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Groundwater-Level Changes In Nebraska, 1996, Abraham H. Chen, Mohan J. Khisty

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Stanton County Test Hole Logs, Sue Olafsen Lackey, Frank A. Smith, Raymond R. Burchett

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Resource Notes-Academic Year 1998-99

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Resource News-Spring 1999

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Transition From Research To Operations: Arktos - A Knowledge-Based Sea Ice Classification System, Cheryl Bertoia, Denise Gineris, Kim Partington, Leen-Kiat Soh, Costas Tsatsoulis

School of Computing: Conference and Workshop Papers

ARKTOS is a fully automated intelligent system that classifies sea ice and that is now being used by the U.S. National Ice Center (NIC) for daily operations related to the NIC’s task of mapping the ice covered oceans. In this paper we describe the process of taking a research project and transitioning it to an operational environment. We discuss the theoretical methodologies implemented in ARKTOS, and how ARKTOS was developed, tested, and finally moved to operations.

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Using Teacher Reflective Practice To Evaluate Professional Development In Mathematics And Science, Vicki L. Wise, Amy N. Spiegel, Roger H. Bruning

Department of Educational Psychology: Faculty Publications

Systemic reform has been a key element of the mathematics and science educational agenda for the past decade. Systemic reform proponents advocate emphasizing mathemat-ics and science from kindergarten through l2th grade; adopting new math and science ed-ucation standards; providing ongoing professional development for teachers (Frechtling, Sharp, Carey, & Vaden-Kiernan, 1995); and aligning policy, practice, and assessment pro-cedures. The National Science Foundation (NSF) has supported the development of sys-temic reform by funding statewide, urban, and rural systemic initiatives to improve K–12 mathematics and science education throughout the United States (Fitzsimmons & Kerpel-man, 1994).

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The Insignificance Of Statistical Significance Testing, Douglas H. Johnson

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Despite their wide use in scientific journals such as The Journal of Wildlife Management, statistical hypothesis tests add very little value to the products of research. Indeed, they frequently confuse the interpretation of data. This paper describes how statistical hypothesis tests are often viewed, and then contrasts that interpretation with the correct one. I discuss the arbitrariness of P-values, conclusions that the null hypothesis is true, power analysis, and distinctions between statistical and biological significance. Statistical hypothesis testing, in which the null hypothesis about the properties of a population is almost always known a priori to be false, is …

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Changes In Early Winter Abundance Of Four Gull (Larus) Species On Western Lake Erie, 1951-1995, Laura A. Tyson, Richard A. Dolbeer, Jerrod L. Belant

United States Department of Agriculture Wildlife Services: Staff Publications

Many gulls (Larus spp.) that nest on and north of the Great Lakes concentrate along the south shore of western Lake Erie in early winter. Monitoring population trends of these gulls is important because of increasing conflicts between gulls and humans. We used data from four Christmas Bird Count locations to examine population trends of four gull species on western Lake Erie during nine 5-year periods, 1951-1995. Overall, ring-billed gulls (Z. delawarensis} were the dominant species (59% of gulls counted) followed by herring (Z. argentatus, 20%), Bonaparte's (Z. Philadelphia, 18%) and great blackbacked (Z. marinus, 0.2%) gulls. Ring-billed gulls displayed …

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Reality And Theory In A Collision, Norman Derby, Robert Fuller

Robert G. Fuller Publications

Billiard-ball collisions are frequently cited in introductory physics textbooks, usually as examples of elastic collisions. Many articles describing such collisions have appeared in this journal and elsewhere, but comparisons between theoretical results and actual collisions are rare, and most of the theoretical analyses have simply assumed friction to be negligible during the collision time. Students trying to simulate billiard-ball collisions on a popular simulation program such as Interactive Physics® may encounter interesting collisions, such as ones in which the cue ball is thrown up into the air when the frictional coefficients are set at even modest levels. We decided …

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Atrazine Degradation In A Small Stream In Iowa, Dana W. Kolpin, Stephen J. Kalkhoff

United States Geological Survey: Staff Publications

A study was conducted during 1990 through an 11.2-km reach of Roberts Creek in northeastern Iowa to determine the fate of atrazine in a surface water environment. Water samples were collected at ~1-month intervals from April through November during stable low to medium flow conditions and analyzed for atrazine and two of its initial biotic degradation products, desethylatrazine and deisopropylatrazine. Samples were collected on the basis of a Lagrangian model of streamflow in order to sample the same parcel of water as it moved downstream. Atrazine concentrations substantially decreased (roughly 25-60% ) between water entering and exiting the study reach …

