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description Publication2014Publisher:ISEC Press Authors: Taek Hee Han; Deok-Hee Won; Sang Ryang Yoo; Jin-Hak Yi;Taek Hee Han; Deok-Hee Won; Sang Ryang Yoo; Jin-Hak Yi;A double-skinned composite tubular (DSCT) offshore wind power tower was proposed and automatic section design software was developed. The developed software adopted a nonlinear material and nonlinear column model. As long as the outer diameter, material properties, and requested capacities are known for the DSCT wind power tower, the developed software can perform axial force-bending moment-interaction analyses for hundreds of sections of the tower, as well as suggest ten optimized cross-sectional designs. Assuming that the inner and outer tubes were made of steel, the software performed experimental design processes for a 5.0 MW and a 3.6 MW turbine. The software suggested rational and satisfactory section designs, and showed the possibility of a DSCT tower being used as an offshore wind power tower.
Proceedings of Inter... arrow_drop_down Proceedings of International Structural Engineering and ConstructionArticle . Dataset . 2014 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Proceedings of Inter... arrow_drop_down Proceedings of International Structural Engineering and ConstructionArticle . Dataset . 2014 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publication2018Publisher:ISEC Press Authors: Haeyoung Kim; Kunio Mizutani; Syojiro Motoyui;Haeyoung Kim; Kunio Mizutani; Syojiro Motoyui;During the Great East Japan Earthquake of March 2011, nonstructural components, such as pipe systems, ducts, cable racks and ceilings were severely damaged while main structural members in the building were not damaged seriously. Pipes, cable racks, apparatus and ducts’ hanger bolts were ruptured causing the equipment to fall down. Because of these damages, buildings cannot be used for a long period of time and one person was killed by pipe’s falling in Japan. In this study, the behaviors of nonstructural components are investigated by conducting shaking table tests to verify the cause of damage. More specifically, damage to hanger bolts is investigated by simulating its rupturing mechanism through shaking table test. To simulate the real installation condition of nonstructural components, apparatus-duct-pipe system supported by hanger bolts is selected as specimen. Roof floor response wave at the actual 5-story steel building under the Great East Japan Earthquake and sweep wave are used for the input waves. The maximum response acceleration was about 4 G in X direction under response wave 75% and the damage occurred at the metal fitting which is the connection part between braces and hanger bolt. And without installing braces, the upper hanger bolts at the fixed supporting part were ruptured easily since the natural frequency of the specimen closed to those of target building during excitations and the response became huge.
Proceedings of Inter... arrow_drop_down Proceedings of International Structural Engineering and ConstructionArticle . Dataset . 2018 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Proceedings of Inter... arrow_drop_down Proceedings of International Structural Engineering and ConstructionArticle . Dataset . 2018 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2014 EnglishPublisher:PANGAEA Funded by:EC | ERA-CLIMEC| ERA-CLIMPANGAEA - Data Publi... arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2014License: CC BY NCData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1594/pangaea.822240&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!visibility 2visibility views 2 Powered bymore_vert PANGAEA - Data Publi... arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2014License: CC BY NCData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2013Embargo end date: 12 Apr 2013 EnglishPublisher:Dryad Authors: Holland, Steven M.; Christie, Max;Holland, Steven M.; Christie, Max;doi: 10.5061/dryad.1779g
Models presented here of shallow-marine siliciclastic deposition show that the widths of depth-defined regions differ markedly in response to sea-level change. These models add to recent studies that have emphasized the highly specific response of habitat area to sea-level change. Collectively, these studies indicate that a particular bathymetric zone on a particular margin may vary substantially in area during a sea-level change, while other such zones and margins may experience little or even opposite responses. In the models presented here, intermediate- depth and deep-water regions tend to show sinusoidal variations in width, with widening during relative falls in sea level and narrowing during relative rises. The shallow-water region displays markedly non-sinusoidal change and is consistently characterized by abrupt widening at the beginning of the highstand systems tract and an equally abrupt narrowing at the onset of sea-level fall at the beginning of the falling-stage systems tract. These onshore-offshore differences in how width and area change with sea level may explain why taxa in shallow- water settings tend to be more abundant, eurytopic, and widespread than those in deeper-water settings. Likewise, these models suggest that the evolution of novelty in nearshore habitats may be a response to wide variation in shallow-marine area during sea-level change. R and Matlab code for Holland and Christie 2013Contains R and Matlab functions for simulating and measuring the changes in the width of depth-defined zones during changes in sea levelHollandChristieSupplementaryMaterials.rtf
