Managing the vast quantities of data generated in the context of information system security becomes more difficult every day. Visualisation tools are a solution to help face this challenge. They represent large quantities of data in a synthetic and often aesthetic way to help understand and manipulate them. In this document, we first present a classification of security visualisation tools according to each of their objectives. These can be one of three: monitoring (following events in real time to identify attacks as early as possible), analysis (the exploration and manipulation a posteriori of a an important quantity of data to discover important events) or reporting (representation a posteriori of known information in a clear and synthetic fashion to help communication and transmission). We then present ELVis, a tool capable of representing security events from various sources coherently. ELVis automatically proposes appropriate representations in function of the type of information (time, IP address, port, data volume, etc.). In addition, ELVis can be extended to accept new sources of data. Lastly, we present CORGI, an successor to ELVIS which allows the simultaneous manipulation of multiple sources of data to correlate them. With the help of CORGI, it is possible to filter security events from a datasource by multiple criteria, which facilitates following events on the currently analysed information systems.
Abstract Cladistic biogeography (also called vicariance biogeography) is concerned with the classification of patterns and processes of a changing Earth and its biota through geological time.
Summary Taxa of the small genus Anacyclus , centered in N.W. Africa, have very similar karyotypes (2n = 18), but Giemsa C‐banding reveals striking differences. Chemosystematic information mainly come from distinct flavonol and diosmetin O‐glycosylation patterns. Furthermore, morphological analyses according to the principles of Hennig (1966) are presented in cladogram form. Comparison of results obtained by such different methods is facilitated by similarity diagrams, which show good (but not complete) correspondence of the data‐sets. Chromosome C‐banding therefore appears to be a powerful new tool for karyosystematics in plants. Potentials for a synthetic systematic treatment of Anacyclus and an evolutionary interpretation of the various data are discussed.
Abstract Aim The aim of this paper was to revise the historical biogeographical method for resolving complicated distribution patterns through a technique that has come to be called assumption 2. Assumption 2 was used to resolve multiple areas on a single terminal branch (masts) as well as paralogous and missing areas in two or more areagrams. Recent examples, however, have shown that assumption 2 may be using rather than resolving paralogy. The paper attempts to resolve this problem by formulating a separate procedure to avoid using paralogous (redundant) area data in area cladistic analyses. Method The revision results in a new derivative method, the transparent method, to replace assumptions 1 and 2. It separates the procedures for resolving paralogy and for solving distribution patterns that occur in more than one area (masts). Results Several hypothetical examples show how the transparent method reduces paralogy and masts. The results show that paralogy can be reduced if the paralogy subtree method is applied after uncovering all possible relationships as single components on the terminals of areagrams. Conclusion The transparent method is a significant step forward in cladistic biogeography as it utilizes area relationships rather than generating general areagrams based on paralogous data.
THE DEVELOPMENT OF BIOLOGICAL SYSTEMATICS: ANTOINE‐LAURENT DE JUSSIEU, NATURE, AND THE NATURAL SYSTEM, by Peter F. Stevens. Columbia University Press, New York, ISBN 0–231–06440–3, US$65. CONTRIBUTIONS TO THE KNOWLEDGE OF POST‐PALEOZOIC NERITIC AND ARCHIBENTHAL SPONGES (PORIFERA). The stratigraphic record, ecology, and global distribution of intermediate and higher taxa by Felix Wiedenmayer. Schweizerische Palaontologische Abhandlungen, vol. 116, 1994, 147 pp. ISSN: 0080–7389, Basel/ Swizerland, hardback SFr. 132. MARINE PALAEOENVIRONMENTAL ANALYSIS FROM FOSSILS, edited by Dan W. J. Bosence and Peter A. Allison. Geological Society Special Publication No. 83, The Geological Society, London 1995, 272 pp. ISBN 1–897799–21–7. Hardback £ 39. INTERPRETING THE HIERARCHY OF NATURE: FROM SYSTEMATIC PATTERNS TO EVOLUTIONARY PROCESSES THEORIES, edited by Lance Grande and Olivier Rieppel. Academic Press, San Diego 1994. 298pp. ISBN 0–12–295120–4. Hardback. $59.95. ISLAND BRITAIN; A QUATERNARY PERSPECTIVE, edited by Preece, R. C. Geological Society Special Publication 96, 1995. ISBN 1–897799–40–3. Price US $93/ £56. Members of the Geological Society may purchase this volume for US $48/£29
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