Multimodal Media Production: New Landscapes For Crafting Future Selves

This article outlines a framework for using multimodal media production (MMP) with urban youth to sketch critical future selves that are collaborative, self-confident, college going, and resilient.  Particularly today with the affordances of digital technologies, MMPs of alternative narratives by youth of color allow a particularly rich form of imagining and exploring different times and spaces, while also developing critical literacies, skills, and dispositions that allow them to actualize affirmative futures.

Búsqueda de pulsos provenientes del centro galáctico

Se observo el centro galáctico en 11 cm. durante algunos meses para tratar de detectar pulsos radioeléctricos provenientes de él que podían estar asociados con eventos gravitacionales, los cuales han sido detectados por Weber (Physical Review Letters, 25, pág. 180, 1970). Se han detectado pulsos intensos pero no parecen estar correlacionados con los observados en otros radio observatoriosAsociación Argentina de Astronomí

Búsqueda de pulsos provenientes del centro galáctico

Se observo el centro galáctico en 11 cm. durante algunos meses para tratar de detectar pulsos radioeléctricos provenientes de él que podían estar asociados con eventos gravitacionales, los cuales han sido detectados por Weber (Physical Review Letters, 25, pág. 180, 1970). Se han detectado pulsos intensos pero no parecen estar correlacionados con los observados en otros radio observatoriosAsociación Argentina de Astronomí

Búsqueda de pulsos provenientes del centro galáctico

Se observo el centro galáctico en 11 cm. durante algunos meses para tratar de detectar pulsos radioeléctricos provenientes de él que podían estar asociados con eventos gravitacionales, los cuales han sido detectados por Weber (Physical Review Letters, 25, pág. 180, 1970). Se han detectado pulsos intensos pero no parecen estar correlacionados con los observados en otros radio observatoriosAsociación Argentina de Astronomí

Oxide formation at the surface of late 4d transition metals: Insights from first-principles atomistic thermodynamics

Using density-functional theory we assess the stability of bulk and surface oxides of the late 4d transition metals in a ``constrained equilibrium'' with a gas phase formed of O2 and CO. While the stability range of the most stable bulk oxide extends for ruthenium well into gas phase conditions representative of technological CO oxidation catalysis, this is progressively less so for the 4d metals to its right in the periodic system. Surface oxides could nevertheless still be stable under such conditions. These thermodynamic considerations are discussed in the light of recent experiments, emphasizing the role of (surface) oxides as the active phase of model catalysts formed from these metals.Comment: 7 pages including 3 figures, Related publications can be found at http://www.fhi-berlin.mpg.de/th/paper.htm

Pilot protocol for the Parent and Infant Inter (X)action Intervention (PIXI) feasibility study

This paper provides the detailed protocol for a pilot study testing the feasibility, acceptability, and initial efficacy of a targeted two-phase, remotely delivered early intervention program for infants with neurogenetic conditions (NGC) and their caregivers. The Parent and Infant Inter(X)action Intervention (PIXI) is designed to support parents and infants with a NGC diagnosed in the first year of life. PIXI is implemented in two phases, with the first phase focusing on psychoeducation, parent support, and how to establish routines for supporting infant development. Phase II helps parents learn targeted skills to support their infant's development as symptoms may begin to emerge. The proposed non-randomized feasibility pilot study will establish the feasibility of a year-long virtually implemented intervention program to support new parents of an infant diagnosed with an NGC

Anisotropic optical response of the diamond (111)-2x1 surface

The optical properties of the 2$\times$1 reconstruction of the diamond (111) surface are investigated. The electronic structure and optical properties of the surface are studied using a microscopic tight-binding approach. We calculate the dielectric response describing the surface region and investigate the origin of the electronic transitions involving surface and bulk states. A large anisotropy in the surface dielectric response appears as a consequence of the asymmetric reconstruction on the surface plane, which gives rise to the zigzag Pandey chains. The results are presented in terms of the reflectance anisotropy and electron energy loss spectra. While our results are in good agreement with available experimental data, additional experiments are proposed in order to unambiguously determine the surface electronic structure of this interesting surface.Comment: REVTEX manuscript with 6 postscript figures, all included in uu file. Also available at http://www.phy.ohiou.edu/~ulloa/ulloa.html Submitted to Phys. Rev.

Plane-symmetric inhomogeneous magnetized viscous fluid universe with a variable Λ\Lambda

The behavior of magnetic field in plane symmetric inhomogeneous cosmological models for bulk viscous distribution is investigated. The coefficient of bulk viscosity is assumed to be a power function of mass density $(\xi =\xi_{0}\rho^{n})$. The values of cosmological constant for these models are found to be small and positive which are supported by the results from recent supernovae Ia observations. Some physical and geometric aspects of the models are also discussed.Comment: 18 pages, LaTex, no figur

A Better Way to Reconstruct Dark Energy Models ?

To reconstruct dark energy models the redshift $z_{eq}$, marking the end of radiation era and the beginning of matter-dominated era, can play a role as important as $z_{t}$, the redshift at which deceleration parameter experiences a signature flip. To implement the idea we propose a variable equation of state for matter that can bring a smooth transition from radiation to matter-dominated era in a single model. A popular $\Lambda \propto \rho$ dark energy model is chosen for demonstration but found to be unacceptable. An alternative $\Lambda \propto \rho a^{3}$ model is proposed and found to be more close to observation.Comment: 17 pages, 5 figures Accepted for publication in `Astrophysics and Space Science

Toward an internally consistent astronomical distance scale

Accurate astronomical distance determination is crucial for all fields in astrophysics, from Galactic to cosmological scales. Despite, or perhaps because of, significant efforts to determine accurate distances, using a wide range of methods, tracers, and techniques, an internally consistent astronomical distance framework has not yet been established. We review current efforts to homogenize the Local Group's distance framework, with particular emphasis on the potential of RR Lyrae stars as distance indicators, and attempt to extend this in an internally consistent manner to cosmological distances. Calibration based on Type Ia supernovae and distance determinations based on gravitational lensing represent particularly promising approaches. We provide a positive outlook to improvements to the status quo expected from future surveys, missions, and facilities. Astronomical distance determination has clearly reached maturity and near-consistency.Comment: Review article, 59 pages (4 figures); Space Science Reviews, in press (chapter 8 of a special collection resulting from the May 2016 ISSI-BJ workshop on Astronomical Distance Determination in the Space Age