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Quantitation Of Pyrethrum Residues In Brown Tree Snakes, John J. Johnston, Carol A. Furcolow, Stephanie A. Volz, Richard E. Mauldin, Thomas M. Primus, Peter J. Savarie, Joe E. Brooks

United States Department of Agriculture Wildlife Services: Staff Publications

A reversed-phase solid-phase extraction–gas chromatography (SPE–GC)–electron capture detection method is developed to quantitate individual rethrin residues in pyrethrum-exposed brown tree snakes. Aliquots (6 g) of homogenized snake tissue are extracted with 10 mL acetonitrile. The rethrins are recovered from the acetonitrile extract and concentrated using C₈ SPE. The rethrins are eluted from the SPE column with pentane, evaporated to near dryness, and reconstituted to 1 mL with 1-propanol. Individual rethrins are quantitated using GC analysis of the 1-propanol solution. Method limits of detection for rethrins range from 0.63 to 6.51 ng/g. The mean recovery for all rethrins is 70.8% …

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Are Shifts In Herbicide Use Reflected In Concentration Changes In Midwestern Rivers?, William Battaglin, Donald Goolsby

United States Geological Survey: Staff Publications

In many Midwestern rivers, elevated concentrations of herbicides occur during runoff events for 1-3 months following application. The highest or “peak” herbicide concentration often occurs during one of these runoff events. Herbicide concentrations in rivers are affected by a number of factors, including herbicide use patterns within the associated basin. Changing agricultural practices, reductions in recommended and permitted herbicide applications, shifts to new herbicides, and greater environmental awareness in the agricultural community have resulted in changes to herbicide use patterns. In the Midwestern United States, alachlor use was much larger in 1989 than in 1995, while acetochlor was not used …

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Late Quaternary Loess In Northeastern Colorado: Part I—Age And Paleoclimatic Significance, Daniel R. Muhs, John N. Aleinikoff, Thomas W. Stafford Jr., Rolf Kihl, Josh Been, Shannon A. Mahan, Scott Cowherd

United States Geological Survey: Staff Publications

Loess in eastern Colorado covers an estimated 14,000 km², and is the westernmost part of the North American midcontinent loess province. Stratigraphic studies indicate there were two periods of loess deposition in eastern Colorado during late Quaternary time. The first period spanned ca. 20,000 to 12,000 ¹⁴C yr B.P. (ca. 20–14 ka) and correlates reasonably well with the culmination and retreat of Pinedale glaciers in the Colorado Front Range during the last glacial maximum. The second period of loess deposition occurred between ca. 11,000 and 9,000 ¹⁴C yr B.P. This interval may be Holocene or may …

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A Review Of Issues Pertaining To Transgenic Turfgrasses, Paul G. Johnson, Terrance P. Riordan

Department of Agronomy and Horticulture: Faculty Publications

Recombinant DNA technology is a rapidly growing field in plant and animal breeding. This technology involves the transfer of pieces of DNA, or genes, regardless of the organisms involved or how they are related. Transformation procedures in plants were first developed for important crop and model plant systems. Although turfgrass management and production is one of the fastest growing areas of agriculture, genetic transformation of turfgrasses lags behind that of many other important crop plants. Turfgrasses are becoming more important primarily because of their association with the ever-increasing urban population. The size of the turfgrass seed market is second only …

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Plant Hybrid Zones And Insect Host Range Expansion, Diana Pilson

Diana Pilson Publications

The hybrid bridge hypothesis suggests that plant hybrids ‘‘bridge’’ the genetic gap between actual and potential host species, and that, for this reason, herbivorous insects are more likely to evolve an expanded host range in the presence of hybrids. While intuitively appealing, the hypothesis has two implicit assumptions: that phenotypic gaps between potential hosts limit host range, and that characters controlling host use are additively inherited in plant hybrids. Evaluation of these assumptions suggests that operation of the hybrid bridge hypothesis is relatively uncommon. In addition, the hypothesis has not been well integrated into existing theoretical and empirical work on …

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Capillary Electrophoresis/Tandem Mass Spectrometry With Array Detection, L.J. Deterding, K.B. Tomer, J.M.Y. Wellemans, Ronald Cerny, M.L. Gross

Ronald Cerny Publications

Mixtures of standard compounds of biological interest were analyzed by capillary electrophoresis in conjunction with tandem four sector mass spectrometry (MS/MS) using an array detector. Capillary electrophoresis offers extremely high separation efficiencies while array detection allows for the simultaneous acquisition of a large fraction of a tandem mass spectrum and high utilization of the sample ions produced. Consequently, improvements in sensitivity and structural information were observed for the combined techniques in comparison to similar measurements with a four-sector and a single-point detector. Coaxial continuous-flow fast atom bombardment was used to create (M + H) precursor ions of the separated analyses …

