Computing and Information Systems - Research Publications

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End date: 2007 × Type: Journal Article × Subject: Information Systems ×

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Now showing 1 - 10 of 25
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    Comparative analysis of long DNA sequences by per element information content using different contexts
    Dix, TI ; Powell, DR ; Allison, L ; Bernal, J ; Jaeger, S ; Stern, L (BMC, 2007)
    BACKGROUND: Features of a DNA sequence can be found by compressing the sequence under a suitable model; good compression implies low information content. Good DNA compression models consider repetition, differences between repeats, and base distributions. From a linear DNA sequence, a compression model can produce a linear information sequence. Linear space complexity is important when exploring long DNA sequences of the order of millions of bases. Compressing a sequence in isolation will include information on self-repetition. Whereas compressing a sequence Y in the context of another X can find what new information X gives about Y. This paper presents a methodology for performing comparative analysis to find features exposed by such models. RESULTS: We apply such a model to find features across chromosomes of Cyanidioschyzon merolae. We present a tool that provides useful linear transformations to investigate and save new sequences. Various examples illustrate the methodology, finding features for sequences alone and in different contexts. We also show how to highlight all sets of self-repetition features, in this case within Plasmodium falciparum chromosome 2. CONCLUSION: The methodology finds features that are significant and that biologists confirm. The exploration of long information sequences in linear time and space is fast and the saved results are self documenting.
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    Managing Outsourcing: The Life Cycle Imperative
    CULLEN, SK ; SEDDON, PB ; WILLCOCKS, L ( 2005)
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    Decoding prefix codes
    Liddell, M ; Moffat, A (WILEY-BLACKWELL, 2006-12)
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    On incorporating differentiated levels of network service into GridSim
    Sulistio, A ; Poduval, G ; Buyya, R ; Tham, C-K (ELSEVIER, 2007-05)
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    Patterns based classifiers
    Ramamohanarao, K ; Fan, H (SPRINGER, 2007-03)
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    Block Merging for Off-Line Compression
    WAN, R. ; MOFFAT, A. ( 2007)
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    Survey of network-based defense mechanisms countering the DoS and DDoS problems
    Peng, T ; Leckie, C ; Ramamohanarao, K (ASSOC COMPUTING MACHINERY, 2007-04)
    This article presents a survey of denial of service attacks and the methods that have been proposed for defense against these attacks. In this survey, we analyze the design decisions in the Internet that have created the potential for denial of service attacks. We review the state-of-art mechanisms for defending against denial of service attacks, compare the strengths and weaknesses of each proposal, and discuss potential countermeasures against each defense mechanism. We conclude by highlighting opportunities for an integrated solution to solve the problem of distributed denial of service attacks.
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    Automatic acquisition of qualia structure from corpus data
    Yamada, I ; Baldwin, T ; Sumiyoshi, H ; Shibata, M ; Yagi, N (IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, 2007-10)