Le culture slave nei periodici italiani fra le due guerre (1918-1940)

Il periodo storico compreso fra le due guerre mondiali è particolarmente interessante per osservare lo sviluppo in Italia di un crescente interesse nei confronti delle culture slave. Negli ultimi anni sono state diverse le iniziative culturali, tra convegni e pubblicazioni scientifiche, dedicate a tale filone di studi, che hanno contribuito ad inquadrare il fenomeno e ad apprezzarne la portata sia all’interno dello specifico ambito accademico, sia come parte integrante della cultura italiana dell’epoca. Il presente lavoro ha cercato di fornire nuovi spunti di analisi per la definizione dei rapporti tra gli studi slavistici e la cultura italiana attraverso lo studio di oltre quaranta periodici, d’interesse principalmente storico-letterario, di cui è stato fatto lo spoglio sistematico dei singoli contributi (articoli, saggi, recensioni, segnalazioni bibliografiche) nell’arco di tempo compreso tra il 1918 e il 1940

A new combination in Leontodon (Asteraceae, Cichorieae).

A new species-level combination, Leontodon albanicus comb. & stat. nov., is proposed on the basis of a subspecies described from Albania. The species is reported here as new to Greece. The variability of the taxon has been examined and a new morphological description has been provided. Its relationship with the closest taxa is also discussed

Know Your Enemy: Stealth Configuration-Information Gathering in SDN

Software Defined Networking (SDN) is a network architecture that aims at providing high flexibility through the separation of the network logic from the forwarding functions. The industry has already widely adopted SDN and researchers thoroughly analyzed its vulnerabilities, proposing solutions to improve its security. However, we believe important security aspects of SDN are still left uninvestigated. In this paper, we raise the concern of the possibility for an attacker to obtain knowledge about an SDN network. In particular, we introduce a novel attack, named Know Your Enemy (KYE), by means of which an attacker can gather vital information about the configuration of the network. This information ranges from the configuration of security tools, such as attack detection thresholds for network scanning, to general network policies like QoS and network virtualization. Additionally, we show that an attacker can perform a KYE attack in a stealthy fashion, i.e., without the risk of being detected. We underline that the vulnerability exploited by the KYE attack is proper of SDN and is not present in legacy networks. To address the KYE attack, we also propose an active defense countermeasure based on network flows obfuscation, which considerably increases the complexity for a successful attack. Our solution offers provable security guarantees that can be tailored to the needs of the specific network under consideratio

Catalytic micro-device for methane combustion: a study on kinetics and fluid-dynamic.

Some kind of remote power application require to be free of acoustic and vibration noise as well as independent from sunlight. Such requirements can be satisfied by a catalytic microcombustor coupled with a thermoelectric generator. For this reason a complete kinetical study of a Pd catalyst supported by Ceria-zirconia and by LaMn perovskites was made and the kinetical equations obtained were used to build a CFD model of a microcombustor device. This thesis discusses also the swich on - swich off phemomena taking place in the simplified 2D cylindrical and in the full 3d models explaining them as heat holding properties of the materials employed

LineSwitch: Efficiently Managing Switch Flow in Software-Defined Networking while Effectively Tackling DoS Attacks

Software Defined Networking (SDN) is a new networking architecture which aims to provide better decoupling between network control (control plane) and data forwarding functionalities (data plane). This separation introduces several benefits, such as a directly programmable and (virtually) centralized network control. However, researchers showed that the required communication channel between the control and data plane of SDN creates a potential bottleneck in the system, introducing new vulnerabilities. Indeed, this behavior could be exploited to mount powerful attacks, such as the control plane saturation attack, that can severely hinder the performance of the whole network. In this paper we present LineSwitch, an efficient and effective solution against control plane saturation attack. LineSwitch combines SYN proxy techniques and probabilistic blacklisting of network traffic. We implemented LineSwitch as an extension of OpenFlow, the current reference implementation of SDN, and evaluate our solution considering different traffic scenarios (with and without attack). The results of our preliminary experiments confirm that, compared to the state-of-the-art, LineSwitch reduces the time overhead up to 30%, while ensuring the same level of protection.Comment: In Proceedings of the 10th ACM Symposium on Information, Computer and Communications Security (ASIACCS 2015). To appea

Alyssum desertorum Stapf (Brassicaceae), new for the Italian flora

The occurrence of Alyssum desertorum, a species belonging to A. sect. Alyssum, is reported for the first time in Italy. It was found in Abruzzo (central Italy) in the territory of National Park of Gran Sasso and Laga mountains and surrounding areas. Morphological similarities with the other taxa recorded in Italy belonging to A. sect. Alyssum are briefly discussed. Information about the typification of the name, habitat, phenology and distribution in Italy are also provided

Linearons: highly non-instantaneous solitons in liquid-core photonic crystal fibers

The nonlinear propagation of light pulses in liquid-filled photonic crystal fibers is considered. Due to the slow reorientational nonlinearity of some molecular liquids, the nonlinear modes propagating inside such structures can be approximated, for pulse durations much shorter than the molecular relaxation time, by temporally highly-nonlocal solitons, analytical solutions of a linear Schroedinger equation. The physical relevance of these novel solitary structures, which may have a broad range of applications, is discussed and supported by detailed numerical simulations.Comment: 4 pages, 3 figure