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Articles 1 - 30 of 188
Full-Text Articles in Physical Sciences and Mathematics
Improving Physics Teaching, Robert Fuller
Improving Physics Teaching, Robert Fuller
Robert G. Fuller Publications
I began this editorial with a desire to take up battle against the recent ills of physics teaching. I paused to peruse the AAPT reprint book, 50 Years on Teaching Physics, edited by Melba Phillips.
Trends In The Theory Of Atomic Photoionization, Anthony F. Starace
Trends In The Theory Of Atomic Photoionization, Anthony F. Starace
Anthony F. Starace Publications
For VUV photon energies, detailed theoretical understanding of the photoionization process has been achieved for the case of a single electron ionized from one of the outer subshells of a closed-shell atom. This understanding is based qualitatively upon a few properties of realistic atomic central potentials and quantitatively upon a few distinct types of electronic interactions known generically as particle-hole interactions. Current theoretical research is mainly directed at understanding a broader class of atomic photoionization phenomena involving, e.g., open-shell atoms, electronic interactions not of the particle-hole class, real two-electron processes, and external electric and magnetic fields.
Water Current, Volume 12, No. 6, November/December 1980
Water Current, Volume 12, No. 6, November/December 1980
Water Current Newsletter
Proposal Deadline for OWRT Annual Cooperative Program
New Staff Addition
Legislative Record Available
General Guidelines Available
Water Resource Seminar Series
MRBC Launches Missouri River Flood Plain Study
Interim Study on Irrigated Western Farmlands Indicates Most Are Small Operations
Federal Water Resources Research Priorities
Research Review: Remotely Sensed Crop Temperatures for Water Resources Management
The Probe, Issue 9 - November 1980
The Probe, Issue 9 - November 1980
The Probe: Newsletter of the National Animal Damage Control Association
Contents: Cecil D. Andrus, lawsuit All Together Now – Let’s Sue Andrus desert tortoise Treasury Reports Ken Green of Avitrol Corporation has an article in PEST CONTROL Black-footed ferret A new social disease, "coyotitis" The Brotherhood Rats Regulation Scoreboard: Government 80 : Taxpayer 0 Coleman Company has just introduced a little gadget Ol’ Timer’s Corner: Walt Boehm, Virgil Parsons, Mark Worcester NRA Hunting Annual Wildlife Legislative Fund of America Blueberries added to the list of fruits that can be sprayed with MESUROL TRAPPING BENEFITS PEOPLE AND WILD ANIMALS William D. Fitzwater
Vegetative Community Descriptions For The North Platte River In Wyoming And Nebraska, Lynn Fisher
Vegetative Community Descriptions For The North Platte River In Wyoming And Nebraska, Lynn Fisher
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
A description of the vegetative communities in an area will provide an insight to wildlife potential and use of that area. Wildlife and its corresponding habitat are recognized as important for recreation and to the overall environmental quality of an area. The Water and Power Resources Service, Lower Missouri Region, is presently engaged in a study of the Platte River Basin, including an evaluation of wildlife habitat and associated environmental needs. Quantification of wildlife habitat along the South Platte River has been completed. Vegetation communities were described and habitat maps were prepared from color infrared aerial photographs (scale – 1:24,000). …
Epizootic Of Coccidiosis In Free-Flying Lesser Scaup, R. M. Windingstad, M. E. Mcdonald, L. N. Locke, S. M. Kerr, J. A. Sinn
Epizootic Of Coccidiosis In Free-Flying Lesser Scaup, R. M. Windingstad, M. E. Mcdonald, L. N. Locke, S. M. Kerr, J. A. Sinn
Nebraska Game and Parks Commission: Staff Research Publications
A coccidiosis epizootic has occurred in lesser scaup (Aythsa affinis) at Bluestem Reservoir in eastern Nebraska during the spring in each of three recent years: 1976-1978. Losses peaked during the period from mid-March through April. As much as 29 % of the peak population of scaup using the reservoir died. Necropsies of 72 of the nearly 1390 scaup that died revealed destruction and sloughing of the intestinal mucosa and associated hemorrhaging. Fibrinonecrotic cores were frequently found in the intestinal lumens. Scrapings from the intestinal mucosal contained massive numbers of oocysts of the coccidian Eimeria aythyae. This is …
Computed Cross Sections For Electron Transfer In Ba+ + Ba+ Collisions , Stanley J. Sramek, J.H. Macek, Gordon A. Gallup
Computed Cross Sections For Electron Transfer In Ba+ + Ba+ Collisions , Stanley J. Sramek, J.H. Macek, Gordon A. Gallup
Gordon Gallup Publications
Cross sections have been computed for the electron-transfer process Ba++Ba+→Ba+Ba++, for collision energies ranging from 25 to 500 keV. The straight-line classical-trajectory method has been used, with basis functions obtained by the multiconfiguration valence-bond method. Several numerical procedures applicable to future treatments of similar large systems were developed. The maximum cross-section value is found to be around 27π a02 (2.4 × 10-15 cm2), and occurs near collision energy 500 keV. The system's transient behavior has also been studied in detail during the collision, and it has been found that …
Orientation And Alignment Of The 3P 1P And 4D 1D Levels Of Neutral Helium, R. M. Schectman, R. D. Hight, S. T. Chen, L. J. Curtis, H. G. Berry, Timothy J. Gay, R. Deserio
Orientation And Alignment Of The 3P 1P And 4D 1D Levels Of Neutral Helium, R. M. Schectman, R. D. Hight, S. T. Chen, L. J. Curtis, H. G. Berry, Timothy J. Gay, R. Deserio
Timothy J. Gay Publications
The alignment and orientation produced by the tilted-foil excitation of He was studied for a wide range of foil tilt angles and outgoing-atom velocities. In particular, two quantum states of different orbital angular momentum (3p 1P and 4d 1D) were investigated and the results were compared with a number of previously proposed models.
