http://pdfcast.org/rss/cat/computer-internet en-us years. As a discipline and as a practice, it has become more and
more complex. In software projects new requirements are
continuously issued and the objective of the requirement
management is to elicit, manage and prioritize requirements. In
the present study, a specific requirement management process is
simulated. The stochastic parameters of the proposed system
with specific system boundaries under a given environment have
been estimated using event to event simulation. The present
study will yield realistic results which are very near to the
functioning of the live system. Based on results from simulation,
conditions that result in an overload situation are identified.
Simulation is also used to find process change proposals.
]]> http://pdfcast.org/pdf/potential-effect-of-creeping-user-requirements-on-project-management-a-simulation-approach Mon, 08 Mar 2010 07:32:53 -0500 http://pdfcast.org/pdf/potential-effect-of-creeping-user-requirements-on-project-management-a-simulation-approach Computer / Internet evaluation of two Asynchorous Transfer
Mode (ATM) scheduler strategies, static
bandwidth allocation with and without
heuristic approach are presented. Several
experiments were carried out by using the
ON-OFF distribution source model based on
the ATM Various Bit Rate (VBR) service
category. The strategy with the heuristic
approach improves the buffer cell loss ratio
(CLR) performance significantly. Several
numerical results are presented to show the
effects of the heuristic approach to
bandwidth allocation. ]]> http://pdfcast.org/pdf/atm-switch-impact-of-heuristic-approach-to-static-bandwidth-allocation Mon, 08 Mar 2010 06:46:35 -0500 http://pdfcast.org/pdf/atm-switch-impact-of-heuristic-approach-to-static-bandwidth-allocation Computer / Internet http://pdfcast.org/pdf/can-we-learn-to-beat-the-best-stock Tue, 23 Feb 2010 20:43:34 -0500 http://pdfcast.org/pdf/can-we-learn-to-beat-the-best-stock Computer / Internet http://pdfcast.org/pdf/change-management-environments-policies-procedures Fri, 12 Feb 2010 10:08:34 -0500 http://pdfcast.org/pdf/change-management-environments-policies-procedures Computer / Internet calculate the frequency dependent series impedance matrix of an
overhead transmission line. A novel approach is proposed, leading from
FEM results to the direct computation of the symmetrical components
impedance matrix of any single or double circuit transmission line.
Results show excellent agreement with those obtained by classical
computation methods. Test cases examined include impedance
calculations in the presence of certain terrain irregularities in the line
neighborhood, such as line by a mountain side of variable slope, line
inside a canyon or line near a water region.]]> http://pdfcast.org/pdf/calculation-of-overhead-transmission-line-impedances-a-finite-element-approach Thu, 11 Feb 2010 00:32:10 -0500 http://pdfcast.org/pdf/calculation-of-overhead-transmission-line-impedances-a-finite-element-approach Computer / Internet counting, bandwidth provisioning and detecting DoS at-
tacks. These applications see the traffic as a collection of
flows they need to measure. As link speeds and the number
of flows increase, keeping a counter for each flow is too ex-
pensive (using SRAM) or slow (using DRAM). The current
state-of-the-art methods (Cisco’s sampled NetFlow) which
log periodically sampled packets are slow, inaccurate and
resource-intensive. Previous work showed that at different
granularities a small number of “heavy hitters” accounts for
a large share of traffic. Our paper introduces a paradigm
shift for measurement by concentrating only on large flows
— those above some threshold such as 0.1% of the link ca-
pacity.
We propose two novel and scalable algorithms for iden-
tifying the large flows: sample and hold and multistage fil-
ters, which take a constant number of memory references per
packet and use a small amount of memory. If M is the avail-
able memory, we show analytically that the errors of our new
algorithms are proportional to 1/M; by contrast, the error
of an algorithm based on classical sampling is proportional
to 1/
?
M, thus providing much less accuracy for the same
amount of memory. We also describe further optimizations
such as early removal and conservative update that further
improve the accuracy of our algorithms, as measured on re-
al traffic traces, by an order of magnitude. Our schemes
allow a new form of accounting called threshold accounting
in which only flows above a threshold are charged by usage
while the rest are charged a fixed fee. Threshold accounting
generalizes usage-based and duration based pricing.
