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Articles 3391 - 3420 of 12790
Full-Text Articles in Entire DC Network
Atlantic Provinces Region, Bruce Mactavish
Atlantic Provinces Region, Bruce Mactavish
National Audubon Society Field Notes
No abstract provided.
Quebec Region, Pierre Bannon, Yves Aubry, Normand David
Quebec Region, Pierre Bannon, Yves Aubry, Normand David
National Audubon Society Field Notes
No abstract provided.
Changing Seasons The Nesting Season, June 1-July 31, 1998, Stephen J. Stedman
Changing Seasons The Nesting Season, June 1-July 31, 1998, Stephen J. Stedman
National Audubon Society Field Notes
No abstract provided.
New England Region, Wayne R. Petersen
New England Region, Wayne R. Petersen
National Audubon Society Field Notes
No abstract provided.
Prairie Provinces Region, Rudolf F. Koes, Peter Taylor
Prairie Provinces Region, Rudolf F. Koes, Peter Taylor
National Audubon Society Field Notes
No abstract provided.
Middle Western Prairie Region, Kenneth J. Brock
Middle Western Prairie Region, Kenneth J. Brock
National Audubon Society Field Notes
No abstract provided.
Northern Great Plains Region, Ron E. Martin
Northern Great Plains Region, Ron E. Martin
National Audubon Society Field Notes
No abstract provided.
The Magnificent Frigatebird In Western North America, Steven G. Mlodinow
The Magnificent Frigatebird In Western North America, Steven G. Mlodinow
National Audubon Society Field Notes
No abstract provided.
Western, Daryl D. Tessen
Appalachian Region, George A. Hall
Appalachian Region, George A. Hall
National Audubon Society Field Notes
No abstract provided.
Florida, Richard T. Paul, Ann F. Schnapf
Florida, Richard T. Paul, Ann F. Schnapf
National Audubon Society Field Notes
No abstract provided.
Ontario Region, Ron Ridout
Texas Region, Greg W. Lasley, Chuck Sexton, Mark Lockwood, Cliff Shackelford
Texas Region, Greg W. Lasley, Chuck Sexton, Mark Lockwood, Cliff Shackelford
National Audubon Society Field Notes
No abstract provided.
Central Southern Region, Robert D. Purrington
Central Southern Region, Robert D. Purrington
National Audubon Society Field Notes
No abstract provided.
New Mexico Region, Sartor O. Williams Iii
New Mexico Region, Sartor O. Williams Iii
National Audubon Society Field Notes
No abstract provided.
Idaho-Western Montana Region, David Trochell
Idaho-Western Montana Region, David Trochell
National Audubon Society Field Notes
No abstract provided.
British Columbia-Yukon Region, Michael G. Shepard
British Columbia-Yukon Region, Michael G. Shepard
National Audubon Society Field Notes
No abstract provided.
Arizona Region, Chris D. Benesh, Gary H. Rosenberg
Arizona Region, Chris D. Benesh, Gary H. Rosenberg
National Audubon Society Field Notes
No abstract provided.
West Indies Region, Robert L. Norton
West Indies Region, Robert L. Norton
National Audubon Society Field Notes
No abstract provided.
Oregon-Washington Region, Bill Tweit, Bill Tice
Oregon-Washington Region, Bill Tweit, Bill Tice
National Audubon Society Field Notes
No abstract provided.
1998 Index Field Notes, Volume 52, National Audubon Society Field Notes
1998 Index Field Notes, Volume 52, National Audubon Society Field Notes
National Audubon Society Field Notes
No abstract provided.
Pictorial Highlights The Nesting Season June 1-July 31, 1998, National Audubon Society Field Notes
Pictorial Highlights The Nesting Season June 1-July 31, 1998, National Audubon Society Field Notes
National Audubon Society Field Notes
No abstract provided.
Southern Pacific Coast Region, Guy Mccaskie
Southern Pacific Coast Region, Guy Mccaskie
National Audubon Society Field Notes
No abstract provided.
Broad-Billed Sandpiper Jamaica Bay, New York, L. William Benner
Broad-Billed Sandpiper Jamaica Bay, New York, L. William Benner
National Audubon Society Field Notes
No abstract provided.
Back Matter (Pdf), National Audubon Society Field Notes
Back Matter (Pdf), National Audubon Society Field Notes
National Audubon Society Field Notes
No abstract provided.
