Results 21 to 30 of about 236 (131)
Dataset of antiarch placoderms (the most basal jawed vertebrates) throughout Middle Paleozoic [PDF]
, 2022 Abstract. Antiarch placoderms, the most basal jawed vertebrates, have the potential to enlighten the origin of the last common ancestor of jawed vertebrates. Quantitative study based on credible data is more convincing than qualitative study. To reveal the antiarch distribution in space and time, we created a comprehensive structured dataset of ...
Zhaohui Pan +3 more
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Evidence for Placoderms from the Mid-Palaeozoic Sandon Beds of North-western New South Wales, Australia [PDF]
, 2023 Armoured jawed fishes known as placoderms are a well-documented group with a fossil record spanning the Silurian to end-Devonian. They have a global distribution and a marked diversity within Devonian deposits of Australia. Despite their notable Gondwanan
Bicknell, Russell D C +4 more
core +3 more sources
Devonian antiarch placoderms from Belgium revisited [PDF]
Acta Palaeontologica Polonica, 2015 ANR Program n° 2010 BLAN-607 “TERRES: Global perspectives on the terrestrialisation process”
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Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020 To improve the efficient and precise seeding of potatoes, a novel combination vacuum and spoon belt metering device was designed. The overall structure and working principle of vacuum and spoon belt metering devices were illustrated and analyzed.
Zhang Wanzhi +6 more
wiley +1 more source
Postfire Safety Investigation on Prestressed RPC Beams after Exposure to Elevated Temperatures
Advances in Materials Science and Engineering, Volume 2020, Issue 1, 2020., 2020 Since the postfire safety of prestressed RPC beams after exposure to elevated temperatures needs to be studied and proved, this paper prepares eight smart prestressed RPC beams with intelligent sensors built in to monitor the internal temperature, force, and strain. The residual bearing tests after fire are carried out. The failure process of the beams
Yan Kai +5 more
wiley +1 more source
Stability Mechanism and Repair Method of U‐Shaped Steel Reverse Arch Support in Soft Floor Roadway
Advances in Civil Engineering, Volume 2020, Issue 1, 2020., 2020 This paper is aimed at the inverted arch support instability of track roadway with mining level +1100 m in Liuyuanzi Coal Mine. By means of field investigation, theoretical analysis, numerical calculation, and engineering practice, the instability reasons of inverted arch structure are expounded, the mechanical mechanism of instability of inverted arch
Chao Wang +4 more
wiley +1 more source
Известия высших учебных заведений: Геология и разведка, 2016 The stratigraphie distribution and systematic composition of the Middle-Upper Devonian remains of antiarchs from the sediments of Central Kazakhstan are analyzed. Central Kazakhstan ichthyofauna contains mainly endemic taxons of antiarchs.
S. V. Moloshnikov
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Journal of Palaeogeography, 2020 Middle Palaeozoic vertebrate fossil occurrences are summarised for Australia, with reference to faunal connections between Asia and East Gondwana, as first indicated by fish distributions of Lower Devonian fossil sites. Major endemic groups discussed are
Gavin Charles Young, Jing Lu
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First articulated phyllolepid placoderm from North America, with comments on phyllolepid systematics [PDF]
, 2013 Copyright 2013 The Academy of Natural Sciences of Philadelphia. Published version of the paper reproduced here with permission from the publisher.The first articulated phyllolepid placoderm from North America (outside of Greenland) is described from the ...
Daeschler, EB, Long, John A
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Известия высших учебных заведений: Геология и разведка, 2019 Three stages, namely Middle Devonian (I), Early Late Devonian (II) and Late Late Devonian (III), are distin-guished in the evolution of antiarchs (Placodermi, Antiarchi) in the Middle-Late Devonian of Northern Eurasia.
S. V. Moloshnikov
doaj +1 more source