Time Threshold Diagnostics

Time Loss Loss Threshold Threshold Timeout Timeout

In this paper we analyse congestion in TCP over ATM-UBR, in particular the association between the congestion measures at the ATM physical and TCP transport layers. In addition to the commonly used metrics, cell loss ratio (CLR) and packet retransmission ratio (PRR) two new indicators, protocol level congestion association factor (PLCAF) and CLR-PRR correlation coe cient are used. CLR and PRR a...

Leave·k·out Diagnostics for Time Series

We propose diagnostics for ARIMA model fitting for time series formed by deleting observations from the data and measuring the change in the estimates of the parameters. The use of leave-one-out diagnostics is a well established tool in regression analysis. We demonstrate the efficacy of observation deletion based diagnostics for ARIMA models, addressing issues special to the time diagnostics b...

Diagnostics for Time Series Analysis

Test statistics are proposed to determine the goodness of t of a time series model. The test statistics are based on a sequence of random variables that are independent and standard normal if the model is correct. The paper shows how to compute eeciently this sequence of random variables using a combination of Markov chain Monte Carlo and importance sampling. The power of the test statistics to...

Microfluidic diagnostics: time for industry standards.

Time-resolved transillumination for medical diagnostics.

A time-gated technique to improve the possibility of localizing spatial differences in absorption when transilluminating a turbid, highly scattering medium, such as human tissue, is demonstrated. When transmitting picosecond laser pulses and detecting photons on the opposite side of the object, the contrast can be strongly enhanced by detecting only the photons with the shortest traveling time....