A Braille Translation Solution Using Autocad And Lisp, Brian E. Bennett
A Braille Translation Solution Using Autocad And Lisp, Brian E. Bennett
Graduate Research Papers
The Americans with Disabilities Act of 1994 brought new requirements for architects, designers, and drafters to apply Braille symbol sets at various locations of public and private buildings. With production of many drawings using computer-aided drafting, the opportunity exists to automate this process, solve the problem of text to Braille conversion, and satisfy the requirements of federal regulation. This paper presents a LISP programing code structure for use within the AutoCAD drafting and design '\ software to solve the Braille symbol set translation problem with both 2D and 3D representations. An explanation of the logic and a detailed listing of …
Time History Extrapolation For Fdtd Modeling Of Shielding Enclosure Designs And Emi Antenna Geometries, Xiao Luo, Min Li, James L. Drewniak
Time History Extrapolation For Fdtd Modeling Of Shielding Enclosure Designs And Emi Antenna Geometries, Xiao Luo, Min Li, James L. Drewniak
Electrical and Computer Engineering Faculty Research & Creative Works
The GPOF (generalized pencil-of-function) method was used to extrapolate the time response from FDTD simulations of EMI problems by approximating the time history as a sum of complex exponentials. This method can significantly shorten the FDTD program execution time. However, various difficulties can arise from parameterization during data-processing. The GPOF is applied to, and studied for, two relevant EMI problems, enclosure design and EMI antenna modeling. The merits of GPOF in modeling shielding enclosures and EMI antennas is evaluated through several examples
A Feasibility Study Of On-Line Excitation System Parameter Estimation, Eric Ludwig, K. Shah, Kelvin T. Erickson, Mariesa Crow
A Feasibility Study Of On-Line Excitation System Parameter Estimation, Eric Ludwig, K. Shah, Kelvin T. Erickson, Mariesa Crow
Electrical and Computer Engineering Faculty Research & Creative Works
This paper details a feasibility study of estimating excitation system parameters during online operation using time-domain system identification. This study concentrates on identifying the appropriate exciter model, developing an input signal that would provide a proper level of perturbation such that the dynamics of the system can be captured, analyzing the effects of both systematic and random noise, developing algorithms to perform the parameter estimation, testing and validating the obtained system parameters. This study established a strong basis for estimating the system parameters during online operation.
Design Of Airflow Aperture Arrays In Shielding Enclosures, Min Li, S. Radu, J. Neubel, James L. Drewniak, Todd H. Hubing, Thomas Van Doren
Design Of Airflow Aperture Arrays In Shielding Enclosures, Min Li, S. Radu, J. Neubel, James L. Drewniak, Todd H. Hubing, Thomas Van Doren
Electrical and Computer Engineering Faculty Research & Creative Works
EMI through perforation patterns for airflow in shielding enclosures resulting from coupling of interior sources is investigated numerically with FDTD simulations and experimentally. The FDTD simulations are compared with measurements on perforation patterns. A simple empirical design approach for the relation between aperture size, the number of apertures and shielding effectiveness is extracted. A double perforation pattern structure is proposed for perforation pattern designs where a high percentage of open area is required. Frequencies where the enclosure will support cavity modes are of primary concern.
Modeling Multilayered Pcb Power-Bus Designs Using An Mpie Based Circuit Extraction Technique, Hao Shi, Jun Fan, James L. Drewniak, Todd H. Hubing, Thomas Van Doren
Modeling Multilayered Pcb Power-Bus Designs Using An Mpie Based Circuit Extraction Technique, Hao Shi, Jun Fan, James L. Drewniak, Todd H. Hubing, Thomas Van Doren
Electrical and Computer Engineering Faculty Research & Creative Works
A circuit extraction tool (CEMPIE) has been developed based on the mixed-potential integral equation (MPIE) using a quasi-static approximation. A power-bus in a multi-layered PCB consisting of a pair of dedicated ground and power planes is studied using this tool. The distributed behavior of a power-bus is represented by a collection of passive circuit elements, which is valid up to several gigahertz. The decoupling performance of a power-bus due to its layer spacing and the dielectric constant is evaluated for simple test geometries. The impact of the relative distance between the noise source and the potential receiver is also studied. …