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!visibility 19visibility views 19 download downloads 2 Powered bymore_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Collection , Dataset 2003 EnglishPublisher:PANGAEA Authors: Maruyama, Toshiaki; Shiono, Masamichi;Maruyama, Toshiaki; Shiono, Masamichi;Late Neogene biostratigraphy of diatoms has been investigated from two sites occupied during Ocean Drilling Program (ODP) Leg 186 off the coast of northeast Japan. A unique aspect of ODP Leg 186 was the installation of two permanent borehole geophysical observatories at the deep-sea terrace along the Japan Trench. The Neogene subsidence history of the forearc was documented from both Sites 1150 and 1151, and Quaternary to middle Miocene (16 Ma) sediments represent a nearly continuous stratigraphic sequence including numerous ash records, especially during the past 9 m.y. Diatoms are found in most samples in variable abundance and in a moderately well preserved state throughout the sequence. The assemblages are characterized consistently by age-diagnostic species of Denticulopsis and Neodenticula found in regions of high surface water productivity typical of middle to high latitudes. The Neogene North Pacific diatom zonation divides the Miocene to Quaternary sequences fundamentally well, except that the latest Miocene through early Pliocene Thalassiosira oestrupii Subzone is not applicable. Miocene and late Pliocene through Pleistocene diatom datum levels that have been proven to be of great stratigraphic utility in the North Pacific Ocean appear to be nearly isochronous within the level of resolution constrained by core catcher sample spacing. The taxonomy and stratigraphy of previously described species determined to be useful across the Miocene/Pliocene boundary have been investigated on the basis of the evolutionary changes within the Thalassiosira trifulta group. The biostratigraphically important forms belonging to the genus Thalassiosira have been illustrated with scanning electron micrographs. Supplement to: Maruyama, Toshiaki; Shiono, Masamichi (2003): Middle Miocene to Pleistocene diatom biostratigraphy of the Northwest Pacific at Sites 1150 and 1151. In: Suyehiro, K; Sacks, IS; Acton, GD; Oda, M (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 186, 1-38
PANGAEA - Data Publi... arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceCollection . 2003License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert PANGAEA - Data Publi... arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceCollection . 2003License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Collection , Dataset 1982 EnglishPublisher:PANGAEA Authors: Papavassiliou, C T; Cosgrove, M E;Papavassiliou, C T; Cosgrove, M E;Detailed major- and trace-element chemistry is presented for 41 sediment samples from DSDP Site-223 borehole cores. A marked change in chemical (and mineralogical) character is shown at the end of the Early Miocene Epoch which relates to tectonic events and associated changes in sedimentary regime. Enrichment in the contents of such elements as Mg, Cr and Ni compared with average values for fine-grained sediments occurs throughout the sequence and is particularly marked in the upper group of samples. A basic-ultrabasic provenance is suggested - the Oman ophiolites.Leaching with combined acid-reducing agent indicated typical lithogenous-character ordering for the elements and emphasised the enrichment of Mg, Cr, Ni (and Li, Cu, Zn, Pb, Fe and Ti) over values for near-shore muds and terrigenous material.Factor analysis on the bulk chemical data identifies the main lithogenous and biogenous components, subdividing the latter. It separates the upper and lower group of chemically dissimilar sediments and delineates a Mn-hydroxide phase. It also shows the essentially independent roles of Na, Ba and P. Supplement to: Papavassiliou, C T; Cosgrove, M E (1982): The geochemistry of DSDP sediments from Site 223, Indian Ocean. Chemical Geology, 37(3-4), 299-315
