23,650 research outputs found
Luce e tenebre nei veli di Robert Morris
No full textIl contributo – redatto per il catalogo dell’esposizione dedicata alle realizzazioni conclusive della vita di Robert Morris, che si è tenuta alla Galleria Nazionale d’Arte Moderna e Contemporanea di Roma a un anno di distanza dalla morte dello scultore (15 ottobre 2019 al 3 marzo 2020) – indaga la dimensione “velo” all’interno delle due installazioni che l’artista americano ha realizzato nel 2015 e nel 2018. Le numerose sculture che compongono le due installazioni sono impronte, ottenute disponendo su manichini opportunamente modellati tela di lino e fibra di carbonio, che la resina epossidica “solidifica” facendole diventare “veli” autoportanti una volta che il manichino viene tolto. Lo studio, inoltre, focalizza l’attenzione sulla forte dimensione passionale che queste sculture-veli sono in grado di veicolare e sulla loro capacità di creare una costellazione con esempi cardine della storia dell’arte del passato, come ad esempio con le statue di piangenti in alabastro che formavano il corteo funebre disposto intorno alla tomba di Filippo l’Ardito, duca di Borgogna, realizzate da Claus Sluter nel primo quarto del Quattrocento
Recensione M. Biscuso, Leopardi tra i filosofi: Spinoza, Vico, Kant, Nietzsche
No full textMorris Karp
Uscito per i tipi di La Scuola di Pitagora nel 2019, Leopardi tra i filosofi: Spinoza, Vico, Kant, Nietzsche di Massimiliano Biscuso viene ad arricchire il paesaggio degli studi leopardiani dell’ultimo decennio, a cui offre alcune indicazioni di merito e di metodo. Il libro si colloca all’interno di un percorso di ricerca che ha spinto l’autore a dare già diversi contributi alla critica leopardiana, e in particolare si pone in stretto rapporto con un’altra sua pubblicazione uscita nel corso dello stesso anno per la Manifestolibri, Gli usi di Leopardi. Figure del leopardismo filosofico italiano. Come Biscuso spiega nell’introduzione, mentre Leopardi tra i filosofi vuole studiare principalmente il modo in cui Leopardi «elabora la propria visione del mondo dialogando e discutendo con gli altri pensatori, confrontandosi con le loro teorie, riprendendone, sviluppandone o criticandone le proposte» (p. 9), Gli usi di Leopardi si concentra sul modo nel quale il pensiero di Leopardi «è stato recepito e interpretato dai filosofi successivi» (ibidem
Communication issues in Large Scale Wireless Ad hoc Networks
No full textAd-hoc networks are networks that are formed automatically without any pre-existing infrastructure. These networks may consist of various types of mobile devices . such as PDAs, laptops, cell phones and other mobile computing devices. Each node in a wireless ad hoc network performs computational tasks as well as communication routing. Without the existence of dedicated routing devices, the nodes relay traffic to each other to extend their communication range. This paper gives an overview on the current technologies . intelligent agent systems . and their implications to solve common problems in ad hoc networks. We will also introduce our current research directions, and provide a promising analysis to achieve efficient transmissions in a large-scale ad hoc network using multiple channels, an option, which is already in the MAC layer of IEEE 802.11. We will show also that in noisy environments latency reduction in multi-hops is significant to single hop networks even for greater number of relay nodes. The approach described in this paper could be use to develop efficient large-scale ad hoc networks
Quorum based geographically static data storage in ad-hoc networks
No full textLarge-scale wireless ad-hoc networks are formed automatically and allow nodes to communicate over greater distances. Every node acts as a router forming a complex network, which is simplified by the use of geodesic routing. However, a method to discover a node.s location is needed for geodesic routing. In this paper we propose two algorithms which could support location servers in ad-hoc networks and examine their performance
Link stability estimation based on link connectivity changes in mobile ad-hoc networks
No full textDear Wang,
Re: Link Stability Estimation Based on Link Connectivity Changes in Mobile Ad-hoc Networks
I have not been able to assess if this is an author version peer-reviewed or is it an author version non peer reviewed. Could you please clarify this so I can proceed to add your paper to Spiral. Spiral digital repository only accept peer-reviewed papers.
