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Recent Advances in Multimedia Information System Security

A multimedia communication system enables multimedia data's generation, storage, management, distribution, receiving, consuming, editing, sharing, and so on. In such systems, there are various security issues, which must be considered such as eavesdropping, intrusion, forgery, piracy and privacy, etc. Until now, various security solutions for multimedia communication systems have been...

Tags: Security, Multimedia, University Of Patras, Multimedia Communication System

White papers 2008-09-01

ISOLA a Fortran Code and a Matlab GUI to Perform Multiple-Point Source Inversion of Seismic Data

In this paper a software package for multiple or single point source inversion is presented. The package consists of ISOLA-GUI, a user-friendly MATLAB-based interface, and the ISOLA Fortran code, which is the computational core of the application. The software advantage is the graphical interface that provides the user with an...

Tags: Software, Fortran, GUI, Matlab, University Of Patras, Software Advantage, Tools & Techniques, Programming Languages, Management, Software Development, Software/Web Development

White papers 2008-07-01

Better Bounds for Online Load Balancing on Unrelated Machines

This paper studies the problem of scheduling permanent jobs on un-related machines when the objective is to minimize the Lp norm of the machine loads. The problem is known as load balancing under the Lp norm. It presents an improved upper bound for the greedy algorithm through simple analysis; this...

Tags: Load Balancing, Norm, Bound, University Of Patras, Network Technology, Engineering, Networking

White papers 2007-10-11

AMPS - ANStool: Interoperability of Automated Tools for the Provisioning of QoS Services

Modern IP-based packet networks carry a number of varying services, and one of their crucial aspects is the implementation of Quality of Service QoS techniques. Packet networks that support QoS can accommodate simultaneously different traffic types, such as data, voice, and video, by handling time-critical traffic appropriately at congestion points....

Tags: Interoperability, QoS, Provisioning, Tool, University Of Patras, Packet Network, Networking

White papers 2007-01-31

Quality of Service and Service Level Agreements

In order for advanced applications in modern computer networks to function satisfactorily, there is often the need for a guaranteed network performance and guaranteed values for several network parameters. When the provisioning and usage of network services is agreed, relevant specifications for the level of the services are also defined....

Tags: SLA, QoS, Network, University Of Patras, Service Level Management, Networking, It Operations, It service Management

White papers 2006-07-28

A Heuristic Strategy for IEEE 802.16 WiMAX Scheduler for Quality of Service

The advent of Broadband wireless promises quality communications over the wireless channel. The 802.16 standard is expected to arise as the main Broadband Wireless Access BWA Technology, providing high-speed data access to subscribers. In this paper, an important part of such a network, the MAC scheduler, is investigated. Although IEEE...

Tags: Strategy, QoS, Broadband Wireless, IEEE 802.16, Wireless, University Of Patras, WiMAX, Wireless And Mobility, Broadband Internet, Telecommunications

White papers 2006-06-15

TCP Vs. UDP Performance Evaluation for CBR Traffic on Wireless Multihop Networks

Multimedia applications over wireless networks become more and more demanding with respect to Quality of Service QoS and power consumption. As network behavior is a very important factor affecting the overall system performance, the protocol stack needs to be studied regarding Quality of Service QoS management. Power saving is another...

Tags: QoS, Network, TCP, UDP, Wireless, University Of Patras, Tcp/Ip, Networking

White papers 2006-04-13

Data Mining and Cryptology

This paper addresses the issue of mining encrypted data, in order to protect confidential information while permitting knowledge discovery. Common cryptographic algorithms are considered and their robustness against data mining algorithms is evaluated. Having identified robust cryptosystems, data are encrypted and well-known data mining techniques are applied on the encrypted...

Tags: University Of Patras, Data Mining, Business Intelligence, Marketing Research, Databases, Enterprise Software, Software, Data Management, Marketing

White papers 2003-06-01