19,033 research outputs found
New Strategies for Latino Voter Mobilization: The Nevada Democratic Caucus as a Case Study
Describes the 2008 Democratic caucus in Nevada with a focus on the large Hispanic/Latino population. Reviews earlier efforts to raise historically low voter participation rates and the role of the media and suggests new models for voter mobilization
Contextualization of topics - browsing through terms, authors, journals and cluster allocations
This paper builds on an innovative Information Retrieval tool, Ariadne. The
tool has been developed as an interactive network visualization and browsing
tool for large-scale bibliographic databases. It basically allows to gain
insights into a topic by contextualizing a search query (Koopman et al., 2015).
In this paper, we apply the Ariadne tool to a far smaller dataset of 111,616
documents in astronomy and astrophysics. Labeled as the Berlin dataset, this
data have been used by several research teams to apply and later compare
different clustering algorithms. The quest for this team effort is how to
delineate topics. This paper contributes to this challenge in two different
ways. First, we produce one of the different cluster solution and second, we
use Ariadne (the method behind it, and the interface - called LittleAriadne) to
display cluster solutions of the different group members. By providing a tool
that allows the visual inspection of the similarity of article clusters
produced by different algorithms, we present a complementary approach to other
possible means of comparison. More particular, we discuss how we can - with
LittleAriadne - browse through the network of topical terms, authors, journals
and cluster solutions in the Berlin dataset and compare cluster solutions as
well as see their context.Comment: proceedings of the ISSI 2015 conference (accepted
Quantum solitons in spin-orbit-coupled Bose-Bose mixtures
Recent experimental and theoretical results show that weakly interacting
atomic Bose-Bose mixtures with attractive interspecies interaction are
stabilized by beyond-mean-field effects. Here we consider the peculiar
properties of these systems in a strictly one-dimensional configuration, taking
also into account the nontrivial role of spin-orbit and Rabi couplings. We show
that when the value of inter- and intraspecies interaction strengths are such
that mean-field contributions to the energy cancel, a self-bound bright soliton
fully governed by quantum fluctuations exists. We derive the phase diagram of
the phase transition between a single-peak soliton and a multipeak (striped)
soliton, produced by the interplay between spin-orbit, Rabi couplings and
beyond-mean-field effects, which also affect the breathing mode frequency of
the atomic cloud. Finally, we prove that a phase imprinting of the single-peak
soliton leads to a self-confined propagating solitary wave even in the presence
of spin-orbit coupling.Comment: 6 pages, 4 figures, published in Phys. Rev.
PLC for the smart grid: state-of-the-art and challenges
This paper aims to review systems and applications for power line communications (PLC) in the context of the smart grid. We discuss the main applications and summarise state-of-the-art PLC systems and standards. We report efforts and challenges in channel and noise modelling, as well as in state-of-the-art transmission technology approaches
Relation between Plasma Process-Induced Oxide Failure Fraction and Antenna Ratio
Conventional antenna charging theory predicts that the net current drawn from plasma is proportional to the charge collecting area of the antenna. However, a quantitative relation between plasma process-induced oxide failure fraction and antenna ratio (AR) has not been found yet. In this paper, yield data of antenna testers have been correlated to the AR in a 0.18 Âżm CMOS technology process. A model is built which fits the experiment data very well. Based on this model, yield loss data obtained on large AR test structures can be used to extrapolate the charging currents and yield loss of smaller AR structures which occur more often in real circuit
Ariadne's Thread - Interactive Navigation in a World of Networked Information
This work-in-progress paper introduces an interface for the interactive
visual exploration of the context of queries using the ArticleFirst database, a
product of OCLC. We describe a workflow which allows the user to browse live
entities associated with 65 million articles. In the on-line interface, each
query leads to a specific network representation of the most prevailing
entities: topics (words), authors, journals and Dewey decimal classes linked to
the set of terms in the query. This network represents the context of a query.
Each of the network nodes is clickable: by clicking through, a user traverses a
large space of articles along dimensions of authors, journals, Dewey classes
and words simultaneously. We present different use cases of such an interface.
This paper provides a link between the quest for maps of science and on-going
debates in HCI about the use of interactive information visualisation to
empower users in their search.Comment: CHI'15 Extended Abstracts, April 18-23, 2015, Seoul, Republic of
Korea. ACM 978-1-4503-3146-3/15/0
Baryogenesis at a Lepton-Number-Breaking Phase Transition
We study a scenario in which the baryon asymmetry of the universe arises from
a cosmological phase transition where lepton-number is spontaneously broken. If
the phase transition is first order, a lepton-number asymmetry can arise at the
bubble wall, through dynamics similar to electroweak baryogenesis, but
involving right-handed neutrinos. In addition to the usual neutrinoless double
beta decay in nuclear experiments, the model may be probed through a variety of
"baryogenesis by-products," which include a stochastic background of
gravitational waves created by the colliding bubbles. Depending on the model,
other aspects may include a network of topological defects that produce their
own gravitational waves, additional contribution to dark radiation, and a light
pseudo-Goldstone boson (majoron) as dark matter candidate.Comment: 21 pages + 10 appendices & references, 3 figure
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