49,109 research outputs found
On the Busemann-Petty problem concerning central sections of centrally symmetric convex bodies
We present a method which shows that in \Eb the Busemann-Petty problem,
concerning central sections of centrally symmetric convex bodies, has a
positive answer. Together with other results, this settles the problem in each
dimension.Comment: 5 page
Technique cuts time and cost of bending jacketed piping
Technique uses a stiff medium in the annular space between inner and outer pipes of jacketed piping in transfer lines. The process eliminates splitting and welding and makes possible the use of standard pipe-bending tools
A Reverse Hex Solver
We present Solrex,an automated solver for the game of Reverse Hex.Reverse
Hex, also known as Rex, or Misere Hex, is the variant of the game of Hex in
which the player who joins her two sides loses the game. Solrex performs a
mini-max search of the state space using Scalable Parallel Depth First Proof
Number Search, enhanced by the pruning of inferior moves and the early
detection of certain winning strategies. Solrex is implemented on the same code
base as the Hex program Solver, and can solve arbitrary positions on board
sizes up to 6x6, with the hardest position taking less than four hours on four
threads.Comment: Presented at Computers and Games 2016 Leiden, International
Conference on Computers and Games. Springer International Publishing, 201
Novel convolution-based signal processing techniques for an artificial olfactory mucosa
As our understanding of the human olfactory system has grown, so has our ability to design artificial devices that mimic its functionality, so called electronic noses (e-noses). This has led to the development of a more sophisticated biomimetic system known as an artificial olfactory mucosa (e-mucosa) that comprises a large distributed sensor array and artificial mucous layer. In order to exploit fully this new architecture, new approaches are required to analyzing the rich data sets that it generates. In this paper, we propose a novel convolution based approach to processing signals from the e-mucosa. Computer simulations are performed to investigate the robustness of this approach when subjected to different real-world problems, such as sensor drift and noise. Our results demonstrate a promising ability to classify odors from poor sensor signals
Differential pressure cell Patent
Differential pressure cell insensitive to changes in ambient temperature and extreme overloa
How is mortality affected by money, marriage, and stress?
It is believed that the length of a person’s life depends on a mixture of economic and social factors. Yet the relative importance of these is still debated. We provide recent British evidence that marriage has a strong positive effect on longevity. Economics matters less. After controlling for health at the start of the 1990s, we cannot find reliable evidence that income affects the probability of death in the subsequent decade. Although marriage keeps people alive, it does not appear to work through a reduction of stress levels. Greater levels of psychological distress (as measured by General Health Questionnaire (GHQ) stress scores) cannot explain why unmarried people die younger. For women, however, we do find that mental strain itself is dangerous. High GHQ stress scores help to predict the probability of an early death
A spatial capture-recapture model for territorial species
Advances in field techniques have lead to an increase in spatially-referenced
capture-recapture data to estimate a species' population size as well as other
demographic parameters and patterns of space usage. Statistical models for
these data have assumed that the number of individuals in the population and
their spatial locations follow a homogeneous Poisson point process model, which
implies that the individuals are uniformly and independently distributed over
the spatial domain of interest. In many applications there is reason to
question independence, for example when species display territorial behavior.
In this paper, we propose a new statistical model which allows for dependence
between locations to account for avoidance or territorial behavior. We show via
a simulation study that accounting for this can improve population size
estimates. The method is illustrated using a case study of small mammal
trapping data to estimate avoidance and population density of adult female
field voles (Microtus agrestis) in northern England
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