30/11/12 author has confirmed peer reviewe
Cooperation enforcement in ad-hoc wireless networks
No full textIncludes bibliographical references.Ad-hoc networks consist of a system of wireless nodes that can freely and dynamically self-organise into a working network topology. This allows people to internetwork seamlessly in areas that have no preexisting communication infrastructure. Nodes are expected to forward the traffic of other nodes in order for the packets to reach their final destination. It is envisaged that community ad-hoc networks will become widespread in the near future, as they require no administrative support. Nodes will be able to enter and leave the network as they choose. An unfortunate result is that in an open multi-agent system such as this, the role-players tend to be unreliable and self-interested
Mobile Ad Hoc Networks: the DHT paradigm
No full textIn this thesis, the adoption of the hierarchical routing paradigm to achieve a scalable network layer for ad hoc networks has been proposed. The main concept of hierarchical routing is to keep, at any node, complete routing information about nodes which are close to it and lesser information about nodes located further away.
The Augmented Tree-based Routing protocol, a routing protocol for ad hoc networks exploiting both a location-aware addressing schema and a distribute hash table (DHT) system, has been proposed. The adopted addressing schema allows nodes to adopt hierarchical routing, limiting so the overhead introduced in the network, while the DHT system provides the mapping between transient identifiers and node identities.
Since the Augmented Tree-based Routing protocol adopts a multi-path strategy and since most studies in the area of multi-path routing focus on heuristic methods and the performances of these strategies are commonly evaluated by numerical simulations, an analytical framework to evaluate the performance gain achieved by multi-path routing has been proposed. The framework
is based on on graph theory and on terminal-pair routing reliability (TPRR) as performance measure.
Moreover, some features of the proposed protocol has been exploited design a peer-to-peer (P2P) system over a mobile ad hoc network (MANET) resorting to a cross-layer approach. It has been proved that simply deploying P2P systems over MANETs may cause poor performances. By coupling both the direct and the indirect key-based routing at the network layer and by resorting to the same hierarchical address space structure of ATR, we are able to build a P2P overlay network in which the logical proximity agrees with the physical one, limiting so the message overhead and avoiding the redundancy.
Finally, by extending the proposed location-aware addressing to match with the opportunistic forwarding protocol, a novel routing protocol for disruption tolerant network (DTN) and delay tolerant network (DTN) has been proposed. By exploiting both the temporal diversity and the broadcast nature of the wireless propagation, such a protocol can enable connectivity in ad hoc environments characterized by non stationary wireless propagation as well as sparse topologies
Adman' Author Visits
No full textPhotograph used for a story in the Daily Oklahoman newspaper. Caption: "Russ Pate, columnist for Adweek and author of "Adman, Morris Hite's Methods for Winning the Ad Game," attended a reception at the Nichols Hills Executive Center recently where he autographed books and visited with members of the Oklahoma City advertising industry.
Self organizing quorum systems for ad hoc networks
No full textThere are many essential applications for quorum systems in ad-hoc networks, such as that of location servers in large-scale networks. Existing research proposes many approaches to the problems, many of which are incomplete, cumbersome, or incur significant cost. We describe and analyse a self-organising quorum system that creates an emergent intelligence to minimise overhead and maximise survivability. We then examine the quorum.s performance as a location server and suggest improvements to the query mechanism and routing algorithm using the information
Bridging distributed hash tables in wireless ad-hoc networks
No full textThe adaptation of structured P2P networks, i.e.
Distributed Hash Tables (DHTs), to wireless ad-hoc networks has
been investigated in recent years. Existing work assume all peers
would come to an agreement on establishing one uniform DHT
across the entire network. However, in reality, there isn’t a defacto
standard of DHT implementation, different DHTs co-exist.
We present a novel protocol, known as the DHT-gatewaying
model, which enables cross-DHT searching between multiple
DHTs of different implementations
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