PANGAEA arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceCollection . 1982License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert PANGAEA arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceCollection . 1982License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1594/pangaea.700889&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Collection , Dataset 2021Publisher:Geological Society of London Authors: Cone, Dylan; Kopylova, Maya;Cone, Dylan; Kopylova, Maya;Low-Cr and high-Cr clinopyroxene, garnet, olivine, and ilmenite megacrysts from the Muskox kimberlite (Canada) were analyzed for major and trace elements, as well as Sr, Nd, and Pb isotopes. Samples display compositional overlap with respective phases in websterites, while clinopyroxene isotope systematics reveal similarities with both websteritic and metasomatic clinopyroxene in peridotites from the same kimberlite, in addition to Muskox and Jericho kimberlites. All lithologies may represent the products of mixing between EM1 mantle, relic Proterozoic enriched mantle and HIMU carbonatitic fluid. Equilibrium melts calculated from clinopyroxene trace element data using experimental distribution coefficients for feasible proto kimberlitic melts yield a range of metasomatic agents. Conclusion on the carbonate bearing nature of the metasomatism is based on the presence of a HIMU isotopic signature and results obtained from thermodynamic modeling using the Deep Earth Water model. Modelling was carried out with three fluid compositions; asthenospheric, eclogitic and kimberlitic. Our results suggest mineral compositions analogous to megacrysts cannot be produced by metasomatism of mantle peridotite by carbonate-free hydrous fluids. Isotope systematics argue against a strictly cognate relationship between megacrysts and their host kimberlite, instead suggesting megacrysts and websterites may represent products of regional metasomatism by carbonatitic HIMU fluids shortly predating kimberlite magmatism.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2011 EnglishPublisher:PANGAEA Authors: Borges, Alberto Vieira;Borges, Alberto Vieira;Cruise QC flag: D (see further details). The Fair Data Use Statement for SOCAT can be found at hdl:10013/epic.48576.d001
PANGAEA - Data Publi... arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2011License: CC BYData sources: DatacitePANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2014License: CC BYData sources: DatacitePANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2016License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert PANGAEA - Data Publi... arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2011License: CC BYData sources: DatacitePANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2014License: CC BYData sources: DatacitePANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2016License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Collection , Dataset 2017 EnglishPublisher:PANGAEA Funded by:NSF | U.S. - Thailand Collabora...NSF| U.S. - Thailand Collaboration: Geologic Records of Tropical Cyclone Strikes on the Gulf of Thailand Coast.Authors: Williams, Harry; Choowong, Montri; Phantuwongraj, Sumet; Surakietchai, Peerasit; +3 AuthorsWilliams, Harry; Choowong, Montri; Phantuwongraj, Sumet; Surakietchai, Peerasit; Thongkhao, Thanakrit; Kongsen, Stapana; Simon, Eric;Washover sedimentation resulting from modern typhoon strikes on the Gulf of Thailand coast forms anomalous sand layers in low-energy coastal environments including marshes, ponds and swales. The primary diagnostic for recognizing prehistoric typhoon-deposited sand layers in the geologic record are sharp upper and lower contacts between coarser-grained transported sand layers and finer-grained in-situ sediments. In this first paleotempestology study in Thailand, cores from two low-energy settings on the Gulf of Thailand coast - a coastal marsh near Cha-am and beach ridge plain swales near Kui Buri - reveal geologic evidence of up to 19 typhoon strikes within the last 8000 years. The sand layers have sharp upper and lower contacts with enclosing finer sediments. Some sand layers also contain other evidence of a sudden powerful landward-directed surge of ocean water, including gravel-sized clasts, offshore foraminifera, abundant shell fragments, plant debris and mud rip-up clasts. Sand layers record eleven typhoon strikes at Cha-am, ranging in age from AD 1952 to 7575 cal. yr. BP, and eight typhoon strikes at Kui Buri, ranging in age from 4075 to 7740 cal. yr. BP. Bayesian age?depth models, derived from eight AMS radiocarbon dates, suggest that the frequency of typhoon strikes was 2-5 times greater from 3900 to 7800 cal. yr. BP compared to 0-3900 cal. yr. BP. Possible explanations for this variability in the typhoon record are that typhoons were more frequent and/or more intense in Southeast Asia in the mid-Holocene because of climatic changes associated with the Mid-Holocene Warm Period or that the record reflects site sensitivity changes resulting from a mid-Holocene sea-level highstand. The preliminary finding of a possible link between warmer conditions and a greater frequency of intense typhoon strikes could have important societal implications, given possible consequences of ongoing global warming. Supplement to: Williams, Harry; Choowong, Montri; Phantuwongraj, Sumet; Surakietchai, Peerasit; Thongkhao, Thanakrit; Kongsen, Stapana; Simon, Eric (2016): Geologic records of Holocene typhoon strikes on the Gulf of Thailand coast. Marine Geology, 372, 66-78
PANGAEA arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceCollection . 2017License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert PANGAEA arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceCollection . 2017License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2017 EnglishPublisher:PANGAEA Authors: Rehder, Gregor; Glockzin, Michael;Rehder, Gregor; Glockzin, Michael;Cruise QC flag: E (see further details).
