A comparative study was initiated to determine if habitat influences the abundance and richness of nitidulid beetle fauna at three sites (Kent Bog, Tinkers Creek, and Gott Fen) managed by the Division of Natural Areas and Preserves of the Ohio Department of Natural Resources. These sites in Portage County were sampled from early May through late October of 1990. Six sampling techniques were use...

A comparative study was initiated to determine if habitat influences the abundance and richness of nitidulid beetle fauna at three sites (Kent Bog, Tinkers Creek, and Gott Fen) managed by the Division of Natural Areas and Preserves of the Ohio Department of Natural Resources. These sites in Portage County were sampled from early May through late October of 1990. Six sampling techniques were use...

The problem of text classification is to predict the labels of documents based on their content. When learning a classifier using training data, one must balance two aspects: (1) specificity to the training set, and (2) generalization to unseen data. A natural framework for this problem is compression. In compressing a set of document labels, we can either transmit the labels directly, or speci...

The roots of nearly all land plants form mycorrhizal symbioses with specialized soil fungi. The mycorrhizal fungi serve as extensions of plant roots, taking up nutrients and water and transferring them to the roots. In return, the mycorrhizal fungi receive their primary energy source in the form of simple sugars from plant photosynthates translocated to the roots. Sequoiadendron giganteum forms...

Since the 1970s an ‘ethics boom’ has occurred to counter the disappearance of ethics education from tertiary institutions. This ‘boom’ appears to be absent from teacher education programs in Australia and the United States. Given persistent calls to enhance teacher quality this is problematic because quality teaching is inexorably linked to teachers’ beliefs, values and professional ethics. Thi...

Quantitative differences in leaf abscisic acid (ABA) among Acer rubrum L. (red maple) ecotypes were investigated. This study tested the hypothesis that seedlings from wet and dry maternal sites display distinctly different capacities to synthesize ABA in response to atmospheric vapor pressure defi cits. The increased levels of ABA in leaf tissue in the red maple ecotypes were associated with at...

Robert E. Morris, M.D., is Professor of Pediatrics at the University of California, Los Angeles and Louisiana State University's Health Sciences Center, and Director of Pediatrics at Orthopaedic Hospital in Los Angeles. He previously served as lead physician at Central Juvenile Hall, and he coordinated the UCLA adolescent teaching program in the Los Angeles juvenile detention system. Dr. Morris...

St. John’s is a “landscape paradise” in central Minnesota. Although no complete checklist of vegetation exists for the campus, various surveys reveal a diverse flora. This floral wealth is the result of several terrestrial biomes (Figure 1) converging on campus – prairie, savanna, deciduous forest, and coniferous forest – as well as diverse aquatic habitats including both lakes and wetlands. A ...

The Virginia landscape supports a remarkable diversity of forests, from maritime dune woodlands, swamp forests, and pine savannas of the Atlantic Coastal Plain, to post-agricultural pine-hardwood forests of the Piedmont, to mixed oak, mesophytic, northern hardwood, and high elevation spruce-fir forests across three mountain provinces in western parts of the state. Virginia’s forests also have b...

Detailed sedimentological study of Devonian black shales from the eastern USA shows that these rocks contain valuable textural clues to their depositional history, clues that hitherto have gone mostly unrecognized. Cryptic bioturbation and subtle erosional features suggest the presence, originally, of much more benthic life and bottom current activity than is commonly assumed for these deposits...