1,615 research outputs found
Contour deformation trick in hybrid NLIE
The hybrid NLIE of AdS_5 x S^5 is applied to a wider class of states. We find
that the Konishi state of the orbifold AdS_5 x (S^5/Z_S) satisfies A_1 NLIE
with the source terms which are derived from contour deformation trick. For
general states, we construct a deformed contour with which the contour
deformation trick yields the correct source terms.Comment: 39 pages, 6 figures, v2: discussion on analyticity constraints
replaced by consistent deformed contou
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Comparison of Canine Spermatozoa Motility, Morphology, and RNA Integrity Using Three Different Cell Purification Solutions
Transcriptome gene expression studies of sperm RNA have been utilized in a variety of different species to investigate causes of male infertility. Previous research investigators have optimized cell separation and RNA isolation techniques for each species of interest. To date, no study has been completed for dogs. The objective of this thesis research was to investigate the efficacy of various cell separation techniques in separating sperm cells from somatic cells in the ejaculate to yield a sample of total pure sperm RNA that could be used for a future downstream application. Comparisons were made between the conventional swim-up method and two commercial density gradient centrifugation (DGC) solutions (Bovipure[supercript]TM and Equipure[superscript]TM, Nidacon International, Mölndal, Sweden) Prior to and just following cell separation, total motility, normal morphology, and sperm count were determined for each method. Following cell separation, total RNA was isolated from each sample and RNA quantity and quality was determined via spectrophotometry and reverse transcriptase polymerase chain reaction. The presence of somatic cell RNA was used to determine purity of the cell separation method. The DGC methods were superior in separating sperm with higher percent normal morphology and higher total motility than the swim-up method. Additionally, the DGC methods were superior at producing a more pure RNA sample than samples not treated with any
separation technique (control). This research shows that the DGC methods should be used to separate canine sperm cells prior to RNA isolation for sperm-specific transcriptome applications
Konishi operator at intermediate coupling
TBA equations for two-particle states from the sl(2) sector proposed by
Arutyunov, Suzuki and the author are solved numerically for the Konishi
operator descendent up to 't Hooft's coupling lambda ~ 2046. The data obtained
is used to analyze the properties of Y-functions and address the issue of the
existence of the critical values of the coupling. In addition we find a new
integral representation for the BES dressing phase which substantially reduces
the computational time.Comment: lots of figures, v2: improved numerics, c1=2, c2=0, c4 does not
vanis
Gravity darkening and tidally perturbed stellar pulsation in the misaligned exoplanet system WASP-33
WASP-33 is one of the few Sct stars with a known planetary
companion. By analyzing the stellar oscillations, we search for possible
star-planet interactions in the pattern of the pulsation. We made use of the
Transit and Light Curve Modeller (TLCM) to solve the light curve from the
Transiting Exoplanet Survey Satellite (TESS). We include gravity darkening into
our analysis. The stellar oscillation pattern of WASP-33 clearly shows signs of
several tidally perturbed modes. We find that there are peaks in the frequency
spectrum that are at or near the rd, th and th orbital harmonics
( d). Also, there is a prominent overabundance of
pulsational frequencies rightwards of the orbital harmonics, being
characteristic of a tidally perturbed stellar pulsation, which is an outcome of
star-planet interactions in the misaligned system. There are peaks in both the
Sct and Dor ranges of the Fourier spectrum, implying that
WASP-33 is a Dor -- Sct hybrid pulsator. The transit light
curves are best fitted by a gravity darkened stellar model, and the planet
parameters are consistent with earlier determinations.Comment: Accepted in A&A on 12 March 2022, 6 pages, 4 figure
Response of a catalytic reaction to periodic variation of the CO pressure: Increased CO_2 production and dynamic phase transition
We present a kinetic Monte Carlo study of the dynamical response of a
Ziff-Gulari-Barshad model for CO oxidation with CO desorption to periodic
variation of the CO presure. We use a square-wave periodic pressure variation
with parameters that can be tuned to enhance the catalytic activity. We produce
evidence that, below a critical value of the desorption rate, the driven system
undergoes a dynamic phase transition between a CO_2 productive phase and a
nonproductive one at a critical value of the period of the pressure
oscillation. At the dynamic phase transition the period-averged CO_2 production
rate is significantly increased and can be used as a dynamic order parameter.
We perform a finite-size scaling analysis that indicates the existence of
power-law singularities for the order parameter and its fluctuations, yielding
estimated critical exponent ratios and . These exponent ratios, together with theoretical symmetry
arguments and numerical data for the fourth-order cumulant associated with the
transition, give reasonable support for the hypothesis that the observed
nonequilibrium dynamic phase transition is in the same universality class as
the two-dimensional equilibrium Ising model.Comment: 18 pages, 10 figures, accepted in Physical Review
Nonlinear integral equations for finite volume excited state energies of the O(3) and O(4) nonlinear sigma-models
We propose nonlinear integral equations for the finite volume one-particle
energies in the O(3) and O(4) nonlinear sigma-models. The equations are written
in terms of a finite number of components and are therefore easier to solve
numerically than the infinite component excited state TBA equations proposed
earlier. Results of numerical calculations based on the nonlinear integral
equations and the excited state TBA equations agree within numerical precision.Comment: numerical results adde
Barriers to the development of palliative care in Western Europe
The Eurobarometer Survey of the <i>EAPC Task Force on the Development of Palliative Care in Europe</i> is part of a programme of work to produce comprehensive information on the provision of palliative care across Europe.
Aim: To identify barriers to the development of palliative care in Western Europe.
Method: A qualitative survey was undertaken amongst boards of national associations, eliciting opinions on opportunities for, and barriers to, palliative care development. By July 2006, 44/52 (85%) European countries had responded to the survey; we report here on the results from 22/25 (88%) countries in Western Europe.
Analysis: Data from the Eurobarometer survey were analysed thematically by geographical region and by the degree of development of palliative care in each country.
Results: From the data contained within the Eurobarometer, we identified six significant barriers to the development of palliative care in Western Europe: (i) Lack of palliative care education and training programmes (ii) Lack of awareness and recognition of palliative care (iii) Limited availability of/knowledge about opioid analgesics (iv) Limited funding (v) Lack of coordination amongst services (vi) Uneven palliative care coverage.
Conclusion: Findings from the EAPC Eurobarometer survey suggest that barriers to the development of palliative care in Western Europe may differ substantially from each other in both their scope and context and that some may be considered to be of greater significance than others. A number of common barriers to the development of the discipline do exist and much work still remains to be done in the identified areas. This paper provides a road map of which barriers need to be addressed
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