/T) under wave and/or wind action remains one of the most difficult challenges in offshore engineering which is mostly due to the highly non-linear response of the structure. The present study describes the design process of a 3D physical experiment to investigate the behavior of the most promising structure technology of floating W/T: spar buoy (SB) and tension leg platform (TLP) under different meteo conditions. In order to properly design the two W/T models, the following topics have been analyzed: mooring lines, mass distri

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Moarefzadeh, M. R., and R. E. Melchers. "Sample-specific linearization in reliability analysis of off-shore structures." Structural Safety 18, no. 2-3 (January 1996): 101–22. http://dx.doi.org/10.1016/0167-4730(96)00014-8.

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7

Emi, Hirohiko, Michifumi Yuasa, Atsushi Kumano, Hiroyuki Kumamoto, Norio Yamamoto, and Masaki Matsunaga. "A Study on Life Assessment of Ships and Off-shore Structures." Journal of the Society of Naval Architects of Japan 1992, no. 172 (1992): 627–35. http://dx.doi.org/10.2534/jjasnaoe1968.1992.172_627.

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8

Emi, Hirohiko, Michifumi Yuasa, Atushi Kumano, Toshirou Arima, Norio Yamamoto, and Masatoshi Umino. "A Study on Life Assessment of Ships and Off-Shore Structures." Journal of the Society of Naval Architects of Japan 1993, no. 174 (1993): 735–44. http://dx.doi.org/10.2534/jjasnaoe1968.1993.174_735.

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9

WEST, BRUCE J. "EXTREMA OF FRACTAL RANDOM WATER WAVES." International Journal of Modern Physics B 10, no. 01 (January 10, 1996): 67–132. http://dx.doi.org/10.1142/s0217979296000052.

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Herein we review the statistical properties of the visibly random behavior of sea waves and the resulting stochastic forces loading off-shore structures and ships. The traditional assumption is that the statistics of the sea surface displacement produced by waves is Gaussian, or equivalently that the statistics of the wave amplitudes are Rayleigh. We examine this and a more general statistical hypothesis in this review, that being that the statistics of surface waves are Lévy stable, and investigate the response of dynamical models of off-shore structures to such stochastic forcing. We find th

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Lin, Jung-Tai. "EMPIRICAL PREDICTION OF WAVE SPECTRUM FOR WIND-GENERATED GRAVITY WAVES." Coastal Engineering Proceedings 1, no. 20 (January 29, 1986): 36. http://dx.doi.org/10.9753/icce.v20.36.

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Wind-Generated gravity wave has been of great interest to researchers and engineers in the field of coastal engineering because it is one of the important considerations in the engineering studies and designs for ship navigation, coastal and off-shore structures, shore protection, oil pollution control, and wave energy conversion. An accurate prediction of the wave height, wave frequency, and wave spectrum is critical to the success of these engineering studies and design.

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Vugteveen, Henk. "PIB Coatings for Off-Shore Rehabilitation of Pipes and Structures (above and underwater)." Rio Oil and Gas Expo and Conference 22, no. 2022 (September 26, 2022): 433–34. http://dx.doi.org/10.48072/2525-7579.rog.2022.433.

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Stoliarchuk, Yaroslava, Denys Ilnytskyy, and Glib Turolev. "GLOBAL BUSINESS NETWORK: OFF-SHORE MODEL’S DIVERSIFICATION AND IMPACT." Economics & Education 5, no. 2 (April 25, 2020): 20–29. http://dx.doi.org/10.30525/2500-946x/2020-2-3.

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Modern literature lacks systematization and assessment of impact of network of international corporations and their off-shore models on development of national economies in post-industrial times. There is variety of tools besides well-known multinational corporate accounting policies and strategies of MNCs that provide mechanism for the management of transaction costs in reporting period, thus reducing the amount of taxable profit due to application of the method of accelerated depreciation and channels of tax deferrals, which allow to reduce corporate tax payments owing to the objective reduc

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13

GÜRÇAY, Savas, and Günay ÇİFTÇİ. "CHIRP-ENGINEERING SEISMIC METHOD FOR EXPLORING SEABED AND UNDERWATER STRUCTURES: OFF-SHORE WESTERN ANATOLIA." Journal of Scientific Perspectives 4, no. 3 (August 5, 2020): 217–22. http://dx.doi.org/10.26900/jsp.4.018.

