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Mar 9, 2000 - for shared symmetric key protocols also. Outgoing tests provide the authentication guarantees in the Needham-Schroeder-Lowe protocol.
Abstract. Many data mining algorithms make use of the well-known. Inclusion-Exclusion principle. As a consequence, using this principle ef- ficiently is crucial for ...
Apr 25, 2017 - The new method requires solving five linear systems per ... Keywords: nonlinear systems; iterative method; Newton's method; computational ...
the asymptotic cost of multiplication in optimal normal bases of type 2 ... Digital Signature Standard (2000)) to enable designers to deploy normal bases.
To illustrate this fact, let us compare with FDs: FDs are studied as a basic concept of databases since ... In this paper, a new data mining algorithm for computing unary. INDs is given. ..... Addison-Wesley, second edition, 1994. ... 8th Internation
aggregates with only a class of Mohs'Hardness (crushed aggregate) has been ... The more suitable choice of the Mohs'Hardness is carry out by Neuro-Fuzzy ...
Eddie O'Gorman*, Karl-Hermann Fuchs, Peter Tittmann, Heinz Gross and Theo ...... Shoubridge, E. A., Challiss, R. A. J., Hayes, D. J. and Radda G. K. (1985).
whole proposed LQG suboptimal algorithm, including the local Kalman filters. The remaining design parameters. (10) have been QL = diag{200, 10}, RL = 10, ...
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might be congenital, arising from cell nests remaining from the embryonal mammary ridge. An epidermal inclusion cyst in the breast may also be associated with ...
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Rio Scientific Center - IBM Brasil. P.O. Box 4624 .... We call the statement S[Y] E R[X] an incIusion de- ... Assume now that X is a key of R. We call the state- ...... grams from first-order formulasâ, Advances. D-Is1. [KPI. [LB]. M. [LMPI. Pal. [
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Having an XML inclusion constraint that extends the semantics of an IND is important in .... but not legal ones, whereas Ï.offer.course is a legal path. We also ...
The Grameen is perhaps the best-known example of these small- ... of the Grameen Bank has made microcredit a new model for poverty alleviation and.
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The idea behind security-by-contract is that a mobile application comes ... relationship, i.e. digital signatures on mobile code, then we can only reject or accept ...
ways than it has been. There is a dawning recognition of the important role that disability plays in the com- plex social, economic, and political environments of in ...
designed and implemented by Mark Jones (Jon92b). The main di erence is that ... Fortunately, Blott (Blo92) and Jones (Jon92a) have shown that in type systems ...
nisms in drug-allergic patients. To date, most BAT studies reported in the literature have used CD69 or CD203c as markers to quantify basophil activation after ...
Mar 19, 2006 - We collect and develop a set of benchmarks using trace monitoring ...... as a trace monitor: we look for a getConnection event with a given URL, ...
In many implementations this field can be merged with the dispatch data structure ...... kind may actually occur at runtime when new software components are ...
Efficient Type Inclusion Tests Jan Vitek R. Nigel Horspool Andreas Krall
Abstract A type inclusion test determines whether one type is a subtype of another. Efficient type testing techniques exist for single subtyping, but not for languages with multiple subtyping. To date, the only fast constant-time technique relies on a binary matrix encoding of the subtype relation with quadratic space requirements. In this paper, we present three new encodings of the subtype relation, the packed encoding, the bit-packed encoding and the compact encoding. These encodings have different characteristics. The bit-packed encoding delivers the best compression rates: on average 85% for real life programs. The packed encoding performs type inclusion tests in only 4 machine instructions. We present a fast algorithm for computing these encoding which runs in less than 13 milliseconds for PE and BPE, and 23 milliseconds for CE on an Alpha processor. Finally, we compare our results with other constant-time type inclusion tests on a suite of 11 large benchmark hierarchies.
1
Introduction
Many modern programming languages, particularly object-oriented ones, have been built around the notion of type conformance to allow for a form of polymorphism and code reuse. The idea is that, if a type A conforms to a type B , then A can be used in any context where B is expected. This notion is essential for the code inheritance advocated by most object-oriented languages. Conformance is usually summarized by a transitive, reflexive, anti-symmetric subtype relation (
