Thermoacoustic-Stirling hybrid engines and feedback pulse tube refrigerators can utilize jet pumps to suppress streaming that would otherwise cause large heat leaks and reduced efficiency. It is desirable to use jet pumps to suppress streaming because they do not introduce moving parts such as bellows or membranes. In most cases, this form of streaming suppression works reliably. However, in so...

The flow field in an acoustic standing wave tube was measured using time-resolved particle image velocimetry (PIV). Verifications were made through comparisons between measured and predicted acoustic particle velocities in the spatial domain and the time domain. The accuracy of the time-resolved PIV system was satisfactory, at least for the periodic flow velocity component. The steady streaming...

As high-speed Internet connections and Internet streaming media become widespread, the demand for high-performance, cheap Internet streaming servers increases. In this paper, we look into the performance limitations of streaming server applications running on PC servers with Linux, and propose a new kernel optimization called “stream engine” that combines both copy elimination and context switc...

Acoustic streaming induced by ultrasonic flexural vibrations and the associated convection enhancement are investigated. Acoustic streaming pattern, streaming velocity, and associated heat transfer characteristics are experimentally observed. Moreover, analytical analysis based on Nyborg's formulation is performed along with computational fluid dynamics (CFD) simulation using a numerical solver...

In the context of formal language recognition, we demonstrate the superiority of streaming property testers against streaming algorithms and property testers, when they are not combined. Initiated by Feigenbaum et al., a streaming property tester is a streaming algorithm recognizing a language under the property testing approximation: it must distinguish inputs of the language from those that a...

Multi-channel Peer-to-Peer (P2P) Video-on-Demand (VoD) systems can be categorized into independent-channel P2P VoD systems and correlated-channel P2P VoD systems. Streaming capacity for a channel is defined as the maximal streaming rate that can be received by every user of the channel. In this paper, we study the streaming capacity problem in multi-channel P2P VoD systems. In an independent-ch...

Multimedia streaming over the Internet has become popular over the years and expected to constitute 90% of Internet traffic in the near future. However, state-of-the-art solutions for multimedia streaming are inherently limited by their use of a single network path and a lack of efficient adaptation algorithms. Dynamic Adaptive Streaming over HTTP (DASH) is a new streaming technology that uses ...

The increasing power and connectivity of today’s computers have spurred the growth in streaming audio and video available on the Internet through the Web. While there is substantial research characterizing the performance of streaming media and characterizing documents stored on the Internet, there have been few studies characterizing streaming audio and video stored on the Web. We crawled over...

Copyright Protection is one of the many aspects of implementing a commercially successful video streaming solution. Copyright protection should be implemented using both passive schemes – such as watermarking – and active schemes – such as encryption. While some algorithms for encryption of video have been proposed, they are in the main unsuitable for implementation in a streaming video environ...