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Articles 1 - 14 of 14

Full-Text Articles in Social and Behavioral Sciences

Gis And Spatial Analysis In Urban And Regional Research, Derek Bond Nov 2000

Gis And Spatial Analysis In Urban And Regional Research, Derek Bond

Derek Bond

The early optimism surrounding GIS has now faded. Few GIS implementations have lived up to expectation. The most successful have been those at the operational level where their main role has been to replace paper maps with digital ones. However, as the cost of GIS implementation falls and spatial data becomes more readily available there is a need to consider the future of GIS and spatial analysis. This is particularly important in the field of urban and regional research especially where considerable investment in GIS has already been made. This paper looks at the major issues that face regional and …


Can We Protect Agricultural Land And The Scenic Rural Landscape? The Spatial Effects Of Three Land Protection Strategies In The Eastern United States, Elizabeth Brabec, Chip Smith Jun 2000

Can We Protect Agricultural Land And The Scenic Rural Landscape? The Spatial Effects Of Three Land Protection Strategies In The Eastern United States, Elizabeth Brabec, Chip Smith

Elizabeth Brabec

In order to assess the efficacy of the three most common types of agricultural land conservation in the United States, this study analyzes the spatial and visual quality of a purchase of development rights program and two regulatory programs — cluster and the transfer of development rights. The study compares the effectiveness of programs that have been in place for periods of 6 to 18 years, surveying three different communities in the urban fringe: 1. the transfer of development rights program in Montgomery County, Maryland, in effect since 1981, 2. Riverhead, New York’s farmland development rights acquisition program, administered by …


Fragmentation, Impervious Surfaces And Water Quality: Quantifying The Effects Of Density And Spatial Arrangement, Elizabeth Brabec, Paul Richards, Stacey Schulte Jun 2000

Fragmentation, Impervious Surfaces And Water Quality: Quantifying The Effects Of Density And Spatial Arrangement, Elizabeth Brabec, Paul Richards, Stacey Schulte

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. In addition to the direct impacts to water quality, impervious surfaces fragment open space and habitat and are therefore a primary land use indicator of both water quality and ecological degradation. This paper develops an understanding of the land use planning implications of the interaction of impervious surfaces, water quality and the spatial form those surfaces take in a watershed. In order to clarify these relationships, …


Effect Of Carbopol And Polyvinylpyrrolidone On The Mechanical, Rheological, And Release Properties Of Bioadhesive Polyethylene Glycol Gels, Philadelphia University May 2000

Effect Of Carbopol And Polyvinylpyrrolidone On The Mechanical, Rheological, And Release Properties Of Bioadhesive Polyethylene Glycol Gels, Philadelphia University

Philadelphia University, Jordan

No abstract provided.


Perl For Librarians (Workshop On The Practical Extraction And Reporting Language), Patrick Yott, Christopher Hoebeke Feb 2000

Perl For Librarians (Workshop On The Practical Extraction And Reporting Language), Patrick Yott, Christopher Hoebeke

Christopher H Hoebeke

No abstract provided.


Reflexive Autopoietic Dissipative Special Systems Theory, Kent D. Palmer Jan 2000

Reflexive Autopoietic Dissipative Special Systems Theory, Kent D. Palmer

Kent D. Palmer

A newly discovered approach to extending General Systems Theory as defined by George Klir through a set of Special Systems is described. General Systems Theory is distinguished from the theory of Meta-systems. Then, a hinge of three special systems is identified between systems and meta-systems. These special systems are defined by algebraic analogies. Anomalous physical phenomena are specified that exemplify the structures defined by the algebraic analogies. The extraordinary efficacious properties of these special systems are explained. These include ultra-efficiency and ultra-effectiveness. These three special systems are called dissipative, autopoietic, and reflexive. They are anomalous within general systems theory and …


Unified Matrix Processor Design For Fct-Iv And Fst-Iv Hartley Based Transforms, Philadelphia University Jan 2000

Unified Matrix Processor Design For Fct-Iv And Fst-Iv Hartley Based Transforms, Philadelphia University

Philadelphia University, Jordan

No abstract provided.


