Results 21 to 30 of about 626,674 (391)

On the interaction of massive spinor particles with external electromagnetic and torsion fields [PDF]

open access: yes, 1998
We explore the Dirac equation in external electromagnetic and torsion fields. Motivated by the previous study of quantum field theory in an external torsion field, we include a nonminimal interaction of the spinor field with torsion.
Audretsch   +25 more
core   +2 more sources

The subjectivity of objective evaluation of torsion on fundus photographs by practicing strabismologists

open access: yesIndian Journal of Ophthalmology, 2018
Purpose: To assess the variability of assessing the ocular torsion on fundus photographs among strabismus surgeons. Methods: This was a prospective, noninterventional, clinical trial involving 16 trained and experienced squint surgeons participated in ...
Jitendra Jethani, Paaraj Dave
doaj   +1 more source

Axial torsion and gangrene of Meckel’s diverticulum: Case report [PDF]

open access: yesSrpski Arhiv za Celokupno Lekarstvo, 2015
Introduction. Meckel’s diverticulum (MD) is the most prevalent congenital anomaly of small intestine. It develops due to the incomplete obliteration of omphalomesenterict duct which normally undergoes obliteration during the seventh week of ...
Radović Saša V.   +3 more
doaj   +1 more source

Analytic torsion and Reidemeister torsion [PDF]

open access: yesProceedings of the National Academy of Sciences, 1977
We announce a proof of the conjecture of Ray and Singer that for a compact Riemannian manifold the analytic torsion and Reidemeister torsion are equal. The proof involves studying the heat equation for certain manifolds M, equipped with metrics g u , 0 < u
openaire   +3 more sources

Unusually thick shear-softening surface of micrometer-size metallic glasses

open access: yesThe Innovation, 2021
Summary: The surface of glass is crucial for understanding many fundamental processes in glassy solids. A common notion is that a glass surface is a thin layer with liquid-like atomic dynamics and a thickness of a few tens of nanometers.
J. Dong   +7 more
doaj  

Generalized Softened Variable Angle Truss Model for PC Beams under Torsion

open access: yesInternational Journal of Concrete Structures and Materials, 2018
In a previous study, a new model (Generalized Softened Variable Angle Truss Model—GSVATM) was proposed to compute the global behavior of reinforced concrete beams under torsion, including for low loading stages. In this article, the GSVATM is extended to
Luís F. A. Bernardo   +2 more
doaj   +1 more source

Differences in Femoral Torsion Among Various Measurement Methods Increase in Hips With Excessive Femoral Torsion

open access: yesClinical Orthopaedics and Related Research, 2019
Background Correct quantification of femoral torsion is crucial to diagnose torsional deformities, make an indication for surgical treatment, or plan the amount of correction.
F. Schmaranzer   +4 more
semanticscholar   +1 more source

Torsion without torsion

open access: yesPhysics Letters B, 1979
Abstract Modifying the Yang-Mills field strength and using a recently proposed generalisation of the usual minimal coupling procedure allows a simple but non-trivial type of dynamic torsion to couple to all gauge fields in a consistent manner. This allows, for the first time, a framework in which no spinning particle is required to be exempted from ...
W.A. Sayed, C. Mukku
openaire   +2 more sources

The Impact of Testicular Torsion on Testicular Function

open access: yesThe World Journal of Men's Health, 2019
Torsion of the spermatic cord is a urological emergency that must be treated with acute surgery. Possible long-term effects of torsion on testicular function are controversial.
F. M. Jacobsen   +6 more
semanticscholar   +1 more source

A Canonical Quadratic Form on the Determinant Line of a Flat Vector Bundle [PDF]

open access: yes, 2007
We introduce and study a canonical quadratic form, called the torsion quadratic form, of the determinant line of a flat vector bundle over a closed oriented odd-dimensional manifold.
Braverman, Maxim, Kappeler, Thomas
core   +2 more sources

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