Resumen. Este artículo describe el Modelo de Realización de Metamorfosis. El propósito principal de este marco es proporcionar la base conceptual necesaria para el establecimiento de vínculos persistentes y controlables entre la especificación de los requisitos funcionales del sistema (expresado como un Modelo de Casos de Uso) y el producto de su análisis (representado a través de un Modelo de ...

Current majority voting mechanism usually used in intrusion tolerant system have some limits. To solve this problem, a novel adaptive probability voting mechanism based on double threshold values is proposed. The intrusion tolerance system based on this voting mechanism can provide correct and reliable services continually in case of existing fault or intrusion and detect the faulty server repl...

this paper analyzes an m/m/2 queueing system with two heterogeneous servers. both servers goes on vacation when there is no customers waiting for service after this server 1 is always available but the other goes on vacation whenever server 2 is idle. the vacationing server however, returns to serve at a low rate as an arrival finds the other server busy. the system is analyzed in the steady st...

SCTP (Stream Control Transmission Protocol) is a new IETF transport protocol over the IP network. Transport protocol is responsible for reliable delivery of a message form a host to another host. We proposed and implemented an efficient file transfer system using the SCTP multiple file transfer and modified STCP congestion control mechanism to guarantees a stable data transfer with multi-stream...

This paper presents an interactive and cooperative VideoConference Recording On-demand system (ViCRO) designed for remote playback, recording and browsing multimedia sessions over the Internet MBone. It consists of Media Servers, possibly cluster-based, and Media Clients. The interaction multiclient/multi-server is based on the RTSP protocol for streaming control, on the RTP protocol for multim...

Nowadays, embedded systems are more and more present around us, with an increasing accessibility need. Instead of using dedicated protocols, involving dedicated client and server softwares, we claim that embedding a Web server into these systems allows a great accessibility, interoperability, maintenability and easiness of development. So anyone can access and configure a router, a sensor or a ...

For more than 40 years, the Nuclear Energy Agency of the OECD countries and the International Atomic Energy Administration of the United Nations have published a biannual document with the title “Uranium Resources, Production and Demand”. This book, known as the “Red Book”, summarizes data about the actual and near future nuclear energy situation and presents the accumulated worldwide knowledge...

A two-persons bargaining problem often consists of initially incompatible demands that can be unilaterally reduced by sequential concessions. In a 2 × 2 × 2– factorial design we distinguish between reliable and unreliable concessions, between a static and dynamic settings and between symmetric and asymmetric initial demands. Whereas reliable concessions change the threat point, unreliable conce...

The reliable server pooling is a framework to handle session failures and increase the system’s availability by providing several reliability services: from simple server selection to a full session-failover capability. In the IETF RSerPool, servers with equivalent functionality are pooled together; when a particular server becomes unavailable, a client application can transparently switchover ...

Consensus is a server developed to produce high-quality alignments for comparative modeling, and to identify the alignment regions reliable for copying from a given template. This is accomplished even when target-template sequence identity is as low as 5%. Combining the output from five different alignment methods, the server produces a consensus alignment, with a reliability measure indicated ...