Slow cardiovascular (CV) recovery after stress is a predictor of adverse CV outcomes. Perseverative cognition (PC) about stress has been hypothesized to co-determine slow recovery. In the present study, it was investigated whether two types of trait PC, i.e. trait worry and trait rumination, predicted delayed cardiac recovery after a cognitive stressor. Furthermore, it was examined whether expl...

Tree-based overlay networks (TBŌNs) have become important for scalable data multicast and aggregation. This infrastructure’s generality has lead to widespread usage in large scale and widely distributed environments – environments in which reliability must be addressed. This paper presents state compensation, a novel reliability concept for TBŌN environments that avoids explicit state replicati...

objective: to evaluate the current scientific evidence for the applicability, safety and effectiveness of pathways of enhanced recovery after emergency surgery (eras). methods: we undertook a search using pubmed and cochrane databases for eras protocols in emergency cases. the search generated 65 titles; after eliminating the papers not meeting search criteria, we selected 4 cohort studies and ...

In the operation of continuous processes, many tasks require the knowledge of plant steady state at various operating points. This is for example the case in the context of kinetic modeling, response surface modeling and real-time optimization. If the computational techniques are in principle straightforward, the time needed to reach steady state represents the main limiting factor. This work p...

In code division multiple access mobile cellular networks, the transmission quality can be improved by using the soft handoff techniques. The present investigation is concerned with the admission control policies by exploiting the soft handoff coverage area of the cellular radio network. We suggest finite Markov models for the admission control based on reserve channel and sub-rating policies. ...

One of the challenges in automating a call center is the tradeoff between customer satisfaction and the cost of human agents: i.e., most callers prefer human agents to automated systems, but adding human agents substantially increases call center operating costs. One possible compromise is to let callers use automation at the beginning of the call and bring in a human agent if they have problem...

This article presents an original way to enrich the monitoring of discrete-event systems named active diagnosis. The objective of on-line active diagnosis is to find an admissible sequence of actions (or plan) that refines the diagnosis without radically changing the mission plan. This paper has two major contributions. First, active diagnosis is formally defined in the finite-state automata th...

This paper studies the effects of desynchronization attacks such as delay and warping on the performance of watermark detection systems. First, we quantify the connection between attack channel estimation accuracy and detection performance. Second, we show how to design watermarks that minimize probability of error of the detector. Evaluation of the optimal likelihood ratio test is often comput...

In this paper an iterative channel estimation technique for a mobile fourth generation coherent Orthogonal Frequency Division Multiplexing (OFDM) system is proposed. Coherent detection dictates that a per-subband estimate of the frequency response of the channel is generated for each OFDM symbol. This is often achieved by inserting pilot symbols amongst the data symbols in the OFDM modulation g...