CAIR: Using Formal Languages to Study Routing, Leaking, and Interception in BGP

The Internet routing protocol BGP expresses topological reachability and policy-based decisions simultaneously in path vectors. A complete view on the Internet backbone routing is given by the collection of all valid routes, which is infeasible to obtain due to information hiding of BGP, the lack of omnipresent collection points, and data complexity. Commonly, graph-based data models are used to represent the Internet topology from a given set of BGP routing tables but fall short of explaining policy contexts. As a consequence, routing anomalies such as route leaks and interception attacks cannot be explained with graphs. In this paper, we use formal languages to represent the global routing system in a rigorous model. Our CAIR framework translates BGP announcements into a finite route language that allows for the incremental construction of minimal route automata. CAIR preserves route diversity, is highly efficient, and well-suited to monitor BGP path changes in real-time. We formally derive implementable search patterns for route leaks and interception attacks. In contrast to the state-of-the-art, we can detect these incidents. In practical experiments, we analyze public BGP data over the last seven years

On-Farm Mortality in Cattle

The present study was aimed at exploring if and on what extent on-farm mortality, which is regularly notified in national cattle databases in the EU, could be used to design an early warning system for emerging diseases in cattle. The statistical analysis of mortality rates recorded in Italy in 2008 showed a clear influence by transport, age, sex and season. Through spatial and spatio-clustering methods several geographic area with exceptionally high mortality rates were detected. A more in-dept analysis of individual causes of mortality in the Provinces of Trento and Bolzano showed that on-farm mortality was greatly influenced by management practices and economic conditions. In order to control some of the influencing management factors a model was created to compare for a given population the actual and expected mortality rates. A conclusion of the study was that on-farm mortality regularly notified in national livestock databases could represent an important indicator for evaluating herd management practices. Further analysis and refinement of the applied models would be needed in order to establish a robust method for the detection of anomalous events with respect to the outbreak of animal diseasesJRC.DG.G.7-Traceability and vulnerability assessmen

Versuch einer generellen psychischen Heilmethode

http://tartu.ester.ee/record=b1973232~S1*es

Pädagogische Andeutungen, den Schriften des classischen Alterthums, entlehnt und ins Deutsche übertragen : Einladungsschrift zum öffentlichen Examen in der Revalschen Kreisschule am 30. Juni 1838

https://www.ester.ee/record=b4008924*es

Kiri tundmatule

Blühdorn, Johann Ernst, 1767-1842, saksa vaimulikJuriidilised ja finantsküsimuse

Des römischen Geschichtschreibers Titus Livius Erzählung von der Veranlassungzum zum zweiten punischen Kriege : Einladungsschrift zum öffentlichen Examen in der Revalschen Kreisschule, am 18. Dec. 1844

https://www.ester.ee/record=b3891674*es

Rede, gehalten bei dem öffentlichen Examen in der Revalschen Kreisschule, am 18. December 1843

https://www.ester.ee/record=b3889391*es

Dilucidatio declarationis ex parte nobilium Curlandiae adcitatorum die 6ta novembris anni currentis exhibitae = Beleuchtung der von Seiten des citirten Curländischen Adels den 6ten November, a. c. exhibirten Declaration

TÜR-i eksemplari R Est.A-14256 (konvoluut) 21. alligaathttp://tartu.ester.ee/record=b2418563~S1*es