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CHIRP systems are widely used in seabed sediment classification, submarine faults, positioning of marine engineering structures, pipeline geotechnical studies, platform and well area assessments, archaeological and environmental impact assessments. The resolution of the system is in the order of decimeter. In this study, the characteristics of submarine active faults, buried faults, seabed and underlying layers in the region were analyzed and interpreted by CHIRP data collected off-shore Seferihisar, Teke Peninsula and Alaçatı.

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Okupnik, E. I., S. N. Zhiznyakov, L. L. Rubanovich, V. I. Novikov, V. N. Gorpneyuk, O. I. Steklov, E. A. Makhmudov, G. I. Khanguliev, and T. Sh Shirinov. "Assembly welding of one‐sided joints in structures of deep‐water stationary off‐shore platforms." Welding International 7, no. 4 (January 1993): 296–300. http://dx.doi.org/10.1080/09507119309548393.

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15

Liščić, Božidar, Ivo Senjanović, Većeslav Čorić, Hrvoje Kozmar, Marko Tomić, and Neven Hadžić. "Off shore Wind Power Plant in the Adriatic Sea: An Opportunity for the Croatian Economy." Transactions on Maritime Science 3, no. 2 (October 21, 2014): 103–10. http://dx.doi.org/10.7225/toms.v03.n02.001.

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The significant growth of renewable energy production in the past decades is present mainly due to the global depletion of fossil fuel reserves. One of interesting and well developed renewable energy technologies are wind turbines which are mainly built onshore. Due to more favorable wind characteristics at sea, off shore wind power plants are an interesting and challenging option for meeting future energy demands. In particular, less turbulent wind with higher average velocity enhances energy production and reduces structural fatigue of wind energy structures. In this study, benefits and draw

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Passchier, Sandra, Kenneth Rijsdijk, and Cees Laban. "Introduction." Netherlands Journal of Geosciences 84, no. 2 (July 2005): 59. http://dx.doi.org/10.1017/s0016774600022952.

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Coastal low-lands are densely populated areas characterized by large economic activity. The shallow subsurface plays an important role because of geotechnical requirements for the foundation of structures and its potential for natural resources, such as sand, gravel, and groundwater. The application of geo-scientific data requires that the subsurface is represented as 2D and 3D models displaying the stratigraphie relations of sedimentary rock units, both on-and off-shore.

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Vigneron, Adrien, Perrine Cruaud, Frederic Ducellier, Ian M. Head, and Nicolas Tsesmetzis. "Syntrophic Hydrocarbon Degradation in a Decommissioned Off-Shore Subsea Oil Storage Structure." Microorganisms 9, no. 2 (February 11, 2021): 356. http://dx.doi.org/10.3390/microorganisms9020356.

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Over the last decade, metagenomic studies have revealed the impact of oil production on the microbial ecology of petroleum reservoirs. However, despite their fundamental roles in bioremediation of hydrocarbons, biocorrosion, biofouling and hydrogen sulfide production, oil field and oil production infrastructure microbiomes are poorly explored. Understanding of microbial activities within oil production facilities is therefore crucial for environmental risk mitigation, most notably during decommissioning. The analysis of the planktonic microbial community from the aqueous phase of a subsea oil-

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Pietri, Alice, Pierre Testor, Vincent Echevin, Alexis Chaigneau, Laurent Mortier, Gerard Eldin, and Carmen Grados. "Finescale Vertical Structure of the Upwelling System off Southern Peru as Observed from Glider Data." Journal of Physical Oceanography 43, no. 3 (March 1, 2013): 631–46. http://dx.doi.org/10.1175/jpo-d-12-035.1.

