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Articles 691 - 720 of 2437
Full-Text Articles in Physical Sciences and Mathematics
Improving The Validation Of Model-Simulated Crop Yield Response To Climate Change: An Application To The Epic Model* Jour. Ser. No. 11339 Nebraska Ag. Res. Div., William E. Easterling, Xiafen Chen, Cynthia Hays, James R, Brandle, Hehui Zang
Improving The Validation Of Model-Simulated Crop Yield Response To Climate Change: An Application To The Epic Model* Jour. Ser. No. 11339 Nebraska Ag. Res. Div., William E. Easterling, Xiafen Chen, Cynthia Hays, James R, Brandle, Hehui Zang
School of Natural Resources: Faculty Publications
Crop models have been used extensively to simulate yield response to various scenarios of climate change. Such simulations have been inadequately validated, limiting their utility in policy analysis. In this research, it is argued that the performance of crop models during recent years of extreme weather conditions relative to current normals may give a better indication of the validity of model simulations of crop yields in response to climate change than performance during the full range of climate conditions (as is done now). Twenty years of the climate record (1971-1990) are separated into different growing season temperature and precipitation classes …
Beach Response To Subsidence Following A Cascadia Subduction Zone Earthquake Along The Washington-Oregon Coast, Debra Lee Doyle
Beach Response To Subsidence Following A Cascadia Subduction Zone Earthquake Along The Washington-Oregon Coast, Debra Lee Doyle
Dissertations and Theses
Beach shoreline retreat induced by coseismic subsidence in the Cascadia subduction zone is an important post-earthquake hazard. Sand on a beach acts as a buffer to wave attack, protecting dunes, bluffs and terraces. The loss of sand from a beach could promote critical erosion of the shoreline. This study was initiated in order to estimate the potential amount of post subsidence shoreline retreat on a regional scale in the Central Cascadia Margin. The study area is a 331 km stretch of coastline from Copalis, Washington to Florence, Oregon. Several erosion models were evaluated, and the Bruun model was selected as …
Reform Of The Endangered Species Act: Overview Of Administrative Reforms [Congressional Hearing Material Submitted By Bruce E. Babbitt, Secretary, Department Of Interior], Dinah Bear
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
31 pages.
Essential Elements Of Amendments To The Endangered Species Act, John Harja
Essential Elements Of Amendments To The Endangered Species Act, John Harja
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
14 pages.
Endangered Species Act Reform Proposals: An Environmentalist’S Perspective, Wm. Robert Irvin
Endangered Species Act Reform Proposals: An Environmentalist’S Perspective, Wm. Robert Irvin
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
11 pages.
The Endangered Species: The Urban Water Utility Perspective, Chips Barry
The Endangered Species: The Urban Water Utility Perspective, Chips Barry
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
24 pages.
A Tribal Perspective On Esa Reform, Ted Strong
A Tribal Perspective On Esa Reform, Ted Strong
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
4 pages.
Biodiversity Protection And Ecosystem Management: Aspirational Goals Or Law-To-Apply?, Oliver A. Houck
Biodiversity Protection And Ecosystem Management: Aspirational Goals Or Law-To-Apply?, Oliver A. Houck
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
7 pages.
Contains references.
How The Regulated Community Views Regulation To Protect Living Resources: The Endangered Species Act, Biological Diversity, And Ecosystem Management, Steven P. Quarles
How The Regulated Community Views Regulation To Protect Living Resources: The Endangered Species Act, Biological Diversity, And Ecosystem Management, Steven P. Quarles
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
21 pages.
Contains footnotes.
Needed Narrowing As The Computational Strategy Of Evaluable Functions In An Extension Of Goedel, Bobbi J. Barry
Needed Narrowing As The Computational Strategy Of Evaluable Functions In An Extension Of Goedel, Bobbi J. Barry
Dissertations and Theses
A programming language that combines the best aspects of both the functional and logic paradigms with a complete evaluation strategy has been a goal of a Portland State University project team for the last several years. I present the third in a series of modifications to the compiler of the logic programming language Goedel which reaches this goal. This enhancement of Goedel's compiler translates user-defined functions in the form of rewrite rules into code that performs evaluation of these functions by the strategy of needed narrowing. In addition, Goedel's mechanism that evaluates predicates is supplemented so that needed narrowing is …
Upper Colorado River Fish: A Recovery Program That Is Working – Myth Or Reality?, James S. Lochhead
Upper Colorado River Fish: A Recovery Program That Is Working – Myth Or Reality?, James S. Lochhead
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
24 pages (includes 1 map).
Contains 2 pages of references.
A Comparison: Lessons From The Columbia Basin And The Upper Colorado Basin Fish Recovery Efforts, Mary Christina Wood
A Comparison: Lessons From The Columbia Basin And The Upper Colorado Basin Fish Recovery Efforts, Mary Christina Wood
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
47 pages.
Contains 5 pages of references.
The Esa, Water Rights, And Regulatory Takings, Barton H. Thompson, Jr.
The Esa, Water Rights, And Regulatory Takings, Barton H. Thompson, Jr.
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
28 pages.
Contains 2 pages of references.
The Endangered Species Act—Economic Impacts: The Perception And The Numbers, Jon A. Souder
The Endangered Species Act—Economic Impacts: The Perception And The Numbers, Jon A. Souder
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
13 pages (includes illustrations).
