tion system to synchronize electronic communication. The primary metric used to quantify the performance of a clock distribution system is clock skew. Synchronous systems require multiple copies (outputs) of the same clock, and clock skew is the unwanted delay between any two of the copies. In general, the lower the skew, the better the clock system. Clock skew is one of several parameters that...

With the development of supply-side reform road transportation in China and rapid public transportation, pressure security management is also increasing. According to statistics transport safety accidents, number accidents deaths accounts for about 1% total relevant traffic China, among which 93% bus are caused by drivers’ violations. And, therefore, order predict dangerous driving behavior dri...

We evaluate the variation of inter-cell arrival times, namely jitter, as seen by a workstation. We present experimental results of actual jitter measurements on the FORE ASX200BX switch and a Pentium workstation running Linux. We analyze how the ATM network card device driver on a workstation perceives the jitter introduced by the network. We conclude from our data that the cell clumping that t...

The existing worst-case response-time analysis for Controller Area Network (CAN) calculates upper bounds on the response times of messages that are queued for transmission either periodically or sporadically. However, it does not support the analysis of mixed messages. These messages do not exhibit a periodic activation pattern and can be queued for transmission both periodically and sporadical...

Driver celeration (speed change) behavior of bus drivers measured a number of times was used to predict their culpable accidents over increasing time periods. It was found that predictive power was considerable (>.30 correlation) over 5 years of time with aggregated celeration (mean of repeated measurements) as independent variables, and there were also indications that power reached even furth...

CASE HISTORY A 65-yr-old male, current smoker of .30 cigarettes?day (total smoking history 150 pack-yrs), who was working as a bus driver, presented at the Evangelismos Hospital (Athens, Greece) complaining of increasing breathlessness on exertion and dry cough during the past 2 months. He had no animal exposure and he hadn’t travelled abroad during the last few years. His medical history showe...