1,044,001 research outputs found
The use of special exceptions in zoning practice
Thesis (M.C.P.) Massachusetts Institute of Technology. Dept. of Architecture, 1951.Bibliography: leaf 54.by Owen W. Burnham and Morris E. Johnson.M.C.P
Efficient and Effective Handling of Exceptions in Java Points-To Analysis
A joint points-to and exception analysis has been shown to yield benefits in both precision and performance. Treating exceptions as regular objects,
however, incurs significant and rather unexpected overhead. We show that in a
typical joint analysis most of the objects computed to flow in and out of a method
are due to exceptional control-flow and not normal call-return control-flow. For
instance, a context-insensitive analysis of the Antlr benchmark from the DaCapo
suite computes 4-5 times more objects going in or out of a method due to exceptional control-flow than due to normal control-flow. As a consequence, the
analysis spends a large amount of its time considering exceptions.
We show that the problem can be addressed both e
ectively and elegantly by
coarsening the representation of exception objects. An interesting find is that, instead of recording each distinct exception object, we can collapse all exceptions
of the same type, and use one representative object per type, to yield nearly identical precision (loss of less than 0.1%) but with a boost in performance of at least
50% for most analyses and benchmarks and large space savings (usually 40% or
more)
Review of script displays of African languages by current software
All recorded African languages that have a writing system have orthographies which use the Roman or Arabic scripts, with a few exceptions. Whilst Unicode successfully handles the encoding of both these scripts, current software, in particular web browsers, take little account of users wishing to operate in a minority script. Their use for displaying African languages has been limited by the availability of facilities and the desire to communicate with the ‘world’ through major languages such as English and French. There is a need for more use of the indigenous languages to strengthen their language communities and the use of the local scripts in enhancing the learning, teaching and general use of their own languages by their speaking communities
A Proposal for Dynamic Access Lists for TCP/IP Packet Filering
The use of IP filtering to improve system security is well established, and
although limited in what it can achieve has proved to be efficient and
effective.
In the design of a security policy there is always a trade-off between
usability and security. Restricting access means that legitimate use of the
network is prevented; allowing access means illegitimate use may be allowed.
Static access list make finding a balance particularly stark -- we pay the
price of decreased security 100% of the time even if the benefit of increased
usability is only gained 1% of the time.
Dynamic access lists would allow the rules to change for short periods of
time, and to allow local changes by non-experts. The network administrator can
set basic security guide-lines which allow certain basic services only. All
other services are restricted, but users are able to request temporary
exceptions in order to allow additional access to the network. These exceptions
are granted depending on the privileges of the user.
This paper covers the following topics: (1) basic introduction to TCP/IP
filtering; (2) semantics for dynamic access lists and; (3) a proposed protocol
for allowing dynamic access; and (4) a method for representing access lists so
that dynamic update and look-up can be done efficiently performed.Comment: 12 pages. Shortened version appeared in SAICSIT 200
Make Me Walk, Make Me Talk, Do Whatever You Please: Barbie and Exceptions
Barbie represents an aspiration to an ideal and also a never-ending mutability. Barbie is the perfect woman, and she is also grotesque, plasticized hyperreality, presenting a femininity exaggerated to the point of caricature. Barbie’s marketplace success, combined with (and likely related to) her overlapping and contradictory meanings, also allow her to embody some key exceptions to copyright and trademark law. Though Mattel’s lawsuits were not responsible for the initial recognition of those exceptions, they illuminate key principles and contrasts in American law. Mattel attempted to use both copyright and trademark to control the meaning of Barbie, reflecting a trend towards such overlapping claims. In order to ensure that their combined scope is no greater than the sum of their parts, both trademark and copyright defenses ought to be considered together. The Barbie cases highlight the problem that overlaps between the two regimes can challenge the very idea of IP boundaries, unless robust defenses exist against overclaiming
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