Adaptive routing in active networks

New conceptual ideas on network architectures have been proposed in the recent past. Current store-andforward routers are replaced by active intermediate systems, which are able to perform computations on transient packets, in a way that results very helpful for developing and deploying new protocols in a short time. This paper introduces a new routing algorithm, based on a congestion metric, and inspired by the behavior of ants in nature. The use of the Active Networks paradigm associated with a cooperative learning environment produces a robust, decentralized algorithm capable of adapting quickly to changing conditions

Soil consumption by urbanisation: a case study in northern Sardinia (Italy)

The aim of this short communication is to present a case study of competition between urbanisation, environment and agriculture for the Alghero municipality, a coastal Mediterranean area where a high urban growth has taken place during the last 50 years

Big Data Analytics for QoS Prediction Through Probabilistic Model Checking

As competitiveness increases, being able to guaranting QoS of delivered services is key for business success. It is thus of paramount importance the ability to continuously monitor the workflow providing a service and to timely recognize breaches in the agreed QoS level. The ideal condition would be the possibility to anticipate, thus predict, a breach and operate to avoid it, or at least to mitigate its effects. In this paper we propose a model checking based approach to predict QoS of a formally described process. The continous model checking is enabled by the usage of a parametrized model of the monitored system, where the actual value of parameters is continuously evaluated and updated by means of big data tools. The paper also describes a prototype implementation of the approach and shows its usage in a case study.Comment: EDCC-2014, BIG4CIP-2014, Big Data Analytics, QoS Prediction, Model Checking, SLA compliance monitorin

Il Periodo sabaudo

Studio sul periodo sabaudo in Sardegna: feudi e città, la "villa" e la "viddazzone", lo sviluppo della popolazione e la rivolta antifeudale

Follicular size affects the meiotic competence of in vitro matured prepubertal and adult oocytes in sheep

Non-atretic follicles dissected from prepubertal and adult ovaries were allocated in three groups: a) < 1 mm; b) 1-2 mm; c) > 2 mm. After 24 h of maturation, a lower percentage of adult oocytes from group a (P < 0.01) reached metaphase II than those from groups b and c (70.4 versus 89.5 and 95.5). Prepubertal oocytes showed similar results (P < 0.01; 27.2 versus 79.8 and 81.8). There was a significant difference (P < 0.01) in meiotic progression between prepubertal and adult oocytes of < 1 mm follicles. The diameter of prepubertal oocytes derived from group a was significantly lower (P < 0.01) compared to groups b and c (138.1 versus 142.1 and 145.6); adult oocytes showed similar results (P < 0.01; 142.2 versus 157.2 and 158.1 Oocytes with the same diameter derived from different follicles of prepubertal and adult ovaries showed similar meiotic progression rates. Des follicules non-atrétiques sélectionnés à partir d’ovaires d’ovins prépubères et adultes ont été répartis en trois groupes selon leur diamètre : a) < 1 mm ; b) 1-2 mm ; c) > 2 mm. Après 24 h de maturation les ovocytes dérivant des ovaires d’animaux adultes appartenant au groupe a ont atteint la MII dans des pourcentages nettement inférieurs (p < 0,01) à ceux observés pour les groupes b et c (70,4 versus 89,5 et 95,5). Des résultats identiques ont été obtenus avec les ovocytes provenant d’animaux prépubères (p < 0,01 ; 27,2 versus 79,8 et 81,8). Une grande différence (p < 0,01) dans le potentiel à reprendre la méiose existe entre les ovocytes de prépubères et des adultes provenant de follicules < 1 mm. Le diamètre des ovocytes d’agneaux provenant de follicules du groupe a était nettement inférieur (p < 0,01 ) par rapport à ceux provenant de follicules des groupes b ou c (138,1 versus 142,1 et 145,6). Des résultats identiques ont été observés pour les ovocytes provenant d’animaux adultes (p < 0,01, 142,2 versus 157,2 et 158,1). Des ovocytes de même diamètre provenant d’ovaires de prépubères et d’adultes ne diffèrent pas dans leur aptitude à reprendre la méiose

La Pesca del corallo tra alti profitti e progetti inattuati (sec. XVIII)

Questo lavoro evidenzia l'importanza della pesca del corallo non solo a livello locale e regionale, ma nell'intera area mediterranea. Da questa e da altre numerose pubblicazioni emerge l'importanza della Sardegna in questa caratteristica pesca: si tratta di una vera e propria centralità derivante dalla qualità e dall'abbondanza del prodotto. L'importanza delle sue zone di pesca fece per secoli dell'isola il punto di riferimento di quel vasto complesso di interessi che, superando i contingenti egoismi regionali, trasformò il Mediterraneo ed i suoi porti in un mare aperto agli scambi, ai contatti, alle influenze di popoli spesso diversi; una vera e propria zona franca che mostra questo mare ed i paesi che si affacciano sulle sue rive come un'entità unitaria, inscindibile pur negli inevitabili contrasti