1,474 research outputs found
Identifying Sources and Sinks in the Presence of Multiple Agents with Gaussian Process Vector Calculus
In systems of multiple agents, identifying the cause of observed agent
dynamics is challenging. Often, these agents operate in diverse, non-stationary
environments, where models rely on hand-crafted environment-specific features
to infer influential regions in the system's surroundings. To overcome the
limitations of these inflexible models, we present GP-LAPLACE, a technique for
locating sources and sinks from trajectories in time-varying fields. Using
Gaussian processes, we jointly infer a spatio-temporal vector field, as well as
canonical vector calculus operations on that field. Notably, we do this from
only agent trajectories without requiring knowledge of the environment, and
also obtain a metric for denoting the significance of inferred causal features
in the environment by exploiting our probabilistic method. To evaluate our
approach, we apply it to both synthetic and real-world GPS data, demonstrating
the applicability of our technique in the presence of multiple agents, as well
as its superiority over existing methods.Comment: KDD '18 Proceedings of the 24th ACM SIGKDD International Conference
on Knowledge Discovery & Data Mining, Pages 1254-1262, 9 pages, 5 figures,
conference submission, University of Oxford. arXiv admin note: text overlap
with arXiv:1709.0235
Identification of WISE J000100.45+065259.6 as an M8.5+T5 Spectral Binary Candidate
[not part of RNAAS note] We report the discovery of WISE J000100.45+065259.6
as a very low mass star/brown dwarf spectral binary candidate, on the basis of
low resolution near-infrared spectroscopy obtained with IRTF/SpeX.
Decomposition of the spectrum indicates component types of M8.5+T5 with a
predicted = 3.5. As the majority of confirmed spectral binary
candidates to date are very closely-separated systems ( 3 AU;
15~yr), this source may provide mass measurements across the
hydrogen burning limit within the decade.Comment: 3 pages, 1 figure, accepted to Research Notes of the AA
A Comparison of Quality Improvement Practices in Korea, New Zealand and the United States of America
The focus of this paper is the quality of the organization's product or service, More specifically, this study identifies alternative approaches to quality improvement practised in the United States, Korea and New Zealand, and then groups companies by quality improvement practice, measuring group financial and operating success. Factors reflecting approach to improvement could be identified for performance quality in all three countries, productivity in all three countries, and financial results in U.S.A. and Korea. It can be also observed that for most dependent variables, the regression used multiple factors to explain the relationship. That is, factors which are grouping of improvement approach items, are required to explain quality, productivity, and financial performance. In other words, an individual item, expressed as one approach to quality or productivity improvement, cannot explain performance in a statistically significant manner. Multiple and complex relationships are required to explain performance
F21RS SGB No. 7 (Appropriation bill threshold)
A Bill
To amend the Student Government Cod
Spatially Averaged Quantum Inequalities Do Not Exist in Four-Dimensional Spacetime
We construct a particular class of quantum states for a massless, minimally
coupled free scalar field which are of the form of a superposition of the
vacuum and multi-mode two-particle states. These states can exhibit local
negative energy densities. Furthermore, they can produce an arbitrarily large
amount of negative energy in a given region of space at a fixed time. This
class of states thus provides an explicit counterexample to the existence of a
spatially averaged quantum inequality in four-dimensional spacetime.Comment: 13 pages, 1 figure, minor corrections and added comment
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