Steven Martin

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In this paper, we are interested in real-time flows requiring quantitative and deterministic QoS (quality of service) guarantees. We focus more particularly on two QoS parameters: the worst case end-to-end response time and jitter. We consider a FIFO (first in first out) scheduling of flows. The FIFO scheduling is the simplest one to implement and very(More)
BACKGROUND Vitamin D testing is increasing worldwide. Recently several diagnostic manufacturers including Abbott and Siemens have launched automated 25-hydroxy vitamin D (25OH-D) immunoassays. Furthermore, preexisting assays from DiaSorin and Roche have recently been modified. We compared the performance of 5 automated immunoassays, an RIA and 2 liquid(More)
BACKGROUND Understanding and measuring mental health and wellbeing amongst teenagers has recently become a priority. The Warwick-Edinburgh Mental Well-being Scale (WEMWBS) is validated for measuring mental wellbeing in populations aged 16 years and over in the UK. We report here a study designed to establish the validity and reliability of WEMWBS in(More)
BACKGROUND/AIMS To describe the prevalence of liver disease in a cohort of 241 cystic fibrosis (CF) patients. METHODS 241 CF patients were followed-up every 3 months with clinical and biological assessment, and every year with ultrasonography of the liver. The presence of liver disease was studied using a multivariate Cox's regression analysis including(More)
With the enormous growth in processor performance over the last decade, it is clear that reliability, rather than performance, is now the greatest challenge for computer systems research. This is particularly true in the context of Internet services that require 24x7 operation and home computers with no professional administration. While operating system(More)
The Falcon is a relatively inexpensive 3-DOF haptic device made by Novint for the gaming industry. The controller uses a form similar to that of the delta-robot configuration and because of this form, makes an interesting apparatus for research into control and estimation problems for robots involving parallel linkages. This paper presents the results of(More)
Daptomycin is a 13 amino acid, cyclic lipopeptide produced by a non-ribosomal peptide synthetase (NRPS) mechanism in Streptomyces roseosporus. A 128 kb region of S. roseosporus DNA was cloned and verified by heterologous expression in Streptomyces lividans to contain the daptomycin biosynthetic gene cluster (dpt). The cloned region was completely sequenced(More)
Friedreich's ataxia (FRDA), an autosomal recessive cardio- and neurodegenerative disease, is caused by low expression of frataxin, a small mitochondrial protein, encoded in the nucleus. At the biochemical level, the lack of frataxin leads to dysregulation of mitochondrial iron homeostasis and oxidative damage, which eventually causes neuronal death. It is,(More)
The natural history of chronic hepatitis B in children is influenced by mode of transmission and varies with regional endemicity. Seroconversion rates were studied in 174 hepatitis B e antigen (HBeAg)-positive children who were of different ethnic origins and living in Canada. Overall, 40.2% became anti-HBeAg positive, and 8.6% were hepatitis B(More)
In this paper, we are interested in real-time flows requiring quantitative and deterministic Quality of Service (QoS) guarantees. We focus more particularly on two QoS parameters: the worst case end-to-end response time and jitter. We consider a non-preemptive scheduling of flows, called FP/FIFO, based on fixed priorities. On each node, packets are(More)