Results 141 to 150 of about 479,276 (195)

Pentagon‐Embedded Cycloarylenes with Cylindrical Shapes

Angewandte Chemie International Edition, 2017
AbstractCylinder‐shaped graphitic networks in carbon nanotubes have attracted interest from scientists in various disciplines. The chemical synthesis of segments thereof is considered as a challenging and appealing subject in chemistry, and deepens our understanding of curved and conjugated arrays of hexagons. We herein report the synthesis of cylinder‐
Shunpei Hitosugi, Sota Sato, Taisuke Matsuno, Takashi Koretsune, Ryotaro Arita, Hiroyuki Isobe   +5 more
openaire   +2 more sources

Parametric dog-bone-shaped tunable cylindrical fluidic lens

Applied Optics, 2021
Tunable spherical fluidic lenses are among the most essential components in adaptive optics. However, fabricating cylindrical tunable lenses has proven more challenging, mainly due to the difficulty in eliminating the defocus component. We demonstrate a parametric approach to minimize the defocus in cylindrical tunable fluidic lenses.
Erol Ozgur, Daniel Reetz, Farhad Akhoundi, Nicholas O’Brien, Jaclyn Wycoff, Ram Voorakaranam, Pierre-Alexandre Blanche, Lloyd LaComb, Chen Liang, Gholam Peyman, N. Peyghambarian   +10 more
openaire   +2 more sources

Shape factors of cylindrical permeameters

Geomechanics and Engineering, 2011
This paper presents an analytical solution for steady state flow into a close-ended cylindrical permeameter. The soil medium is considered to be uniform, isotropic, and of infinite thickness. Laplace equation is solved by considering rotational symmetry and by using curvilinear coordinates obtained from conformal mapping.
Vincenzo Silvestri, Ghassan Abou Samra, Christian Bravo-Jonard   +2 more
openaire   +1 more source

Shape factors of cylindrical piezometers

Géotechnique, 1980
This Paper describes a liquid electric analogue model and a finite difference model used to establish reliable values for the shape factors of cylindrical piezometers with length/diameter ratios of up to 15. For piezometers with length/diameter ratios greater than 4, it was found that the shape factor is given with negligible error by the relationship:
E. W Brand, J. Premchitt
openaire   +1 more source

Statistics of Shape, Direction and Cylindrical Variables

Journal of Applied Statistics, 2004
In statistical shape analysis, the shape of an object is understood to be what remains after the effects of location, scale and rotation are removed. We consider the distributional problem of triangular shape and an associated direction; motivated by a data set of microscopic fossils.
Mardia, Kanti V., Kirkbride, J, Bookstein, Fred   +2 more
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Shape Factors of Cylindrical Piezometers in Uniform Soil

Groundwater, 2011
This article presents the analytical solution of Laplace equation for the steady flow around open‐ended cylindrical piezometers located in an infinite, isotropic, and incompressible saturated soil. Shape factors are obtained for piezometers with varying length‐to‐diameter ratios.
Vincenzo, Silvestri, Ghassan, Abou-Samra, Christian, Bravo-Jonard   +2 more
openaire   +2 more sources

Shape selective adsorption in cylindrical pores

Chemical Engineering Science, 2000
Grand canonical Monte Carlo simulations are performed to examine shape selectivity. A binary mixture of differently shaped isomers similar to m- and p-xylene is equilibrated in smooth cylindrical pores. Shape selectivity for the symmetric adsorbate improves non-monotonically with decreasing pore size.
S Mohanty, H.T Davis, A.V McCormick
openaire   +1 more source

EXPLOSION WELDING OF CYLINDRICAL SHAPES

1969
Abstract : A number of papers have been published in the open literature on the explosion welding of concentric cylinders and on the joining of tubes to tube plates. The paper attempts to provide a concise review of these contributions by discussing work performed by the authors and other investigators.
null Winston W., Cavell James F., Kowalick Harry J., Jr. Addison   +3 more
openaire   +1 more source

Shape factor for non-cylindrical nanowires

Physica B: Condensed Matter, 2008
The concept of shape factor, originally for non-spherical nanoparticles, has been generalized to nanowires with non-cylindrical shapes. The new shape factor is defined as the total exterior area ratio of nanowires between non-cylindrical and cylindrical shapes in identical volumes, which equals one for cylindrical shapes and is larger than one for non ...
W.H. Qi, B.Y. Huang, M.P. Wang, Z.M. Yin, J. Li   +4 more
openaire   +1 more source

Ventricular Shape: Spherical or Cylindrical?

1998
It has been a long time since Harvey, in 1628, understood that blood flows in a circle. Actually, he only postulated the capillaries (18). Concerning the forces that support flow, he only allowed the vis a tergo without the vis a fronte. It was only 200 years later (in 1843) that Purkinje understood both these last-mentioned forces and recognized the ...
Susara C. J. E. Juznic, Gojmir Juznic, Bojan Knap   +2 more
openaire   +1 more source