Pendulums have long been used as force sensors due to their ultimately low dissipation (high-quality factor) characteristic. They are widely in the measurement of gravitational constant, detection waves, and determination ultralight dark matter. Furthermore, it is expected that quantum nature gravity will be demonstrated by performing control for macroscopic pendulums. Recently, we entanglement...

High-performance optical communications require a very low bit error rate (BER) down to 10-15 with soft-decision (SD) forward correction (FEC). There are several performance metrics based on soft information for systems SD-FEC, but system budgets usually described conventional Q-factor converted from pre-FEC BER, hard decision its convenience and history. In this work, enhancing the feasibility...

A time-domain technique applicable to numerical and experimental application is used to determine the radiation Q of a turnstile antenna as a function of relatï e phasing between the two dipoles. Results confirm the theory that Q is a minimum with the dipoles in phase quadrature. Q 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 25: 95]100, 2000.

An accompanying numerical simulation for obtaining field patterns, resonant frequencies, and the Q factor is proposed to evaluate the experimental conditions of complex permittivity reconstruction by the perturbation method and thereby improve its accuracy and flexibility. This approach is illustrated by analyzing the measurement of dielectric constant and the loss tangent of wet movie film in ...

We prove an uncertainty relation, which imposes a bound on any joint measurement of position and momentum. It is of the form (∆P )(∆Q) ≥ C~, where the ‘uncertainties’ quantify the difference between the marginals of the joint measurement and the corresponding ideal observable. Applied to an approximate position measurement followed by a momentum measurement, the uncertainties become the precisi...

A new model is proposed for the measurement errors incurred in typical small-angle X-ray scattering (SAXS) experiments, which takes into account the setup geometry and physics of the measurement process. The model accurately captures the experimentally determined errors from a large range of synchrotron and in-house anode-based measurements. Its most general formulation gives for the variance o...

in the present study, the q factor is obtained for the central alborz in iran using the lg coda method. the energy of a seismic wave decays while passing through a ‘real’ medium such as the earth which is not completely elastic. the decay in energy is due to non-elastic phenomena and is called intrinsic attenuation and is characterized with the q parameter, the large values of which represent s...

In this paper, a minimally invasive dielectric sensor with compact footprint of 24x18 mm2 is presented. It based on two complementary split ring resonators (CSRRs) fed by microstrip coplanar waveguide configuration and placed 200 μm thick Kapton substrate. The device has been fabricated means multi-material 3D printer NanoDimension’s Dragonfly IV characterized exploiting different sensing metho...

Abstract The performance of superconducting radio-frequency (SRF) cavities depends on the niobium surface condition. Recently, various heat-treatment methods have been investigated to achieve unprecedented high quality factor (Q) and accelerating field (E). We report influence a new baking process called furnace Q-E behavior 1.3 GHz SRF cavities. Furnace is performed as final step cavity treatm...