Use of Geographic Information Systems by American Evaluation Association Members in their Professional Practice

Background: As geographic information systems (GIS) technology continues to develop and expand in its capacity and applications, it is becoming increasingly useful to many disciplines. Even so, little has been written about the place of GIS technology in evaluation practice, and there is a paucity of information as to the extent to and applications for which evaluation practitioners use such technology. Purpose: In this investigation, the prevalence and common applications of GIS technology in professional evaluation practice are examined. Particularly, the study was designed to estimate what proportion of American Evaluation Association (AEA) members who self-identify as evaluation practitioners use GIS in their practice, if at all, and, if so, to what extent. For those who use GIS in their evaluation practice, the specific GIS software packages and applications used also are explored. Setting: Not applicable. Intervention: Not applicable. Research Design: A simple random sample of American Evaluation Association (AEA) members were surveyed, with an emphasis on evaluation practitioners. Findings: Less than less than half (41.04% ±6.09%) of AEA members who consider themselves evaluation practitioners have ever used GIS in their evaluation practice and less than one-third (31.47% ±5.75%) have received some form of training in GIS methods. Data visualization is, by far, the most frequent application of GIS in evaluation practice. Keywords: American Evaluation Association; geographic information systems; technology in evaluation; evaluation practice; research on evaluatio

Retarded coordinates based at a world line, and the motion of a small black hole in an external universe

In the first part of this article I present a system of retarded coordinates based at an arbitrary world line of an arbitrary curved spacetime. The retarded-time coordinate labels forward light cones that are centered on the world line, the radial coordinate is an affine parameter on the null generators of these light cones, and the angular coordinates are constant on each of these generators. The spacetime metric in the retarded coordinates is displayed as an expansion in powers of the radial coordinate and expressed in terms of the world line's acceleration vector and the spacetime's Riemann tensor evaluated at the world line. The formalism is illustrated in two examples, the first involving a comoving world line of a spatially-flat cosmology, the other featuring an observer in circular motion in the Schwarzschild spacetime. The main application of the formalism is presented in the second part of the article, in which I consider the motion of a small black hole in an empty external universe. I use the retarded coordinates to construct the metric of the small black hole perturbed by the tidal field of the external universe, and the metric of the external universe perturbed by the presence of the black hole. Matching these metrics produces the MiSaTaQuWa equations of motion for the small black hole.Comment: 20 pages, revtex4, 2 figure

Fall 1969

Massachusetts Lawn and Turf Grass CouncilBetter Turf Through Research and Education Artificial Turf Faces Credibility Gab by Dr. Gene C. Nutter (page 1) Nitrogen Facts and Fallacies by W.H. Garman (2) DDT Opponents by Charles Wurster, Jr. (10) DDT Defenders by Charles Wurster, Jr. (11) What Type 2,4-D to Use? by J.S. Coartney and A.H. Kates (21) Irrigation Circuit Break Pinpointed in One Hour (24

Accepting higher morbidity in exchange for sacrificing fewer animals in studies developing novel infection-control strategies.

Preventing bacterial infections from becoming the leading cause of death by the year 2050 requires the development of novel, infection-control strategies, building heavily on biomaterials science, including nanotechnology. Pre-clinical (animal) studies are indispensable for this development. Often, animal infection outcomes bear little relation to human clinical outcome. Here, we review conclusions from pathogen-inoculum dose-finding pilot studies for evaluation of novel infection-control strategies in murine models. Pathogen-inoculum doses are generally preferred that produce the largest differences in quantitative infection outcome parameters between a control and an experimental group, without death or termination of animals due to having reached an inhumane end-point during the study. However, animal death may represent a better end-point for evaluation than large differences in outcome parameters or number of days over which infection persists. The clinical relevance of lower pre-clinical outcomes, such as bioluminescence, colony forming units (CFUs) retrieved or more rapid clearance of infection is unknown, as most animals cure infection without intervention, depending on pathogen-species and pathogen-inoculum dose administered. In human clinical practice, patients suffering from infection present to hospital emergency wards, frequently in life-threatening conditions. Animal infection-models should therefore use prevention of death and recurrence of infection as primary efficacy targets to be addressed by novel strategies. To compensate for increased animal morbidity and mortality, animal experiments should solely be conducted for pre-clinical proof of principle and safety. With the advent of sophisticated in vitro models, we advocate limiting use of animal models when exploring pathogenesis or infection mechanisms

Supporting Maine’s Families: Recommendations from Maine\u27s Relatives as Parents Project

Maine is experiencing an increasing rate of children being raised by their grandparents or other relatives. The common reasons these individuals have taken on the responsibility of surrogate parenting, when the biological parents are unwilling or unable to do so include drug and alcohol abuse, child abuse and neglect, mental health problems, illness and death, incarceration and family violence. Under the vast majority of circumstances, relatives take responsibility for these children instead of the State Child Protective Services; this saves the State money but can be very burdensome to the family. Though relatives welcome the children, they often face unexpected lifestyle changes. The challenges they face can be physically, emotionally, and financially overwhelming, compromising their capacity to provide unconditional love, build trust, and serve as strong adult role models. It is in the interest of Maine’s children and families to support relatives in assuming this responsibility. These caregivers - often called kinship caregivers - take on this responsibility because they want to keep their families together; they love their grandchildren and want to keep them healthy and safe. The availability of responsive policies and programs have the capacity to alleviate stress and improve health and also help reduce the sense of isolation often felt by older adults raising children. During 2002-2003, the University of Maine Center on Aging, with a grant from Generations United, sponsored the Relatives as Parents Project Task Force to develop recommendations on how Maine can better support families in relative-headed households. Three subcommittees grew out of Maine’s RAPP Task Force and the recommendations presented here reflect the work of those three groups. The foci of these subcommittees were: financial security, community resources, and mental health and substance abuse issues

Knowing Better and Losing Even More: The Use of Knowledge in Hazards Management

Although loss of life from natural hazards has been declining, the property losses from those causes have been increasing. At the same time the volume of research on natural hazards and the books reviewing findings on the subject have also increased. Several major changes have occurred in the topics addressed. Emphasis has shifted from hazards to disasters. There has been increasing attention to vulnerability. Views of causation have changed. Four possible explanations are examined for the situation in which more is lost while more is known: (1) knowledge continues to be flawed by areas of ignorance; (2) knowledge is available but not used effectively; (3) knowledge is used effectively but takes a long time to have effect; and (4) knowledge is used effectively in some respects but is overwhelmed by increases in vulnerability and in population, wealth, and poverty