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Abstract The upwelling system off southern Peru has been observed using an autonomous underwater vehicle (a Slocum glider) during October–November 2008. Nine cross-front sections have been carried out across an intense upwelling cell near 14°S. During almost two months, profiles of temperature, salinity, and fluorescence were collected at less than 1-km resolution, between the surface and 200-m depth. Estimates of alongshore absolute geostrophic velocities were inferred from the density field and the glider drift between two surfacings. In the frontal region, salinity and biogeochemical fields

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Magray, Adil Ahmad, Amanpreet Tangri, Zehra Khan, and Naiyara Khan. "Foundation engineering for offshore gravity structures." IOP Conference Series: Earth and Environmental Science 889, no. 1 (November 1, 2021): 012053. http://dx.doi.org/10.1088/1755-1315/889/1/012053.

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Abstract Gravity based structures are in play from early times. Numerous structures are being installed around the globe. These structures had shown a rigid face towards the harsh conditions/situation in the offshore environment. The key factors for sustainability are geotechnical design and the sub soil survey. These structures are used for collection, transport and also for temporary storage of crude gas and oil. These structures serve as a bridge between the much need fuel and the modern world. The installation of GBS involves major wings of modern engineering i.e. Mechanical, Structural, a

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MIURA, Fusanori, Itsuo NOZAWA, Nobuaki SAKAKI, and Katsushi HIRANO. "The effect of ice on the seismic response and dynamic stability against sliding of off-shore structures." Doboku Gakkai Ronbunshu, no. 409 (1989): 65–73. http://dx.doi.org/10.2208/jscej.1989.409_65.

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Grammatikos, Sotirios A., Ryan G. Jones, Mark Evernden, and Joao R. Correia. "Thermal cycling effects on the durability of a pultruded GFRP material for off-shore civil engineering structures." Composite Structures 153 (October 2016): 297–310. http://dx.doi.org/10.1016/j.compstruct.2016.05.085.

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Kahai, Harjot Singh, Mayur Paliwal, and Sumit Geete. "Experimental Study on Hematite Concreting." Materials Science Forum 866 (August 2016): 49–52. http://dx.doi.org/10.4028/www.scientific.net/msf.866.49.

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High Density concrete is commonly used for radiation shielding of nuclear-reactors and other structures like counter weights, coating of off-shore pipelines. High Density concrete or is designed by using heavy weight aggregates such as hematite, magnetite, barite etc. The material is called hematite is used in this special concrete. The mix used is for OPC 43grade of cement. High density concrete can be designed in same way as normal weight concretes, but the additional self-weight should be taken into account.

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Graversen, Ole. "Upper Triassic – Cretaceous stratigraphy and structural inversion off-shore SW Bornholm, Tornquist Zone, Denmark." Bulletin of the Geological Society of Denmark 51 (December 15, 2004): 111–36. http://dx.doi.org/10.37570/bgsd-2004-51-08.

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Geological interpretations by various authors of exploration reflection seismic data offshore SW Bornholm show good agreement for the Rønne Graben. However, major differences exist regarding the Mesozoic stratigraphy and structural development of the Arnager-Darlowo Block and the Risebæk Graben. Major problems relate to the distribution and structural position of the Jurassic, and interpretation of inversion structures in the Rønne and Kolobrzeg grabens along the Arnager Block. In addition to the Pernille-1 and Stina-1 wells that document the stratigraphy of the Rønne and Kolobrzeg graben sect

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Chiou, Shu-Fen, Jimmy Kuo, Tit-Yee Wong, Tung-Yung Fan, Kwee Siong Tew, and Jong-Kang Liu. "Analysis of the coral associated bacterial community structures in healthy and diseased corals from off-shore of southern Taiwan." Journal of Environmental Science and Health, Part B 45, no. 5 (June 4, 2010): 408–15. http://dx.doi.org/10.1080/03601231003800032.

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Dempster, Tim, and Michael J. Kingsford. "Drifting objects as habitat for pelagic juvenile fish off New South Wales, Australia." Marine and Freshwater Research 55, no. 7 (2004): 675. http://dx.doi.org/10.1071/mf04071.

