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Articles 5011 - 5040 of 5729
Full-Text Articles in Physical Sciences and Mathematics
Materials Research & Manufacturing Section, Betsy Aldridge
Materials Research & Manufacturing Section, Betsy Aldridge
Sci-Tech News
No abstract provided.
Aerospace Section, Amy C. Smith
Science-Technology Division, Ann Koopman
Beyond The Chemistry Web, Bob Buchanan
Web Reviews, Diane F. Brenes
New Science And Technology Journals, Earl Mounts
Chemistry Division, A. Ben Wagner
From The Editor, Susan Fingerman
The Center Of Some Braid Groups And The Farrell Cohomology Of Certain Pure Mapping Class Groups, Craig A. Jensen, Yu Qing Chen, Henry H. Glover
The Center Of Some Braid Groups And The Farrell Cohomology Of Certain Pure Mapping Class Groups, Craig A. Jensen, Yu Qing Chen, Henry H. Glover
Mathematics Faculty Publications
In this paper we first show that many braid groups of low genus surfaces have their centers as direct factors. We then give a description of centralizers and normalizers of prime order elements in pure mapping class groups of surfaces with spherical quotients using automorphism groups of fundamental groups of the quotient surfaces. As an application, we use these to show that the primary part of the Farrell cohomology groups of certain mapping class groups are elementary abelian groups. At the end we compute the primary part of the Farrell cohomology of a few pure mapping class groups.
The Euler Characteristic Of The Whitehead Automorphism Group Of A Free Product, Craig A. Jensen, Jon Mccammond, John Meier
The Euler Characteristic Of The Whitehead Automorphism Group Of A Free Product, Craig A. Jensen, Jon Mccammond, John Meier
Mathematics Faculty Publications
A combinatorial summation identity over the lattice of labelled hypertrees is established that allows one to gain concrete information on the Euler characteristics of various automorphism groups of free products of groups. In particular, we establish formulae for the Euler characteristics of: the group of Whitehead automorphisms...
Research Strategies To Reduce Bovine Tuberculosis Transmission From Wildlife To Cattle, Are R. Brentensen, Mike R. Dunbar, Robert G. Mclean
Research Strategies To Reduce Bovine Tuberculosis Transmission From Wildlife To Cattle, Are R. Brentensen, Mike R. Dunbar, Robert G. Mclean
United States Department of Agriculture Wildlife Services: Staff Publications
Bovine tuberculosis (bTB) is a zoonotic disease caused by Mycobaterium bovis, and is transmissible to humans, wildlife and domestic livestock. In the northern Lower Peninsula of Michigan, white-tailed deer (Odocoileus virginianus) serve as a reservoir for the disease and pose a significant threat to domestic cattle and captive cervids. Scientists at USDA, APHIS, Wildlife Services, National Wildlife Research Center have designed a variety of laboratory and field studies aimed at reducing or eliminating bTB infection in cattle by interrupting the transmission of the disease from wildlife reservoirs. These strategies include reducing bTB in deer by delivery of …
Overview Of The First Use Of Gps 1991/Gis 1992 During A Wyoming Skunk Rabies Epizootic, Craig A. Ramey, Kenneth H. Mills, Marshall Robin
Overview Of The First Use Of Gps 1991/Gis 1992 During A Wyoming Skunk Rabies Epizootic, Craig A. Ramey, Kenneth H. Mills, Marshall Robin
United States Department of Agriculture Wildlife Services: Staff Publications
Striped skunks (Mephitis mephitis) are one of the most important reservoirs of wildlife rabies on the Great Plains of North America. During a skunk rabies epizootic in a previously rabies-free area of northwestern Wyoming, we studied the spread of rabies from the index case occurring in 1988 until the Shoshone River epizootic ended in 1993. All specimens were sent to the Wyoming State Veterinary Laboratory for Fluorescent Antibody Testing for rabies. The goal of federal, state, county, and local agencies was to address the public's fear about the health and safety of humans and animals. Following several rabid …
