Results 31 to 40 of about 8,221,958 (294)
On the scattering of torsional elastic waves from axisymmetric defects in coated pipes [PDF]
, 2012 This is the post-print version of the Article - Copyright @ 2012 ElsevierLong range ultrasonic testing is now a well established method for examining in-service degradation in pipelines.
Mudge, P, Zlatev, Z, Kirby, R
core +1 more source
Energy Reports, 2021 In the present study, a 3D FEM of compound percussive system considering a loading–unloading cycle was employed to simulate the dynamic single-cutter-rock interaction.
Yumei Li +4 more
doaj +1 more source
Development and Field Test of the Same-Frequency Different-Phase Compound Impact Tool
Shiyou jixie, 2023 A same-frequency different-phase compound impact tool was developed to improve the rock-breaking efficiency of PDC bits in hard formations, increase the penetration depth of cutters, and eliminate the “stick-slip” phenomenon of the downhole bit.The ...
Ye Daohui +5 more
doaj
Torsional ultrasound mode versus combined torsional and conventional ultrasound mode phacoemulsification for eyes with hard cataract [PDF]
, 2011 Mohamed A Fakhry1,2, Malak I El Shazly11Department of Ophthalmology, Kasr El Aini Hospital, Cairo University, Cairo, Egypt; 2Cataract and Refractive Consultant, International Eye Hospital, Cairo, EgyptPurpose: To compare torsional versus combined ...
El Shazly MI, Mohamed Fakhry, Fakhry MA
core +1 more source
Applied Sciences, 2022 The precision rotary vector reducer with involute variable tooth thickness (PRVT) is a high-performance precision transmission device, which is very suitable for aerospace, medical machinery, industrial robots, automation equipment, and other fields, and
Le Chang +5 more
doaj +1 more source
Oligothiophene wires: impact of torsional conformation on the electronic structure
Physical Chemistry Chemical Physics, 2016 Different torsional conformations of alkyl-substituted oligothiophenes show nearly identical progressions of particle-in-a-box-like electronic orbitals.
D A, Kislitsyn +7 more
openaire +3 more sources
FEBS Letters, EarlyView.Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure +3 more
wiley +1 more source
Shiyou jixie, 2023 Previous researches on rock-breaking efficiency under compound impact neglect the effects of the phase difference between axial and torsional impact loads.Therefor,such effects were discussed.The single-cutter rock-breaking numerical model of PDC bit ...
Xi Yan +5 more
doaj
The Stress Singularity in a Stepped Bar Under Impact Torsion
JSME international journal. Ser. 1, Solid mechanics, strength of materials, 1989 An impact torsion problem for a steppedbar composed of two semi-infinite bars bonded completely at each end is investigated. A stress singularity occurs at the corner of the bars. Therefore the stress analysis proceeds considering this stress singularity by making use of the series expansion technique, and the problems are reduced to an infinite set of
TSUJI, Tomoaki +3 more
openaire +3 more sources
FEBS Letters, EarlyView.Vacuolar H+‐ATPase (V‐ATPase) is a multisubunit rotary proton pump that acidifies intracellular compartments. Using elastic network models, we identified conserved hinge residues that govern its large‐scale functional motions. We show that intrinsically encoded ‘soft modes’ drive critical functional transitions, including rotary catalysis and ...
Diksha Parwana +3 more
wiley +1 more source