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The importance of drifting objects to small juvenile pelagic fish was investigated off the coast of New South Wales, Australia. Distance-related and temporal patterns in the distribution of clumps of drifting algae were investigated with 5000 m2 transects at five distances from shore (0.1, 0.5, 1, 5 and 10 km), two to three times per season for 2 years. Juvenile fish associated with drift algae were collected. Clumps of algae, predominantly Sargassum spp., were most abundant in spring, which coincided with the highest abundance of alga-associated post-flexion juvenile fish. Drift algae were al

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Chavez, Arturo Gomez, Christian A. Mueller, Tobias Doernbach, and Andreas Birk. "Underwater navigation using visual markers in the context of intervention missions." International Journal of Advanced Robotic Systems 16, no. 2 (March 1, 2019): 172988141983896. http://dx.doi.org/10.1177/1729881419838967.

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Intervention missions, that is, underwater manipulation tasks, for example, in the context of oil-&-gas production, require a high amount of precise, robust navigation. In this article, we describe the use of an advanced vision system suited for deep-sea operations, which in combination with artificial markers on target structures like oil-&-gas production-Christmas-trees significantly boosts navigation performance. The system is validated in two intensive field tests running off the shore of Marseille, France. In the experiments, a commercial remotely operated vehicle equipped with th

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KAN, Katsushige, Kazuo ASO, and Hitoshi DOKI. "A simple method for analizing multi-leg-structures. Study on the lateral vibration of the off-shore structure(3rd Report)." Shigen-to-Sozai 106, no. 4 (1990): 167–72. http://dx.doi.org/10.2473/shigentosozai.106.167.

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di Lorenzo, Emilio, Simone Manzato, Bart Peeters, and Herman van der Auweraer. "Virtual Structural Monitoring of Wind Turbines Using Operational Modal Analysis Techniques." Key Engineering Materials 569-570 (July 2013): 523–30. http://dx.doi.org/10.4028/www.scientific.net/kem.569-570.523.

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Operational Modal Analysis (OMA), also known as output-only modal analysis, allows identifying modal parameters only by using the response measurements of the structures in operational conditions when the input forces cannot be measured. These information can then be used to improve numerical models in order to monitor the operating and structural conditions of the system. This is a critical aspect both for condition monitoring and maintenance of large wind turbines, particularly in the off-shore sector where operation and maintenance represent a high percentage of total costs. Although OMA is

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OLIVEIRA, Márcio Ulguim, Luciano Volcanoglo BIEHL, Jorge Luiz Braz MEDEIROS, César Antonio Oropesa AVELLANEDA, Carlos Otávio Damas MARTINS, José de SOUZA, and Frederico SPORKET. "Manufacturing Against Corrosion: Increasing Materials Performance by the Combination of Cold Work and Heat Treatment for 6063 Aluminium Alloy." Materials Science 26, no. 1 (November 8, 2019): 30–33. http://dx.doi.org/10.5755/j01.ms.26.1.17683.

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Nowadays, the search for more reliable and less fuel consumable structures for off shore applications leads to the development of modern materials selection and manufacturing methodologies. In this sense, Aluminum alloys has increasing for structural application due to lightweight, weldability and corrosion performance. This research aims to evaluate the influence of manufacturing process of 6063 aluminum alloy on corrosion behavior in seawater medium. After the combination of heat treatment and cold work variation, the materials were analyzed by microstructural and mechanical tests. The sampl

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Rana, Fabio M., Maria Adamo, Guido Pasquariello, Giacomo De Carolis, and Sandra Morelli. "LG-Mod: A Modified Local Gradient (LG) Method to Retrieve SAR Sea Surface Wind Directions in Marine Coastal Areas." Journal of Sensors 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/9565208.

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This paper describes a novel SAR wind direction estimation method based on the computation of local gradients over quasi-linear and quasi-periodic structures detected by SAR imagery. The method relies upon the standard LG method for the part relevant to the computation of the local gradients. The novelty is that the dominant local wind direction and related accuracy are estimated using results derived from the Directional Statistics. The LG-Mod is validated against in situ coastal wind measurements provided by instrumented buoys with 63 ENVISAT ASAR images. Results show an overall agreement wi

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Caruso, Maria Chiara, Carmine Pascale, Esteban Camacho, and Liberato Ferrara. "Comparative environmental and social life cycle assessments of off-shore aquaculture rafts made in ultra-high performance concrete (UHPC)." International Journal of Life Cycle Assessment 27, no. 2 (February 2022): 281–300. http://dx.doi.org/10.1007/s11367-021-02017-6.

