1,113,750 research outputs found
A Time Domain Waveform for Testing General Relativity
Gravitational-wave parameter estimation is only as good as the theory the
waveform generation models are based upon. It is therefore crucial to test
General Relativity (GR) once data becomes available. Many previous works, such
as studies connected with the ppE framework by Yunes and Pretorius, rely on the
stationary phase approximation (SPA) to model deviations from GR in the
frequency domain. As Fast Fourier Transform algorithms have become considerably
faster and in order to circumvent possible problems with the SPA, we test GR
with corrected time domain waveforms instead of SPA waveforms. Since a
considerable amount of work has been done already in the field using SPA
waveforms, we establish a connection between leading-order-corrected waveforms
in time and frequency domain, concentrating on phase-only corrected terms. In a
Markov Chain Monte Carlo study, whose results are preliminary and will only be
available later, we will assess the ability of the eLISA detector to measure
deviations from GR for signals coming from supermassive black hole inspirals
using these corrected waveforms.Comment: 5 pages. Proceedings of LISA Symposium X, submitted to Journal of
Physics: Conference Serie
Overview of multi-input frequency domain modal testing methods with an emphasis on sine testing
An overview of the current state of the art multiple-input, multiple-output modal testing technology is discussed. A very brief review of the current time domain methods is given. A detailed review of frequency and spatial domain methods is presented with an emphasis on sine testing
Testing simplified protein models of the hPin1 WW domain
The WW domain of the human Pin1 protein for its simple topology and the large
amount of experimental data is an ideal candidate to assess theoretical
approaches to protein folding. The purpose of the present work is to compare
the reliability of the chemically-based Sorenson/Head-Gordon (SHG) model and a
standard native centric model in reproducing through molecular dynamics
simulations some of the well known features of the folding transition of this
small domain. Our results show that the G\={o} model correctly reproduces the
cooperative, two-state, folding mechanism of the WW-domain, while the SHG model
predicts a transition occurring in two stages: a collapse followed by a
structural rearrangement. The lack of a cooperative folding in the SHG
simulations appears to be related to the non-funnel shape of the energy
landscape featuring a partitioning of the native valley in sub-basins
corresponding to different chain chiralities. However the SHG approach remains
more reliable in estimating the -values with respect to G\={o}-like
description. This may suggest that the WW-domain folding process is stirred by
energetic and topological factors as well, and it highlights the better
suitability of chemically-based models in simulating mutations.Comment: RevTex4: 12 pages and 13 eps-figure file
Testing M2T/T2M Transformations
Presentado en: 16th International Conference on Model Driven Engineering Languages and Systems (MODELS 2013). Del 29 de septiembre al 4 de octubre. Miami, EEUU.Testing model-to-model (M2M) transformations is becoming a prominent topic in the current Model-driven Engineering landscape. Current approaches for transformation testing, however, assume having explicit model representations for the input domain and for the output domain of the transformation. This excludes other important transformation kinds, such as model-to-text (M2T) and text-to-model (T2M) transformations, from being properly tested since adequate model representations are missing either for the input domain or for the output domain. The contribution of this paper to overcome this gap is extending Tracts, a M2M transformation testing approach, for M2T/T2M transformation testing. The main mechanism we employ for reusing Tracts is to represent text within a generic metamodel. By this, we transform the M2T/T2M transformation specification problems into equivalent M2M transformation specification problems. We demonstrate the applicability of the approach by two examples and present how the approach is implemented for the Eclipse Modeling Framework (EMF). Finally, we apply the approach to evaluate code generation capabilities of several existing UML tools.Universidad de MĂĄlaga. Campus de Excelencia Internacional AndalucĂa Tech. Proyecto TIN2011-2379
Towards using web-crawled data for domain adaptation in statistical machine translation
This paper reports on the ongoing work focused on domain adaptation of statistical machine translation using domain-speciïŹc data obtained by domain-focused web crawling. We present a strategy for crawling monolingual and parallel data and their exploitation for testing, language modelling, and system tuning in a phrase--based machine translation framework. The proposed approach is evaluated on the domains of Natural Environment and Labour Legislation and two language
pairs: EnglishâFrench and EnglishâGreek
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