This paper investigates the issue of practical load balancing in the highly dynamic environment of local area networks (LANs). Most existing dynamic load balancing techniques dispatch the jobs immediately upon arrival irrespective of the overall loading of the LAN. This may lead to system saturation and thrashing. Moreover, these schemes focus on steady state system throughput without consideri...

During the 1997/98 luminosity run of the Stanford Linear Collider (SLC), two novel RF-based detectors were brought into operation, in order to monitor the interaction-point (IP) bunch lengths and uctuations in the relative arrival time of the two colliding beams. Both bunch length and timing can strongly a ect the SLC luminosity and had not been monitored in previous years. The two new detector...

Adaptive multimedia is promising in wireless/mobile networks since it mitigates the ¯uctuation of resources caused by mobility in these networks. However, bandwidth adaptation entails the bandwidth degradation for some applications. In order to effectively characterize the bandwidth degradation and to provide better quality of service (QoS) to users, we propose two new QoS parameters for adapti...

H.263+ is an emerging video compression standard for the low bit rate visual communication. Up to now, most H.263+ rate control algorithms, especially that in the test model of the near-term (TMN), focus on macroblock level bit allocation and low latency under a constant-frame-rate and constant-bit-rate (CBR) channel. As expected, these algorithms are not capable of handling the transmission ba...

Event-by-event fl uctuations of electric charge have been proposed as signals of quark-gluon plasma creation in ultrarelativistic heavy ion collisions, but can not be confi rmed in experiments. We apply a quark molecular dynamics model which describes dynamically the transition from a gas of interacting quarks to hadrons via the formation of colour neutral clusters. We fi nd a corresponding cha...

Over the past 80 years, the source and mechanism of the International Great Depression (IGD) has been a heated topic of interest with little consensus on the horizon. In this paper, we compare the Great Depressions in the US and Western Europe using the business cycle accounting method a la Chari, Kehoe and McGrattan (CKM 2007). We extend the business cycle accounting model by including endogen...

This paper discusses techniques for transmitting smoothed video more eeciently over a wireless network. The uctuation of wireless channel conditions can add a signiicant amount of delay to video packets and cause them to miss their play-out time. If a video is smoothed, it is possible to selectively deliver packets delayed at the base-station to reduce the impact of the missing packets to the v...

Using recent experimental limits on distortions from COBE FIRAS, and the large lever-arm spanning the damping of sub-Jeans scale uctuations to the scale of the COBE DMR uctuations, we set a constraint on the slope of the primordial power spectrum n. It is possible to analytically calculate the contribution over the full range of scales and redshifts, correctly taking into account uctuation grow...

We propose a timescale decomposition approach to measurement-based admission control (MBAC). We identify a critical timescale f T h such that: 1) aggregate traac uctuation slower than f T h can be tracked by the admission controller and compensated for by ow admissions and departures; 2) uctuations faster than f T h have to be absorbed by reserving spare bandwidth on the link. The critical time...

There is great interest in promoting the use of contrast agents in optical imaging for better diagnosis of diseases. However, until recently, there was still no quantitative method existing to assess the ability of contrast agents in improving clinical diagnosis. In this study, we used the method of task-based medical image analysis as a quantitative tool to evaluate the e¤ectiveness of nanopar...