Results 31 to 40 of about 306,363 (301)

The effect of contact time between alginate impression material and type III dental stone on the surface properties of stone casts

Journal of Baghdad College of Dentistry, 2021
Background: Alginate impression material is the irreversible hydrocolloid material that is widely used in dentistry. The contact time between alginate and gypsum cast could have a detrimental effect on the properties of the gypsum cast.
Suha F Dulaimi, Atyaf M Alnaser, Najwah Y Hameed   +2 more
doaj   +1 more source

Evaluating Spatial Resolution and Channel Capacity of Sparse Cylindrical Arrays for Massive MIMO

IEEE Access, 2017
How to design antenna arrays plays an important role in wireless communications, especially when there are hundreds of antennas. In massive multiple-input and multiple-output (MIMO), if the number of antennas and RF chains are increasing, the channel ...
Na Wu, Fangqi Zhu, Qilian Liang
doaj   +1 more source

Dynamics of collapsing and exploding Bose-Einstein condensed vortex state [PDF]

, 2002
Using the time-dependent mean-field Gross-Pitaevskii equation we study the dynamics of small repulsive Bose-Einstein condensed vortex states of ^{85}Rb atoms in a cylindrical trap with low angular momentum hbar L per atom (L
A. A. Svidzinsky, A. Aftalion, A. Eleftheriou, A. J. Leggett, A. J. Moerdijk, B. D. Esry, B. Jackson, C. C. Bradley, C. C. Bradley, C. Raman, D. G. Fried, D. L. Feder, D. L. Feder, E. A. Donley, E. Lundh, E. P. Gross, E. Timmermans, F. Dalfovo, F. Dalfovo, F. Dalfovo, G. M. Kavoulakis, G. P. Berman, H. Saito, H. Saito, H. Saito, J. J. García-Ripoll, J. L. Roberts, J. L. Roberts, J. M. Gerton, J. R. Abo-Shaeer, J. R. Abo-Shaeer, J. R. Ensher, J. Stenger, K. B. Davis, K. W. Madison, K. W. Madison, L. P. Pitaevskii, L. Santos, M. H. Anderson, M. Holland, M. Houbiers, M. R. Matthews, M. Tsubota, M. Ueda, P. A. Ruprecht, Ph. Courteille, R. A. Duine, R. Dum, R. J. Dodd, R. J. Marshall, S. Inouye, S. K. Adhikari, S. K. Adhikari, S. K. Adhikari, S. K. Adhikari, S. K. Adhikari, S. K. Adhikari, S. K. Adhikari, S. K. Adhikari, S. L. Cornish, Sadhan K. Adhikari, V. Vuletić, Y. Castin, Y. Kagan   +63 more
core   +2 more sources

STRAIGHTENING OF LOW-RIGID CYLINDRICAL DETAILS. PART 2. STRESSED STATE OF CYLINDRICAL BILLETS AT TRANSVERSE CHEESING BY FLAT PLATES

Izvestiya. Ferrous Metallurgy, 2019
To restore the shape of curved low-rigid cylindrical details such as shafts and axles, bending straightening under distributed loading is proposed, followed by hardening of the billet using surface plastic deformation based on transverse cheesing of it by flat plates.
S. A. Zaides, L. Kh. Kuang
openaire   +2 more sources

Overview of Battery Impedance Modeling Including Detailed State-of-the-Art Cylindrical 18650 Lithium-Ion Battery Cell Comparisons

Energies, 2022
Electrical models of battery cells are used in simulations to represent batteries’ behavior in various fields of research and development involving battery cells and systems. Electrical equivalent circuit models, either linear or nonlinear, are commonly used for this purpose and are presented in this article. Various commercially available cylindrical,
Julian Estaller, Anton Kersten, Manuel Kuder, Torbjörn Thiringer, Richard Eckerle, Thomas Weyh   +5 more
openaire   +2 more sources

Binary Cosmic Strings [PDF]

, 1995
The properties of cosmic strings have been investigated in detail for their implications in early-universe cosmology. Although many variations of the basic structure have been discovered, with implications for both the microscopic and macroscopic ...
A. S. Schwarz, A. S. Schwarz, A. Vilenkin, A. Vilenkin, A. Vilenkin, A. Vilenkin, A. Vilenkin, B. Carter, E. B. Bogomol'nyi, E. Witten, H. B. Nielson, Indranil Dasgupta, J. Preskill, M. G. Alford, M. G. Alford, Ryan Rohm, T. W. B. Kibble, T. W. B. Kibble, Ya. B. Zel'dovich   +18 more
core   +2 more sources

Detailed experimental and numerical analysis of a cylindrical cup deep drawing: Pros and cons of using solid-shell elements [PDF]

International Journal of Material Forming, 2017
The Swift test was originally proposed as a formability test to reproduce the conditions observed in deep drawing operations. This test consists on forming a cylindrical cup from a circular blank, using a flat bottom cylindrical punch and has been extensively studied using both analytical and numerical methods.
J. Coër, H. Laurent, M. C. Oliveira, P.-Y. Manach, L. F. Menezes   +4 more
openaire   +4 more sources

Numerical Study of Entropy Generation for Natural Convection in Cylindrical Cavities [PDF]

Journal of Heat and Mass Transfer Research, 2016
In this paper, an enhanced computational code was developed using finite-volume method for solving the incompressible natural convection flow within the cylindrical cavities.
Abdollah Rezvani, Mohammad Sadegh Valipour, Mojtaba Biglari   +2 more
doaj   +1 more source

Gravitational waves propagating into Friedmann--Robertson--Walker universes [PDF]

, 1996
We consider space-times with two isometries which represent gravitational waves with distinct wavefronts which propagate into exact Friedmann-Robertson-Walker (FRW) universes.
Bicak, Jiri, Griffiths, Jerry B.
core   +3 more sources

Solvable Examples of Drift and Diffusion of Ions in Non-uniform Electric Fields [PDF]

, 2008
The drift and diffusion of a cloud of ions in a fluid are distorted by an inhomogeneous electric field. If the electric field carries the center of the distribution in a straight line and the field configuration is suitably symmetric, the distortion can ...
G A Korn, J D Jackson, L G H Huxley, M Abramowitz, R N Cahn   +4 more
core   +3 more sources