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Affinity Chromatography: A Review Of Clinical Applications, David S. Hage

David Hage Publications

Affinity chromatography is a type of liquid chromatography that makes use of biological-like interactions for the separation and specific analysis of sample components. This review describes the basic principles of affinity chromatography and examines its use in the testing of clinical samples, with an emphasis on HPLCbased methods. Some traditional applications of this approach include the use of boronate, lectin, protein A or protein G, and immunoaffinity supports for the direct quantification of solutes. Newer techniques that use antibody-based columns for on- or off-line sample extraction are examined in detail, as are methods that use affinity chromatography in combination with …

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The Classification Of Limits Of 2n-Cycle Algebras, Allan P. Donsig, S. C. Power

Department of Mathematics: Faculty Publications

We obtain a complete classification of the locally finite algebras A₀= ͢alg lim A_kand the operator algebras A = ͢lim A_kassociated with towers A₁≤ A₂≤ A₃... consisting of 2n-cycle algebras, where n ≥ 3, with the inclusions of rigid type. The complete isomorphism invariant is essentially the triple (K₀(A), H₁(A), ∑(A)) where K₀(A) is viewed as a scaled ordered group, H₁(A) is partial isometry homology group and …

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Scienceworks: A University-Based Science Outreach Group, Rochelle Payne Ondracek, Diandra Leslie-Pelecky

Diandra Leslie-Pelecky Publications

ScienceWorks is a science and engineering outreach group at the University of Nebraska- Lincoln, comprised of faculty, graduate students, undergraduates and community volunteers. We are brought together by one goal - to make science fun and accessible for everyone. ScienceWorks has developed over 30 modules that emphasize a range of scientific and engineering topics and guide the participants in discovery-based learning. Modules cover a wide variety of topics, including pressure, materials, electromagnetism, archaeology, DNA, optics and fracture. Most ScienceWorks modules involve hands-on activities. In Electromagnetism for example, students are asked to use a length of wire and a nail to …

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Ontogenetic Shifts In Canion Attractiveness To Brown Tree Snakes (Boiga Irregularis), John A. Shivik, Larry Clark

United States Department of Agriculture Wildlife Services: Staff Publications

The brown tree snake (Boiga irregularis) is a nocturnal, primarily arboreal, rear-fanged colubrid native to parts of Australasia (Savidge, 1987; Greene, 1989). Throughout their range, brown tree snakes eat a variety of prey including lizards, rats, and birds (Greene, 1989; Shine, 1991; Rodda, 1992; Rodda et al., in press). Brown tree snakes on Guam have a wide diet consisting mainly of lizards and lizard eggs, but a variety of other items were found in snake stomachs, including odd items such as cooked spareribs (Savidge, 1988). Savidge (1988) noted an ontogenetic shift in Guam brown tree snake diets; small …

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Capsicum-Laden Soils Decrease Contact Time By Northern Pocket Gophers, Ray T. Sterner, Kelly Hollenbeck, Stephen Shumake

United States Department of Agriculture Wildlife Services: Staff Publications

Fossorial rodents damage lawns/water impoundments/ crops. We conducted a two-choice, parametric-type study to determine the effects of capsicum-oleoresin/soil mixtures (0.00, 0.75, 1.50, and 2.25%) upon soil-contact, soil-digging, and pelage-grooming behaviors in northern pocket gophers (Thomomys talpoides). In 3 alternate-day (1-h/day) exposures to ≥1.50% capsicum-oleoresin soil mixtures, gophers decreased mean soil contact time by 46% relative to placebo-exposed animals. Grooming time yielded a concentration x trial interaction that showed intense grooming by capsicum-exposed animals during trial 1, with "convergence" of times to near those of the "placebos" (0.00% capsicum oleoresin) by trial 3. The significant decrease in grooming activity …

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Trapping Considerations For The Fossorial Pocket Gopher, Gary W. Witmer, Rex Marsh, George Matschke

United States Department of Agriculture Wildlife Services: Staff Publications

Fossorial mammals such as the pocket gopher (Thomomys spp.) are well adapted to life in an underground closed burrow system. These animals can have considerable influence on ecosystems and can cause significant damage to agricultural crops, forest resources, and field machinery. The research and management of pocket gopher populations poses many challenges to land managers and research biologists. Both live-trapping for research purposes and kill trapping for control purposes are important tools for working with pocket gophers. Trapping can be an effective and efficient tool if the proper traps are used and trappers are trained to place traps properly …