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Abstract Purpose This paper aims to compare the environmental and social impacts of three types of rafts for mussel farming in Spain. These structures, traditionally made of wood, have a short lifespan and, because of their service conditions, require frequent maintenance in order to be fully operational. An innovative solution made with ultra-high performance concrete (UHPC) was developed in 2016 by RDC, being at the base of the pilots of the EU-funded project ReSHEALience (H2020-GA760824). Methods In order to quantify the environmental and social impacts generated by alternative solutions fo

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Avedik, F., V. Renard, J. P. Allenou, and B. Morvan. "“Single bubble” air‐gun array for deep exploration." GEOPHYSICS 58, no. 3 (March 1993): 366–82. http://dx.doi.org/10.1190/1.1443420.

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Large tuned air‐gun arrays operated in off‐shore petroleum exploration are also used for deep penetration marine seismic reflection surveys conducted to define structures in the earth’s crust. Because of the attenuation of higher frequencies, the useful upper frequency limit of these records is usually about 50–60 Hz. The aim of this paper is to report on a method of seismic pulse generation that preferentially concentrates the air gun’s energy in the low range of the seismic frequency band by centering the output on the first “bubble pulse” instead of the initial (primary) pulse. Experimental

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Bravo, L., M. Ramos, O. Astudillo, B. Dewitte, and K. Goubanova. "Seasonal variability of the Ekman transport and pumping in the upwelling system off central-northern Chile (~ 30° S) based on a high-resolution atmospheric regional model (WRF)." Ocean Science Discussions 12, no. 6 (December 8, 2015): 3003–41. http://dx.doi.org/10.5194/osd-12-3003-2015.

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Abstract. Two physical mechanisms can contribute to coastal upwelling, offshore Ekman transport and Ekman pumping due to the cyclonic wind stress curl, mainly caused by the abrupt decrease in wind stress (drop-off) in a cross-shore band of 100 km. This wind drop-off is thought to be an ubiquitous feature in coastal upwelling systems and to regulate the relative contribution of both mechanisms. It has been poorly studied along the central-northern Chile region because of the lack in wind measurements along the shoreline and of the relatively low-resolution of the available atmospheric Reanalysi

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Tripoli, Gregory J. "Numerical Study of the 10 January 1998 Lake-Effect Bands Observed during Lake-ICE." Journal of the Atmospheric Sciences 62, no. 9 (September 1, 2005): 3232–49. http://dx.doi.org/10.1175/jas3462.1.

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Abstract This paper presents the results of a series of idealized cloud resolving simulations of the evolution of moist roll convection observed as part of the Lake-Induced Convection Experiment (Lake-ICE) that took place during the 1997/98 winter over central Lake Michigan. Satellite and radar observations of the roll convection depict striking linear rolls stretching from 10 km off the western shore of the lake, across to the eastern shore, and then continuing across Michigan. The spacing of the primary rolls was observed to be 6 km, giving a ratio of spacing to depth of about 5:1, which is

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Kasprzak, R. A., and W. S. Perret. "USE OF OIL AND GAS PLATFORMS AS HABITAT IN LOUISIANA'S ARTIFICIAL REEF PROGRAM." APPEA Journal 36, no. 1 (1996): 681. http://dx.doi.org/10.1071/aj95048.

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Louisiana's offshore oil and gas industry began in 1947 when the first well was drilled out of sight of land south of Terrebonne Parish. Today over 3,700 offshore oil and gas platforms have been installed, supplying 25 per cent of the United States' production of natural gas and 12.5 per cent of its oil. In addition to meeting the world's energy needs, these structures also form one of the world's most extensive defacto artificial reef systems. However, federal regulations require that these structures be removed within 1 year after the lease is terminated. Disposal of obsolete offshore oil an

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Cleary, Joe. "The English Department as Imperial Commonwealth, or The Global Past and Global Future of English Studies." boundary 2 48, no. 1 (February 1, 2021): 139–76. http://dx.doi.org/10.1215/01903659-8821461.

