Large twist-angle grain boundaries in layered structures are often described by Scherk’s first surface whereas small twist-angle grain boundaries are usually described in terms of an array of screw dislocations. We show that there is no essential distinction between these two descriptions and that, in particular, their comparative energetics depends crucially on the core structure of their scre...

Measurements of the forward-angle differential cross section for elastic electron-proton scattering were made in the range of momentum transfer from Q2 = 2.9 to 31.3 (GeV/c)2 using an electron beam at the Stanford Linear Accelerator Center. The data span six orders of magnitude in cross section. Combined statistical and systematic uncertainties in the cross section measurements ranged from 3.6%...

This paper deals with the problem of non-uniform torsion in thin-walled elastic beams with asymmetric cross-section, removing the basic concept of a fixed center of twist, necessary in the Vlasov’s and Benscoter’s theories to obtain a warping stress field equivalent to zero. In this new torsion/flexure theory, despite of the classical ones, the warping function will punctually satisfy the first...

Denavit Hartenberg (D-H) Kinematic structure representation of robot having revolute joint normally have fix arm length a, offset distance d, twist angle α and only varied joint angle θ. This paper introduce two (2) inputs variable of twist angle α and joint variable θ besides fix value of arm length a and offset distance d. Variable value of α and θ are dependent on polar electromagnetic actua...

A simulation model and a rigid body model are used to investigate twisting initiated during the take-off or contact phase. It is shown that it is possible to produce a full twist solely by building up angular momentum in the arms during the contact phase. This method is only half as effective as building up momentum in the whole body during contact. The introduction of twist into a somersault c...

Non-scaling, non-factorizing 1 Q2 I contributions to cross sections are derived for semi-inclusive deep-inelastic scattering, RN+ R'?TX. These higher twist terms are dominant at large z=p; pN /Q l pN. They provide unusual (l-y) terms in the cross section, as well as asymmetries in the azimuthal angle dependence. Calculations are also presented for the quark to pion fragmentation function (Submi...

Abstract The influence of part geometry on twist springback was studied by a A-pillar inner plate. structural parameters divided into cross-section and longitudinal axis, the response surface model established to analyze influences various springback. results show that straight line 1, 3, angle 2 4 cross section have significant effect In addition, increases continuously with increasing total l...

A powerful method for liquid crystal ~LC! cell twist angle and retardation measurement is presented. This method is based on the spectroscopic ellipsometry. By varying the polarizer and analyzer angles only, a transmission spectrum containing null transmission at some particular wavelengths can be obtained. Analytical equations derived bases on a polarization analysis of twisted birefringent la...