On an attractive inverse-square potential in an elastic medium with a screw dislocation

We consider an elastic medium with the distortion of a circular curve into a vertical spiral. Then, we investigate the topological effects of a charged screw dislocation on the attractive inverse-square potential that stems from the interaction of the induced electric dipole moment of a neutral quasiparticle with an electric field. We show that an analogue of the Aharonov–Bohm effect for bound states can be obtained. In addition, we consider a rotating reference frame. Thus, we analyze an Aharonov–Bohm-type effect for bound states and the arising of a coupling between torsion and the angular velocity.

Hybrid Renewable Resource Power Generation using Back to Back Voltage Source Converter with Output Regulation

There is a massive and rapid development in the industry and prevailing population inflation due to which the energy demand spikes. The increase in demand dilates the gap between the energy supplied and usage which makes the power quality important to consider, otherwise it causes voltage, current or frequency deviations which has unfavourable consequences in customer’s equipment or result in failure. To overcome this the concept of complementary usage of wind and solar cogeneration system is introduced along with the topology with Neutral Point Clamped inverter which has 3-level output converter that decreases the harmonics and the switching rate, it also features the regulation of the VSC through fuzzy based control scheme in the rotating reference frame of wind-solar cogeneration system with no extra DC/DC conversion stages.

Local Heat Transfer Distributions Within a Rotating Pin-Finned Brake Disk

This study presents local temperature and heat transfer coefficient distributions obtained experimentally on the internal surfaces of a rotating pin-finned brake rotor at realistic rotation speeds for braking (i.e., N = 100–300 rpm). To this end, the thermochromic liquid crystal technique in a rotating reference frame was employed. The results demonstrate that the bulk airflow within the ventilated channel of a rotating disk follows a predominantly backward sweeping inline-like path between the pin fins. Internal local heat transfer is distributed nonuniformly on both inboard and outboard surfaces, with twice higher average cooling from the outboard surface than the inboard surface: this possibly exacerbates the thermal stresses, which leads to thermal distortion of the rotor (i.e., coning).

Scalar field in a uniformly rotating frame in the time-dislocation space–time

We analyze the relativistic quantum effects induced by the topology associated with a time-dislocation space–time and produced by the angular velocity associated with a rotating reference frame, on a scalar field. The parameters related to the torsion of the dislocation and to the angular velocity of the rotating reference frame impose lower and upper limits of the radial coordinate. At these limiting values of the radial coordinate, boundary conditions are assumed, in order to determine the energy levels. We show that in this scenario, two interesting physical phenomena arise, namely, the Sagnac-like and the Aharonov–Bohm-like effects.