Promoting Emotional and Behavioral Health in Preteens: Benchmarks of Success and Challenges Among Programs in Santa Clara and San Mateo Counties

P/PV conducted a two-year study for The Lucile Packard Foundation for Children's Health to assess the effectiveness of the foundation's youth development grantmaking program and to offer lessons for future grantmaking endeavors. The resulting report describes benchmarks of quality programs for youth and strategies for addressing common program challenges

Putting It All Together: Guiding Principles for Quality After-School Programs Serving Preteens

Successfully navigating early adolescence depends, in large part, on the availability of safe and engaging activities and supportive relationships with adults, yet many preteens have limited access to positive supports and opportunities -- such as high-quality after-school programs -- that could put them on a path to success. Funders, policymakers and practitioners share the common goal of supporting strategies that will have the most long-lasting positive effects on young people.Recognizing this, the Lucile Packard Foundation for Children's Health commissioned P/PV to identify the characteristics of quality after-school programs that are linked to positive outcomes for preteens. Based on the latest research and experience in the field, P/PV developed the publication, Putting It All Together: Guiding Principles for Quality After-School Programs Serving Preteens, along with a companion Resource Guide (http://www.lpfch.org/afterschool/resourceguide.html) that includes links to research and tools to strengthen programs.Putting It All Together focuses on six after-school program components associated with positive outcomes for preteens:Focused and Intentional Strategy: Programs have a clear set of goals, target specific skills, and deliberately plan all aspects of the program with a youth development framework in mind.Exposure: Programs are designed to: a) provide preteens with a sufficient number of hours per week over an extended period of time, that matches program outcome goals; and b) allow preteens to attend a variety of activities.Supportive Relationships: Programs emphasize positive adult-youth relationships regardless of the curriculum.Family Engagement: Programs strive to include families through various strategies, such as clear communication and a welcoming environment.Cultural Competence: Programs have diverse staff whose backgrounds are reflective of participants and who create practices and policies that: a) make services available to and inclusive of a variety of populations; and b) help participants understand and value a broad range of cultures.Continuous Program Improvement: Programs strengthen quality through an ongoing and integrated process of targeted staff training, coaching and monitoring, and data collection and analysis.While a host of factors, including organizational capacity, the needs of the youth served and the resources available, all play a role in determining a program's ability to achieve its goals, research suggests that these guiding principles are essential for program quality. That quality, in turn, is the foundation for positive results for youth.NOTE: This version of Putting It All Together contains a full list of endnotes and references, which we chose to omit from hard copies of the report, in the interest of brevity

Evaluation of techniques for removal of spacecraft contaminants from activated carbon

Alternative techniques for the regeneration of carbon contaminated with various spacecraft contaminants were evaluated. Four different modes of regeneration were evaluated: (1) thermal desorption via vacuum, (2) thermal desorption via nitrogen purge, (3) in-situ catalytic oxidation of adsorbed contaminants, and (4) in-situ non-catalytic oxidation of adsorbed contaminants

Launching Literacy in After-School Programs: Early Lessons from the CORAL Initiative

The James Irvine Foundation launched the Communities Organizing Resources to Advance Learning (CORAL) initiative in 1999 with the goal of improving the academic achievement of children in the lowest-performing schools in five California cities. In 2004, CORAL adopted a more targeted approach toward reaching this goal by integrating a regular schedule of literacy instruction into its after-school programs. This interim report, based on research conducted between Fall 2004 and Summer 2005, documents CORALs progress toward implementing high-quality and consistent literacy programming. The report presents early results in terms of youths positive reading gains and describes the program components that appear to have contributed to these gains. It also identifies challenges CORAL sites faced and successful strategies for addressing those challenges

Learning phonological categories

This paper describes in detail several explicit computational methods for approaching such questions in phonology as the vowel/consonant distinction, the nature of vowel harmony systems, and syllable structure, appealing solely to distributional information. Beginning with the vowel/consonant distinction, we consider a method for its discovery by the Russian linguist Sukhotin, and compare it to two newer methods of more general interest, both computational and theoretical, today. The rst is based on spectral decomposition of matrices, allowing for dimensionality reduction in a nely controlled way, and the second is based on nding parameters for maximum likelihood in a hidden Markov model. While all three methods work for discovering the fairly robust vowel/consonant distinction, we extend the newer ones to the discovery of vowel harmony, and in the case of the probabilistic model, to the discovery of some aspects of syllable structure, and o er an evaluation of the results.

