Ray-wave geometric beam is an exotic kind of structured light with ray-wave duality and coupled diverse degrees freedom (DoFs), which has attracted intense attention due to its potential applications in theories applications. This work offers a new insight that the traditional beams can be seen as transverse standing-wave (SW) beams, decomposed into superposition traveling-wave (TW) beams. We c...

In 1997 the author published an article on vertical full (and ground plane type half) wave loops for 80 meter DX. In that article it was noted that perpendicular (horizontal) polarization is the preferred polarization, particularly at low elevation angles, since horizontally polarized waves are hardly affected by the finite conductivity of the ground in front of the antenna. An exception when v...

INTRODUCTION The first ultrasonic motor was developed by V.V. TYPES OF ULTRASONIC MOTOR ULTRASONIC MOTOR STANDING TRAVELLING WAVE TYPE. Www.slideworld.com www.pdf-searchengine.com. X2022 The first ultrasonic motor was introduce by v.v lavrinko in 1965.x2022 An. Ultrasonic motor Standing Traveling wave wavebidirectional unidirectional 8. Rakesh R.standing wave piezoelectric linear ultrasonic mot...

Andrew R. Wade, Kirk McKenzie, Yanbei Chen, Daniel A. Shaddock, Jong H. Chow, and David E. McClelland Centre for Gravitational Physics, Department of Quantum Science, The Australian National University, Canberra, ACT, 0200, Australia Jet Propulsion Laboratory (JPL), California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA Theoretical Astrophysics 350-17, Califor...

As an important way to control and manage heat transport, thermal rectification has become an elementary issue in the field of phononics and plays a key role in the designing of thermal devices. Here we investigate systematically the standing wave and the accompanying resonance process in asymmetric nanowires to understand the standing wave itself and its great effect on thermal rectification. ...

Standing wave field distributions in three classic types of graded-index antireflection coatings are studied. These graded-index antireflection coatings are designed at wavelengths from 200 nm to 1200 nm, which is the working wavelength range of high energy laser system for inertial-fusion research. The standing wave field distributions in these coatings are obtained by the numerical calculatio...

background: the incomplete maturation of brain in preterm children results in long-term neurodevelopmental impairment. this study aimed to investigate the static balance function in children with a history of preterm birth. methods: participants were 31 preterm children including 21 moderately preterm (mpt), 10 very preterm (vpt), and 20 term children aged 5.5 and 6.5 years. the cervical vestib...