We consider a multi-source status update system, where each source generates packets according to Poisson process which are then served generally distributed service time. For this M/G/1/1 queueing model, we self-preemptive packet management policy and derive the moment generating functions (MGFs) of age information (AoI) peak AoI source. According policy, an arriving fresh preempts possible sa...

Information freshness in IoT-based status update systems has recently been studied through the Age of (AoI) and Peak AoI (PAoI) performance metrics. In this paper, we study a discrete-time server arising multi-source IoT which accepts incoming information packets from multiple sources so as to be forwarded remote monitor for purposes. Under assumption Bernoulli packet arrivals common geometric ...

conclusions preemptive clonidine has many marvelous advantages over midazolam, including better sedation inside the operating room and then in the post-operative care unit, lower fentanyl doses are required during surgery, more stable heart rate and blood pressure are observed during the procedure, and patients report lower post-operative pain scores. objectives to compare the effect of preempt...

Many patients undergoing plastic surgery experience significant pain postoperatively. The use of preemptive, multimodal analgesia techniques to reduce postoperative pain has been widely described in the literature. This quality improvement project evaluated the implementation of a preemptive, multimodal analgesia protocol in an office-based plastic surgery facility to decrease postoperative pai...

This study aims to compare the effects of four types of FFI on second language vocabulary learning. To do so, the study adopted a quasi-experimental pretest-posttest design, including five groups, each receiving a distinct treatment. The participants were 80 fourth-grade male students ranging in age from 17 to 19. Before the treatment phase, the participants took a researcher-made test of vocab...

In the recent years, constraint programming has been applied to a wide variety of academic and industrial non-preemptive scheduling problems, i.e., problems in which activities cannot be interrupted. In comparison, preemptive scheduling problems have received almost no attention from both the Operations Research and the Artificial Intelligence community (see, for example, (Demeulemeester, 1992)...

We design an algorithm of the best possible competitive ratio for preemptive and non-preemptive scheduling of unit size jobs with rejection on three identical machines. The algorithm does not use preemption even for the preemptive variant, and it has the interesting feature that one of its parameters is not fixed in advance, and it is defined based on the properties of the first input job havin...