The controllability function method

The paper is devoted to the control problem for the movement of an overhead crane with the use of a dynamic model in the form of "trolley - cargo" mechanical system and the driving force as a control parameter. To solve the system of differential equations, which describe the movement of the system taking into account constraints for the control, the controllability function method is applied. The algorithm for solving the problem is described, a program is developed as well as difficulties, which occur while implementing the method, and ways of its solution are marked. Results of constructing the control and system trajectories are also provided as an example of the program work

Ways of considering thickness metal on indicators coercive force

The article is devoted to the existing methods of solving the problem of under-performance coercive force obtained by Structuroscopes type KРM-ЦК-2M, with increasing thickness of the metal elements controlled. Conclusions on the basis of research and planned future research direction

The method of reducing the intensity of magnetic field outside high voltage power substations

This work looks at theoretical methods for reducing the magnetic field generated outside the area of high voltage power substations. It has been shown that changing the construction of busbar wires is an effective measure that facilitates a reduction in the intensity of electromagnetic fields generated inside and outside the area of a substation. The measures connected with the phase sequence alternating of busbar wires can be implemented at the design stage and do not require an additional cost for implementation.В данной работе рассматриваются теоретические методы уменьшения магнитного поля за пределами подстанций высокого напряжения. Было показано, что чередование фаз проводов соседних ошиновок влияет на снижение интенсивности магнитного поля за пределами подстанций высокого напряжения, и эти меры могут быть реализованы на стадии проектных работ, не требуя дополнительных затрат для их реализации

Remaining life definition of crane metal construction on value of coercive forces

In this work, the condition definition of bridge crane metal construction and prognostication of its remaining life on the basis of nondestructive control method by using coercive forces is presented. Basic approaches and performance stages of the magnetic control for the purpose of metal condition definition and remaining life of its work are considere

Compensation of B-L charge of matter with relic sneutrinos

We consider massless gauge boson connected to B-L charge with and without compensation to complete the investigation of the gauging of B and L charges. Relic sneutrinos predicted by SUSY and composite models may compensate B-L charge of matter. As a consequence of the possible compensation mechanism we have shown that the available experimental data admit the range of the B-L interaction constant, 10^{-29} < {\alpha}_{B-L} < 10^{-12}, in addition to {\alpha}_{B-L} < 10^{-49} obtained without compensation.Comment: 6 page

Neutrino wave function and oscillation suppression

We consider a thought experiment, in which a neutrino is produced by an electron on a nucleus in a crystal. The wave function of the oscillating neutrino is calculated assuming that the electron is described by a wave packet. If the electron is relativistic and the spatial size of its wave packet is much larger than the size of the crystal cell, then the wave packet of the produced neutrino has essentially the same size as the wave packet of the electron. We investigate the suppression of neutrino oscillations at large distances caused by two mechanisms: 1) spatial separation of wave packets corresponding to different neutrino masses; 2) neutrino energy dispersion for given neutrino mass eigenstates. We resolve contributions of these two mechanisms.Comment: 7 page

`c' is the speed of light, isn't it?

Theories proposing a varying speed of light have recently been widely promoted under the claim that they offer an alternative way of solving the standard cosmological problems. Recent observational hints that the fine structure constant may have varied during over cosmological scales also has given impetus to these models. In theoretical physics the speed of light, $c$, is hidden in almost all equations but with different facets that we try to distinguish. Together with a reminder on scalar-tensor theories of gravity, this sheds some light on these proposed varying speed of light theories.Comment: 14 pages, Late

A Search for leptophilic Z_(l) boson at future linear colliders

We study the possible dynamics associated with leptonic charge in future linear colliders. Leptophilic massive vector boson, Z_(l), have been investigated through the process e^(+)e^(-) -> mu^(+)mu^(-). We have shown that ILC and CLIC will give opportunity to observe Z_(l) with masses up to the center of mass energy if the corresponding coupling constant g_(l) exceeds 10^(-3).Comment: 12 pages, 10 figure

Technical decisions on reconstruction of drives and control systems of cranes

У статті розглядаються приклади технічних рішень по реконструкції приводів із застосуванням системи керування, як на основі тиристорного приводу з імпульсним регулюванням швидкостей, так і на основі частотного регулювання крановими електроприводами.In article examples of technical decisions on reconstruction of drives with control system use, as on basis of a thyristors drive with pulse regulation of speeds, and on the basis of frequency regulation crane electric drives are considere

New Experimental limit on Optical Photon Coupling to Neutral, Scalar Bosons

We report on the first results of a sensitive search for scalar coupling of photons to a light neutral boson in the mass range of approximately 1.0 milli-electron volts and coupling strength greater than 10$^-6$ GeV$^-1$ using optical photons. This was a photon regeneration experiment using the "light shining through a wall" technique in which laser light was passed through a strong magnetic field upstream of an optical beam dump; regenerated laser light was then searched for downstream of a second magnetic field region optically shielded from the former. Our results show no evidence for scalar coupling in this region of parameter space.Comment: pdf-file, 10 pages, 4 figures, submitted to Physical Review Letter