Modeling Costs Of Using Ovocontrol G For Managing Nuisance Canada Goose (Branta Canadensis) Populations, Joe N. Caudell, Stephanie A. Shwiff
Modeling Costs Of Using Ovocontrol G For Managing Nuisance Canada Goose (Branta Canadensis) Populations, Joe N. Caudell, Stephanie A. Shwiff
United States Department of Agriculture Wildlife Services: Staff Publications
OvoControl G is a relatively new product that reduces the hatchability of Canada goose (Branta canadensis) eggs. However, little data is available on the cost of application. We present a model for estimating the cost of application of OvoControl G for managing nuisance Canada goose populations. We found that at low goose densities, fixed labor costs are responsible for a significant portion of the cost. As goose densities increase, these fixed costs become equivalent to, and eventually less than, the costs associated with the purchase of the product. We present several scenarios that managers may employ to further …
Wildlife Responses To Vegetation Height Management In Cool-Season Grasslands, Brian E. Washburn, Thomas W. Seamans
Wildlife Responses To Vegetation Height Management In Cool-Season Grasslands, Brian E. Washburn, Thomas W. Seamans
United States Department of Agriculture Wildlife Services: Staff Publications
Herbaceous vegetation comprises the main habitat type in cool-seasons grasslands and can be managed by various methods. We compared changes in plant communities and bird and mammal use of grasslands that were not managed, managed by mechanical methods (mowing), or managed by chemical methods (plant growth regulator). This 1-year study was conducted from May through October 2003 in Erie County, Ohio. Twelve circular 1.5 ha plots were established: 4 were not managed, 4 were mowed to maintain vegetation height between 9–15 cm, and 4 were sprayed with a plant growth regulator and mowed when vegetation exceeded 15 cm. We monitored …
Phase-Locked Mutually Coupled 1.3 Μm Quantum-Dot Lasers, Stephen P. Hegarty, David Goulding, Bryan Kelleher, Guillaume Huyet, Maria-Teresa Todaro, Abdelmajid Salhi, Adriana Passaseo, Massimo De Vittorio
Phase-Locked Mutually Coupled 1.3 Μm Quantum-Dot Lasers, Stephen P. Hegarty, David Goulding, Bryan Kelleher, Guillaume Huyet, Maria-Teresa Todaro, Abdelmajid Salhi, Adriana Passaseo, Massimo De Vittorio
Cappa Publications
Fabry-Perot InAs quantum-dot lasers grown on GaAs substrates are mutually coupled with a delay of several nanoseconds. Stable phase-locked output with narrow linewidth is obtained when the frequency detuning between the two lasers is less than 4 GHz. This simple locking scheme could find application in a variety of photonics applications.
The Potential For Ch4-Enriched Biogas As A Transport Fuel In Ireland, Niamh Power
The Potential For Ch4-Enriched Biogas As A Transport Fuel In Ireland, Niamh Power
Theses
Ireland needs a biofuel industry- to aid compliance with the Kyoto Protocol, the Biofuels Directive and to secure its energ>' supply. The overall aim of this work is to assess the potential of CH4-enriched biogas as a transport fuel in Ireland. Biogas is produced during the anaerobic digestion of biomass. This work investigates biogas production from two different feedstocks; biodegradable municipal waste and agricultural crops. To assess the potential for biogas as a transport fuel the alternatives to biogas are investigated and compared. Thus digestion and composting of biodegradable municipal waste, and biogas and ethanol production from agricultural crops …
Tractor Test 1917: Farmtrac 675 Also 8075, Nebraska Tractor Test Lab
Tractor Test 1917: Farmtrac 675 Also 8075, Nebraska Tractor Test Lab
Nebraska Tractor Tests
ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …
Test 1893: John Deere 7630 Autoquad-Plus 20-Speed, Nebraska Tractor Test Lab
Test 1893: John Deere 7630 Autoquad-Plus 20-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
ABOUT THE TEST REPORT AND USE OF THE DATA
The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.
