The IBM Virtual Tape Server provides a revolutionary tape storage solution that emulates tape drives using a disk cache, providing up to 256 virtual tape-drive images and stacking the virtual tape volumes onto a maximum of 12 physical tape drives. The high ratio of virtual to physical drives, combined with the stacking of virtual volumes, provides tape storage that is both costand space-efficie...

Network stack performance is critical to server scalability and user-perceived application experience. Perpacket overhead is a major bottleneck in scaling network I/O. While much effort is expended on reducing perpacket overhead for data-carrying packets, small control packets such as pure TCP ACKs have received relatively scarce attention. In this paper, we show that ACK receive processing can...

In search of potent cholinesterase inhibitors, we have carried out the synthesis and biologically evaluation of various benzaldehyde based 2,3-dihydroquinazolin-4(1H)-one derivatives. In vitro assay results revealed that all the synthesized compounds showed activity against both enzymes (AChE and BChE) and in few cases, the inhibition activity was even higher than or comp...

Standard TCP is the de facto reliable transfer protocol for the Internet. It is designed to establish a reliable connection using only a single network interface. However, standard TCP with single interfacing performs poorly due to intermittent node connectivity. This requires the re-establishment of connections as the IP addresses change. Multi-path TCP (MPTCP) has emerged to utilize multiple ...

Résumé. De nos jours, le statisticien n’a plus nécessairement le contrôle sur la récolte des données. Le besoin d’une analyse statistique vient dans un second temps, une fois les données récoltées. Par conséquent, un travail est à fournir lors de la phase de préparation des données afin de passer d’une représentation informatique à une représentation statistique adaptée au problème considéré. D...

The electronic exchange of business documents is an often communicated desire by enterprises and the public sector. Electronic business is currently mainly hindered by unresolved interoperability issues and a lack of tool support. Additionally, computer aided document exchange is cost intensive at the beginning and thus discourages small and medium-sized companies to adapt to new technologies. ...

Les arbres sont principalement la structure de donnée utilisés pour stocker des données ordonnées et d’après Knuth la plus importante structure non-linéaire intervenant dans l’informatique. Ils sont très utilisés dans tous les domaines, parce que bien adaptés à la représentation naturelle d’information organisée homogène, et d’une grande rapidité et commodité de manipulation. On trouve cette st...