Results 61 to 70 of about 215,212 (170)
Papers in Palaeontology, Volume 10, Issue 1, January/February 2024.Abstract An unusually rich and diverse suite of virgianid brachiopods, hitherto poorly known, is systematically described here for the first time from the Ordovician–Silurian boundary interval (late Katian – Aeronian) of North Greenland. The Late Ordovician virgianids comprise typical taxa of the warm‐water Tcherskidium fauna (e.g.
Jisuo Jin +3 more
wiley +1 more source
Physical Aspects of the Space-Time Torsion [PDF]
Phys.Rept.357:113,2002, 2001 We review many quantum aspects of torsion theory and discuss the possibility of the space-time torsion to exist and to be detected. The paper starts, in Chapter 2, with an introduction to the classical gravity with torsion, that includes also interaction of torsion with matter fields. In Chapter 3, the renormalization of quantum theory of matter fields
arxiv +1 more source
Optically Levitated Nanodumbbell Torsion Balance and GHz Nanomechanical Rotor. [PDF]
Physical Review Letters, 2018 Levitated optomechanics has great potential in precision measurements, thermodynamics, macroscopic quantum mechanics, and quantum sensing. Here we synthesize and optically levitate silica nanodumbbells in high vacuum.
Jonghoon Ahn +7 more
semanticscholar +1 more source
Infant mortality across species. A global probe of congenital abnormalities [PDF]
, 2019 Infant mortality, by which we understand the postnatal stage during which mortality is declining, is a manifestation and embodiment of congenital abnormalities. Severe defects will translate into death occurring shortly after birth whereas slighter anomalies may contribute to death much later, possibly only in adult age.
arxiv +1 more source
Apical Sensory Organ in Larvae of the Patellogastropod Tectura scutum
The Biological Bulletin, 2002 The apical sensory organ in veliger larvae of a patellogastropod, a basal clade of gastropod molluscs, was studied using ultrastructural and immunohistochemical techniques.
L. Page
semanticscholar +1 more source
Beiträge zur Torsion und Frühevolution der Gastropoden
, 2009 Contributions to torsion and early evolution of the gastropods The phylogenetical model, which is presented here, is directed by trying to explain torsion of gastropods out of biomechanical conditions.
Von K. Edlinger
semanticscholar +1 more source
Surface growth kinematics via local curve evolution [PDF]
, 2011 A mathematical framework is developed to model the kinematics of surface growth for objects that can be generated by evolving a curve in space, such as seashells and horns.
Goriely, A., Moulton, D. E.
core +1 more source
Die Torsion der Gastropoda ‐ ein biomechanischer Prozeß
, 2009 The recently proposed biomechanical model of gastropod torsion (edlinger 1988 a, b) is rejected on various reasons. First, the assumed original conditions in Polyplacophora and Tryblidiida as well as the constructed original condition in the Gastropoda ...
Von G. Haszprunar
semanticscholar +1 more source
Larval Shell Muscles in the Abalone Haliotis kamtschatkana.
The Biological Bulletin, 1997 I used light and electron microscopy to investigate shell-attached muscles in larvae of Haliotis kamtschatkana Jonas, 1845, because an early description of these muscles in H.
L. Page
semanticscholar +1 more source
Biodiversity survey of marine Gastropoda of Helgoland [PDF]
Marine Gastropoda and their distribution around the island of Helgoland (North Sea) were studied at two different locations; the intertidal zone of the northeastern rocky shore and the so-called Tiefe Rinne, a depression situated on the edge of the ...
Keramopoulou, Myrto +1 more
core +1 more source