11 research outputs found
Numerical aerodynamic simulation facility feasibility study
There were three major issues examined in the feasibility study. First, the ability of the proposed system architecture to support the anticipated workload was evaluated. Second, the throughput of the computational engine (the flow model processor) was studied using real application programs. Third, the availability reliability, and maintainability of the system were modeled. The evaluations were based on the baseline systems. The results show that the implementation of the Numerical Aerodynamic Simulation Facility, in the form considered, would indeed be a feasible project with an acceptable level of risk. The technology required (both hardware and software) either already exists or, in the case of a few parts, is expected to be announced this year. Facets of the work described include the hardware configuration, software, user language, and fault tolerance
LIPIcs, Volume 261, ICALP 2023, Complete Volume
LIPIcs, Volume 261, ICALP 2023, Complete Volum
Parallel alogorithms for MIMD parallel computers
This thesis mainly covers the design and analysis of asynchronous
parallel algorithms that can be run on MIMD (Multiple Instruction
Multiple Data) parallel computers, in particular the NEPTUNE system at
Loughborough University. Initially the fundamentals of parallel computer
architectures are introduced with different parallel architectures being
described and compared. The principles of parallel programming and the
design of parallel algorithms are also outlined. Also the main
characteristics of the 4 processor MIMD NEPTUNE system are presented,
and performance indicators, i.e. the speed-up and the efficiency factors
are defined for the measurement of parallelism in a given system.
Both numerical and non-numerical algorithms are covered in the
thesis. In the numerical solution of partial differential equations,
a new parallel 9-point block iterative method is developed. Here, the
organization of the blocks is done in such a way that each process
contains its own group of 9 points on the network, therefore, they can
be run in parallel. The parallel implementation of both 9-point and 4-
point block iterative methods were programmed using natural and redblack
ordering with synchronous and asynchronous approaches. The
results obtained for these different implementations were compared and
analysed.
Next the parallel version of the A.G.E. (Alternating Group Explicit)
method is developed in which the explicit nature of the difference
equation is revealed and exploited when applied to derive the solution
of both linear and non-linear 2-point boundary value problems. Two
strategies have been used in the implementation of the parallel A.G.E.
method using the synchronous and asynchronous approaches. The results
from these implementations were compared. Also for comparison reasons
the results obtained from the parallel A.G.E. were compared with the ~
corresponding results obtained from the parallel versions of the Jacobi,
Gauss-Seidel and S.O.R. methods. Finally, a computational complexity
analysis of the parallel A.G.E. algorithms is included.
In the area of non-numeric algorithms, the problems of sorting and
searching were studied. The sorting methods which were investigated
was the shell and the digit sort methods. with each method different
parallel strategies and approaches were used and compared to find the
best results which can be obtained on the parallel machine.
In the searching methods, the sequential search algorithm in an
unordered table and the binary search algorithms were investigated and
implemented in parallel with a presentation of the results. Finally,
a complexity analysis of these methods is presented.
The thesis concludes with a chapter summarizing the main results
LIPIcs, Volume 251, ITCS 2023, Complete Volume
LIPIcs, Volume 251, ITCS 2023, Complete Volum
Women in Artificial intelligence (AI)
This Special Issue, entitled "Women in Artificial Intelligence" includes 17 papers from leading women scientists. The papers cover a broad scope of research areas within Artificial Intelligence, including machine learning, perception, reasoning or planning, among others. The papers have applications to relevant fields, such as human health, finance, or education. It is worth noting that the Issue includes three papers that deal with different aspects of gender bias in Artificial Intelligence. All the papers have a woman as the first author. We can proudly say that these women are from countries worldwide, such as France, Czech Republic, United Kingdom, Australia, Bangladesh, Yemen, Romania, India, Cuba, Bangladesh and Spain. In conclusion, apart from its intrinsic scientific value as a Special Issue, combining interesting research works, this Special Issue intends to increase the invisibility of women in AI, showing where they are, what they do, and how they contribute to developments in Artificial Intelligence from their different places, positions, research branches and application fields. We planned to issue this book on the on Ada Lovelace Day (11/10/2022), a date internationally dedicated to the first computer programmer, a woman who had to fight the gender difficulties of her times, in the XIX century. We also thank the publisher for making this possible, thus allowing for this book to become a part of the international activities dedicated to celebrating the value of women in ICT all over the world. With this book, we want to pay homage to all the women that contributed over the years to the field of AI
LIPIcs, Volume 274, ESA 2023, Complete Volume
LIPIcs, Volume 274, ESA 2023, Complete Volum