Results 41 to 50 of about 5,400,490 (233)

A methodology for analysis of defective pipeline by introducing stress concentration factor into beam-pipe finite element formulation

open access: yesActa Scientiarum: Technology, 2016
This work proposes a methodology for defective pipe elastoplastic analysis using the Euler Bernoulli beam-pipe element formulation. The virtual work equation is modified to incorporate the stress concentration factor in beam-pipe element formulation. The
Hsu Yang Shang
doaj   +1 more source

Effect of Scroll Pin Profile and Tool Rotational Speed on Mechanical Properties of Submerged Friction Stir Processed AZ31B Magnesium Alloy [PDF]

open access: yesMaterials Research, 2018
In this study, an effort has been made to choose an appropriate tool pin profile and rotational speed for a tool using a submerged friction stir processed hot rolled AZ31B magnesium alloy.
Sankar Ramaiyan   +2 more
doaj   +2 more sources

Localized D-dimensional global k-defects

open access: yes, 2011
We explicitly demonstrate the existence of static global defect solutions of arbitrary dimensionality whose energy does not diverge at spatial infinity, by considering maximally symmetric solutions described by an action with non-standard kinetic terms ...
A. Achúcarro   +54 more
core   +1 more source

Synthesis and characterization of polymerizable MOFs for the preparation of MOF/polymer mixed matrix membranes

open access: yesSTAR Protocols, 2022
Summary: Mixed-matrix membranes (MMMs) comprising polymer matrices and metal-organic frameworks (MOFs) provide efficient and economic CO2 separation.
Ziman Chen   +4 more
doaj   +1 more source

Cosmological Imprints of Pre-Inflationary Particles

open access: yes, 2009
We study some of the cosmological imprints of pre-inflationary particles. We show that each such particle provides a seed for a spherically symmetric cosmic defect.
  +25 more
core   +1 more source

Instabilities in a staircase stratified shear flow [PDF]

open access: yes, 2018
We study stratified shear flow instability where the density profile takes the form of a staircase of interfaces separating uniform layers. Internal gravity waves riding on density interfaces can resonantly interact due to a background shear flow ...
G. Ponetti   +5 more
core   +2 more sources

A Rapid and Accurate Technique With Updating Strategy for Surface Defect Inspection of Pipelines

open access: yesIEEE Access, 2021
Defect inspection in pipes at the early stage is of crucial importance to maintain the ongoing safety and suitability of the equipment before it presents an unacceptable risk. Due to the nature of detection methods being costly or complex, the efficiency
Yihui Da   +3 more
doaj   +1 more source

Spina Bifida Myelomeningocele: The Brain and Neuropsychological Outcomes [PDF]

open access: yesКлиническая и специальная психология, 2020
This paper reviews the physical, neural, and cognitive phenotypes of spina bifida myelomeningocele (SBM), a non-lethal neural tube defect that is the most common congenital birth defect affecting the central nervous system.
Fletcher J.M., Juranek J.
doaj   +1 more source

Retrograde closure of perimembranous ventricular septal defects. A paradigm shift

open access: yesREC: Interventional Cardiology (English Ed.), 2023
To the Editor, The percutaneous closure of ventricular septal defect (VSD) is still not widely used today due to its potential complications (atrioventricular block, valvular heart disease, hemolysis), and technical limitations, particularly, in low ...
Alejandro Rasines Rodríguez   +5 more
doaj   +1 more source

Effect of defects on thermal denaturation of DNA Oligomers

open access: yes, 2001
The effect of defects on the melting profile of short heterogeneous DNA chains are calculated using the Peyrard-Bishop Hamiltonian. The on-site potential on a defect site is represented by a potential which has only the short-range repulsion and the flat
A. Bonincontro   +15 more
core   +2 more sources

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