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2007

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Articles 6751 - 6758 of 6758

Full-Text Articles in Physical Sciences and Mathematics

A Classroom Teacher's Reflection On Learning Sustainability, Sandra Wooltorton Dec 2006

A Classroom Teacher's Reflection On Learning Sustainability, Sandra Wooltorton

Sandra Wooltorton

In 2004 I taught a class of 31 eleven and twelve year olds in a south-west Western Australian state primary school which I will call Forestdown. After critique and reflection on my 2004 teaching, in 2005 I taught half a day per week at the same school, this time with ten year olds. I used action research (Reason & Bradbury, 2001) to articulate my challenges and to formulate the approach I used to address them. The research context is a prosperous, business-as-usual culture built uupon a foundation of environmental destruction. Even though the children I taught in 2004 performed creditably …

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In The Heat Of The Law, It's Not Just Steam: Geothermal Resources And The Impact On Thermophile Biodiversity, Donald J. Kochan, Tiffany Grant Dec 2006

In The Heat Of The Law, It's Not Just Steam: Geothermal Resources And The Impact On Thermophile Biodiversity, Donald J. Kochan, Tiffany Grant

Donald J. Kochan

Significant research has been conducted into the utilization of geothermal resources as a ‘green’ energy source. However, minimal research has been conducted into geothermal resource utilization and depletion impacts on thermophile biodiversity. Thermophiles are organisms which have adapted over millions of year to extreme temperature and chemical compositions and exist in hot springs and other geothermal resources. Their ability to withstand high temperatures makes them invaluable to scientific and medical research. Current federal and California case law classify geothermal resources as a mineral, not a water resource. Acquisition of rights to develop a geothermal resource owned or reserved by the …

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The Translation Of Some Metaphorical Expressions In Shakespeare's Hamlet, Philadelphia University Dec 2006

The Translation Of Some Metaphorical Expressions In Shakespeare's Hamlet, Philadelphia University

Philadelphia University, Jordan

No abstract provided.

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Finding Molecular Complexes Through Multiple Layer Clustering Of Protein Interaction Networks, Bill Andreopoulos, Aijun An, Xiangji Huang, Xiaogang Wang Dec 2006

Finding Molecular Complexes Through Multiple Layer Clustering Of Protein Interaction Networks, Bill Andreopoulos, Aijun An, Xiangji Huang, Xiaogang Wang

William B. Andreopoulos

Clustering protein-protein interaction networks (PINs) helps to identify complexes that guide the cell machinery. Clustering algorithms often create a flat clustering, without considering the layered structure of PINs. We propose the MULIC clustering algorithm that produces layered clusters. We applied MULIC to five PINs. Clusters correlate with known MIPS protein complexes. For example, a cluster of 79 proteins overlaps with a known complex of 88 proteins. Proteins in top cluster layers tend to be more representative of complexes than proteins in bottom layers. Lab work on finding unknown complexes or determining drug effects can be guided by top layer proteins.

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Assessment Of Thinking In Adult Learners, Darlene Eleanor Crone-Todd Dec 2006

Assessment Of Thinking In Adult Learners, Darlene Eleanor Crone-Todd

Darlene Crone-Todd

Higher-order thinking is one of the defining characteristics of higher education, yet the rating of such behavior has been neither reliable nor valid. Recent research involving the use of categories has yielded relatively high inter-rater reliability, with nominal categories of behavior identified. The current study applies an ordinal-scale model of hierarchical complexity (MHC) to educational tasks. The initial results suggest that the MHC can be used to score questions with varying degrees of complexity and support, and that future research should concentrate on determining the reliability and validity of this scoring system for educational purposes.

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Digital Elevation Accuracy And Grid Cell Size: Effects On Computed Topographic Attributes, Rob H. Erskine, Timothy R. Green Dec 2006

Digital Elevation Accuracy And Grid Cell Size: Effects On Computed Topographic Attributes, Rob H. Erskine, Timothy R. Green

Timothy R. Green

Terrain attributes are commonly used to explain the spatial variability of agronomic, pedologic, and hydrologic variables. The terrain attributes studied here (elevation, slope, aspect, and curvature) are estimated readily from digital elevation models (DEMs), but questions remain about how the accuracy and sample spacing of the elevation data affect the estimated attributes. The main objective of this study was to quantify differences in each terrain attribute due to factors affecting DEM accuracy and grid cell size. Three data sources were compared: (i) real-time kinematic global positioning system (RTKGPS); (ii) satellite-differentially corrected global positioning system (DGPS); and (iii) U.S. Geological Survey …

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Factors Affecting One-Way Hashing Of Cd-R Media, Christopher Marberry, Philip Craiger Dec 2006

Factors Affecting One-Way Hashing Of Cd-R Media, Christopher Marberry, Philip Craiger

J. Philip Craiger, Ph.D.

While conducting a validation study of proficiency test media we found that applying the same hash algorithm against a single CD using different forensic applications resulted in different hash values. We formulated a series of experiments to determine the cause of the anomalous hash values. Our results suggest that certain write options cause forensic applications to report different hash values. We examine the possible consequences of these anomalies in legal proceedings and provide best practices for the use of hashing procedures.

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A Developmental Study Of The Structural Integrity Of White Matter In Autism, Timothy A. Keller, Rajesh K. Kana, Marcel Adam Just Dec 2006

A Developmental Study Of The Structural Integrity Of White Matter In Autism, Timothy A. Keller, Rajesh K. Kana, Marcel Adam Just

Marcel Adam Just

No abstract provided.

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