2,064 research outputs found
Learning Visual Clothing Style with Heterogeneous Dyadic Co-occurrences
With the rapid proliferation of smart mobile devices, users now take millions
of photos every day. These include large numbers of clothing and accessory
images. We would like to answer questions like `What outfit goes well with this
pair of shoes?' To answer these types of questions, one has to go beyond
learning visual similarity and learn a visual notion of compatibility across
categories. In this paper, we propose a novel learning framework to help answer
these types of questions. The main idea of this framework is to learn a feature
transformation from images of items into a latent space that expresses
compatibility. For the feature transformation, we use a Siamese Convolutional
Neural Network (CNN) architecture, where training examples are pairs of items
that are either compatible or incompatible. We model compatibility based on
co-occurrence in large-scale user behavior data; in particular co-purchase data
from Amazon.com. To learn cross-category fit, we introduce a strategic method
to sample training data, where pairs of items are heterogeneous dyads, i.e.,
the two elements of a pair belong to different high-level categories. While
this approach is applicable to a wide variety of settings, we focus on the
representative problem of learning compatible clothing style. Our results
indicate that the proposed framework is capable of learning semantic
information about visual style and is able to generate outfits of clothes, with
items from different categories, that go well together.Comment: ICCV 201
Symposium: Giving Korematsu v. United States A Sober Second Thought
We are elated to present Professor Mark Killenbeck’s thought provoking article, Sober Second Thought? Korematsu Reconsidered. Killenbeck dives into the Korematsu opinion and its history with great care to determine whether it truly “has no place in law under the Constitution” as Chief Justice John Roberts declared in Trump v. Hawaii.1 While Korematsu’s result provides an understandable “impulse to condemn” it, Killenbeck shows us that focusing solely on the case’s result “stands apart from and in stark contrast to its most important place in the constitutional order: articulation of precepts and terminology that provide the foundations for strict scrutiny.
Application of Ground-Penetrating Radar to Mapping Archaeological Features at the Gould Site, Port au Choix
Density waves in the shearing sheet IV. Interaction with a live dark halo
It is shown that if the self-gravitating shearing sheet, a model of a patch
of a galactic disk, is embedded in a live dark halo, this has a strong effect
on the dynamics of density waves in the sheet. I describe how the density waves
and the halo interact via halo particles either on orbits in resonance with the
wave or on non-resonant orbits. Contrary to expectation the presence of the
halo leads to a very considerable enhancement of the amplitudes of the density
waves in the shearing sheet. This effect appears to be the equivalent of the
recently reported enhanced growth of bars in numerically simulated stellar
disks embedded in live dark halos. Finally I discuss the transfer of linear
momentum from a density wave in the sheet to the halo and show that it is
mediated only by halo particles on resonant orbits.Comment: 8 pages, 4 figures, accepted by Astron. Astrophy
Non-LTE Spectra of Accretion Disks Around Intermediate-Mass Black Holes
We have calculated the structures and the emergent spectra of stationary,
geometrically thin accretion disks around 100 and 1000 M_sun black holes in
both the Schwarzschild and extreme Kerr metrics. Equations of radiative
transfer, hydrostatic equilibrium, energy balance, ionization equilibrium, and
statistical equilibrium are solved simultaneously and consistently. The six
most astrophysically abundant elements (H, He, C, N, O, and Fe) are included,
as well as energy transfer by Comptonization. The observed spectrum as a
function of viewing angle is computed incorporating all general relativistic
effects. We find that, in contrast with the predictions of the commonly-used
multi-color disk (MCD) model, opacity associated with photoionization of heavy
elements can significantly alter the spectrum near its peak. These ionization
edges can create spectral breaks visible in the spectra of slowly-spinning
black holes viewed from almost all angles and in the spectra of
rapidly-spinning black holes seen approximately pole-on. For fixed mass and
accretion rate relative to Eddington, both the black hole spin and the viewing
angle can significantly shift the observed peak energy of the spectrum,
particularly for rapid spin viewed obliquely or edge-on. We present a detailed
test of the approximations made in various forms of the MCD model. Linear
limb-darkening is confirmed to be a reasonable approximation for the integrated
flux, but not for many specific frequencies of interest.Comment: 30 pages, 11 eps figures, accepted for publication in Ap
Turbulent Stresses in Local Simulations of Radiation-Dominated Accretion Disks, and the Possibility of the LIghtman-Eardley Instability
We present the results of a series of radiation-MHD simulations of a local
patch of an accretion disk, with fixed vertical gravity profile but with
different surface mass densities and a broad range of radiation to gas pressure
ratios. Each simulation achieves a thermal equilibrium that lasts for many
cooling times. After averaging over times long compared to a cooling time, we
find that the vertically integrated stress is approximately proportional to the
vertically-averaged total thermal (gas plus radiation) pressure. We map
out--for the first time on the basis of explicit physics--the thermal
equilibrium relation between stress and surface density: the stress decreases
(increases) with increasing surface mass density when the simulation is
radiation (gas) pressure dominated. The dependence of stress on surface mass
density in the radiation pressure dominated regime suggests the possibility of
a Lightman-Eardley inflow instability, but global simulations or shearing box
simulations with much wider radial boxes will be necessary to confirm this and
determine its nonlinear behavior.Comment: accepted for publication in The Astrophysical Journa
Pilot-Configurable Information on a Display Unit
A small thin display unit that can be installed in the flight deck for displaying only flight crew-selected tactical information needed for the task at hand. The flight crew can select the tactical information to be displayed by means of any conventional user interface. Whenever the flight crew selects tactical information for processes the request, including periodically retrieving measured current values or computing current values for the requested tactical parameters and returning those current tactical parameter values to the display unit for display
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