The Prairie Naturalist Volume 12, Numbers 3 And 4. September–December 1980
The Prairie Naturalist Volume 12, Numbers 3 And 4. September–December 1980
The Prairie Naturalist
THE FLORA AND SANDHILLS PRAIRIE COMMUNITIES OF ARAPAHO PRAIRIE, ARTHUR COUNTY, NEBRASKA ▪ K. H. Keeler, A. T. Harrison and L. S. Vescio
USE OF ULTRASONIC SOUND TO ESTIMATE BODY FAT DEPOTS IN THE MALLARD ▪ G. A. Baldassarre, R. J. Whyte and E. G. Bolen
NORTHERN MOCKINGBIRD BREEDING IN NORTH DAKOTA ▪ D. Child, J. Fontaine, T. Gatz, M. Johnson and J. Oswald
SPRING ARRIVAL OF BIRDS AT WOODWORTH, NORTH DAKOTA ▪ K. F. Higgins, L. M. Kirsch, and J. M. Callow
HYBRIDIZATION AND TAXONOMIC STATUS OF GREATER PRAIRIE CHICKENS AND SHARP-TAILED GROUSE (HYBRIDIZATION IN GROUSE) ▪ D. W. …
Photoionization Cross Section For He In The Hyperspherical Coordinate Method, Donald L. Miller, Anthony F. Starace
Photoionization Cross Section For He In The Hyperspherical Coordinate Method, Donald L. Miller, Anthony F. Starace
Anthony F. Starace Publications
The hyperspherical coordinate method developed by Macek, Fano, Lin, and Klar to describe two-electron correlations is used for the first time to treat an atomic photoionization process. Using adiabatic approximations for both the initial and the final state, the cross section for the process He +γ +He+1s +e– is calculated and is found to lie 1% higher than the revised experimental data of Samson at threshold, 4% lower at 1 Ryd above threshold, and 12% lower at 1.9 Ryd above threshold.
Climate Of Nebraska, Richard E. Myers
Climate Of Nebraska, Richard E. Myers
Conservation and Survey Division
No abstract provided.
Water Current, Volume 12, No. 5, September/October 1980
Water Current, Volume 12, No. 5, September/October 1980
Water Current Newsletter
From the Desk of the Director
Research Proposal Deadlines
"Focus Area" R&D Proposals Submitted
NWRC Research Program
Water Resources Seminar Series
FER Workshop
Global Report 2000 Completed
Groundwater Controls Necessary
Research Review: Public Attitudes of Nebraskans Toward Water Policy
Heavy Ion Beam Model For Radiobiology, Rose Ann Roth, Robert Katz
Heavy Ion Beam Model For Radiobiology, Rose Ann Roth, Robert Katz
Robert Katz Publications
An ad hoc model of energetic heavy ion beams, including secondary and tertiary particles, has been constructed for predicting radiobiological experiments. While the beam model is relatively primitive, it yields depth-dose and depth-radiobiological calculations in good agreement with experiment upstream of the Bragg peak. Beyond the peak, the model is somewhat coarse grained and seems to underestimate low-LET fragment production. These defects can be repaired at some cost in computer time. Presently a complete set of depth-dose and radiobiological results (RBE, OER, aerobic and hypoxic survival) is obtained in 4–8 min, for a single beam, at a cost of $10. …
The Probe, Issue 8 - September 1980
The Probe, Issue 8 - September 1980
The Probe: Newsletter of the National Animal Damage Control Association
Contents: Probing for the Probe Who says ADC doesn’t cover the waterfront!? And the Dumps Too! U.S. Fish and Wildlife Service Animal Damage Control Activities (Operational and Extension) Bats Steel Leg Hold Live Trap by Milton Caroline Ol’Timer’s Corner: Cliff Presnall EPA Key to Post Mortem Symptoms Some Coyotes Can’t Wait Animal Rights by Homer S. Ford Seen any Black-footed Ferrets Recently? William D. Fitzwater
Epa Profile Of Environmental Quality Nebraska, Kathleen Q. Camin
Epa Profile Of Environmental Quality Nebraska, Kathleen Q. Camin
United States Environmental Protection Agency: Staff Publications
Nebraska, Iowa, Kansas, and Missouri, which make up EPA Region VII, are among the leading corn and wheat producing States in the Nation_ These States also produce a significant share of the soybean, grain sorghum, fat cattle, and finished hogs that are supplied to American and foreign markets.