EXPLANATION OF THE TEST PROCEDURES
Purpose
The purpose of …
Test 1895: John Deere 7830 Autoquad-Plus 20-Speed, Nebraska Tractor Test Lab
Test 1895: John Deere 7830 Autoquad-Plus 20-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
ABOUT THE TEST REPORT AND USE OF THE DATA
The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.
EXPLANATION OF THE TEST PROCEDURES
Purpose
The purpose of …
Test 1900: New Holland Tg 215 Diesel 19-Speed, Nebraska Tractor Test Lab
Test 1900: New Holland Tg 215 Diesel 19-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
ABOUT THE TEST REPORT AND USE OF THE DATA
The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.
EXPLANATION OF THE TEST PROCEDURES
Purpose
The purpose of …
Test 1901: New Holland Tg 245 Diesel 19-Speed, Nebraska Tractor Test Lab
Test 1901: New Holland Tg 245 Diesel 19-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
ABOUT THE TEST REPORT AND USE OF THE DATA
The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.
EXPLANATION OF THE TEST PROCEDURES
Purpose
The purpose of …
Test 1907: Case-Ih Steiger 330 And 335 Diesel Also Case-Ih Stx 330 Diesel 16-Speed, Nebraska Tractor Test Lab
Test 1907: Case-Ih Steiger 330 And 335 Diesel Also Case-Ih Stx 330 Diesel 16-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
ABOUT THE TEST REPORT AND USE OF THE DATA
The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.
EXPLANATION OF THE TEST PROCEDURES
Purpose
The purpose of …
Test 1908: Case-Ih Steiger 380 And 385 Diesel 16-Speed Also Case-Ih Stx 380 Diesel 16-Speed, Nebraska Tractor Test Lab
Test 1908: Case-Ih Steiger 380 And 385 Diesel 16-Speed Also Case-Ih Stx 380 Diesel 16-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
ABOUT THE TEST REPORT AND USE OF THE DATA
The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.
EXPLANATION OF THE TEST PROCEDURES
Purpose
The purpose of …
Test 1909: Case-Ih Steiger 430 And 435 Diesel 16-Speed Also Case-Ih Stx 430 Diesel 16-Speed, Nebraska Tractor Test Lab
Test 1909: Case-Ih Steiger 430 And 435 Diesel 16-Speed Also Case-Ih Stx 430 Diesel 16-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
ABOUT THE TEST REPORT AND USE OF THE DATA
The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.
EXPLANATION OF THE TEST PROCEDURES
Purpose
The purpose of …
Test 1912: Case-Ih Magnum 275 And Mx 275 Diesel 19-Speed, Nebraska Tractor Test Lab
Test 1912: Case-Ih Magnum 275 And Mx 275 Diesel 19-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
ABOUT THE TEST REPORT AND USE OF THE DATA
The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.
EXPLANATION OF THE TEST PROCEDURES
Purpose
The purpose of …
Test 1913: Case-Ih Magnum 305 And Mx 305 Diesel 19-Speed, Nebraska Tractor Test Lab
Test 1913: Case-Ih Magnum 305 And Mx 305 Diesel 19-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
ABOUT THE TEST REPORT AND USE OF THE DATA
The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.
EXPLANATION OF THE TEST PROCEDURES
Purpose
The purpose of …
Test 1914: New Holland Tg 275 And T8030 Diesel 19-Speed, Nebraska Tractor Test Lab
Test 1914: New Holland Tg 275 And T8030 Diesel 19-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
ABOUT THE TEST REPORT AND USE OF THE DATA
The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data.
EXPLANATION OF THE TEST PROCEDURES
Purpose
The purpose of …
Nebraska Summary: S677 Case-Ih Maxxum 110 Pro, Nebraska Tractor Test Lab
Nebraska Summary: S677 Case-Ih Maxxum 110 Pro, Nebraska Tractor Test Lab
Nebraska Tractor Tests
ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …
Nebraska Summary: S637 Massey Ferguson 6490, Nebraska Tractor Test Lab
Nebraska Summary: S637 Massey Ferguson 6490, Nebraska Tractor Test Lab
Nebraska Tractor Tests
ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …