For 2D piston pump the churning torque of its cam guide rails at high speed is one main sources mechanical efficiency loss. To conveniently calculate and also provide guidance for future optimization reduction, an accurate analytical model constant acceleration deceleration rail assembly stacked-rollers established, where whole divided into peripheral torque, pushing flow end face torque. Then ...

The spin transfer phenomenon provides a new method to manipulate magnetization without applying an external magnetic field and a new playground to study the spin degree of freedom of electrons. Two types of magnetic dynamics excited by the spin transfer torque from a direct current were predicted in 1996: magnetization reversal and steady-state precession. The physics of spin-torque-induced mag...

The focus of this work is the initial value problem of the rotational rigid body dynamics. Often the calculation of forcing (evaluation of the external torques) is computationally intensive. For instance, in many molecular dynamics simulations, the evaluation of the forcing may take as much as 90% or more of the CPU time. Consequently, methods that limit the number of evaluations of the externa...

The anterior end or head of a devescovinid flagellate from termites continually rotates in a clockwise direction relative to the rest of the cell. Previous laser microbeam experiments showed that rotational motility is caused by a noncontractile axostyle complex which runs from the head through the cell body and generates torque along its length. We report here success in obtaining glycerinated...

Previous studies have reported persistent rotational behavior between adherent cell-cell pairs cultured on micropatterned substrates, and this rotation is often accompanied by a sigmoidal deflection of the cell-cell interface. Interestingly, the cell-cell rotation runs in the opposite reference frame from what could be expected of single cell locomotion. Specifically, the rotation of the cell p...

Aim: The purpose of this study is to evaluate the effect different torque settings ProTaper Next files on microcrack formation. Materials and methods: Ninety mandibular anterior teeth were used. Fifteen served as control 75 divided into three groups according (n=25). In group 1; root canals instrumented using at a rotational speed 300rpm 2.0 Ncm torque. 2; used with 3.5 torque, in 3; 5.2 Teeth ...

In this paper is proposed a dynamic torque, rotational speed, and shaft position sensor. It built of magnetic elastomer coating directly applied over rotating shaft. The sensor used for precise measurements changes in torque it usable at high speeds, on the device based material deformation corresponding change field amplitude direction. design simple can acquire reliable readings wide range sp...

The influence of spin waves on rapid rotational magnetization reversal (switching) in a thin ferromagnetic film is investigated by means of a semiclassical, continuum theory which includes external, anisotropy, exchange, and magnetostatic (dipolar) fields. To simplify the magnetostatic field, a "thin-film approximation" is introduced, in which the magnetization is replaced by its average over t...

Developing artificial neural network (ANN), a model to make a correct prediction of required force and torque in ring rolling process is developed for the first time. Moreover, an optimal state of process for specific range of input parameters is obtained using Genetic Algorithm (GA) and Particle Swarm Optimization (PSO) methods. Radii of main roll and mandrel, rotational speed of main roll, pr...

Rossander, M. 2017. Electromechanics of Vertical Axis Wind Turbines. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1581. 81 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-513-0117-4. Wind power is an established mean of clean energy production and the modern horizontal axis wind turbine has become a common sight. The need for maint...