Although the States in Region VII can best be characterized as rural, 65 percent of their nearly 12 million people live in urban areas. In Nebraska, metropolitan areas such as Omaha 4 have environmental problems resulting from major industrial operations, municipal services, transportation, and energy production. Metropolitan areas, however, do not have …
Theoretical Potential Curves For Excited States Of Arh And The Rate Of Collisional Quenching Of Metastable Ar By H, R.L. Vance, Gordon A. Gallup
Theoretical Potential Curves For Excited States Of Arh And The Rate Of Collisional Quenching Of Metastable Ar By H, R.L. Vance, Gordon A. Gallup
Gordon Gallup Publications
Energy curves for the ground state and the first seven excited states of ArH have been calculated using the multiconfiguration valence bond (MCVB) method. Important features of the excited curves include two distinct avoided crossings between the lowest Ar*H and the highest ArH* potential energy curves. Using these curves we have made a theoretical analysis of quenching of metastable Ar by collision with H at room temperature. Application of the Massey criterion indicates that the separation of the potential curves in the region of the crossing and the acceleration produced by the fall of the reactant channel potential curve from …
Irrigation Scheduling Of Corn Utilizing Infrared Thermometry, Kirk L. Clawson
Irrigation Scheduling Of Corn Utilizing Infrared Thermometry, Kirk L. Clawson
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Water Current, Volume 12, No. 4, July/August 1980
Water Current, Volume 12, No. 4, July/August 1980
Water Current Newsletter
New Director for Water Center
OWRT Five-Year Research Planning Program
Dr. Gary Lewis Resigns
Water Conservation Practices Preserve Finite Water Supply
MRBC Prepares Draft Environmental Impact Statement
Water and Power Resources Service
Water Policy Implementation Report
Changes at WRC
Research Review: Management of Irrigated Agriculture With a Limited Water and Energy Supply
Phase Transition Effects: A Crystallographic Characterization Of The Temperature Dependency Of The Crystal Structure Of The 1:1 Charge Transfer Complex Between Anthracene And Tetracyanobenzene In The Temperature Range 297 To 119 K, John J. Stezowski
John J. Stezowski Publications
Crystal structures of the charge transfer complex between anthracene and tetracyanobenzene, A:TCNB, C14H10: C10H2N4, at three temperatures (297, 234 and 226 K) above the order–disorder phase transition at 206 K and at four temperatures (202, 170, 138, and 119 K) below it have been determined from x-ray diffraction data. The space group of the room temperature phase was assigned as Cm with a = 9.528(2), b =12.779(3), c = 7.441(2) Å and β=92.39(2) degrees at 297 K and for the low temperature phase is P21/a with a =9.457(1), …
Effect Of Hydrostatic Pressure On The Incommensurate Phase Of K2Seo4, W. Press, C. F. Majkrzak, J. D. Axe, John R. Hardy, N. E. Massa, F. G. Ullman
Effect Of Hydrostatic Pressure On The Incommensurate Phase Of K2Seo4, W. Press, C. F. Majkrzak, J. D. Axe, John R. Hardy, N. E. Massa, F. G. Ullman
John R. Hardy Papers
A neutron scattering study of the effect of hydrostatic pressure on the incommensurate phase transformation in K2SeO4 was performed in order to obtain information concerning the nature of the competing forces that give rise to a structural instability at a general wave vector. It was found that an increase in pressure lowers the transition temperature (dTi/dPi = - 6.5 K/kbar) and results in a smaller value of the initial incommensurate wave vector. The pressure dependence of the incommensurate to ferroelectric phase transition was also investigated (dTc/dPc = …
The Probe, Issue 7 - July 1980
The Probe, Issue 7 - July 1980
The Probe: Newsletter of the National Animal Damage Control Association
Contents: Bureau of Land Management (BLM) land in Alaska burro removal frormBandelier National Monument (New Mexico)and Grand Canyon National Park (Arizona) toxicants to alleviate blackbird problems in Kentucky DMCT, a presumably nontoxic fluorescent tooth and bone marking agent PYTHONS TO GET GRIP ON ADC PROBLEM lion killed 16 registered angora billies MINORS MAKE MAJOR DECISION Exotic parakeets VERTEBRATE PEST CONFERENCE PROCEEDINGS MEETINGS OF INTEREST NEW ADC PATCH NEEDED? William D. Fitzwater
Addendum To "Ab Initio Treatment Of Final-State Spin-Orbit Interactions: Photoionization Of The 6s Electron In Cesium", Keh-Ning Huang, Anthony F. Starace
Addendum To "Ab Initio Treatment Of Final-State Spin-Orbit Interactions: Photoionization Of The 6s Electron In Cesium", Keh-Ning Huang, Anthony F. Starace
Anthony F. Starace Publications
A previous calculation of the cesium 6s→εp photoionization cross section is extended to include interchannel coupling to the 5p→εd photoionization channels. For photon energies in the range 0.35 a.u.≲ℏω≲1.12 a.u., i.e., just above the near-threshold cross-section minimum, the 6s photoionization cross section is found to be dominated by 5p→5d resonance transitions. No experimental data exist for this energy region.
