Acoustical and optical activity in alpha quartz

Ultrasound Contrast Agents Optical and Acoustical Characterization

Alpha activity in Indian thermal springs

ABSTRACT Background: and soils with which it comes in contact. There is dual exposure from radon in water i.e. due toinhalation of the radon released from the water into the ambient air and through ingestion whenwater is used for drinking. As radon contaminated water adversely affects the health, it istherefore fundamental from health and hygiene point of view to measure radium concentrationand...

Relating the Optical and Acoustical Properties of Oceanic Particles

Measurements include near forward optical scattering (providing information of cross-sectional area, and thus size, of aggregates, LISST, Sequoia Scientific), optical transmission and backscattering (WET Labs’ BB(RT)) and acoustical backscattering at 4.5MHz ( Nortek’s VECTOR). Concentrations of clays are siphoned out from the sampling volumes of the sensors and measured using suspended sediment...

Mechanical and optical nanodevices in single-crystal quartz

Young-Ik Sohn, a) Rachel Miller, 2 Vivek Venkataraman, 3 and Marko Lončar John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, Massachusetts 02138, United States Department of NanoEngineering, University of California San Diego, La Jolla, CA 92093, USA Department of Electrical Engineering, Indian Institute of Technology Delhi, New Delhi, I...

Structure and stability of the (001) alpha-quartz surface.

The structure and surface energies of the cleaved, reconstructed, and fully hydroxylated (001) alpha-quartz surface of various thicknesses are investigated with periodic density functional theory (DFT). The properties of the cleaved and hydroxylated surface are reproduced with a slab thickness of 18 atomic layers, while a thicker 27-layer slab is necessary for the reconstructed surface. The per...