PANGAEA arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2017License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert PANGAEA arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2017License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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description Publication2014Publisher:ISEC Press Authors: Taek Hee Han; Deok-Hee Won; Sang Ryang Yoo; Jin-Hak Yi;Taek Hee Han; Deok-Hee Won; Sang Ryang Yoo; Jin-Hak Yi;A double-skinned composite tubular (DSCT) offshore wind power tower was proposed and automatic section design software was developed. The developed software adopted a nonlinear material and nonlinear column model. As long as the outer diameter, material properties, and requested capacities are known for the DSCT wind power tower, the developed software can perform axial force-bending moment-interaction analyses for hundreds of sections of the tower, as well as suggest ten optimized cross-sectional designs. Assuming that the inner and outer tubes were made of steel, the software performed experimental design processes for a 5.0 MW and a 3.6 MW turbine. The software suggested rational and satisfactory section designs, and showed the possibility of a DSCT tower being used as an offshore wind power tower.
Proceedings of Inter... arrow_drop_down Proceedings of International Structural Engineering and ConstructionArticle . Dataset . 2014 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Proceedings of Inter... arrow_drop_down Proceedings of International Structural Engineering and ConstructionArticle . Dataset . 2014 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publication2018Publisher:ISEC Press Authors: Haeyoung Kim; Kunio Mizutani; Syojiro Motoyui;Haeyoung Kim; Kunio Mizutani; Syojiro Motoyui;During the Great East Japan Earthquake of March 2011, nonstructural components, such as pipe systems, ducts, cable racks and ceilings were severely damaged while main structural members in the building were not damaged seriously. Pipes, cable racks, apparatus and ducts’ hanger bolts were ruptured causing the equipment to fall down. Because of these damages, buildings cannot be used for a long period of time and one person was killed by pipe’s falling in Japan. In this study, the behaviors of nonstructural components are investigated by conducting shaking table tests to verify the cause of damage. More specifically, damage to hanger bolts is investigated by simulating its rupturing mechanism through shaking table test. To simulate the real installation condition of nonstructural components, apparatus-duct-pipe system supported by hanger bolts is selected as specimen. Roof floor response wave at the actual 5-story steel building under the Great East Japan Earthquake and sweep wave are used for the input waves. The maximum response acceleration was about 4 G in X direction under response wave 75% and the damage occurred at the metal fitting which is the connection part between braces and hanger bolt. And without installing braces, the upper hanger bolts at the fixed supporting part were ruptured easily since the natural frequency of the specimen closed to those of target building during excitations and the response became huge.
Proceedings of Inter... arrow_drop_down Proceedings of International Structural Engineering and ConstructionArticle . Dataset . 2018 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Proceedings of Inter... arrow_drop_down Proceedings of International Structural Engineering and ConstructionArticle . Dataset . 2018 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2014 EnglishPublisher:PANGAEA Funded by:EC | ERA-CLIMEC| ERA-CLIMPANGAEA - Data Publi... arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2014License: CC BY NCData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1594/pangaea.822240&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!visibility 2visibility views 2 Powered bymore_vert PANGAEA - Data Publi... arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2014License: CC BY NCData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2013Embargo end date: 12 Apr 2013 EnglishPublisher:Dryad Authors: Holland, Steven M.; Christie, Max;Holland, Steven M.; Christie, Max;doi: 10.5061/dryad.1779g
Models presented here of shallow-marine siliciclastic deposition show that the widths of depth-defined regions differ markedly in response to sea-level change. These models add to recent studies that have emphasized the highly specific response of habitat area to sea-level change. Collectively, these studies indicate that a particular bathymetric zone on a particular margin may vary substantially in area during a sea-level change, while other such zones and margins may experience little or even opposite responses. In the models presented here, intermediate- depth and deep-water regions tend to show sinusoidal variations in width, with widening during relative falls in sea level and narrowing during relative rises. The shallow-water region displays markedly non-sinusoidal change and is consistently characterized by abrupt widening at the beginning of the highstand systems tract and an equally abrupt narrowing at the onset of sea-level fall at the beginning of the falling-stage systems tract. These onshore-offshore differences in how width and area change with sea level may explain why taxa in shallow- water settings tend to be more abundant, eurytopic, and widespread than those in deeper-water settings. Likewise, these models suggest that the evolution of novelty in nearshore habitats may be a response to wide variation in shallow-marine area during sea-level change. R and Matlab code for Holland and Christie 2013Contains R and Matlab functions for simulating and measuring the changes in the width of depth-defined zones during changes in sea levelHollandChristieSupplementaryMaterials.rtf
