18 research outputs found
Quantum chaos for nonstandard symmetry classes in the Feingold-Peres model of coupled tops
We consider two coupled quantum tops with angular momentum vectors
and . The coupling Hamiltonian defines the
Feinberg-Peres model which is a known paradigm of quantum chaos. We show that
this model has a nonstandard symmetry with respect to the Altland-Zirnbauer
tenfold symmetry classification of quantum systems which extends the well-known
threefold way of Wigner and Dyson (referred to as `standard' symmetry classes
here). We identify that the nonstandard symmetry classes BD (chiral
orthogonal class with no zero modes), BD (chiral orthogonal class with one
zero mode) and C (antichiral orthogonal class) as well as the standard
symmetry class A (orthogonal class). We numerically analyze the specific
spectral quantum signatures of chaos related to the nonstandard symmetries. In
the microscopic density of states and in the distribution of the lowest
positive energy eigenvalue we show that the Feinberg-Peres model follows the
predictions of the Gaussian ensembles of random-matrix theory in the
appropriate symmetry class if the corresponding classical dynamics is chaotic.
In a crossover to mixed and near-integrable classical dynamics we show that
these signatures disappear or strongly change.Comment: 15 page
Flow chart of articles included in the review.
<p>Flow chart of articles included in the review.</p
chain drug
drug n....over rough country,see, you had to have drugs. I never used two, though,for all I seed people with two - one on each runner. We always had a chain drug - a chain wrapped around the nose o' the sled,see, to drop.... An' that was a great help sometimes when the dogs 'd want to go where you didn't want 'em to go. You drop that drug an' get 'em buckled down to it, an' they'd understand you wanted them to stop.YesDNE-cit J.D.A. WIDDOWSONAUG 1973Used I and SupUsed IUsed
Adjusted odds ratios (OR) for living in an urban environment and obesity using stratification by country/countries, per capita GNI, year of fieldwork, sex, age of study population and criteria for obesity.
<p>Twenty eight studies contributed to 37 independent age and sex adjusted estimates (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0113547#pone-0113547-g001" target="_blank">Figure 1</a>); Reference group is living in a rural environment; GNI gross national income; WC waist circumference;</p><p>* p-value for heterogeneity chi-square;</p><p>** Likelihood ratio test for heterogeneity between subgroup by meta-regression, providing F-ratio and p-values.</p><p>Adjusted odds ratios (OR) for living in an urban environment and obesity using stratification by country/countries, per capita GNI, year of fieldwork, sex, age of study population and criteria for obesity.</p
Association (log odds ratio) between living in an urban environment and obesity by GNI per capita.
<p>Size of circles reflects sample size. Higher log odds ratio (logor) reflect larger effect size for living in an urban environment and obesity; gross national income (GNI) per capita in US dollar corresponding to year and country of fieldwork; Reference group is living in a rural environment.</p
MOESM1 of Sexual health, risky sexual behavior and condom use among adolescents young adults and older adults in Chiang Mai, Thailand: findings from a population based survey
Additional file 1: Table S1. Characteristics of sampled population and source population. Table S2. Relationship status by age group and sex
Additional file 1: of Translation and validation of the PACIC+ questionnaire: the Thai version
Pacicplus. The original PACIC+ questionnaire. (PDF 110 kb
Additional file 2: of Translation and validation of the PACIC+ questionnaire: the Thai version
Thai pacicplus. The Thai version of the PACIC+ questionnaire. (PDF 71 kb
Additional file 1 of Determinants of health care worker breastfeeding experience and practices and their association with provision of care for breastfeeding mothers: a mixed-methods study from Northern Thailand
Supplementary Material 1: Supplementary material includes the interview guide, quantitative survey, study recruitment flow, additional results and sensitivity analysi
Perinatal and neonatal outcomes for twin 1 and twin 2 and singletons.
Perinatal and neonatal outcomes for twin 1 and twin 2 and singletons.</p