66 research outputs found
Topological charge on the lattice: a field theoretical view of the geometrical approach
We construct sequences of ``field theoretical'' (analytical) lattice
topological charge density operators which formally approach geometrical
definitions in 2-d models and 4-d Yang Mills theories. The
analysis of these sequences of operators suggests a new way of looking at the
geometrical method, showing that geometrical charges can be interpreted as
limits of sequences of field theoretical (analytical) operators. In
perturbation theory renormalization effects formally tend to vanish along such
sequences. But, since the perturbative expansion is asymptotic, this does not
necessarily lead to well behaved geometrical limits. It indeed leaves open the
possibility that non-perturbative renormalizations survive.Comment: 14 pages, revte
Strong-coupling expansion of lattice O(N) sigma models
We report progress in the computation and analysis of strong-coupling series
of two- and three-dimensional models. We show that,
through a combination of long strong-coupling series and judicious choice of
observables, one can compute continuum quantities reliably and with a precision
at least comparable with the best available Monte Carlo data.Comment: 4 pages, compressed uuencoded PostScript, Contribution to Lattice 9
Renormalization group flow of SU(3) lattice gauge theory - Numerical studies in a two coupling space
We investigate the renormalization group (RG) flow of SU(3) lattice gauge
theory in a two coupling space with couplings and
corresponding to and loops respectively. Extensive
numerical calculations of the RG flow are made in the fourth quadrant of this
coupling space, i.e., and . Swendsen's factor two
blocking and the Schwinger-Dyson method are used to find an effective action
for the blocked gauge field. The resulting renormalization group flow runs
quickly towards an attractive stream which has an approximate line shape. This
is numerical evidence of a renormalized trajectory which locates close to the
two coupling space. A model flow equation which incorporates a marginal
coupling (asymptotic scaling term), an irrelevant coupling and a
non-perturbative attraction towards the strong coupling limit reproduces
qualitatively the observed features. We further examine the scaling properties
of an action which is closer to the attractive stream than the currently used
improved actions. It is found that this action shows excellent restoration of
rotational symmetry even for coarse lattices with fm.Comment: 18 pages with 9 eps figures psfig.sty, typos correcte
Dynamical Scaling from Multi-Scale Measurements
We present a new measure of the Dynamical Critical behavior: the "Multi-scale
Dynamical Exponent (MDE)"Comment: 9 pages,Latex, Request figures from [email protected]
Workplace Contextual Supports for LGBT Employees: A Review, MetaâAnalysis, and Agenda for future Research
The past decade has witnessed a rise in the visibility of the lesbian, gay, bisexual, and transgender (LGBT) community. This has resulted in some organizational researchers focusing their attention on workplace issues facing LGBT employees. While empirical research has been appropriately focused on examining the impact of workplace factors on the work lives of LGBT individuals, no research has examined these empirical relationships cumulatively. The purpose of this study was to conduct a comprehensive review and metaâanalysis of the outcomes associated with three workplace contextual supports (formal LGBT policies and practices, LGBTâsupportive climate, and supportive workplace relationships) and to compare the relative influence of these workplace supports on outcomes. Outcomes were grouped into four categories: (a) work attitudes, (b) psychological strain, (c) disclosure, and (d) perceived discrimination. Results show that supportive workplace relationships were more strongly related to work attitudes and strain, whereas LGBT supportive climate was more strongly related to disclosure and perceived discrimination compared to the other supports. Our findings also revealed a number of insights concerning the measurement, research design, and sample characteristics of the studies in the present review. Based on these results, we offer an agenda for future research
Medication Use Patterns among Urban Youth Participating in School-Based Asthma Education
Although pharmaceutical management is an integral part of asthma control, few community-based analyses have focused on this aspect of disease management. The primary goal of this analysis was to assess whether participation in the school-based Kickinâ Asthma program improved appropriate asthma medication use among middle school students. A secondary goal was to determine whether improvements in medication use were associated with subsequent improvements in asthma-related symptoms among participating students. Students completed an in-class case-identification questionnaire to determine asthma status. Eligible students were invited to enroll in a school-based asthma curriculum delivered over four sessions by an asthma health educator. Students completed a pre-survey and a 3-month follow-up post-survey that compared symptom frequency and medication use. From 2004 to 2007, 579 participating students completed pre- and post-surveys. Program participation resulted in improvements in appropriate use across all three medication use categories: 20.0% of students initiated appropriate reliever use when âfeeling symptomsâ (pâ<â0.001), 41.6% of students reporting inappropriate medication use âbefore exerciseâ initiated reliever use (pâ<â0.001), and 26.5% of students reporting inappropriate medication use when âfeeling fineâ initiated controller use (pâ<â0.02). More than half (61.6%) of participants reported fewer symptoms at post-survey. Symptom reduction was not positively associated with improvements in medication use in unadjusted and adjusted analysis, controlling for sex, asthma symptom classification, class attendance, season, and length of follow-up. Participation in a school-based asthma education program significantly improved reliever medication use for symptom relief and prior-to-exercise and controller medication use for maintenance. However, given that symptom reduction was not positively associated with improvement in medication use, pharmaceutical education must be just one part of a comprehensive asthma management agenda that addresses the multifactorial nature of asthma-related morbidity
Employment Discrimination Based on Sexual Orientation and Gender Identity in Ohio
Approximately 212,000 LGBT workers in Ohio are vulnerable to employment discrimination absent state or federal legal protections. At least 13 localities in Ohio prohibit employment discrimination against LGBT people, yet 81 percent of the workforce remains unprotected by local ordinances. A statewide non-discrimination law would result in 100 additional complaints being filed with the Ohio Civil Rights Commission each year. The cost of enforcing the additional complaints would be negligible. At most, it would cost the state approximately $214,500 annually; only 2.8 percent of the Ohio Civil Rights Commissionâs annual budget
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Employment Discrimination Based on Sexual Orientation and Gender Identity in Ohio
Approximately 212,000 LGBT workers in Ohio are vulnerable to employment discrimination absent state or federal legal protections. At least 13 localities in Ohio prohibit employment discrimination against LGBT people, yet 81 percent of the workforce remains unprotected by local ordinances. A statewide non-discrimination law would result in 100 additional complaints being filed with the Ohio Civil Rights Commission each year. The cost of enforcing the additional complaints would be negligible. At most, it would cost the state approximately $214,500 annually; only 2.8 percent of the Ohio Civil Rights Commissionâs annual budget
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HIV Criminalization in Georgia:Â Penal implications for people living with HIV/AIDS
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