Performance modeling is an important topic in capacity planning and overload control for web servers. We present an M/G/1/K*PS queueing model of a web server. The arrival process of HTTP requests is assumed to be Poissonian and the service discipline is processor sharing. The total number of requests that can be processed at one time is limited to K. We obtain closed form expressions for web serve

We present a study of a novel variant of the Self-Organizing Map (SOM) called the Associative Self-Organizing Map (A-SOM). The A-SOM is similar to the SOM and thus develops a representation of its input space, but in addition it also learns to associate its activity with the activity of one or several external SOMs. The A-SOM has relevance in e.g. the modelling of expectations in one modality due

A consortium of interested parties has conducted an experimental characterization of two Tau parallel kinematic machines which were built as a part of the EU-funded project, SMErobot1. Characteristics such as machine stiffness, work envelope, repeatability and accuracy were considered. This paper will present a brief history of the Tau parallel machine, the results of this testing and some comment

Organizations need to make sure that their level of safety is acceptable. Therefore it is important to know which factors contribute to the level of safety and how to monitor and improve these factors. One method used today to evaluate the level of safety in organizations is safety culture measurements. In different contexts, different models of safety culture are used. Safety culture is often con

Popular Abstract in Swedish Cytokrom P450 är en stor enzymfamilj som finns i alla levande organismer och tar del i både endogen och exogen metabolism. De är primärt mono-oxygenaser och utför en stor mängd reaktioner. Till skillnad från många andra enzymer har de blivit optimerade för att kunna reagera med många olika substrat, istället för att ha höga reaktionshastigheter. I det aktiva sätet har dThe cytochromes P450 are a large enzyme family that is found in all living organisms and takes part in both endogenous and exogenous metabolism. They are primarily mono-oxygenases and perform a wide range of reactions. In contrast to many other enzymes, they have been optimised to react with a wide range of substrates instead of having high reaction rates. In the active site, these enzymes have a

En diskussion kring hur satser av typen "(samma bil) som jag har" skall analyseras: de har ibland uppfattats som attributiva relativsatser men numera vanligen som adverbiella komparativsatser (till det attributiva "samma"). En undersökning av ett par lagtexter på forndanska - där det fanns en lexikal åtskillnad mellan relativt "er" och komparativt "sum" - ger stöd för detta senare, om än inte helt