To Help and to Learn: An Exploratory Study of Peer Tutors Teaching Older Adults about Technology

The cost of caring for an aging population is a growing concern in many societies. Although information and communication technologies (ICTs) like computers and the Internet are seen as new tools which offer some potential to help, unfortunately older adults are generally the age group with the lowest level of skill and utilization of these technologies. Although nongovernmental organizations have attempted to address this digital gap, limited staff resources are a concern. One approach for generating additional staff to provide more technology training to older adults is a "peer-tutor" model. This study examined the perspectives of 101 technology peer tutors for older adults in a nonprofit program in Hong Kong. Topics included preparation and training, perceived benefits and challenges, side effects on their lives, the perceived value of their work as tutors, and suggestions for personal and program improvement. The influence of demographic factors was examined. Results show which tutors felt prepared for their roles, perceived considerably more benefits than challenges, saw value in their tutor work, and overwhelming plan to continue as volunteer tutors in this program. There were few differences linked with demographic variables. Implications for practice and for future research are considered. © 2010 Copyright Taylor and Francis Group, LLC.link_to_subscribed_fulltex

Random Coil to Globular Thermal Response of a Protein (H3.1) with Three Knowledge-Based Coarse-Grained Potentials

The effect of temperature on the conformation of a histone (H3.1) is studied by a coarse-grained Monte Carlo simulation based on three knowledge-based contact potentials (MJ, BT, BFKV). Despite unique energy and mobility profiles of its residues, the histone H3.1 undergoes a systematic (possibly continuous) structural transition from a random coil to a globular conformation on reducing the temperature. The range over which such a systematic response in variation of the radius of gyration (R(g)) with the temperature (T) occurs, however, depends on the potential, i.e. ΔT(MJ) ≈ 0.013–0.020, ΔT(BT) ≈ 0.018–0.026, and ΔT(BFKV) ≈ 0.006–0.013 (in reduced unit). Unlike MJ and BT potentials, results from the BFKV potential show an anomaly where the magnitude of R(g) decreases on raising the temperature in a range ΔT(A) ≈ 0.015–0.018 before reaching its steady-state random coil configuration. Scaling of the structure factor, S(q) ∝ q(−1/ν), with the wave vector, q = 2π/λ, and the wavelength, λ, reveals a systematic change in the effective dimension (D(e)∼1/ν) of the histone with all potentials (MJ, BT, BFKV): D(e)∼3 in the globular structure with D(e)∼2 for the random coil. Reproducibility of the general yet unique (monotonic) structural transition of the protein H3.1 with the temperature (in contrast to non-monotonic structural response of a similar but different protein H2AX) with three interaction sets shows that the knowledge-based contact potential is viable tool to investigate structural response of proteins. Caution should be exercise with the quantitative comparisons due to differences in transition regimes with these interactions