Clusterin Is An Atp-Independent Chaperone With Very Broad Substrate Specificity That Stabilizes Stressed Proteins In A Folding-Competent State, Stephen Poon, Simon Easterbrook-Smith, Mark Rybchyn, John Carver, Mark Wilson Dec 1999

Clusterin Is An Atp-Independent Chaperone With Very Broad Substrate Specificity That Stabilizes Stressed Proteins In A Folding-Competent State, Stephen Poon, Simon Easterbrook-Smith, Mark Rybchyn, John Carver, Mark Wilson

Mark R Wilson

We recently reported that the ubiquitous, secreted protein clusterin has chaperone activity in vitro [Humphreys et al. (1999) J. Biol. Chem. 274, 6875−6881]. In this study, we demonstrate that clusterin (i) inhibits stress-induced precipitation of a very broad range of structurally divergent protein substrates, (ii) binds irreversibly via an ATP-independent mechanism to stressed proteins to form solubilized high molecular weight complexes, (iii) lacks detectable ATPase activity, (iv) when acting alone, does not effect refolding of stressed proteins in vitro, and (v) stabilizes stressed proteins in a state competent for refolding by heat shock protein 70 (HSP70). Furthermore, we show that, …


Logic-Based Methods For Optimization: Combining Optimization And Constraint Satisfaction, John Hooker Dec 1999

Logic-Based Methods For Optimization: Combining Optimization And Constraint Satisfaction, John Hooker

John Hooker

No abstract provided.


Collaborative Activity Between Parietal And Dorso-Lateral Prefrontal Cortex In Dynamic Spatial Working Memory Revealed By Fmri, Vaibhav A. Diwadkar, Patricia A. Carpenter, Marcel Adam Just Dec 1999

Collaborative Activity Between Parietal And Dorso-Lateral Prefrontal Cortex In Dynamic Spatial Working Memory Revealed By Fmri, Vaibhav A. Diwadkar, Patricia A. Carpenter, Marcel Adam Just

Marcel Adam Just

No abstract provided.


The Neural Basis Of Strategy And Skill In Sentence-Picture Verification, Erik D. Reichle, Patricia A. A. Carpenter, Marcel Adam Just Dec 1999

The Neural Basis Of Strategy And Skill In Sentence-Picture Verification, Erik D. Reichle, Patricia A. A. Carpenter, Marcel Adam Just

Marcel Adam Just

No abstract provided.


Working Memory And Executive Function: Evidence From Neuroimaging, Patricia A. Carpenter, Marcel Adam Just, Erik D. Reichle Dec 1999

Working Memory And Executive Function: Evidence From Neuroimaging, Patricia A. Carpenter, Marcel Adam Just, Erik D. Reichle

Marcel Adam Just

No abstract provided.


Reflexive Autopoietic Systems Theory, Kent D. Palmer Dec 1999

Reflexive Autopoietic Systems Theory, Kent D. Palmer

Kent D. Palmer

Exploring the Meta-systems of Emergent Worlds


Adaptive Testing In Arch Models, Douglas G. Steigerwald, Oliver Linton Dec 1999

Adaptive Testing In Arch Models, Douglas G. Steigerwald, Oliver Linton

Douglas G. Steigerwald

Specification tests for conditional heteroskedasticity that are derived under the assumption that the density of the innovation is Gaussian may not be powerful in light of the recent empirical results that the density is not Gaussian. We obtain specification tests for conditional heteroskedasticity under the assumption that the innovation density is a member of a general family of densities. Our test statistics maximize asymptotic local power and weighted average power criteria for the general family of densities. We establish both first-order and second-order theory for our procedures. Simulations indicate that asymptotic power gains are achievable in finite samples.