Database buffering normally assumes that a proper measure of performance is the number of pages transferred. This paper justifies that the number of I/O’s is the proper unit of measure. From this we derive a buffering policy that improves over known buffering policies for nested loop joins, we derive some buffering policies for hashing joins, and we make an observation about selections and quer...

Multimedia streams usually require prefetching and buffering to ens’ure steady, glitch-fnee d e h e r y to audio and video displays, but buffering ca’uses undesirable latency. This latency may be manifested as startup delays, glitches, dropouts, and loss of synchronization. I n interactive media presentations .where there are a small number of choices, alternative streams can be prefetched to r...

The paradigm of “buffering” is applied to multiple phenomena of diverse nature. Similarly, a great variety of units for the quantitation of buffering action has been proposed. Fundamental aspects regarding the definition and quantitation of “buffering” remain unclear or unresolved. i) Is there a single common principle behind these diverse buffering phenomena? Or is “buffer” an equivocal label ...

This paper uses analysis and experiments to study the minimal buffering requirements of congestion controlled multimedia applications. Applications in the Internet must use congestion control protocols, which vary transmission rates according to network conditions. To produce a smooth perceptual quality, multimedia applications use buffering and rate adaptations to compensate these rate oscilla...

AIMS During activation of cardiac myocytes, less than 1% of cytosolic Ca is free; the rest is bound to buffers, largely SERCA, and troponin C. Signalling by phosphorylation, as occurs during β-adrenergic stimulation, changes the Ca-binding affinity of these proteins and may affect the systolic Ca transient. Our aim was to determine the effects of β-adrenergic stimulation on Ca buffering and to ...

In a wireless ATM system, a network must provide seamless services to mobile users. To support this, mobility function should be added to existing ATM networks. Through a handoff operation, a mobile user can receive a service from the network without disconnecting the communication. A handoff results in connection path rerouting during an active connection. To avoid cell loss during a handoff, ...

Motivated by applications to goodness of fit degenerate U-statistics testing, the Jackknife empirical likelihood approach for U-statistics is generalized to degenerate U-statistics. The proposed empirical likelihood based goodness of fit tests are asymptotically distribution free. The asymptotic theory for testing shift of location, spatial depth testing for central symmetry, Cramér-von Mises t...

We have investigated the detailed regulation of neuronal firing pattern by the cytosolic calcium buffering capacity using a combination of mathematical modeling and patch-clamp recording in acute slice. Theoretical results show that a high calcium buffer concentration alters the characteristic regular firing of cerebellar granule cells and that a transition to various modes of oscillations occu...