The Relationship Between Phonemic Awareness And Preschool Children\u27S Literacy Activities

The purpose of the current study was to investigate the relationship between preschool children\u27s phonemic awareness and the literacy activities in which they choose to engage. Children (N=l4) in the study were observed twice weekly for 12 weeks in the normal preschool environment. Data collection was divided into two phases. The first phase consisted of watching one child at a time for 15 minutes and recording everything that child did during that time. The next phase c~ data collection consisted of watching the entire class and indicating on checklists what the children were doing during free play, circle time, and library time. This information allowed for frequency counts indicating what activities the children most frequently chose=~ engage in. Data was analyzed using the constant comparative method (Glaser & Strauss, 1967). Two researchers reviewed all field notes on several occasions to develop categories of literacy activities. These categories were developed and defined based on the activities of the children. Data were analyzed for each category, for each individual child, for the entire class, and for children with high and low phonemic awareness. Results indicated that children with high phonemic awareness were observed to engage in fewer literacy activities than children with low phonemic awareness. The children with low phonemic awareness engaged in the most literacy activities of all the children in the class. Recommendations for future research in regards to phonemic awareness and emergent literacy are provided

Nature of the electronic states involved in the chemical bonding and superconductivity at high pressure in SnO

We have investigated the electronic structure and the Fermi surface of SnO using density functional theory (DFT) calculations within recently proposed exchange-correlation potential (PBE+mBJ) at ambient conditions and high pressures up to 19.3 GPa where superconductivity was observed. It was found that the Sn valence states 5s, 5p, and 5d are strongly hybridized with the O 2p-states, and that our DFT-calculations are in good agreement with O K-edge X-ray spectroscopy measurements for both occupied and empty states. It was demonstrated that the metallic states appearing under pressure in the semiconducting gap stem due to the transformation of the weakly hybridized O 2p-Sn 5sp subband corresponding to the lowest valence state of Sn in SnO. We discuss the nature of the electronic states involved in chemical bonding and formation of the hole and electron pockets with nesting as a possible way to superconductivity.Comment: 5 pages, 6 figure

Azimuthal anisotropy in Au+Au collisions at sqrtsNN = 200 GeV

The results from the STAR Collaboration on directed flow (v_1), elliptic flow (v_2), and the fourth harmonic (v_4) in the anisotropic azimuthal distribution of particles from Au+Au collisions at sqrtsNN = 200 GeV are summarized and compared with results from other experiments and theoretical models. Results for identified particles are presented and fit with a Blast Wave model. Different anisotropic flow analysis methods are compared and nonflow effects are extracted from the data. For v_2, scaling with the number of constituent quarks and parton coalescence is discussed. For v_4, scaling with v_2^2 and quark coalescence is discussed.Comment: 26 pages. As accepted by Phys. Rev. C. Text rearranged, figures modified, but data the same. However, in Fig. 35 the hydro calculations are corrected in this version. The data tables are available at http://www.star.bnl.gov/central/publications/ by searching for "flow" and then this pape

Azimuthal anisotropy in Au+Au collisions at √s\u3csub\u3eNN\u3c/sub\u3e = 200 GeV

The results from the STAR Collaboration on directed flow (ν1), elliptic flow (ν2), and the fourth harmonic (ν4) in the anisotropic azimuthal distribution of particles from Au+Au collisions at √sNN=200GeV are summarized and compared with results from other experiments and theoretical models. Results for identified particles are presented and fit with a blast-wave model. Different anisotropic flow analysis methods are compared and nonflow effects are extracted from the data. For ν2, scaling with the number of constituent quarks and parton coalescence are discussed. For ν4, scaling with v22 and quark coalescence are discussed

Small-sample studies on right censored data with discrete failure times

Kaplan–Meier estimator, Greenwood formula, Discrete data, Survival analysis,