Introduction As electronic messaging grew, it quickly became evident that some messages were more time critical than others. With this realization, a message priority scheme was instituted. Military torn-tape relays typically used four or five levels of priority, from low priority to high, such as routine, priority, immediate and flash. It was a general tenet of operation, that once a priority ...

With more than 80 transits observed in the CoRoT light curve with a cadence of 32 s, CoRoT-Exo-2b provides an excellent case to search for the secondary eclipse of the planet, with an expected signal of less than 10 in relative flux. The activity of the star causes a modulation on the flux that makes the detection of this signal challenging. We describe the technique used to seek for the second...

Pulse transit time, which correlates with blood pressure, is measured between the electrocardiogram R-wave peak and 50% raising front level of a photoplethysmographic (PPG) signal. Registered PPG signal bandwidth may be shared by noise and therefore the signal raising front is undetectable. Electrocardiogram reference adaptive sum comb filter was used to extract the harmonic components of the P...

1 Aim of This research is a Strategic analysis of seaports using multiple-criteria decision-making methods. At first, the strengths, weaknesses, opportunities and threats of Iranian seaports has been extracted from literature. Then, with respect to the importance concluded from LIKRET questionnaire distributed between experts (taking the views of the experts and specialist), five high importanc...

Deflection routing is one of the promising approaches to resolve contention in the optical burst switching networks. In the conventional deflection routing scheme, optical bursts may be unable to traverse the route evaluated to select an outgoing link because of the contention at succeeding downstream transit nodes. As a result, the optical bursts may traverse a different route resulting in a l...

We develop an approach to the analysis of average queueing delay in a tree network of discrete-time queues with constant senice time. The analysis of such systems is pertinent to packet-switehed data networks with fixed-length packets. Our solution is based on considering an equivalent network, in which at each node packets in transit are given priority over exogenous arrivals. The solution to ...