We study a class of models, known as overlay optimization problems, with a "base" subproblem and an "overlay" subproblem, linked by the requirement that the overlay solution be contained in the base solution. In some telecommunication settings, a feasible base solution is a spanning tree and the overlay solution is an embedded Steiner tree (or an embedded path). For the general overlay optimiza...

Grapes are one of the world’s most widely distributed crops and cultivated in more than 100 countries global scheme. Due to climate change improper vine growth variable selection, production has significantly decreased across countries. Therefore, primary purpose this study was develop a land suitability analysis method using fuzzy expert system at regional scale. The membership function used A...

Overlay networks have emerged as a fundamental technique for efficient data dissemination. Current overlay construction techniques typically face a number of limitations, including: i) limited scalability because of reliance upon global knowledge, and ii) performance characteristics targeting the requirements of a particular class of applications. In this paper, we propose dynamically organizin...

Due to the growing demand for high definition music and video content, an overlay multicasting providing live streaming services has been gaining popularity over last years. In this paper, we focus on applying the overlay multicasting for delivering of critical data that require to be transmitted safely, intact and with as little delay as possible, e.g., financial data, software security patche...

Multicast can be done on link layer, IP layer, and application layer respectively. The application level overlay multicast is easier to deploy as compared to non overlay multicast but at the cost of efficiency. However, the utilization of these approaches is limited by current Internet architecture. Overlay and non overlay integrated solution have not yet been proposed for hybrid networks. In t...

This paper addresses the problem of building scalable semantic overlay networks. Our approach follows the principle of data independence by separating a logical layer, the semantic overlay for managing and mapping data and metadata schemas, from a physical layer consisting of a structured peer-to-peer overlay network for efficient routing of messages. The physical layer is used to implement var...

In this paper, we address the challenge of overlay topology design by considering which overlay topology best minimizes cost function, taking into account overlay link creation cost and routing cost. First, we formulate the problem as Integer Linear Programming (ILP) given a traffic matrix and assuming cooperative behavior of nodes. Then, we propose some heuristics to find near-optimal overlay ...

Several recently emerged Internet services make use of application-level or overlay networks. Examples of such services include overlay multicast, structured peer-topeer lookup services, and peer-to-peer file sharing. Many of these services could benefit from enabling participating end hosts to estimate their relative network locations within the overlay. In this thesis, we present PCoord, a pe...