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This paper presents the URBAN XOR1 protocol, an XOR-based flat routing mechanism developed for vehicular ad hoc networks (VANETs) formed in urban scenarios. The paper firstly describes the URBAN_XOR routing principle, which requires reduced knowledge about the set of nodes present in the VANET in order to provide traffic forwarding. Basically, the URBAN XOR protocol introduces the concept of local...
In recent years the behavior of the parcel delivery market has undergone significant changes influenced by increased competitiveness, concern with the environment, electronic commerce, the increase in the number of customers, reducing the size of applications; expansion of the collection sites and distribution, increasing the flow of urban vehicles, increasing fleet; complexity of the operations of...
The IEEE 802.11s draft standard defines a mesh network in which frame delivery is done by forwarding the frame through nodes, called Mesh Points (MPs). To make this possible, it specifies two routing protocols: HWMP and RA-OLSR. Both protocols suffer from scalability issues caused by the use of broadcast messages for discovery and update of routes. In this work, we propose a new routing protocol,...
Topological worms, such as those that propagate by following links in an overlay network, have the potential to spread faster than traditional random scanning worms because they have knowledge of a subset of the overlay nodes, and choose these nodes to propagate themselves; and also because they can avoid traditional detection mechanisms. Furthermore, this worm propagation strategy is likely to become...
Peer-to-peer overlays envision a single overlay substrate that can be used (possibly simultaneously) by many applications, but current overlays either target fast, few-hop lookups for contacting directly the responsible nodes, or slower multi-hop lookups that can be used by applications that exploit the overlay topology (like multicast or anycast). In this paper we present Pastel, an extension to...
This study deals with the development of Chromium Aluminium Nitride (CrAlN) hard coatings (by varying the nitrogen content in the plasma, the target bias voltage, the working pressure and the deposition time) and their characterization by physical and mechanical techniques (XRD, nanoindentation, Young's modulus, stress, scratch-test, composition, etc.) in order to determine the optimal deposition...
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