DNA-decorated graphene chemical sensors

Graphene is a true two dimensional material with exceptional electronic properties and enormous potential for practical applications. Graphene's promise as a chemical sensor material has been noted but there has been relatively little work on practical chemical sensing using graphene, and in particular how chemical functionalization may be used to sensitize graphene to chemical vapors. Here we show one route towards improving the ability of graphene to work as a chemical sensor by using single stranded DNA as a sensitizing agent. The resulting broad response devices show fast response times, complete and rapid recovery to baseline at room temperature, and discrimination between several similar vapor analytes.Comment: 7 pages, To appear in Applied Physics Letter

Contaminant removal from enclosed atmospheres by regenerable adsorbents

A system for removing contaminants from spacecraft atmospheres was studied, which utilizes catalyst-impregnated activated carbon followed by in-situ regeneration by low-temperature catalytic oxidation of the adsorbed contaminants. Platinum was deposited on activated carbon by liquid phase impregnation with chloroplatinic acid, followed by drying and high-temperature reduction. Results were obtained for the seven selected spacecraft contaminants by means of three experimental test systems. The results indicate that the contaminants could be removed by oxidation with very little loss in adsorptive capacity. The advantages of a catalyst-impregnated carbon for oxidative regeneration are found to be significant enough to warrent its use

Striations in the Taurus molecular cloud: Kelvin-Helmholtz instability or MHD waves?

The origin of striations aligned along the local magnetic field direction in the translucent envelope of the Taurus molecular cloud is examined with new observations of 12CO and 13CO J=2-1 emission obtained with the 10~m submillimeter telescope of the Arizona Radio Observatory. These data identify a periodic pattern of excess blue and redshifted emission that is responsible for the striations. For both 12CO and 13CO, spatial variations of the J=2-1 to J=1-0 line ratio are small and are not spatially correlated with the striation locations. A medium comprised of unresolved CO emitting substructures (cells) with a beam area filling factor less than unity at any velocity is required to explain the average line ratios and brightness temperatures. We propose that the striations result from the modulation of velocities and the beam filling factor of the cells as a result of either the Kelvin-Helmholtz instability or magnetosonic waves propagating through the envelope of the Taurus molecular cloud. Both processes are likely common features in molecular clouds that are sub-Alfvenic and may explain low column density, cirrus-like features similarly aligned with the magnetic field observed throughout the interstellar medium in far-infrared surveys of dust emission.Comment: 11 pages, 4 figures. Accepted for publication in MNRA

CO mapping of the Orion molecular cloud: The influence of star formation on cloud structure

Regions of massive star formation have long been believed to have a profound influence on the structure of their surrounding molecular clouds. The ways in which massive star formation has altered the structure and kinematics of the Orion Molecular Cloud are discussed. The data to be discussed consists of a large scale map of the CO J=1-0 emission from approximately 3 square degrees of OMC-1. During 1985, the Five College Radio Astronomy Observatory 14M antenna was used to map a 2 deg x 1 deg region centered on alpha(1950) = 5(h)33(m)00(s) delta(1950) = -5 deg 30 min. The region mapped in 1985 covers the well known HII regions M42, M43, and NGC1977, and the CO map contains abundant evidence of the interaction between these regions and the molecular cloud. Indeed, the global structure of the cloud appears to have been strongly influenced by the continuous formation of massive stars within the cloud. Individual instances of some of these features are discussed. There appear to be two classes of features which are indicative of this interaction: CO bright rims and CO holes. During 1986, we have undertaken further mapping of OMC-1 to the south of the region covered by the 1985 map. This portion of the cloud contains significant regions of star formation, but O star formation has not occured and large HII regions have not developed to alter the appearance of the cloud. A detailed map of this region is thus an opportunity to view the structure of the molecular cloud before it has been altered by massive star formation. Preliminary analysis of data obtained in this region suggests that the structure and kinematics of the southern portion of the Orion cloud are indeed dramatically different from those of the region previously mapped. Comparison of the two regions thus supports models of the development of structure in molecular clouds through interaction with the HII regions formed within them

Heterogeneity in susceptibility dictates the order of epidemiological models

The fundamental models of epidemiology describe the progression of an infectious disease through a population using compartmentalized differential equations, but do not incorporate population-level heterogeneity in infection susceptibility. We show that variation strongly influences the rate of infection, while the infection process simultaneously sculpts the susceptibility distribution. These joint dynamics influence the force of infection and are, in turn, influenced by the shape of the initial variability. Intriguingly, we find that certain susceptibility distributions (the exponential and the gamma) are unchanged through the course of the outbreak, and lead naturally to power-law behavior in the force of infection; other distributions often tend towards these "eigen-distributions" through the process of contagion. The power-law behavior fundamentally alters predictions of the long-term infection rate, and suggests that first-order epidemic models that are parameterized in the exponential-like phase may systematically and significantly over-estimate the final severity of the outbreak