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Though canons and faculty have greatly diversified in recent decades, English departments around the world fundamentally prioritize English and American literatures. To this extent, they resemble the Anglo-American imperial commonwealths that some toward the end of the nineteenth century advocated for in order to stave off the decline of the British Empire and to shore up a permanent Anglo-American supremacy against all threats. Still, as the English language becomes “global,” English departments today founder for a variety of reasons and convey a persistent sense of crisis. Has the time come

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Deendayal, R., T. G. Sitharam, and K. Muthukkumaran. "Effect of Earthquake on a Single Pile Located in Sloping Ground." International Journal of Geotechnical Earthquake Engineering 7, no. 1 (January 2016): 57–72. http://dx.doi.org/10.4018/ijgee.2016010104.

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Piles are often constructed on natural slope such as sea bed slope in off-shore structures. When piles are constructed on sloping ground, the behaviour of piles under earthquake loading is different from the piles on horizontal ground surface. The dynamic response of a pile subjected to external excitation is a complex phenomenon resulting from the interactions between the pile and the surrounding soil. In the present study, a finite element analysis of a single field pile located on sloping ground was carried out. A single pile of length 30m with embedment length to diameter ratios (L/D) 20,

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KOMAROVA, NATALIA L., and ALAN C. NEWELL. "Nonlinear dynamics of sand banks and sand waves." Journal of Fluid Mechanics 415 (July 25, 2000): 285–321. http://dx.doi.org/10.1017/s0022112000008855.

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Sand banks and sand waves are two types of sand structures that are commonly observed on an off-shore sea bed. We describe the formation of these features using the equations of the fluid motion coupled with the mass conservation law for the sediment transport. The bottom features are a result of an instability due to tide–bottom interactions. There are at least two mechanisms responsible for the growth of sand banks and sand waves. One is linear instability, and the other is nonlinear coupling between long sand banks and short sand waves. One novel feature of this work is the suggestion that

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Elías, Matías W., Fabio I. Zyserman, Marina Rosas-Carbajal, and María Constanza Manassero. "Three-dimensional modelling of controlled source electro-magnetic surveys using non-conforming finite element methods." Geophysical Journal International 229, no. 2 (December 28, 2021): 1133–51. http://dx.doi.org/10.1093/gji/ggab524.

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SUMMARY The controlled source electro-magnetic (CSEM) method is increasingly used for in-land and off-shore subsurface characterization. Given its complex dependence between data and the parameters of interest, there is a crucial need for performant numerical algorithms that can simulate the CSEM response of 3-D geological structures. Here, we present two finite element (FE) algorithms for simulating the CSEM response in 3-D media with isotropic conductivity. A primary/secondary field approach is used to avoid the singularity introduced by the source. The primary field is computed semi-analyti

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Bravo, Luis, Marcel Ramos, Orlando Astudillo, Boris Dewitte, and Katerina Goubanova. "Seasonal variability of the Ekman transport and pumping in the upwelling system off central-northern Chile (∼ 30° S) based on a high-resolution atmospheric regional model (WRF)." Ocean Science 12, no. 5 (September 8, 2016): 1049–65. http://dx.doi.org/10.5194/os-12-1049-2016.

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Abstract. Two physical mechanisms can contribute to coastal upwelling in eastern boundary current systems: offshore Ekman transport due to the predominant alongshore wind stress and Ekman pumping due to the cyclonic wind stress curl, mainly caused by the abrupt decrease in wind stress (drop-off) in a cross-shore band of 100 km. This wind drop-off is thought to be an ubiquitous feature in coastal upwelling systems and to regulate the relative contribution of both mechanisms. It has been poorly studied along the central-northern Chile region because of the lack in wind measurements along the sho

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Nagano, Akira, Takuya Hasegawa, Keisuke Ariyoshi, and Hiroyuki Matsumoto. "Interannual Bottom-Intensified Current Thickening Observed on the Continental Slope Off the Southeastern Coast of Hokkaido, Japan." Fluids 7, no. 2 (February 19, 2022): 84. http://dx.doi.org/10.3390/fluids7020084.