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!visibility 19visibility views 19 download downloads 2 Powered bymore_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Collection , Dataset 2003 EnglishPublisher:PANGAEA Authors: Maruyama, Toshiaki; Shiono, Masamichi;Maruyama, Toshiaki; Shiono, Masamichi;Late Neogene biostratigraphy of diatoms has been investigated from two sites occupied during Ocean Drilling Program (ODP) Leg 186 off the coast of northeast Japan. A unique aspect of ODP Leg 186 was the installation of two permanent borehole geophysical observatories at the deep-sea terrace along the Japan Trench. The Neogene subsidence history of the forearc was documented from both Sites 1150 and 1151, and Quaternary to middle Miocene (16 Ma) sediments represent a nearly continuous stratigraphic sequence including numerous ash records, especially during the past 9 m.y. Diatoms are found in most samples in variable abundance and in a moderately well preserved state throughout the sequence. The assemblages are characterized consistently by age-diagnostic species of Denticulopsis and Neodenticula found in regions of high surface water productivity typical of middle to high latitudes. The Neogene North Pacific diatom zonation divides the Miocene to Quaternary sequences fundamentally well, except that the latest Miocene through early Pliocene Thalassiosira oestrupii Subzone is not applicable. Miocene and late Pliocene through Pleistocene diatom datum levels that have been proven to be of great stratigraphic utility in the North Pacific Ocean appear to be nearly isochronous within the level of resolution constrained by core catcher sample spacing. The taxonomy and stratigraphy of previously described species determined to be useful across the Miocene/Pliocene boundary have been investigated on the basis of the evolutionary changes within the Thalassiosira trifulta group. The biostratigraphically important forms belonging to the genus Thalassiosira have been illustrated with scanning electron micrographs. Supplement to: Maruyama, Toshiaki; Shiono, Masamichi (2003): Middle Miocene to Pleistocene diatom biostratigraphy of the Northwest Pacific at Sites 1150 and 1151. In: Suyehiro, K; Sacks, IS; Acton, GD; Oda, M (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 186, 1-38
PANGAEA - Data Publi... arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceCollection . 2003License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert PANGAEA - Data Publi... arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceCollection . 2003License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Collection , Dataset 1982 EnglishPublisher:PANGAEA Authors: Papavassiliou, C T; Cosgrove, M E;Papavassiliou, C T; Cosgrove, M E;Detailed major- and trace-element chemistry is presented for 41 sediment samples from DSDP Site-223 borehole cores. A marked change in chemical (and mineralogical) character is shown at the end of the Early Miocene Epoch which relates to tectonic events and associated changes in sedimentary regime. Enrichment in the contents of such elements as Mg, Cr and Ni compared with average values for fine-grained sediments occurs throughout the sequence and is particularly marked in the upper group of samples. A basic-ultrabasic provenance is suggested - the Oman ophiolites.Leaching with combined acid-reducing agent indicated typical lithogenous-character ordering for the elements and emphasised the enrichment of Mg, Cr, Ni (and Li, Cu, Zn, Pb, Fe and Ti) over values for near-shore muds and terrigenous material.Factor analysis on the bulk chemical data identifies the main lithogenous and biogenous components, subdividing the latter. It separates the upper and lower group of chemically dissimilar sediments and delineates a Mn-hydroxide phase. It also shows the essentially independent roles of Na, Ba and P. Supplement to: Papavassiliou, C T; Cosgrove, M E (1982): The geochemistry of DSDP sediments from Site 223, Indian Ocean. Chemical Geology, 37(3-4), 299-315
PANGAEA arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceCollection . 1982License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert PANGAEA arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceCollection . 1982License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Collection , Dataset 2021Publisher:Geological Society of London Authors: Cone, Dylan; Kopylova, Maya;Cone, Dylan; Kopylova, Maya;Low-Cr and high-Cr clinopyroxene, garnet, olivine, and ilmenite megacrysts from the Muskox kimberlite (Canada) were analyzed for major and trace elements, as well as Sr, Nd, and Pb isotopes. Samples display compositional overlap with respective phases in websterites, while clinopyroxene isotope systematics reveal similarities with both websteritic and metasomatic clinopyroxene in peridotites from the same kimberlite, in addition to Muskox and Jericho kimberlites. All lithologies may represent the products of mixing between EM1 mantle, relic Proterozoic enriched mantle and HIMU carbonatitic fluid. Equilibrium melts calculated from clinopyroxene trace element data using experimental distribution coefficients for feasible proto kimberlitic melts yield a range of metasomatic agents. Conclusion on the carbonate bearing nature of the metasomatism is based on the presence of a HIMU isotopic signature and results obtained from thermodynamic modeling using the Deep Earth Water model. Modelling was carried out with three fluid compositions; asthenospheric, eclogitic and kimberlitic. Our results suggest mineral compositions analogous to megacrysts cannot be produced by metasomatism of mantle peridotite by carbonate-free hydrous fluids. Isotope systematics argue against a strictly cognate relationship between megacrysts and their host kimberlite, instead suggesting megacrysts and websterites may represent products of regional metasomatism by carbonatitic HIMU fluids shortly predating kimberlite magmatism.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2011 EnglishPublisher:PANGAEA Authors: Borges, Alberto Vieira;Borges, Alberto Vieira;Cruise QC flag: D (see further details). The Fair Data Use Statement for SOCAT can be found at hdl:10013/epic.48576.d001
PANGAEA - Data Publi... arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2011License: CC BYData sources: DatacitePANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2014License: CC BYData sources: DatacitePANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2016License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert PANGAEA - Data Publi... arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2011License: CC BYData sources: DatacitePANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2014License: CC BYData sources: DatacitePANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2016License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Collection , Dataset 2017 EnglishPublisher:PANGAEA Funded by:NSF | U.S. - Thailand Collabora...NSF| U.S. - Thailand Collaboration: Geologic Records of Tropical Cyclone Strikes on the Gulf of Thailand Coast.Authors: Williams, Harry; Choowong, Montri; Phantuwongraj, Sumet; Surakietchai, Peerasit; +3 AuthorsWilliams, Harry; Choowong, Montri; Phantuwongraj, Sumet; Surakietchai, Peerasit; Thongkhao, Thanakrit; Kongsen, Stapana; Simon, Eric;Washover sedimentation resulting from modern typhoon strikes on the Gulf of Thailand coast forms anomalous sand layers in low-energy coastal environments including marshes, ponds and swales. The primary diagnostic for recognizing prehistoric typhoon-deposited sand layers in the geologic record are sharp upper and lower contacts between coarser-grained transported sand layers and finer-grained in-situ sediments. In this first paleotempestology study in Thailand, cores from two low-energy settings on the Gulf of Thailand coast - a coastal marsh near Cha-am and beach ridge plain swales near Kui Buri - reveal geologic evidence of up to 19 typhoon strikes within the last 8000 years. The sand layers have sharp upper and lower contacts with enclosing finer sediments. Some sand layers also contain other evidence of a sudden powerful landward-directed surge of ocean water, including gravel-sized clasts, offshore foraminifera, abundant shell fragments, plant debris and mud rip-up clasts. Sand layers record eleven typhoon strikes at Cha-am, ranging in age from AD 1952 to 7575 cal. yr. BP, and eight typhoon strikes at Kui Buri, ranging in age from 4075 to 7740 cal. yr. BP. Bayesian age?depth models, derived from eight AMS radiocarbon dates, suggest that the frequency of typhoon strikes was 2-5 times greater from 3900 to 7800 cal. yr. BP compared to 0-3900 cal. yr. BP. Possible explanations for this variability in the typhoon record are that typhoons were more frequent and/or more intense in Southeast Asia in the mid-Holocene because of climatic changes associated with the Mid-Holocene Warm Period or that the record reflects site sensitivity changes resulting from a mid-Holocene sea-level highstand. The preliminary finding of a possible link between warmer conditions and a greater frequency of intense typhoon strikes could have important societal implications, given possible consequences of ongoing global warming. Supplement to: Williams, Harry; Choowong, Montri; Phantuwongraj, Sumet; Surakietchai, Peerasit; Thongkhao, Thanakrit; Kongsen, Stapana; Simon, Eric (2016): Geologic records of Holocene typhoon strikes on the Gulf of Thailand coast. Marine Geology, 372, 66-78
PANGAEA arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceCollection . 2017License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert PANGAEA arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceCollection . 2017License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2017 EnglishPublisher:PANGAEA Authors: Rehder, Gregor; Glockzin, Michael;Rehder, Gregor; Glockzin, Michael;Cruise QC flag: E (see further details).
PANGAEA arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2017License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert PANGAEA arrow_drop_down PANGAEA - Data Publisher for Earth and Environmental ScienceDataset . 2017License: CC BYData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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