We present space-time-resolved measurements of electromagnetic pulses tunneling through a coaxial electromagnetic band gap structure. The results show that during the tunneling process the field distribution inside the barrier is an exponentially decaying standing wave whose amplitude increases and decreases as it slowly follows the temporal evolution of the input pulse. At no time is a pulse m...

In this paper, the analysis of low-frequency zone of the speech signals from the five Spanish vowels, by means of the Teager energy operator (TEO) and the modified group delay functions (MGDF) is proposed for the automatic detection of Parkinson’s disease. According to our findings, different implementations of the TEO are suitable for tackling the problem of the automatic detection of Parkinso...

In December 2010, the Fraser Institute released its twentieth annual measurement of waiting times for medically necessary treatments in Canada (Barua et al., 2010). This most recent measurement shows that the national median waiting time from specialist appointment to treatment increased from 8.0 weeks in 2009 to 9.3 weeks in 2010. But the measurement of waiting times, or the examination of the...

We investigate the packet delay and loss characteristics of the wide-area HIPPI-based CASA gigabit testbed. Developed for high{speed local area device interconnects, HIPPI is a point{to{point, connection{oriented protocol. We show HIPPI blocking can degrade performance by increasing delay and/or packet loss. In the CASA network under conditions of blocking, a tradeoo exists between packet loss ...

We investigate the packet delay and loss characteristics of the wide-area HIPPI-based CASA gigabit testbed. Developed for high{speed local area device interconnects, HIPPI is a point{to{point, connection{oriented protocol. We show HIPPI blocking can degrade performance by increasing delay and/or packet loss. In the CASA network under conditions of blocking, a tradeoo exists between packet loss ...

Measurement and analysis of various network traffic attributes have played a major role for development of many network protocols and systems. Traffic parameters such as delay, loss, bandwidth, jitter etc are of due interest to design effective network systems. Utilities like PING can be used to measure delay and loss, but it is having poor results as it is suffered from loss asymmetry problem....

This paper presents results of wide band path loss and delay spread measurements for two representative microcellular environments in the San Francisco Bay area in the 1900 MHz band. The results presented in this paper provide insight into the statistical distributions of measured path loss by showing the validity of a double regression model with a break point at a distance that has first Fres...

Internet packet loss and delay exhibits temporal dependency. If packet n is lost, packet n + 1 is also likely to be lost. It leads to bursty network losses and late losses in real-time multimedia services such as Voice over IP (VoIP). This may degrade perceptual quality and the effectiveness of Forward Error Correction (FEC). To characterize this burstiness, we rst discuss the modeling of packe...

Traditional loss-based TCP congestion control (CC) tends to induce high queuing delays and perform badly across paths containing links that exhibit packet losses unrelated to congestion. Delay-based TCP CC algorithms infer congestion from delay measurements and tend to keep queue lengths low. To date most delay-based CC algorithms do not coexist well with loss-based TCP, and require knowledge o...

active queue management (aqm) plays an important role in the internet congestion control. it tries to enhance congestion control, and to achieve tradeoff between bottleneck utilization and delay. random early detection (red) is the most popular active queue management algorithm that has been implemented in the in internet routers and is trying to supply low delay and low packet loss. red algori...