Youth and Adult Perceptions of Their Relationships Within Community-Based Youth Programs

This study examined perceptions and experiences of youth and adults engaged in various types of community-based youth-adult relationships. Involvement and interaction rating scales were completed by 108 participants involved in community groups from 12 communities in 10 states. The rating scale measured three constructs: youth involvement, adult involvement, and youth- adult interaction. Significant gender differences in participants’ perceptions were found on all three constructs, with females being more positive. Rural participants were found to be significantly more positive than urban participants on the construct of youth involvement. Finally, significant differences were found between all participants within categories of the youth-adult relationship continuum. Participants in youth-led collaborations were significantly more positive toward youth involvement than participants in adult-led collaborations. Moreover, adults in youth-adult partnerships were significantly more positive toward youth involvement and youth-adult interaction than those adults in adult-led collaborations

CAYDO: Connecting the Gaps of Community Youth Assessments

Community-based assessments can be strategies that aim to work in partnership with individuals and organizations to empower communities. Often identified as a comparable alternative to needs assessments, Community YouthMapping has been developed to include youth in the community youth development process. However, the authors note significant gaps in Community YouthMapping and offer a new assessment technique that includes an adapted youth mapping process, Comprehensive Assessment of Youth Development Opportunities (CAYDO). This article takes an investigative look at the relevance of including this procedure as a needs assessment tool in the program planning and community development process

Determining the Quality of Youth-Adult Relationships Within Community-Based Youth Programs

There is a lack of research on assessing how society views youth voice and participation in youth programs. Youth taking on leadership roles and interacting with adults have shown success in establishing positive youth-adult relationships. This article introduces the Involvement and Interaction Rating Scale, a new measure that assesses the perceptions and experiences of youth and adult participants working together in various community-based efforts. The scale serves as a means to empower participants by enabling them to evaluate their own experiences to determine the quality of these experiences and acknowledge areas that need strengthening

Temporal Evolution of Financial Market Correlations

We investigate financial market correlations using random matrix theory and principal component analysis. We use random matrix theory to demonstrate that correlation matrices of asset price changes contain structure that is incompatible with uncorrelated random price changes. We then identify the principal components of these correlation matrices and demonstrate that a small number of components accounts for a large proportion of the variability of the markets that we consider. We then characterize the time-evolving relationships between the different assets by investigating the correlations between the asset price time series and principal components. Using this approach, we uncover notable changes that occurred in financial markets and identify the assets that were significantly affected by these changes. We show in particular that there was an increase in the strength of the relationships between several different markets following the 2007--2008 credit and liquidity crisis.Comment: 15 pages, 10 figures, 1 table. Accepted for publication in Phys. Rev. E. v2 includes additional section

Particle Acceleration in Supernova Remnants and the Production of Thermal and Nonthermal Radiation

If highly efficient, cosmic ray production can have a significant effect on the X-ray emission from SNRs as well as their dynamical evolution. Using hydrodynamical simulations including diffusive shock acceleration, we produce spectra for both the thermal and nonthermal forward shock emission. For a given ambient density and explosion energy, we find that the position of the forward shock at a given age is a strong function of the acceleration efficiency, providing a signature of cosmic-ray production. Using an approximate treatment for the ionization state of the plasma, we investigate the effects of slow vs. rapid heating of the postshock electrons on the ratio of thermal to nonthermal X-ray emission at the forward shock. We also investigate the effects of magnetic field strength on the observed spectrum for efficient cosmic-ray acceleration. The primary effect of a large field is a considerable flattening of the nonthermal spectrum in the soft X-ray band. Spectral index measurements from X-ray observations may thus be indicators of the postshock magnetic field strength. The predicted gamma-ray flux from inverse-Compton (IC) scattering and neutral pion decay is strongly affected by the ambient conditions and, for the particular parameters used in our examples, the IC emission at E ~ 1 TeV exceeds that from pion decay, although at both lower and higher energies this trend is reversed for cases of high ambient density. More importantly, high magnetic fields produce a steepening of the electron spectrum over a wide energy range which may make it more difficult to differentiate between IC and pion-decay emission solely by spectral shape.Comment: 30 pages, 12 figures, submitted to ApJ January 200

Lipid coated liquid crystal droplets for the on-chip detection of antimicrobial peptides

We describe a novel biosensor based on phospholipid-coated nematic liquid crystal (LC) droplets and demonstrate the detection of Smp43, a model antimicrobial peptide (AMP) from the venom of North African scorpion Scorpio maurus palmatus. Mono-disperse lipid-coated LC droplets of diameter 16.7 ± 0.2 μm were generated using PDMS microfluidic devices with a flow-focusing configuration and were the target for AMPs. The droplets were trapped in a bespoke microfluidic trap structure and were simultaneously treated with Smp43 at gradient concentrations in six different chambers. The disruption of the lipid monolayer by the Smp43 was detected (<6 μM) at concentrations well within its biologically active range, indicated by a dramatic change in the appearance of the droplets associated with the transition from a typical radial configuration to a bipolar configuration, which is readily observed by polarizing microscopy. This suggests the system has feasibility as a drug-discovery screening tool. Further, compared to previously reported LC droplet biosensors, this LC droplet biosensor with a lipid coating is more biologically relevant and its ease of use in detecting membrane-related biological processes and interactions has the potential for development as a reliable, low-cost and disposable point of care diagnostic tool

Corporate Social Responsibility and NGO Activity in China and India: A Comparative Study of Corporate Website Reporting

It is well recognised that CSR is not a uniformly homogenous concept. Rather, it varies between countries and supra-national regions. This work compares the salience and role of NGOs as agents for influencing the uptake and focus of CSR in China and India. Four hypotheses are addressed: i) Companies in India are more likely to engage with their stakeholders than are companies in China, ii) NGOs act as more salient stakeholders in India than in China, and thus are more capable of influencing CSR engagement, iii) Differences in the institutional environments cause different patterns of CSR to emerge in China and India, and iv) These institutional differences also define the difference in NGO salience. Data was collected using a quantitative content analysis of fifty corporate websites from each of China and India. It was found that CSR does vary considerably between China and India, and this variance can be largely explained by the different institutional environments. Companies in India were found to be more likely to engage with their stakeholders, and to recognise a wider range of stakeholders than do companies in China. Also, NGOs were found to be more salient stakeholders in India than China. The work concludes that the differences in the institutional environments and NGO salience has lead to CSR being more systematic and institutionalised in India than in China, progressing beyond the traditional notion of corporate philanthropy. However, some evidence is found to suggest that NGOs are becoming more salient in China, and as more companies in China recognise NGOs as important stakeholders, it can be expected that similar advancement in CSR will follow. Key Terms: Corporate Social Responsibility (CSR); Comparative; China; India; Non-Governmental Organisations (NGOs)