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Full-Text Articles in Arts and Humanities
Evolution Of The National Disease Prevention And Health Promotion Strategy: Establishing A Role For The Schools, Donald Iverson, Lloyd Kolbe
Evolution Of The National Disease Prevention And Health Promotion Strategy: Establishing A Role For The Schools, Donald Iverson, Lloyd Kolbe
Don C. Iverson
The history and evolution, during the past decade, of the national disease prevention and health promotion strategy is recounted, culminating with a description of the national prevention objectives. Objectives that directly could be attained by: (1) school health education; (2) school health services; (3) efforts to ensure healthy school environments; and (4) school physical education programs are delineated, as are objectives that could be influenced in important ways by school health programs. The nation's schools could contribute significantly and measurably toward improving the health of all Americans, if school health professionals, individually as well as within their various organizations, could …
Population Thinking And Tree Thinking In Systematics, Robert O’Hara
Population Thinking And Tree Thinking In Systematics, Robert O’Hara
Robert J. O’Hara
Two new modes of thinking have spread through systematics in the twentieth century. Both have deep historical roots, but they have been widely accepted only during this century. Population thinking overtook the field in the early part of the century, culminating in the full development of population systematics in the 1930s and 1940s, and the subsequent growth of the entire field of population biology. Population thinking rejects the idea that each species has a natural type (as the earlier essentialist view had assumed), and instead sees every species as a varying population of interbreeding individuals. Tree thinking has spread through …
Trees Of History In Systematics And Philology, Robert O’Hara
Trees Of History In Systematics And Philology, Robert O’Hara
Robert J. O’Hara
«The Natural System» is the name given to the underlying arrangement present in the diversity of life. Unlike a classification, which is made up of classes and members, a system or arrangement is an integrated whole made up of connected parts. In the pre-evolutionary period a variety of forms were proposed for the Natural System, including maps, circles, stars, and abstract multidimensional objects. The trees sketched by Darwin in the 1830s should probably be considered the first genuine evolutionary diagrams of the Natural System—the first genuine evolutionary trees. Darwin refined his image of the Natural System in the well-known evolutionary …