2,313 research outputs found
KIT’s Submission to the IWSLT 2019 Shared Task on Text Translation
In this paper, we describe KIT’s submission for the IWSLT 2019 shared task on text translation. Our system is based on the transformer model [1] using our in-house implementation. We augment the available training data using back-translation and employ fine-tuning for the final model. For our best results, we used a 12-layer transformer-big config- uration, achieving state-of-the-art results on the WMT2018 test set. We also experiment with student-teacher models to improve performance of smaller models
Fast Algorithms and Efficient Statistics: N-point Correlation Functions
We present here a new algorithm for the fast computation of N-point
correlation functions in large astronomical data sets. The algorithm is based
on kdtrees which are decorated with cached sufficient statistics thus allowing
for orders of magnitude speed-ups over the naive non-tree-based implementation
of correlation functions. We further discuss the use of controlled
approximations within the computation which allows for further acceleration. In
summary, our algorithm now makes it possible to compute exact, all-pairs,
measurements of the 2, 3 and 4-point correlation functions for cosmological
data sets like the Sloan Digital Sky Survey (SDSS; York et al. 2000) and the
next generation of Cosmic Microwave Background experiments (see Szapudi et al.
2000).Comment: To appear in Proceedings of MPA/MPE/ESO Conference "Mining the Sky",
July 31 - August 4, 2000, Garching, German
The Success of Gay–Straight Alliances in Waterloo Region, Ontario: A Confluence of Political and Social Factors
This article outlines how gay–straight alliances (GSAs) work to connect youth with community resources, and outlines the political and social context of GSAs in Waterloo Region, Ontario, Canada. Fifteen individuals (youth, teachers, and a lesbian, gay, bisexual, transgender, and queer [LGBTQ] youth service provider) participated in interviews about the role of GSAs in creating supportive school environments for LGBTQ youth and their allies. Analyses of the interview data found that, apart from providing direct support to LGBTQ students, GSAs in Waterloo Region decrease isolation by connecting youth with other LGBTQ community members, events, and resources. This article discusses how the confluence of government and school board policy and community agency support facilitates the implementation, maintenance, and success of GSAs
Polaronic hole localization and multiple hole binding of acceptors in oxide wide-gap semiconductors
Acceptor-bound holes in oxides often localize asymmetrically at one out of
several equivalent oxygen ligands. Whereas Hartree-Fock (HF) theory overly
favors such symmetry-broken polaronic hole-localization in oxides, standard
local density (LD) calculations suffer from spurious delocalization among
several oxygen sites. These opposite biases originate from the opposite
curvatures of the energy as a function of the fractional occupation number n,
i.e., d2E/dn2 0 in LD. We recover the correct linear
behavior, d2E/dn2 = 0, that removes the (de)localization bias by formulating a
generalized Koopmans condition. The correct description of oxygen
hole-localization reveals that the cation-site nominal single-acceptors in ZnO,
In2O3, and SnO2 can bind multiple holes
Technology Addictions and Technostress: An Examination of Hong Kong and the U.S.
In today’s technology-centric world, people are becoming increasingly dependent on the Internet. The most common use of the Internet is through social media, which are used to communicate, share, collaborate, and connect. However, continued usage of a hedonic system can be linked with compulsion or addiction. Since problematic usage/behaviors can lead to negative outcomes, this manuscript aims to determine differential effects of Internet and social media addictions on social media-related technostress. This is examined in two different cultures: the U.S. and Hong Kong. The results support the association between Internet and social media addictions with increases in social media-related technostress. Additionally, these effects are moderated by culture. Implications for research and practice are discussed along with future directions for this stream
BONNSAI: a Bayesian tool for comparing stars with stellar evolution models
Powerful telescopes equipped with multi-fibre or integral field spectrographs
combined with detailed models of stellar atmospheres and automated fitting
techniques allow for the analysis of large number of stars. These datasets
contain a wealth of information that require new analysis techniques to bridge
the gap between observations and stellar evolution models. To that end, we
develop BONNSAI (BONN Stellar Astrophysics Interface), a Bayesian statistical
method, that is capable of comparing all available observables simultaneously
to stellar models while taking observed uncertainties and prior knowledge such
as initial mass functions and distributions of stellar rotational velocities
into account. BONNSAI can be used to (1) determine probability distributions of
fundamental stellar parameters such as initial masses and stellar ages from
complex datasets, (2) predict stellar parameters that were not yet
observationally determined and (3) test stellar models to further advance our
understanding of stellar evolution. An important aspect of BONNSAI is that it
singles out stars that cannot be reproduced by stellar models through
hypothesis tests and posterior predictive checks. BONNSAI can be
used with any set of stellar models and currently supports massive
main-sequence single star models of Milky Way and Large and Small Magellanic
Cloud composition. We apply our new method to mock stars to demonstrate its
functionality and capabilities. In a first application, we use BONNSAI to test
the stellar models of Brott et al. (2011a) by comparing the stellar ages
inferred for the primary and secondary stars of eclipsing Milky Way binaries.
Ages are determined from dynamical masses and radii that are known to better
than 3%. We find that the stellar models reproduce the Milky Way binaries well.
BONNSAI is available through a web-interface at
http://www.astro.uni-bonn.de/stars/bonnsai.Comment: Accepted for publication in A&A; 15 pages, 10 figures, 4 tables;
BONNSAI is available through a web-interface at
http://www.astro.uni-bonn.de/stars/bonnsa
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