We study the regularity of semihyperbolic patches of self-similar solutions near sonic lines to a Riemann problem for the two-dimensional (2-D) Euler system. As a result, it is verified that there exists a global solution in the semihyperbolic patch up to the sonic boundary and that the sonic boundary has C1-regularity. The study of the semihyperbolic patches of solutions for the Euler system w...

The Sonic Flashlight is an ultrasound (US) device that projects real-time US images into patients with use of a semireflective/transparent mirror. The present study evaluated the feasibility of use of the Sonic Flashlight for clinical peripherally inserted central catheter placements, originally with the mirror located inside a sterile cover (n = 15), then with the mirror outside (n = 11). Succ...

A compensated compactness framework is established for sonic-subsonic approximate solutions to the two-dimensional Euler equations for steady irrotational flows that may contain stagnation points. Only crude estimates are required for establishing compactness. It follows that the set of subsonic irrotational solutions to the Euler equations is compact; thus flows with sonic points over an obsta...

This paper presents our system for transcription of polyphonic piano music – SONIC. SONIC takes an audio signal of a piano performance and tries to determine which notes were played by the performer, thus producing a list of notes and note onset times approximately matching the performance. SONIC is composed of three main parts: partial extractor, onset detector and note recognizer. We present ...

We review some accelerator physics topics for circular as well as linear colliders, considering both lepton and hadron beams. Invited Contribution to Review of Accelerator Science & Technology, Vol. 7 (2014), Editors Alexander W. Chao and Weiren Chou, World Scientific Pub., Singapore The research leading to these results has received partial funding from the European Commission under the FP7 Re...

This paper is a design report on a prototype musical controller based on fiberoptic sensing pads from Tactex Controls [8]. It will discuss elements of form factor, technical design, and tuning/sound generation systems tested while building the device I have dubbed ‘the Ski’. The goal is the creation of a fine musical instrument with which a skilled performer can play music from standard reperto...

Previous work has shown that the posteriorising agent retinoic acid can accelerate anterior neuronal differentiation in Xenopus laevis embryos (Papalopulu, N. and Kintner, C. (1996) Development 122, 3409-3418). To elucidate the role of retinoic acid in the primary neurogenesis cascade, we investigated whether retinoic acid treatment of whole embryos could change the spatial expression of a set ...