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Effective Of Preventive Coyote Hunting On Sheep Losses To Coyote Predation, Kimberly Wagner, Michael Conover

United States Department of Agriculture Wildlife Services: Staff Publications

Aerial hunting is commonly used by agriculture agencies in the Intermountain West to reduce coyote (Canis latrans) predation on domestic sheep. We assessed the effect of aerial hunting of coyotes on sheep losses to coyotes, and the need for corrective predation management (hours of work, device nights) on the same pastures when sheep arrived for the subsequent summer grazing season (3-6 months after aerial hunting). Comparisons were made between paired pastures with (treated) and without (untreated) winter aerial hunting from helicopters. Average (x ± SE) pasture size was 45.2 ± 14.1 km² (n = 21) for treated …

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Repellents To Reduce Cable Gnawing By Northern Pocket Gophers, Stephen A. Shumake, Ray T. Sterner, Stanley E. Gaddis

United States Department of Agriculture Wildlife Services: Staff Publications

There is a continuing need to develop improved repellent formulations to protect buried cable installations from damage by problem wildlife. We evaluated 2.0% mass/mass levels of capsaicin and denatonium benzoate in a polybutene carrier material (Indopol®) and an aboveground, rodent-deer plastic mesh barrier (Vexar®) for reducing gnawing by northern pocket gophers (Thomomys talpoides) on communications cable (RG-8U). When treatments were applied as surface coatings, neither capsaicin nor denatonium samples were lower (P > 0.05) in measnres of cable damage compared to control (Indopol® alone) or samples treated with Vexar® plastic mesh. When the test was repeated with a new …

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A Memorial For William V. Sliter, Robert G. Douglas, Jere H. Lipps, James C. Ingle Jr., John Barron

United States Geological Survey: Staff Publications

William V. (Bill) Sliter, an internationally known micropaleontologist and research geologist for the U.S. Geological Survey, passed away suddenly, October, 1997, while talking to a colleague in his office. In his honor, B. Huber, T. Bralower, and M. Leckie organized a keynote symposium ‘‘Paleoecological and Geochemical Signatures of Cretaceous Anoxic Events’’ at the 1998 annual meeting of the Geological Society of America in Toronto, Canada. This theme issue of the Journal of Foraminiferal Research contains the published papers from the symposium and is dedicated to his memory.

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Comparison Of An Enzyme-Linked Immunosorbent Assay (Elisa) To Gas Chromatography (Gc) - Measurement Of Polychlorinated Biphenyls (Pcbs) In Selected Us Fish Extracts, James L. Zajicek, Donald E. Tillitt, Ted R. Schwartz, Christopher J. Schmitt, Robert O. Harrison

United States Geological Survey: Staff Publications

The analysis of PCBs in fish tissues by immunoassay methods was evaluated using fish collected from a US monitoring program, the National Contaminant Biomonitoring Program of the US Department of Interior, Fish and Wildlife Service. Selected composite whole fish samples, which represented widely varying concentrations and sources of PCBs, were extracted and subjected to congener PCB analysis by gas chromatography (GC) and total PCB analysis using an ELISA (ePCBs) calibrated against technical Aroclor 1248. PCB congener patterns in these fishes were different from the patterns found in commercial Aroclors or their combinations as demonstrated by principal component analysis of normalized …

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200,000 Years Of Climate Change Recorded In Eolian Sediments Of The High Plains Of Eastern Colorado And Western Nebraska, Daniel R. Muhs, James Swinehart, David Loope, John N. Aleinikoff, Josh Been

United States Geological Survey: Staff Publications

Loess and eolian sand cover vast areas of the western Great Plains of Nebraska, Kansas and Colorado (Fig. 1). In recent studies of Quaternary climate change, there has been a renewed interest in loess and eolian sand. Much of the attention now given to loess stems from new studies of long loess sequences that contain detailed records of Quaternary glacial-interglacial cycles, thought to be a terrestrial equivalent to the foraminiferal oxygen isotope record in deep-sea sediments (Fig. 2). Loess is also a direct record of atmospheric circulation, and identification of loess paleowinds in the geologic record can test atmospheric general …

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Finite Element Analysis Solution Applications To Photoreceptor Modules, Robert Hildebrand

Theses

One of the primary components in a Xerox copier is the print engine. The center of this engine is comprised of a photoreceptor, which is a roller/belt module mounted to a frame. The belt revolves around the module acquiring and transposing toner to sheets of paper as they come into contact with the module. The initial design of these modules can often lead to registration and print quality problems later in the assembly and application phases of design. The current analysis procedure includes lengthy commercial FEA packages that require high designer investment. For this reason, many new ideas are never …

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Improving Educational Opportunities For Mexican Immigrants : An Educational Manual For High School Educators To Understand, Assist, And Prepare Mexican Immigrants For The Next Millennium, Antonio Moreno

Master's Projects

No abstract provided.