Contains 2 pages of references.
Water Rights, Contract Rights, And The Endangered Species Act, Brian E. Gray
Water Rights, Contract Rights, And The Endangered Species Act, Brian E. Gray
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
12 pages.
Contains references.
The Endangered Species Act: Tramping On Tribal Rights?, Robert S. Pelcyger
The Endangered Species Act: Tramping On Tribal Rights?, Robert S. Pelcyger
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
32 pages.
Contains footnotes.
Habitat Based, Multi-Species Hcps: Lessons From The Northwest, James A. Kraft
Habitat Based, Multi-Species Hcps: Lessons From The Northwest, James A. Kraft
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
9 pages.
The Enigma Of The Blind Salamander And Groundwater Pumping: Lessons From The Edwards Aquifer, Texas, Charles R. Shockey
The Enigma Of The Blind Salamander And Groundwater Pumping: Lessons From The Edwards Aquifer, Texas, Charles R. Shockey
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
39 pages (includes illustrations and maps).
Contains footnotes.
Columbia River Salmon: Are Any Of The Esa Tools Adequate For The Job?, John M. Volkman
Columbia River Salmon: Are Any Of The Esa Tools Adequate For The Job?, John M. Volkman
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
32 pages.
Contains footnotes.
An Overview Of The Endangered Species Act, Michael J. Brennan
An Overview Of The Endangered Species Act, Michael J. Brennan
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
25 pages.
Landscape Scale Habitat Conservation Plans: The California Experience, Lindell L. Marsh
Landscape Scale Habitat Conservation Plans: The California Experience, Lindell L. Marsh
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
24 pages.
Contains 3 pages of references.
Lessons From Reintroduction: The Bear And The Wolf, Michael Roy
Lessons From Reintroduction: The Bear And The Wolf, Michael Roy
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
15 pages.
Contains 1 page of references.
Waiting To Exhale Under The Esa: The Evolution Of Hcps And Section 4(D) Rules, Donald J. Barry
Waiting To Exhale Under The Esa: The Evolution Of Hcps And Section 4(D) Rules, Donald J. Barry
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
16 pages.
The Sonoran Desert Tortoise And The Mexican Spotted Owl: The High Road And The Slow Road To Conservation, Duane L. Shroufe
The Sonoran Desert Tortoise And The Mexican Spotted Owl: The High Road And The Slow Road To Conservation, Duane L. Shroufe
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
13 pages.
The Ethical Aspects Of Biodiversity Protection: Duties To Human Beings And Duties To Other Species, Dale Jamieson
The Ethical Aspects Of Biodiversity Protection: Duties To Human Beings And Duties To Other Species, Dale Jamieson
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
11 pages.
Contains 2 pages of references.
The Endangered Species Act: Crystallizing Ecosystem Management, George T. Frampton Jr.
The Endangered Species Act: Crystallizing Ecosystem Management, George T. Frampton Jr.
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
15 pages.
The Spectral Function Of Random Resistor Networks, Anthony Day, M. Thorpe
The Spectral Function Of Random Resistor Networks, Anthony Day, M. Thorpe
Anthony Roy Day
The effective complex conductivity [...] of a two-component material can be conveniently expressed as an integral transformation of a spectral function. The spectral function depends only on the geometry of the material, and can be used to calculate [...] for any particular choice of component conductivities. This is a very useful feature if the component conductivities can be varied (by changing the temperature or frequency, for example) at a fixed geometry. We present a derivation of the spectral function that identifies it as a density of states. We have made direct numerical calculations of the spectral function of two-dimensional random …
Agenda: Biodiversity Protection: Implementation And Reform Of The Endangered Species Act, University Of Colorado Boulder. Natural Resources Law Center
Agenda: Biodiversity Protection: Implementation And Reform Of The Endangered Species Act, University Of Colorado Boulder. Natural Resources Law Center
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
Conference organizers and/or faculty included University of Colorado School of Law professors Betsy Rieke, David H. Getches, Michael A. Gheleta and Charles F. Wilkinson.
All across the country--in Congress, in state legislatures and in urban and rural communities--people are discussing why we should or should not protect biodiversity and how best to do so. Since the Endangered Species Act is up for reauthorization, a variety of reform proposals are being debated. Speakers--including natural resource scholars, experts from the private and nonprofit sectors, and government officials--will examine the rationale for biodiversity protection, the legal framework of the Endangered Species Act, and …
The Scientific Underpinnings Of Biodiversity Protection, Jane Lubchenko
The Scientific Underpinnings Of Biodiversity Protection, Jane Lubchenko
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
5 pages.
Robust Optimization Using Training Set Evolution, Tony R. Martinez, Dan A. Ventura
Robust Optimization Using Training Set Evolution, Tony R. Martinez, Dan A. Ventura
Faculty Publications
Training Set Evolution is an eclectic optimization technique that combines evolutionary computation (EC) with neural networks (NN). The synthesis of EC with NN provides both initial unsupervised random exploration of the solution space as well as supervised generalization on those initial solutions. An assimilation of a large amount of data obtained over many simulations provides encouraging empirical evidence for the robustness of Evolutionary Training Sets as an optimization technique for feedback and control problems.