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Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
Impervious Surfaces And Water Quality: A Review Of Current Literature And Its Implications For Watershed Planning, Elizabeth Brabec
Impervious Surfaces And Water Quality: A Review Of Current Literature And Its Implications For Watershed Planning, Elizabeth Brabec
Elizabeth Brabec
Impervious surfaces have for many years been recognized as an indicator of the intensity of the urban environment and, with the advent of urban sprawl, they have become a key issue in habitat health. Although a considerable amount of research has been done to define impervious thresholds for water quality degradation, there are a number of flaws in the assumptions and methodologies used. Given refinement of the methodology, accurate and usable parameters for preventative watershed planning can be developed, which include impervious surface thresholds and a balance between pervious and impervious surfaces within a watershed.
Agricultural Land Fragmentation: The Spatial Effects Of Three Land Protection Strategies In The Eastern United States, Elizabeth Brabec, Chip Smith
Agricultural Land Fragmentation: The Spatial Effects Of Three Land Protection Strategies In The Eastern United States, Elizabeth Brabec, Chip Smith
Elizabeth Brabec
Fragmentation of agricultural land by urban sprawl affects both the agricultural production capacity of the land and its rural scenic quality. In order to assess the resulting fragmentation of the three most common types of agricultural land conservation tools in the United States, this study analyzes the spatial form of three land protection strategies: a purchase of development rights (PDR) program, a clustering program and a transfer of development rights program. By assessing a series of measures of success such as total acreage protected, size of parcels, contiguity and farming status, the study compares the effectiveness of programs that have …
Reactivity Profiles Of Ligands Of Mammalian Retinoic Acid Receptors: A Preliminary Corepa Analysis, Steven P. Bradbury, G. T. Ankley, O. G. Mekenyan, V. . Kamenska, P. K. Schmieder
Reactivity Profiles Of Ligands Of Mammalian Retinoic Acid Receptors: A Preliminary Corepa Analysis, Steven P. Bradbury, G. T. Ankley, O. G. Mekenyan, V. . Kamenska, P. K. Schmieder
Steven P. Bradbury
Retinoic acid and associated derivatives comprise a class of endogenous hormones that bind to and activate different families of retinoic acid receptors (RARs, RXRs), and control many aspects of vertebrate development. Identification of potential RAR and RXR ligands is of interest both from a pharmaceutical and toxicological perspective. The recently developed COREPA (COmmon REactivity PAttern) algorithm was used to establish reactivity profiles for a limited data set of retinoid receptor ligands in terms of activation of three RARs (a, b, g) and an RXR (a). Conformational analysis of a training set of retinoids and related analogues in terms of thermodynamic …
Narrowing Historical Uncertainty: Probabilistic Classification Of Ambiguously Identified Tree Species In Historical Forest Survey Data, David J. Mladenoff, Sally E. Dahir, Eric V. Nordheim, Lisa A. Schulte, Glenn G. Guntenspergen
Narrowing Historical Uncertainty: Probabilistic Classification Of Ambiguously Identified Tree Species In Historical Forest Survey Data, David J. Mladenoff, Sally E. Dahir, Eric V. Nordheim, Lisa A. Schulte, Glenn G. Guntenspergen
Lisa A. Schulte Moore
Historical data have increasingly become appreciated for insight into the past conditions of ecosystems. Uses of such data include assessing the extent of ecosystem change; deriving ecological baselines for management, restoration, and modeling; and assessing the importance of past conditions on the composition and function of current systems. One historical data set of this type is the Public Land Survey (PLS) of the United States General Land Office, which contains data on multiple tree species, sizes, and distances recorded at each survey point, located at half-mile (0.8-km) intervals on a 1-mi (1.6 km) grid. This survey method was begun in …
Meridian Hill Park: The Making Of An American Neoclassical Landscape, Elizabeth Brabec
Meridian Hill Park: The Making Of An American Neoclassical Landscape, Elizabeth Brabec
Elizabeth Brabec
The neoclassical design was the dominant design movement in landscape architecture at the turn of the last century, dictating the form and design of public parks for most of the first half of the twentieth century. Meridian Hill Park, located just north of the White ouse in Washington, DC, is considered the most ambitious neoclassical park ever conceived in the United States. The paper provides an overview of the design development of the park, illustrating how classical design precedents were used to create a contemporary neo-classical park.