Groundwater Levels In Nebraska, 1979, Martin S. Johnson, Darryll T. Pederson
Groundwater Levels In Nebraska, 1979, Martin S. Johnson, Darryll T. Pederson
Conservation and Survey Division
No abstract provided.
Test 1354: Hesston Fiat 980dt And 980 Diesel 16-Speed, Nebraska Tractor Test Lab
Test 1354: Hesston Fiat 980dt And 980 Diesel 16-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …
Supralinearity Of Peak 5 And Peak 6 In Tld-700, Michael P. R. Waligórski, Robert Katz
Supralinearity Of Peak 5 And Peak 6 In Tld-700, Michael P. R. Waligórski, Robert Katz
Robert Katz Publications
Track theory has been applied to an earlier suggestion, that the supralinearity of TLDs at high gamma-ray doses is due to pre-existing 1-hit and 2-hit trap structures, to calculate high-LET response. Measured 60Co dose responses for peaks 5 and 6 in LiF (TLD- 700) were decomposed to yield parameters characterizing each peak as a two-component c-hit mixture. One value of “trap radius” was assigned to each two-component representation, different for peak 5 and for peak 6, to calculate their responses for H, He, C, O, and Ne bombardments. Calculations reproduce experimental features of the heavy ion response of TLD-700, and …
The Prairie Naturalist Volume 12, Number 2. June 1980
The Prairie Naturalist Volume 12, Number 2. June 1980
The Prairie Naturalist
COMPOSITION OF BEAVER CACHES ON THE TONGUE RIVER IN MONTANA ▪ J. E. Swenson and S. J. Knapp
GRAY PARTRIDGE WINTER MOVEMENTS AND HABITAT USE IN NORTH DAKOTA ▪ J. W. Schulz
ANNOTATED CHECKLIST OF MAMMALS OF NEBRASKA ▪ J. K. Jones, Jr. and J. R. Choate
OBSERVATIONS OF SEVERAL ARCTIC GULLS IN NORTH DAKOTA ▪ C. A. Faanes and T. A. Gatz
WINTER FOOD HABITS OF NEBRASKA BOBCATS (Felis rufus) C. J Mahan
NOTE
The Meadow Jumping Mouse in Southeastern Montana ▪ W. L. Matthews
Whale Meat In The Japanese Diet, Robert L. Brownell Jr., Hideo Omura
Whale Meat In The Japanese Diet, Robert L. Brownell Jr., Hideo Omura
United States Department of Commerce: Staff Publications
Junghans (Letters, 4 Apr., p. 6) points out several errors in Beary’s letter (14 December 1979, p. 1260) regarding the high concentrations of mercury in whale meat eaten by the Japanese. We would like to call attention to some additional errors in Beary’s letter.
Test 1352: Hesston Fiat 680 Dt And 680 Diesel 8-Speed, Nebraska Tractor Test Lab
Test 1352: Hesston Fiat 680 Dt And 680 Diesel 8-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …
Test 1353: Hesston Fiat 880 Dt-5 And 880-5 Diesel 12-Speed, Nebraska Tractor Test Lab
Test 1353: Hesston Fiat 880 Dt-5 And 880-5 Diesel 12-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …
Test 1350: John Deere 2040 Diesel 8-Speed, Nebraska Tractor Test Lab
Test 1350: John Deere 2040 Diesel 8-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …