Spin-3 Chromium Bose-Einstein Condensates

We analyze the physics of spin-3 Bose-Einstein condensates, and in particular the new physics expected in on-going experiments with condensates of Chromium atoms. We first discuss the ground-state properties, which, depending on still unknown Chromium parameters, and for low magnetic fields can present various types of phases. We also discuss the spinor-dynamics in Chromium spinor condensates, which present significant qualitative differences when compared to other spinor condensates. In particular, dipole-induced spin relaxation may lead for low magnetic fields to transfer of spin into angular momentum similar to the well-known Einstein-de Haas effect. Additionally, a rapid large transference of population between distant magnetic states becomes also possible.Comment: 4 pages, 3 eps figures. Error in the previous version correcte

Gift from the gods: a Balinese guide to early child rearing

Book ChapterThe influence of Western schools and other imports notwithstanding, many child-rearing practices recorded earlier in the century [in Indonesia] are still observable, especially those concerning infants and young children. For the "manual" that follows, I propose as the fictive author a male healer, or balian, who is trained in traditional Balinese healing arts to cure diseases of both physical and spiritual origins

Dynamical mean-field equations for strongly interacting fermionic atoms in a potential trap

We derive a set of dynamical mean-field equations for strongly interacting fermionic atoms in a potential trap across a Feshbach resonance. Our derivation is based on a variational ansatz, which generalizes the crossover wavefunction to the inhomogeneous case, and the assumption that the order parameter is slowly varying over the size of the Cooper pairs. The equations reduce to a generalized time-dependent Gross-Pitaevskii equation on the BEC side of the resonance. We discuss an iterative method to solve these mean-field equations, and present the solution for a harmonic trap as an illustrating example to self-consistently verify the approximations made in our derivation.Comment: replaced with the published versio

Fermion Superfluids of Non-Zero Orbital Angular Momentum near Resonance

We study the pairing of Fermi gases near the scattering resonance of the $\ell\neq 0$ partial wave. Using a model potential which reproduces the actual two-body low energy scattering amplitude, we have obtained an analytic solution of the gap equation. We show that the ground state of $\ell=1$ and $\ell=3$ superfluid are orbital ferromagnets with pairing wavefunctions $Y_{11}$ and $Y_{32}$ respectively. For $\ell=2$, there is a degeneracy between $Y_{22}$ and a "cyclic state". Dipole energy will orient the angular momentum axis. The gap function can be determined by the angular dependence of the momentum distribution of the fermions.Comment: 4 pages, 1 figur

Paired state in an integrable spin-1 boson model

An exactly solvable model describing the low density limit of the spin-1 bosons in a one-dimensional optical lattice is proposed. The exact Bethe ansatz solution shows that the low energy physics of this system is described by a quantum liquid of spin singlet bound pairs. Motivated by the exact results, a mean-field approach to the corresponding three-dimensional system is carried out. Condensation of singlet pairs and coexistence with ordinary Bose-Einstein condensation are predicted.Comment: 6 pages, 1 figure, Revised versio

Role of prenatal expectations in parents' reports of infant temperament

Journal ArticleThe associations were examined among parents' characteristics, their prenatal expectations for and postpartum perceptions of infant temperament, and observers' ratings of temperament. During pregnancy and at 3 months postpartum, 70 primiparous women and their husbands completed several mood and anxiety questionnaires. Women completed prenatally Tellegen's Multidimensional Personality Questionnaire

Kindergarten readiness and performance of Latino children participating in Reach Out and Read

Journal ArticleBackground: Literacy is a vital skill that forms the basis for academic, occupational, and social success. Minority populations, especially immigrant Latinos in the US, have achievement gaps in literacy when compared to the White population. The Reach Out and Read (ROR) program is a pediatric, primary-care intervention designed to promote emergent literacy skills. The objectives of this study were to provide descriptive information at kindergarten on Latino immigrant children's emergent literacy skills and home literacy environments, and correlation data between ROR exposure and emergent literacy skills. Method: A sample of 40 low-income Latino immigrant mothers and their children participated. Medical records were reviewed to determine level of ROR exposure. Home literacy environment was assessed through maternal interview. Children's emergent literacy skills were assessed before kindergarten through interviews with the children and with the Dynamic Indicators of Basic Early Literacy Skills (DIBELS), and at the end of kindergarten through teachers' reports based on a modified version of the Kindergarten Teacher Questionnaire - Part C from the Department of Education Early Childhood Longitudinal Study-K (ECLS-K). We completed descriptive analyses for the demographics of our sample, ROR exposure, home literacy environment, emergent literacy skills and teacher evaluations. We created composite scores of children's print awareness, teacher-rated literacy skills, and ROR exposure. Finally, partial correlations controlling for child age and maternal education were conducted between the composite score of ROR exposure and children's literacy skills as assessed by the child interview, the DIBELS test, and teacher-report. Child age and maternal education were controlled. Results: The majority of children evaluated came from two-parent households and had high compliance rates with well-child care. All children began ROR at 6 months; the mean number of ROR books received was 6. Home literacy environments of families were strong as demonstrated by book ownership and parent-reported adult-child reading. Evaluation of early literacy skills in the clinic demonstrated children had good familiarity with print, and greater ROR exposure was related to significantly greater print and phonemic awareness before kindergarten entry. DIBELS testing performed in the clinic setting identified 37%-45%of the children as at risk for reading difficulty prior to kindergarten. At the end of kindergarten, teachers reported ECLS-K identifying 60% of children as intermediate or proficient in reading and rated the literacy skills of 77% of the children exposed to ROR as average, above average, or far above average when compared to all students of the same grade. Discussion: The kindergarten literacy performance of this small sample of Latino children participating in the ROR program from infancy was good. Though these children were living in poverty and had other risk factors for poor-school performance, they had good home literacy environments and average or above average literacy skills by the end of kindergarten. Protective factors including family stability, well-child care, and early and consistent participation in the ROR program may have improved the school readiness of these high-risk children

Attachment security among mothers and their young children living in poverty: associations with maternal, child, and contextual characteristics

Journal ArticleIn order to extend previous research and inform intervention programs, the goal of the present study was to further understand variability in mother-child attachment security among high-risk families living in poverty. Mothers (65% Hispanic) and their young children who were in a home visitor program (n = 74) to connect families with basic services or who were on the waiting list (n = 27) for the program were visited at home

Local and global properties of conformally flat initial data for black hole collisions

We study physical properties of conformal initial value data for single and binary black hole configurations obtained using conformal-imaging and conformal-puncture methods. We investigate how the total mass M_tot of a dataset with two black holes depends on the configuration of linear or angular momentum and separation of the holes. The asymptotic behavior of M_tot with increasing separation allows us to make conclusions about an unphysical ``junk'' gravitation field introduced in the solutions by the conformal approaches. We also calculate the spatial distribution of scalar invariants of the Riemann tensor which determine the gravitational tidal forces. For single black hole configurations, these are compared to known analytical solutions. Spatial distribution of the invariants allows us to make certain conclusions about the local distribution of the additional field in the numerical datasets