240 research outputs found
Real-Time Statistical Speech Translation
This research investigates the Statistical Machine Translation approaches to
translate speech in real time automatically. Such systems can be used in a
pipeline with speech recognition and synthesis software in order to produce a
real-time voice communication system between foreigners. We obtained three main
data sets from spoken proceedings that represent three different types of human
speech. TED, Europarl, and OPUS parallel text corpora were used as the basis
for training of language models, for developmental tuning and testing of the
translation system. We also conducted experiments involving part of speech
tagging, compound splitting, linear language model interpolation, TrueCasing
and morphosyntactic analysis. We evaluated the effects of variety of data
preparations on the translation results using the BLEU, NIST, METEOR and TER
metrics and tried to give answer which metric is most suitable for PL-EN
language pair.Comment: machine translation, polish englis
Simple model of bouncing ball dynamics: displacement of the table assumed as quadratic function of time
Nonlinear dynamics of a bouncing ball moving in gravitational field and
colliding with a moving limiter is considered. Displacement of the limiter is a
quadratic function of time. Several dynamical modes, such as fixed points, 2 -
cycles and chaotic bands are studied analytically and numerically. It is shown
that chaotic bands appear due to homoclinic structures created from unstable 2
- cycles in a corner-type bifurcation.Comment: 11 pages, 6 figure
Simple model of bouncing ball dynamics. Displacement of the limiter assumed as a cubic function of time
Nonlinear dynamics of a bouncing ball moving vertically in a gravitational
field and colliding with a moving limiter is considered and the Poincare map,
describing evolution from an impact to the next impact, is described.
Displacement of the limiter is assumed as periodic, cubic function of time. Due
to simplicity of this function analytical computations are possible. Several
dynamical modes, such as fixed points, 2 - cycles and chaotic bands are studied
analytically and numerically. It is shown that chaotic bands are created from
fixed points after first period doubling in a corner-type bifurcation. Equation
for the time of the next impact is solved exactly for the case of two
subsequent impacts occurring in the same period of limiter's motion making
analysis of chattering possible.Comment: 8 pages, 1 figure, presented at the DSTA 2011 conference, Lodz,
Polan
Triple immunofluorescence labeling of atherosclerotic plaque components in apoE/LDLR -/- mice.
This paper presents a simple and reliable method of triple immunofluorescence staining that allows simultaneous detection of various cell types present in atherosclerotic plaque of apolipoprotein E and LDL receptor-double knockout (apoE/LDLR -/-) mice. We used combined direct and indirect procedures applying commercially available primary antibodies raised in different species to detect smooth muscle cells (Cy3-conjugated mouse anti-smooth muscle actin, SMA), macrophages (rat anti-CD68) and T lymphocytes (rabbit anti-CD3). Fixation of the material in acetone and modified incubation protocol employing nonfat dry milk in preincubation and incubation media significantly increased the intensity of labeling and effectively quenched the background. Our method offers an efficient way to detect qualitative as well as quantitative changes of macrophages, T lymphocytes and smooth muscle cells in atherosclerotic plaque of apoE/LDLR -/- mice during atherosclerosis development or in response to pharmacological treatment
A Search for High-Frequency Coronal Brightness Variations in the 21 August 2017 Total Solar Eclipse
We report on a search for short-period intensity variations in the green-line
FeXIV 530.3 nm emission from the solar corona during the 21 August 2017 total
eclipse viewed from Idaho in the United States. Our experiment was performed
with a much more sensitive detection system, and with better spatial
resolution, than on previous occasions (1999 and 2001 eclipses), allowing fine
details of quiet coronal loops and an active-region loop system to be seen. A
guided 200-mm-aperture Schmidt-Cassegrain telescope was used with a
state-of-the-art CCD camera having 16-bit intensity discrimination and a
field-of-view 0.43 degree x 0.43 degree that encompassed approximately one
third of the visible corona. The camera pixel size was 1.55 arcseconds, while
the seeing during the eclipse enabled features of approx. 2 arcseconds (1450 km
on the Sun) to be resolved. A total of 429 images were recorded during a 122.9
second portion of the totality at a frame rate of 3.49 images per second. In
the analysis, we searched particularly for short-period intensity oscillations
and travelling waves, since theory predicts fast-mode magneto-hydrodynamic
(MHD) waves with short periods may be important in quiet coronal and
active-region heating. Allowing first for various instrumental and photometric
effects, we used a wavelet technique to search for periodicities in some 404
000 pixels in the frequency range 0.5-1.6 Hz (periods: 2 second to 0.6 second).
We also searched for travelling waves along some 65 coronal structures.
However, we found no statistically significant evidence in either. This
negative result considerably refines the limit that we obtained from our
previous analyses, and it indicates that future searches for short-period
coronal waves may be better directed towards Doppler shifts as well as
intensity oscillations
A phase II dose-ranging study of mirabegron in patients with overactive bladder
Introduction and hypothesis Mirabegron is a potent and
selective β3-adrenoceptor agonist that may represent an
alternative treatment option in place of antimuscarinics for
patients with overactive bladder.
Methods Patients completed a single-blinded, 2-week placebo
run-in period followed by 12 weeks of randomized
(n=928) double-blinded treatment with mirabegron oral
controlled absorption system (OCAS) 25, 50, 100, or
200 mg once-daily (QD), placebo or tolterodine extended
release (ER) 4 mg QD. The primary endpoint was
change from baseline to end-of-treatment in mean number
of micturition episodes/24 h. Secondary endpoints
included changes in mean volume voided per micturition;
mean number of urinary incontinence, urgency urinary
incontinence, and urgency episodes/24 h; severity of urgency;
nocturia; and quality of life measures. Safety
parameters included vital signs, adverse events, laboratory
tests, electrocardiogram measurements and post-void residual
volume.
Results Mirabegron 25, 50, 100, and 200 mg resulted in dosedependent
reductions (improvements) from baseline to end-oftreatment
in micturition frequency of 1.9, 2.1, 2.1, and 2.2
micturitions/24 h respectively, versus 1.4 micturitions/24 h with
placebo (p≤0.05 for the mirabegron 50-, 100-, and 200-mg
comparisons). There was a statistically significant improvement
with mirabegron compared with placebo for most secondary
endpoints including quality of life variables. While there was a
significant (p<0.05) increase from baseline in pulse rate in the
mirabegron 100-mg and 200-mg groups, this was not associated
with an increased incidence of cardiovascular adverse events.
Conclusions The favorable efficacy and tolerability of mirabegron
in this phase II dose-finding study has led to its successful
advancement into a phase III clinical development program
A quick approach for rheological evaluation of warm asphalt binders using response surface method
This paper describes a quick approach for quantification of the effects of a chemical warm named Rediset, and its interactions with temperature and aging on the rheological properties of asphalt binders using Response Sur-face Method. The central composite method was applied to design experimental programs for three test temperature conditions, namely; very high temperature (120–180 °C), high temperature (46–82 °C), and intermediate temperature (19–31 °C). Rotational viscosity, G*/sin δ and G*sin δ were selected as parameters to assess the effects of the chemical warm additive on the rheological properties of asphalt binders for different aging conditions. Evaluation of the effects of this additive on the transformed value of G*/sin δ at high temperatures indicates that additive content has significant effect on Ln(G*/sin δ). The results for intermediate temperatures show that this additive has a positive effect on G*sin δ of asphalt binders
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