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By rotary empirical orthogonal function and coastal-trapped wave mode analyses, we analyzed current velocity data, collected from 2001 to 2016. The data were obtained by an acoustic Doppler current profiler, deployed upward at a location of 41°39.909′ N, 144°20.695′ E, on a 2630-m deep continental slope seabed off the southeastern coast of Hokkaido, Japan. The results indicate that the current intensifies toward the bottom and is directed nearly toward the shore, reaching an average speed of ~2.5 cm s−1 just above the bottom. The thickness of the along-slope northward component of the bottom-i

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Sirajudeen, Rahima Shabeen, and Alagusundaramoorthy P. "GFRP Stiffened Plate with Square Cutout under Axial and Out-of-Plane Load." Polymers 13, no. 8 (April 7, 2021): 1185. http://dx.doi.org/10.3390/polym13081185.

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The high-strength-to-weight ratio and corrosion resistance properties of glass-fiber-reinforced polymer (GFRP) composites makes them potentially well-suited for application in ship structures, bridges and off-shore oil platforms. These structures are often formed by stiffened plates and are subjected to axial load and out-of-plane load. Cutouts and openings are provided in the plates for access and maintenance. The main objective of this study was to examine the buckling behavior of GFRP-stiffened composite plates with square cutouts under a combination of axial and out-of-plane load up to fai

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Dmitrenko, Igor A., Sergey A. Kirillov, Bert Rudels, David G. Babb, Leif Toudal Pedersen, Søren Rysgaard, Yngve Kristoffersen, and David G. Barber. "Arctic Ocean outflow and glacier–ocean interactions modify water over the Wandel Sea shelf (northeastern Greenland)." Ocean Science 13, no. 6 (December 11, 2017): 1045–60. http://dx.doi.org/10.5194/os-13-1045-2017.

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Abstract. The first-ever conductivity–temperature–depth (CTD) observations on the Wandel Sea shelf in northeastern Greenland were collected in April–May 2015. They were complemented by CTDs taken along the continental slope during the Norwegian FRAM 2014–2015 drift. The CTD profiles are used to reveal the origin of water masses and interactions with ambient water from the continental slope and the tidewater glacier outlet. The subsurface water is associated with the Pacific water outflow from the Arctic Ocean. The underlying halocline separates the Pacific water from a deeper layer of polar wa

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Lovy, J., NL Lewis, SE Friend, KW Able, MJ Shaw, GS Hinks, and PJ Clarke. "Host, seasonal and habitat influences on incidence of Lernaeenicus radiatus (Copepoda: Pennellidae) in the mid-Atlantic Bight." Marine Ecology Progress Series 642 (May 28, 2020): 83–101. http://dx.doi.org/10.3354/meps13326.

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Lernaeenicus radiatus is a pennellid copepod with a 2-host life cycle that exhibits high host-specificity to their first host, black sea bass Centropristis striata. This parasite was prevalent in the gills of black sea bass juveniles and adults along the coast of New Jersey, USA, April to December 2019. Parasite incidence was high in the summer and fall in near-shore areas and dropped significantly in fish from deep waters further off-shore in December. Heavy infections of L. radiatus occurred in gills of adult black sea bass inhabiting reef-associated structures, in which parasite incidence r

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Cadoni, Ezio, Matteo Dotta, and Daniele Forni. "Modern high strength steels under high strain-rate regimes." EPJ Web of Conferences 250 (2021): 05013. http://dx.doi.org/10.1051/epjconf/202125005013.

