A suitable material for the production of optical harmonics musthave a nonlinear dielectric
coef-ficient and be transparent to both the fundamental optical frequency and the desired …

jk where X," &'are coefficients characteristic of the particular crystal and the superscripts serve
to indicate the relevant frequencies. These coef-ficients are subject to restrictive relations …

An important unanswered question concerning the sidewise motion of 180 domain walls in
single crystal BaTi O 3 is the mechanism by which the boundaries move. This paper …

The admittance of the piano bridge has a crucial effect on piano tone by coupling together
the strings belonging to one note into a single dynamical system. In this paper, we first …

In the experiment, the sources were Trion In-struments, Inc., pulsed ruby lasers—one operated
at room temperature, the other at liquid nitrogen temperature. Abella and Cummins' have …

An acoustic field which varies sinusoidally in time is completely determined by the complex
values of its pressure on two concentric spheres. We have developed an experimental …

Abstract Theory and experiment are presented for the drag exerted on electrons in a solid
by a traveling ultrasonic wave. After a discussion of the reasons why the effect is generally …

The presence in a semiconductor of both signs of current carriers makes it possible to disturb
the spatial distribution of these carriers appreciably without giving rise to electrical space …

Background ApneaLink is a novel single-channel screening device for sleep apnea detection
which is based on pressure-transduced measurement of oronasal airflow, summarised as …

BACKGROUND: Several studies have analysed adherence to continuous positive airway
pressure (CPAP) therapy but little is known on the effects of age and gender. METHODS: Data …