Resolvable Designs With Unequal Block Sizes

Resolvable block designs for v varieties in blocks of size k require v to be a multiple of k so that all blocks are of the same size. If a factorization of v is not possible then a resolvable design with blocks of unequal size is necessary. Patterson & Williams (1976) suggested the use of designs derived from α -designs and conjectured that such designs are likely to be very efficient in the class of resolvable designs with block sizes k and k – 1. This paper examines these derived designs and compares them with designs generated directly using an interchange algorithm. It concludes that the derived designs should be used when v is large, but that for small v they can be relatively inefficient.     

A long life with a particular signature: life course and aging for people with disabilities

What does it mean to live a long life and grow old with disabilities? Or to be an aging parent and still be a caregiver to a disabled adult child? These are questions discussed in this article, the aim of which is to show how a life course perspective adds insight to the lived experience of disability and ageing of adults with disabilities. It is argued that the time concept is fundamental to the understanding of the lives of disabled people. Results are presented which challenge established knowledge regarding disability policies, autonomy, body, biographical disruption and prerequisites of active aging.     

Activists against hunger: Membership characteristics of a national social movement organization

This article presents results of the first study of the contemporary antihunger movement. We compare the membership characteristics of one its largest organizations, Bread for the World (BFW), with data on the general population of the United States drawn from the 1985 General Social Survey. When compared with the general population, BFW members are, among other things, unusually well educated, religious, politically liberal and efficacious, and active in church-related and political organizations. The differences in religious and political belief and organizational involvement persist even when BFW members are compared with their equally well educated counterparts in the general population. Our findings thus elucidate certain ideological and organizational bases for membership in BFW. We discuss the implications of the findings for issues in the contemporary study of social movements and for BFW's prospects in the political arena.     

The art and science of anti-aging therapies

A meeting entitled "The Art and Science of Anti-Aging Therapies: Convergence of Theory and Practice" took place on 18 and 19 March 2005 at the University of Pennsylvania School of Medicine. The symposium was held for health care professionals, researchers, and consumers to provide them with information about current trends in anti-aging therapies. The program, which combined medical, surgical, and nonpharmacological approaches to healthy successful aging, gave attendees the opportunity to make sense of the issues at hand and to sort out safe treatments from perilous quick fixes.     

Using tribal/State Title IV-E agreements to help American Indian tribes access foster care and adoption funding

Funding under Title IV-E has historically not been available to American Indian communities, therefore, tribes have had to develop agreements with states to access these funds for child care services. This study analyzes Title IV-E intergovernmental provisions to help tribes and states strengthen Title IV-E agreements. A nationwide content analysis of existing Title IV-E documents, phone interviews, and focus groups revealed that Title IV-E tribal/state agreements vary widely, with most tribes not receiving full access to state services. These agreements focus on foster care maintenance payments and services. This article includes recommendations to help facilitate tribal access to Title IV-E funding for foster care and adoption services.     

Example of Block Designs for Plant and Tree Breeding Trials

Experimental designs which use extensive blocking and which are particularly useful in plant and tree breeding trials are discussed. They can be constructed either to accommodate field restrictions or take advantage of favourable plot layouts. Computer software is available to generate these design types for use in practice. Examples cover latinized row-column designs, t -latinized and partially-latinized designs and designs with unequal block sizes.     

Construction of more Flexible and Efficient P–rep Designs

Early generation variety trials are very important in plant and tree breeding programs. Typically many entries are tested, often with very few resources available. Unreplicated trials using control plots are popular and it is common to repeat the trials at a number of locations. An alternative is to use partially replicated (p–rep) designs, where a proportion of the test entries are replicated at each location. We extend a method for the generation of p–rep designs based on α–arrays to allow for a much broader class of designs to be constructed. Updating procedures for the average efficiency factor and its upper bound are developed for application to the computer generation of efficient p–rep designs.