]]> http://pdfcast.org/pdf/new-directions-in-traffic-measurement-and-accounting Wed, 10 Feb 2010 04:08:09 -0500 http://pdfcast.org/pdf/new-directions-in-traffic-measurement-and-accounting Computer / Internet http://pdfcast.org/pdf/horizontal-decomposition-of-prevayler Mon, 08 Feb 2010 10:56:14 -0500 http://pdfcast.org/pdf/horizontal-decomposition-of-prevayler Computer / Internet http://pdfcast.org/pdf/the-java-generic-programming-system Mon, 08 Feb 2010 10:40:00 -0500 http://pdfcast.org/pdf/the-java-generic-programming-system Computer / Internet in Java. The notion of generic programming that motivated the design of the Standard Template Library (STL) advocates a broader definition: a programming paradigm for designing and developing reusable and efficient collections of algorithms. The functional programming community uses the term as asynonym for polytypic and type-indexed programming, which involves designing functions that operate on data-types having certain algebraic structures. This paper aims at analyzing core mathematical notions at the foundations of rational approaches to generic programming and library design as reasoned and principled activity. We relate several methodologies used and studied in the imperative and functional programming communities. As a necessary step, we provide abase for common understanding of techniques underpinning generic software components and libraries, and their construction, not limited to a particular linguistic support.]]> http://pdfcast.org/pdf/what-is-generic-programming Mon, 08 Feb 2010 10:39:04 -0500 http://pdfcast.org/pdf/what-is-generic-programming Computer / Internet http://pdfcast.org/pdf/a-comparative-study-of-language-support-for-generic-programming Mon, 08 Feb 2010 10:30:43 -0500 http://pdfcast.org/pdf/a-comparative-study-of-language-support-for-generic-programming Computer / Internet http://pdfcast.org/pdf/klassen-im-fokus-der-kantor Sat, 06 Feb 2010 21:25:14 -0500 http://pdfcast.org/pdf/klassen-im-fokus-der-kantor Computer / Internet http://pdfcast.org/pdf/test4pass-74-924exam-study-guides-trainning-materials Tue, 02 Feb 2010 03:24:31 -0500 http://pdfcast.org/pdf/test4pass-74-924exam-study-guides-trainning-materials Computer / Internet http://pdfcast.org/pdf/test4pass-70-643exam-study-guides-trainning-materials Tue, 02 Feb 2010 03:23:10 -0500 http://pdfcast.org/pdf/test4pass-70-643exam-study-guides-trainning-materials Computer / Internet http://pdfcast.org/pdf/test4pass-70-642exam-study-guides-trainning-materials-1 Tue, 02 Feb 2010 03:21:45 -0500 http://pdfcast.org/pdf/test4pass-70-642exam-study-guides-trainning-materials-1 Computer / Internet http://pdfcast.org/pdf/test4pass-70-640exam-study-guides-trainning-materials Tue, 02 Feb 2010 03:19:48 -0500 http://pdfcast.org/pdf/test4pass-70-640exam-study-guides-trainning-materials Computer / Internet http://pdfcast.org/pdf/test4pass-70-622exam-study-guides-trainning-materials-1 Tue, 02 Feb 2010 03:17:43 -0500 http://pdfcast.org/pdf/test4pass-70-622exam-study-guides-trainning-materials-1 Computer / Internet http://pdfcast.org/pdf/test4pass-70-561exam-study-guides-trainning-materials Tue, 02 Feb 2010 03:15:58 -0500 http://pdfcast.org/pdf/test4pass-70-561exam-study-guides-trainning-materials Computer / Internet http://pdfcast.org/pdf/test4pass-70-549exam-study-guides-trainning-materials Tue, 02 Feb 2010 03:13:49 -0500 http://pdfcast.org/pdf/test4pass-70-549exam-study-guides-trainning-materials Computer / Internet http://pdfcast.org/pdf/test4pass-70-548vbexam-study-guides-trainning-materials Tue, 02 Feb 2010 03:11:55 -0500 http://pdfcast.org/pdf/test4pass-70-548vbexam-study-guides-trainning-materials Computer / Internet http://pdfcast.org/pdf/test4pass-70-526exam-study-guides-trainning-materials Tue, 02 Feb 2010 02:59:06 -0500 http://pdfcast.org/pdf/test4pass-70-526exam-study-guides-trainning-materials Computer / Internet