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Timeshare Owners’ Perceptions of and Preferred Ways of Participating in Tourism Planning
Purpose
To explore the impact of prostate cancer treatment on: (a) the experience of symptoms (i.e. sexual, urinary, and bowel), and (b) perceived health state of men with prostate cancer one month following their radiation treatment. Methods
A prospective pre-test–post-test descriptive survey was conducted on a convenience sample of 73 men with prostate cancer who were recruited from a Regional Cancer Centre in Southwestern Ontario, Canada. Participants receiving radiation treatment (brachy therapy, high dose radiation [HDR] and external beam radiation [EBR], or EBR alone) completed a questionnaire that elicited information pertaining to quality of life (QOL), symptom experiences, and perceived health state prior to, and one month after completion of their radiation treatment. Results
Post-treatment scores showed increased problems with urinary bother (ppp=0.002) and function (p=0.001), and sexual function (p Discussion
Our findings suggest that prostate cancer treatment presents a challenge with regard to symptom experiences and perceived health state in men with prostate cancer. Therefore, strategies for patient education to assist men to cope with their symptoms and to provide them with support in the initial weeks following treatment are discussed
Riemann-Hilbert problem for the small dispersion limit of the KdV equation and linear overdetermined systems of Euler-Poisson-Darboux type
We study the Cauchy problem for the Korteweg de Vries (KdV) equation with
small dispersion and with monotonically increasing initial data using the
Riemann-Hilbert (RH) approach. The solution of the Cauchy problem, in the zero
dispersion limit, is obtained using the steepest descent method for oscillatory
Riemann-Hilbert problems. The asymptotic solution is completely described by a
scalar function \g that satisfies a scalar RH problem and a set of algebraic
equations constrained by algebraic inequalities. The scalar function \g is
equivalent to the solution of the Lax-Levermore maximization problem. The
solution of the set of algebraic equations satisfies the Whitham equations. We
show that the scalar function \g and the Lax-Levermore maximizer can be
expressed as the solution of a linear overdetermined system of equations of
Euler-Poisson-Darboux type. We also show that the set of algebraic equations
and algebraic inequalities can be expressed in terms of the solution of a
different set of linear overdetermined systems of equations of
Euler-Poisson-Darboux type. Furthermore we show that the set of algebraic
equations is equivalent to the classical solution of the Whitham equations
expressed by the hodograph transformation.Comment: 32 pages, 1 figure, latex2
Exploring Hyperons and Hypernuclei with Lattice QCD
In this work we outline a program for lattice QCD that would provide a first
step toward understanding the strong and weak interactions of strange baryons.
The study of hypernuclear physics has provided a significant amount of
information regarding the structure and weak decays of light nuclei containing
one or two Lambda's, and Sigma's. From a theoretical standpoint, little is
known about the hyperon-nucleon interaction, which is required input for
systematic calculations of hypernuclear structure. Furthermore, the
long-standing discrepancies in the P-wave amplitudes for nonleptonic hyperon
decays remain to be understood, and their resolution is central to a better
understanding of the weak decays of hypernuclei. We present a framework that
utilizes Luscher's finite-volume techniques in lattice QCD to extract the
scattering length and effective range for Lambda-N scattering in both QCD and
partially-quenched QCD. The effective theory describing the nonleptonic decays
of hyperons using isospin symmetry alone, appropriate for lattice calculations,
is constructed.Comment: 24 pages, 7 figure
A role for Syk-kinase in the control of the binding cycle of the β2 integrins (CD11/CD18) in human polymorphonuclear neutrophils
A fine control of β2 integrin (CD11/CD18)-mediated firm adhesion of human neutrophils to the endothelial cell monolayer is required to allow ordered emigration. To elucidate the molecular mechanisms that control this process, intracellular protein tyrosine signaling subsequent to β2 integrin-mediated ligand binding was studied by immunoprecipitation and Western blotting techniques. The 72-kDa Syk-kinase, which was tyrosine-phosphorylated upon adhesion, was found to coprecipitate with CD18, the β-subunit of the β2 integrins. Moreover, inhibition of Syk-kinase by piceatannol enhanced adhesion and spreading but diminished N-formyl-Met-Leu-Phe-induced chemotactic migration. The enhancement of adhesiveness was associated with integrin clustering, which results in increased integrin avidity. In contrast, piceatannol had no effect on the surface expression or on the affinity of β2 integrins. Altogether, this suggests that Syk-kinase controls alternation of β2 integrin-mediated ligand binding with integrin detachment
Hyperon Nonleptonic Decays in Chiral Perturbation Theory Reexamined
We recalculate the leading nonanalytic contributions to the amplitudes for
hyperon nonleptonic decays in chiral perturbation theory. Our results partially
disagree with those calculated before, and include new terms previously omitted
in the P-wave amplitudes. Although these modifications are numerically
significant, they do not change the well-known fact that good agreement with
experiment cannot be simultaneously achieved using one-loop S- and P-wave
amplitudes.Comment: 14 pages, latex, 3 figures, uses axodraw.sty, minor additions, to
appear in Phys. Rev.
