New Face of Work Survey

Documents why Americans in their 50s and 60s plan to work longer than the previous generation. Includes attitudes about post-retirement work based on gender and race, and support for policy changes to remove obstacles to working past retirement age

The Kindness of Strangers: Reflections on the Mentoring Movement

This review of the mentoring phenomenon throughout the US was originally issued as a report by P/PV. The author's greatly expanded version was published as a book by Jossey-Bass/Macmillan in Fall 1993

Partners in Growth: Elder Mentors and At-Risk Youth

Gus Papageorge, whom you\u27ll soon meet in this report, is the pseudonym for a retired leatherworker who tries to help youthful offenders find jobs and get established in society. His method is simple and direct: he talks to the kids, spends time with them, opens his own life to them. Give [the kid] your telephone number, he says. If he gets in trouble, tell him, \u27Let me know what\u27s happening, maybe I can be a help. \u2

Fostering Intergenerational Relatiollships for At-Risk Youth

Many at-risk youth are growing up isolated from the range of caring and consistent adult relationships so important for navigating the treacherous course from adolescence to adulthood. An accumulation of research from the social sciences suggests that adult relationships-provided not only by parents. but by grandparents, neighbors and other interested elders-are a common factor among resilient children, who achieve success despite growing up under disadvantaged and stressful circumstances. An important. and not often addressed, question for social programs and policy is whether the circumstances of more at-risk youth could be improved through efforts designed to provide greater access to helping relationships with interested adults

Elder Mentors: Elder Mentors and At-Risk Youth

Many at-risk youth are growing up isolated from the range of caring and consistent adult relationships so important for navigating the treacherous course from adolescence to adulthood. An accumulation of longitudinal research suggests that adult relationships-- provided not only by parents, but by grandparents, neighbors and other interested adults--are a common factor among resilient children, who achieve success despite growing up in disadvantaged and stressful circumstances. An important, and not often addressed, question for social intervention is whether the circumstances of more at-risk youth could be improved through efforts designed to provide greater access to these relationships

Elder Mentors: Giving Schools a Hand

Mentoring is threatening to become a buzzword without meaning. We hear about mentoring for principals, for teachers, for students, for employees in a wide range of businesses and industry. There is mentoring by principals, by teachers, by students, by corporate executives, by members of the community. There is mentoring designed to help adult mentees (an ungraceful word) be better administrators, teachers, practitioners, or employees; to help youth adjust to society after incarceration or institutionalization; to do better in school, take good care of their children, not get pregnant in the first place, stay out of jail; stop taking drugs-and on and on

Evaluation of Silicon Nitride for Brayton Turbine Wheel Application

Silicon nitride (Si3N4) is being evaluated as a risk-reduction alternative for a Jupiter Icy Moons Orbiter Brayton turbine wheel in the event that the Prometheus program design requirements exceed the creep strength of the baseline metallic superalloys. Five Si3N4 ceramics, each processed by a different method, were screened based on the Weibull distribution of bend strength at 1700 F (927 C). Three of the Si3N4 ceramics, Honeywell AS800, Kyocera SN282, and Saint-Gobain NT154, had bend strengths in excess of 87 ksi (600 MPa) at 1700 F (927 C). These were chosen for further assessment and consideration for future subcomponent and component fabrication and testing

A sintering model for SiC(sub)w/Si3N4 composites

Presented is a model which suggests that it should be possible to pressureless sinter a SiC(sub w)/ Si3N4 composite to theoretical density. Prior failure to achieve complete densification by sintering is attributed to the use of compositions which result in a glass deficit. There is one basic premise for this model. The ratio of glass amount to surface area of nonglass constituents must be the same for both composite and sinterable monolithic Si3N4. This model suggests that whisker and grain sizes and whisker loading influence the glass amount necessary for successful sintering of composites. According to the model, a large glass amount will be necessary for successful sintering of these composites. However, grain boundary thicknesses in the composite will be less than those in the analogous monolithic materials. This suggests that good high temperature strength may still be attained. A recent report supports the predictions of the model

Slurry-pressing consolidation of silicon nitride

A baseline slurry-pressing method for a silicon nitride material is developed. The Si3N4 composition contained 5.8 wt percent SiO2 and 6.4 wt percent Y2O3. Slurry-pressing variables included volume percent solids, application of ultrasonic energy, and pH. Twenty vol percent slurry-pressed material was approximately 11 percent stronger than both 30 vol percent slurry-pressed and dry-pressed materials. The Student's t-test showed the difference to be significant at the 99 percent confidence level. Twenty volume percent (300 h) slurry-pressed test bars exhibited strengths as high as 980 MPa. Large, columnar beta-Si3N4 grains caused failure in the highest strength specimens. The improved strength correlated with better structural uniformity as determined by radiography, optical microscopy, and image analysis