We present a type of sonic crystal composed with an array of two-dimensional Helmholtz resonators, which in the long-wave regime have both a high relative acoustic refractive index n and at the same time, a small acoustic impedance Z mismatch with air for airborne sound. We analyze the n and Z of such sonic crystals by finite-difference time-domain simulations, and by mapping our results to a c...

The physical and data link layer of the network stack contain valuable information. SoNIC (Software-defined Network Interface Card) provides software access to these layers by implementing them in software. It provides complete control over network stack in real-time. With SoNIC, we are able to perform precise network measurements. Also, GENI (Global Environment for Network Innovations) provide...

Samplers are characterized at ECBC using the following methods: (1) monodisperse fluorescent/nonfluorescent PSL microspheres with fluorometric analysis or Counter analysis, (2) polydisperse solid aluminum oxide particles with APS analysis or Coulter Multisizer analysis, (3) fluorescent oleic acid particles with fluorometric analysis, and (4) bioparticles with Coulter Multisizer, culturing, ELIS...

Audio watermarking has been used mainly for digital sound. In this paper, we extend the range of its applications to live performances with a new compositionmethod for real-time audio watermarking. Sonic watermarkingmixes the sound of the watermark signal and the host sound in the air to detect illegal music recordings recorded from auditoriums.We propose an audio watermarking algorithm for son...

We describe a first implementation of the technology used in Sonic City, an on-going project aiming to transform the experience of a user walking through an urban environment into a dynamic and real time music creation process.

Are there related proteins? Lots. In mammals, Sonic is related to two other hedgehogs: Indian and Desert. When expressed appropriately, the three proteins can substitute for one another but they do have unique functions: Desert hedgehog is needed for spermatogenesis and Indian hedgehog regulates cartilage differentiation. In the zebrafish, Sonic is related to Tiggywinkle hedgehog — which is tho...

The present work evaluates the application of artificial neural networks for pattern recognition of ultrasonic signals using pulse-echo and TOFD (Time of Flight Diffraction) techniques in weld beads. In this study pattern classifiers are implemented by artificial neural network of backpropagation type using MATLAB. The ultrasonic signals acquired from pulse-echo and TOFD were introduced, separ...

Richard S. Gross (Jet Propulsion laboratory, California institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91 109; ph: 1-818-354-4010; fx: 1-818-393-6890; email: Richard [email protected]. gov) Yi Chao (Jet Propulsion Laboratory, California Institute of Teclmology, 4800 Oak Grove Drive, Pasadena, CA 91 109; ph: 1-818-354-8168; fx: 1-81 8-393-6720; email: [email protected]. gov) Steven L. ...

Many believe that objective morality requires a theistic foundation. I maintain that there are sui generis objective ethical facts that do not reduce to natural or supernatural facts. On my view, objective morality does not require an external foundation of any kind. After explaining my view, I defend it against a variety of objections posed by William Wainwright, William Lane Craig, and J. P. ...