Results 31 to 40 of about 1,005,297 (298)

Stick and Slip Behaviour of Confined Oligomer Melts under Shear. A Molecular-Dynamics Study. [PDF]

, 1993
The flow behaviour of melts of short chains, confined in molecularly thin Couette flow geometries, is studied with molecular-dynamics simulations. The effect of wall attraction and confinement on the density and velocity profiles is analysed.
Bitsanis, I.,, Brinke, G. ten,, Hadziioannou, G.,, Manias, E.,   +3 more
core   +2 more sources

Self-gravitating domain walls and the thin-wall limit

, 2002
We analyse the distributional thin wall limit of self gravitating scalar field configurations representing thick domain wall geometries. We show that thick wall solutions can be generated by appropiate scaling of the thin wall ones, and obtain an exact ...
A. Vilenkin, A. Wang, Alejandra Melfo, F. Bonjour, F. Brito, G. Goetz, J. Ipser, J. Maldacena, K. Skenderis, L. Randall, M. Cvetic, M. Cvetic, M. Gremm, M. Mukherjee, Nelson Pantoja, O. DeWolfe, P.K. Townsend, R. Gass, R. Geroch, Rommel Guerrero, W. Boucher, W. Israel   +21 more
core   +1 more source

Can Cosmic Ray Catalysed Vacuum Decay Dominate Over Tunnelling? [PDF]

, 1997
We consider the question of whether cosmic ray catalysed false vacuum decay can be phenomenologically more important than spontaneous decay via quantum tunnelling.
Carena, Casas, Coleman, Coleman, Duncan, Eichten, Ellis, Flores, Georgi, Honda, Hung, Hut, John McDonald, Kari Enqvist, Kolb, Kusenko, Landau, Landau, Linde, Lindner, Politzer, Rubakov, Sher, Voloshin, Voloshin   +24 more
core   +2 more sources

The Thin-Wall Approximation in Vacuum Decay: a Lemma

, 2018
The 'thin-wall approximation' gives a simple estimate of the decay rate of an unstable quantum field. Unfortunately, the approximation is uncontrolled.
Brown, Adam R.
core   +1 more source

Micromilling of Ti-6Al-4V alloy for high-aspect-ratio thin walls and dimensional error compensation based on an online compensation system [PDF]

Mechanical Sciences
The requirements of fabrication quality of high-aspect-ratio (HAR) thin walls made of titanium alloy are increasing in various engineering fields. However, there is a lack of studies investigating the fabrication of HAR thin walls with high-dimensional ...
Y. Li, X. Cheng
doaj   +1 more source

Design guidelines for suppressing distortion and buckling in metallic thin-wall structures built by powder-bed fusion additive manufacturing

Materials & Design, 2022
Controlling distortion in laser powder-bed fusion additive manufacturing is of critical importance especially for thin-wall structures, which typically experience significant deformation and buckling during the build process.
G. Vastola, W.J. Sin, C.-N. Sun, N. Sridhar   +3 more
doaj   +1 more source

Bubble formation in $\phi^6$ potential

, 2008
Scalar field theory with an asymmetric potential is studied at zero temperature and high-temperature for $\phi^6$ potential. The equations of motion are solved numerically to obtain O(4) spherical symmetric and O(3) cylindrical symmetric bounce solutions.
Arnold D., Bergner L.M., Bödeker L., Coleman V., Digal S., Flores R.O., Grojean G., Ham S.K., Hatem Widyan, Joy V.C., Kim K.-i., Münster S., Widyan A.   +12 more
core   +1 more source

As-cast microstructure characteristics of K439B nickel-based superalloy thin- walled castings of different thickness

Cailiao gongcheng
K439B is a new type of nickel-based superalloy with a service temperature up to 800 ℃. In the face of the demand for mass reduction of aircraft， the structure of its components is developing in the direction of thin-wall.
ZHOU Depeng, SUI Dashan, MA Jinyuan, GUI Daxing, DONG Anping, SUN Baode   +5 more
doaj   +1 more source

Electric signature of magnetic domain-wall dynamics [PDF]

, 2011
We study current-induced domain-wall dynamics in a thin ferromagnetic nanowire. The domain-wall dynamics is described by simple equations with four parameters.
Abanov, Ar., Liu, Y., Tretiakov, Oleg A.
core   +2 more sources

Mycobacterial cell division arrest and smooth‐to‐rough envelope transition using CRISPRi‐mediated genetic repression systems

FEBS Open Bio, EarlyView.
CRISPRI‐mediated gene silencing and phenotypic exploration in nontuberculous mycobacteria. In this Research Protocol, we describe approaches to control, monitor, and quantitatively assess CRISPRI‐mediated gene silencing in M. smegmatis and M. abscessus model organisms.
Vanessa Point, Wafaa Achache, Janïs Laudouze, Eliana Sepulveda Ramos, Mickaël Maziero, Céline Crauste, Stéphane Canaan, Pierre Santucci   +7 more
wiley   +1 more source