6,606 research outputs found
Compositional bisimulation metric reasoning with Probabilistic Process Calculi
We study which standard operators of probabilistic process calculi allow for
compositional reasoning with respect to bisimulation metric semantics. We argue
that uniform continuity (generalizing the earlier proposed property of
non-expansiveness) captures the essential nature of compositional reasoning and
allows now also to reason compositionally about recursive processes. We
characterize the distance between probabilistic processes composed by standard
process algebra operators. Combining these results, we demonstrate how
compositional reasoning about systems specified by continuous process algebra
operators allows for metric assume-guarantee like performance validation
DCT Implementation on GPU
There has been a great progress in the field of graphics processors. Since, there is no rise in the speed of the normal CPU processors; Designers are coming up with multi-core, parallel processors. Because of their popularity in parallel processing, GPUs are becoming more and more attractive for many applications. With the increasing demand in utilizing GPUs, there is a great need to develop operating systems that handle the GPU to full capacity. GPUs offer a very efficient environment for many image processing applications. This thesis explores the processing power of GPUs for digital image compression using Discrete cosine transform
Primordial RNA Replication and Applications in PCR Technology
The emergence of self-replication and information transmission in life's
origin remains unexplained despite extensive research on the topic. A
hypothesis explaining the transition from a simple organic world to a complex
RNA world is offered here based on physical factors in hydrothermal vent
systems. An interdisciplinary approach is taken using techniques from
thermodynamics, fluid dynamics, oceanography, statistical mechanics, and
stochastic processes to examine nucleic acid dynamics and kinetics in a
hydrothermal vent from first principles. Analyses are carried out using both
analytic and computational methods and confirm the plausibility of a reaction
involving the PCR-like assembly of ribonucleotides. The proposal is put into
perspective with established theories on the origin of life and more generally
the onset of order and information transmission in prebiotic systems. A
biomimicry application of this hypothetical process to PCR technology is
suggested and its viability is evaluated in a rigorous logical analysis.
Optimal temperature curves begin to be established using Monte Carlo
simulation, variational calculus, and Fourier analysis. The converse argument
is also made but qualitatively, asserting that the success of such a
modification to PCR would in turn reconfirm the biological theory.Comment: 20 pages, 7 figure
Fractals in the Nervous System: conceptual Implications for Theoretical Neuroscience
This essay is presented with two principal objectives in mind: first, to
document the prevalence of fractals at all levels of the nervous system, giving
credence to the notion of their functional relevance; and second, to draw
attention to the as yet still unresolved issues of the detailed relationships
among power law scaling, self-similarity, and self-organized criticality. As
regards criticality, I will document that it has become a pivotal reference
point in Neurodynamics. Furthermore, I will emphasize the not yet fully
appreciated significance of allometric control processes. For dynamic fractals,
I will assemble reasons for attributing to them the capacity to adapt task
execution to contextual changes across a range of scales. The final Section
consists of general reflections on the implications of the reviewed data, and
identifies what appear to be issues of fundamental importance for future
research in the rapidly evolving topic of this review
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