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In order to properly design critical infrastructures and buildings in steel (bridges, high-rise building, off-shore, cranes, etc.), certain requirements concerning to mechanical resistance and robustness under exceptional actions have to be carefully fulfilled. An acceptable level of safety must be assured to avoid human loss, environmental pollution and material damage. These structures can be subjected to severe accidental loading such as blast or impact. In this context it is fundamental to adequately know the behaviour of structural steel under high strain rate. Modern high strength steels

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Małecki, Józef. "Fuzzy Track-Keeping Steering Design for a Precise Control of the Ship." Solid State Phenomena 196 (February 2013): 140–47. http://dx.doi.org/10.4028/www.scientific.net/ssp.196.140.

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In this paper we design the fuzzy logic autopilot to precise control and a track-keeping control of the ship. Precise control of ship has known an increasing interest in the last years. The main benefits of usage of autopilot for control of ship can be removing a man from the dangers of the undersea environment and reduction in cost of exploration of deep seas. Currently, it is common to use the special ship to accomplish missions as the inspection of coastal and off-shore structures, cable maintenance, as well as hydrographical surveys. In the military field they are employed in such tasks as

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De Leo, Francesco, Giovanni Besio, and Lorenzo Mentaschi. "Trends and variability of ocean waves under RCP8.5 emission scenario in the Mediterranean Sea." Ocean Dynamics 71, no. 1 (November 20, 2020): 97–117. http://dx.doi.org/10.1007/s10236-020-01419-8.

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AbstractWind-generated ocean waves are key inputs for several studies and applications, both near the coast (coastal vulnerability assessment, coastal structures design, harbor operativity) and off-shore (a.o. oil and gas production, ship routes, and navigation safety). As such, the evaluation of trends in future wave climate is fundamental for the development of efficient policies in the framework of climate change adaptation and mitigation measures. This study focuses on the Mediterranean Sea, an area of primary interest, since it plays a crucial role in the worldwide maritime transport and

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Lemartinel, Antoine, Mickaël Castro, Olivier Fouché, Julio-César De Luca, and Jean-François Feller. "Strain Mapping and Damage Tracking in Carbon Fiber Reinforced Epoxy Composites during Dynamic Bending Until Fracture with Quantum Resistive Sensors in Array." Journal of Composites Science 5, no. 2 (February 20, 2021): 60. http://dx.doi.org/10.3390/jcs5020060.

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The sustained development of wind energies requires a dramatic rising of turbine blade size especially for their off-shore implantation, which requires as well composite materials with higher performances. In this context, the monitoring of the health of these structures appears essential to decrease maintenance costs, and produce a cheaper kwh. Thus, the input of quantum resistive sensors (QRS) arrays, to monitor the strain gradient in area of interest and anticipate damage in the core of composite structures, without compromising their mechanical properties, sounds promising. QRS are nanostr

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Bamonte, Patrick, and Pietro Gambarova. "Properties of Concrete Subjected to Extreme Thermal Conditions." Journal of Structural Fire Engineering 5, no. 1 (March 1, 2014): 47–62. http://dx.doi.org/10.1260/2040-2317.5.1.47.

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Durability, high-temperature resistance, impact and blast resilience, radiation-shielding properties, irradiation endurance and - of course - good mechanical properties are required of the cementitious composites to be used in a variety of high-performance structures. Among these, tall buildings, road and railway tunnels, off-shore platforms, gasification plants, wind and solar mills for the production of "clean" energy should be mentioned, as well as nuclear power plants, and radioactive- and hazardous-waste repositories. Hence, understanding, measuring and modelling concrete behavior under e

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Abramovitz, T., and H. Thybo. "Pre-Zechstein structures around the MONA LISA deep seismic lines in the southern Horn Graben area." Bulletin of the Geological Society of Denmark 45 (January 30, 1999): 99–116. http://dx.doi.org/10.37570/bgsd-1998-45-10.

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Seismic reflection data from the Horn Graben area in the southeastern part of the North Sea, off-shore Denmark, have been interpreted to illustrate the upper crustal structures around the MONA LISA deep seismic lines. The study area comprises the southern Horn Graben area and the eastern part of East North Sea High, where the Caledonian collision suture between Baltica and Eastern Avalonia bends such that the strike direction changes from ESE in the south to NNW in the north. Integrated interpretation of normal-incidence reflection data and wide-angle refraction data reveals substantial occurr

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