5,684 research outputs found
Review of Benedict Anderson, 'Under Three Flags: Anarchism and the anti-colonial imagination' (London: Verso, 2005)
Monocular Object Instance Segmentation and Depth Ordering with CNNs
In this paper we tackle the problem of instance-level segmentation and depth
ordering from a single monocular image. Towards this goal, we take advantage of
convolutional neural nets and train them to directly predict instance-level
segmentations where the instance ID encodes the depth ordering within image
patches. To provide a coherent single explanation of an image we develop a
Markov random field which takes as input the predictions of convolutional
neural nets applied at overlapping patches of different resolutions, as well as
the output of a connected component algorithm. It aims to predict accurate
instance-level segmentation and depth ordering. We demonstrate the
effectiveness of our approach on the challenging KITTI benchmark and show good
performance on both tasks.Comment: International Conference on Computer Vision (ICCV), 201
Spatial distribution of trace metals in urban soils and road dusts : an example from Manchester, UK
Urban soil quality is of concern under current UK contaminated land legislation in terms of potential
impacts on human health, due to the legacy of industrial, mining and waste disposal activities and the
fact that soils can act as a sink for potentially harmful substances (PHS) in the urban environment. As part
of the the Geochemical Baseline Survey of the Environment (G-BASE) project of the British Geological
Survey (BGS), 27 UK cities have been surveyed to establish baselines and assess the quality of urban
soils. The G-BASE soil geochemical dataset for Manchester forms the basis of this project. Another
medium that is a likely sink for PHS in urban environments is road dust sediment (RDS). RDS forms as
an accumulation of particles on pavements and road surfaces, and has been shown to be both spatially
and temporally highly variable in composition, as it is more susceptible to remobilisation and transport.
RDS has been documented as carrying a high loading of contaminant species, including significant
amounts of trace metals. Geochemical data from both soils and RDS, despite having different properties,
are essential for environmental assessment in urban areas. Although studies of PHS in RDS and soils
have been published, little is known about the spatial, geochemical and mineralogical linkages between
these two media. The aim of this research is to define and establish these linkages, and produce novel
mineralogical data on the PHS–particulate relationships within soils and RDS
Local integrands for the five-point amplitude in planar N=4 SYM up to five loops
Integrands for colour ordered scattering amplitudes in planar N=4 SYM are
dual to those of correlation functions of the energy-momentum multiplet of the
theory. The construction can relate amplitudes with different numbers of legs.
By graph theory methods the integrand of the four-point function of
energy-momentum multiplets has been constructed up to six loops in previous
work. In this article we extend this analysis to seven loops and use it to
construct the full integrand of the five-point amplitude up to five loops, and
in the parity even sector to six loops.
All results, both parity even and parity odd, are obtained in a concise local
form in dual momentum space and can be displayed efficiently through graphs. We
have verified agreement with other local formulae both in terms of
supertwistors and scalar momentum integrals as well as BCJ forms where those
exist in the literature, i.e. up to three loops.
Finally we note that the four-point correlation function can be extracted
directly from the four-point amplitude and so this uncovers a direct link from
four- to five-point amplitudes.Comment: 29 pages LaTeX, 8 figure
Learning Deep Structured Models
Many problems in real-world applications involve predicting several random
variables which are statistically related. Markov random fields (MRFs) are a
great mathematical tool to encode such relationships. The goal of this paper is
to combine MRFs with deep learning algorithms to estimate complex
representations while taking into account the dependencies between the output
random variables. Towards this goal, we propose a training algorithm that is
able to learn structured models jointly with deep features that form the MRF
potentials. Our approach is efficient as it blends learning and inference and
makes use of GPU acceleration. We demonstrate the effectiveness of our
algorithm in the tasks of predicting words from noisy images, as well as
multi-class classification of Flickr photographs. We show that joint learning
of the deep features and the MRF parameters results in significant performance
gains.Comment: 11 pages including referenc
Retrieval of bilingual Spanish-English information by means of a standard automatic translation system
This paper describes our participation in bilingual retrieval (queries in Spanish on documents in English), by means of an information retrieval system based on the vector model. The queries, formulated in Spanish, were translated into English by means of a commercial automatic translation system; the terms extracted from the resulting translations were filtered in order to get rid of empty words and then they were normalised by stemming. Results are poorer than those obtained through monolingual retrieval with the original queries in English slightly above 15%
Emotional Resistance in Kim Addonizio\u27s Jimmy & Rita : Representing the Negative Effects of Baby-Boomer Values on Generation X
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