Lateral palatal foramina are not widespread in Artiodactyla and imply baleen in extinct mysticetes
Hyperons in Two Flavor Chiral Perturbation Theory
We use two-flavor chiral perturbation theory to describe hyperons. We focus
on the strangeness conserving sector, and, as an example, calculate hyperon
masses. Convergence of this two-flavor chiral expansion for observables is
improved over the three-flavor theory. The cost, however, is a larger number of
low-energy constants that must be ultimately determined from lattice QCD data.
A formula for the mass of the omega baryon is derived to sixth order in this
expansion, and will aid lattice practitioners in scale setting or tuning the
strange quark mass.Comment: 14 pages, 3 figs, version published in PL
Chiral Perturbation Theory for |Delta I|=3/2 Hyperon Decays
We study the |Delta I|=3/2 amplitudes of hyperon non-leptonic decays of the
form B->B'+pi in the context of chiral perturbation theory. The lowest-order
predictions are determined in terms of only one unknown parameter and are
consistent within errors with current data. We investigate the theoretical
uncertainty of these predictions by calculating the leading non-analytic
corrections. We also present an estimate for the size of the S-wave Lambda and
Cascade decays which vanish at leading order. We find that the corrections to
the lowest-order predictions are within the expectations of naive power
counting and, therefore, that this picture can be tested more accurately with
improved measurements.Comment: 22 pages, latex, 4 figures, uses axodraw.sty, few typos correcte
The Impact of Antiretroviral Therapy in a Cohort of HIV Infected Patients Going in and out of the San Francisco County Jail
BackgroundJails are an important venue of HIV care and a place for identification, treatment and referral for care. HIV infected inmates in the San Francisco County jail are offered antiretroviral treatment (ART), which many take only while in jail. We evaluated the effect of ART administration in a cohort of jail inmates going in and out of jail over a nine year period.Methodology/Principal FindingsIn this retrospective study, we examined inmates with HIV going in and out of jail. Inmates were categorized by patterns of ART use: continuous ART - ART both in and out of jail, [...] more likely to have higher VL than inmates on continuous ART. Furthermore, Inmates on intermittent ART and never-on ART lost 1.60; 95%CI (1.06, 2.13) and 1.97; 95%CI (0.96, 3.00) more CD4 cells per month, respectively, compared to continuously treated inmates. The continuous ART inmates gained 0.67CD4 cells/month.Conclusions/SignificanceContinuous ART therapy in jail inmate's benefits CD4 cell counts and control of VL especially compared to those who never took ART. Although jail inmates on intermittent ART were more likely to lose CD4 cells and experience higher VL over time than those on continuous ART, CD4 cell loss was slower in these inmates as compared to inmates never on ART. Further studies are needed to evaluate whether or not intermittent ART provides some benefit in outcome if continuous ART is not possible or likely
CP Violation in Hyperon Nonleptonic Decays within the Standard Model
We calculate the CP-violating asymmetries A(Lambda_-^0) and A(Xi_-^-) in
nonleptonic hyperon decay within the Standard Model using the framework of
heavy-baryon chiral perturbation theory (chiPT). We identify those terms that
correspond to previous calculations and discover several errors in the existing
literature. We present a new result for the lowest-order (in chiPT)
contribution of the penguin operator to these asymmetries, as well as an
estimate for the uncertainty of our result that is based on the calculation of
the leading nonanalytic corrections.Comment: 21 pages, 2 figures; discussion clarified, results & conclusions
unchanged, to appear in Phys. Rev.
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