Results 21 to 30 of about 2,089 (265)
Valanginian to Barremian Benthic Foraminifera from ODP Site 766 (Leg 123, Indian Ocean) [PDF]
, 1995 A Valanginian to Barremian bathyal foraminiferal assemblage (118 taxa belonging to 51 genera) is documented from ODP Site 766, drilled near the foot of the Exmouth Plateau off northwest Australia.
Holbourn, A.E.L., Kaminski, M.A.
core +1 more source
Iterating evolutes and involutes [PDF]
, 2016 This paper concerns iterations of two classical geometric constructions, the evolutes and involutes of plane curves, and their discretizations: evolutes and involutes of plane polygons.
Arnold, Maxim +4 more
core +2 more sources
A Reciprocal Transformation for the Constant Astigmatism Equation [PDF]
, 2014 We introduce a nonlocal transformation to generate exact solutions of the constant astigmatism equation $z_{yy} + (1/z)_{xx} + 2 = 0$. The transformation is related to the special case of the famous B\"acklund transformation of the sine-Gordon equation ...
Hlaváč, Adam, Marvan, Michal
core +3 more sources
High-order involute modified noncircular bevel gears
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2014 Noncircular bevel gears (NBGs) is a kind of spatial transmission mechanism which can be used to transmit the motion and power between two intersecting axes with a variable transmission ratio and according to a suitable motion program.
Jiqiang XIA, Kan SHI, Chunjie WANG
doaj +1 more source
A Review on Solar Concentrators with Multi-surface and Multi-element (MS/ME) Combinations [PDF]
, 2019 Solar concentrator always plays an important role in solar energy collection as it could enhance the energy density effectively. Various structures of solar concentrators have been researched in recent years, among which multi-surface (MS) and multi ...
Liu, Shuli, Ma, Xinglong, Zheng, Hongfei
core +1 more source
Foraminiferal assemblages from the bajocian global stratotype section and point (GSSP) at Cape Mondego (Portugal) [PDF]
, 2013 A detailed study of the benthic foraminiferal assemblages at the Bajocian Global Stratotype Section and Point (GSSP— Murtinheira section, Lusitanian Basin, western Portugal) presented herein increases the correlation potential of this relevant global ...
Canales Fernández, María Luisa +1 more
core +2 more sources
THE LOGARITHMIC SPIRAL AND ITS SPHERICAL COUNTERPART
Journal of Industrial Design and Engineering Graphics, 2020 Logarithmic spirals are isogonal trajectories of pencils of lines. From a series of geometric consequences, we pick out a few which are relevant for kinematics: When a logarithmic spiral rolls on a line, its asymptotic point traces a straight line. Hence,
Hellmuth Stachel +2 more
doaj +2 more sources
Slant helices in three dimensional lie groups
, 2012 In this paper, we define slant helices in three dimensional Lie Groups with a bi-invariant metric and obtain a characterization of slant helices. Moreover, we give some relations between slant helices and their involutes, spherical images.Comment: 15 ...
Ekmekci, N. +3 more
core +1 more source
Early to middle Miocene foraminifera from the deep-sea Congo Fan, offshore Angola [PDF]
, 2008 Analysis of a 630m section of an exploration well penetrating the distal part of the Congo Fan (~2000m water depth) yielded high abundance and diversity assemblages of agglutinated and calcareous benthic foraminifera.
Jones, R.W., Kaminski, M. A., Kender, S.
core
Tau acetylation at K331 has limited impact on tau pathology in vivo
FEBS Letters, EarlyView.We mapped tau post‐translational modifications in humanized MAPT knock‐in mice and in amyloid‐bearing double knock‐in mice. Acetylation within the repeat domain, particularly around K331, showed modest increases under amyloid pathology. To test functional relevance, we generated MAPTK331Q knock‐in mice.
Shoko Hashimoto +3 more
wiley +1 more source