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A Proposed Defense To Patent Infringement, Alfonso Garcia Chan

Computer Law Review and Technology Journal

The American patent system is a major catalyst for technological progress and economic growth. In most cases, the system works well to achieve those ends. In rare but significant circumstances, however, the patent system can be manipulated to suppress technological progress. Unlike patent rights in other nations, the American patent grant is a negative right to exclude others. Thus, the patent owner need not practice or license others to practice the invention. Indeed, a patent owner has the right to do nothing for the lifetime of the patent. A patent owner's lack of action, however, could prevent progress in a …

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Full-Text Articles in Entire DC Network

Groundwater-Level Changes In Nebraska, 1996, Abraham H. Chen, Mohan J. Khisty

Conservation and Survey Division: Faculty and Staff Publications

Stanton County Test Hole Logs, Sue Olafsen Lackey, Frank A. Smith, Raymond R. Burchett

Conservation and Survey Division: Faculty and Staff Publications

Resource Notes-Academic Year 1998-99

Conservation and Survey Division: Faculty and Staff Publications

Resource News-Spring 1999

Conservation and Survey Division: Faculty and Staff Publications

Transition From Research To Operations: Arktos - A Knowledge-Based Sea Ice Classification System, Cheryl Bertoia, Denise Gineris, Kim Partington, Leen-Kiat Soh, Costas Tsatsoulis

School of Computing: Conference and Workshop Papers

Using Teacher Reflective Practice To Evaluate Professional Development In Mathematics And Science, Vicki L. Wise, Amy N. Spiegel, Roger H. Bruning

Department of Educational Psychology: Faculty Publications

The Insignificance Of Statistical Significance Testing, Douglas H. Johnson

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Changes In Early Winter Abundance Of Four Gull (Larus) Species On Western Lake Erie, 1951-1995, Laura A. Tyson, Richard A. Dolbeer, Jerrod L. Belant

United States Department of Agriculture Wildlife Services: Staff Publications

Reality And Theory In A Collision, Norman Derby, Robert Fuller

Robert G. Fuller Publications

Atrazine Degradation In A Small Stream In Iowa, Dana W. Kolpin, Stephen J. Kalkhoff

United States Geological Survey: Staff Publications

Quantitation Of Pyrethrum Residues In Brown Tree Snakes, John J. Johnston, Carol A. Furcolow, Stephanie A. Volz, Richard E. Mauldin, Thomas M. Primus, Peter J. Savarie, Joe E. Brooks

United States Department of Agriculture Wildlife Services: Staff Publications

Are Shifts In Herbicide Use Reflected In Concentration Changes In Midwestern Rivers?, William Battaglin, Donald Goolsby

United States Geological Survey: Staff Publications

Late Quaternary Loess In Northeastern Colorado: Part I—Age And Paleoclimatic Significance, Daniel R. Muhs, John N. Aleinikoff, Thomas W. Stafford Jr., Rolf Kihl, Josh Been, Shannon A. Mahan, Scott Cowherd

United States Geological Survey: Staff Publications

A Review Of Issues Pertaining To Transgenic Turfgrasses, Paul G. Johnson, Terrance P. Riordan

Department of Agronomy and Horticulture: Faculty Publications

Plant Hybrid Zones And Insect Host Range Expansion, Diana Pilson

Diana Pilson Publications

Capillary Electrophoresis/Tandem Mass Spectrometry With Array Detection, L.J. Deterding, K.B. Tomer, J.M.Y. Wellemans, Ronald Cerny, M.L. Gross

Ronald Cerny Publications

Affinity Chromatography: A Review Of Clinical Applications, David S. Hage

David Hage Publications

The Classification Of Limits Of 2n-Cycle Algebras, Allan P. Donsig, S. C. Power

Department of Mathematics: Faculty Publications

Scienceworks: A University-Based Science Outreach Group, Rochelle Payne Ondracek, Diandra Leslie-Pelecky

Diandra Leslie-Pelecky Publications

Ontogenetic Shifts In Canion Attractiveness To Brown Tree Snakes (Boiga Irregularis), John A. Shivik, Larry Clark

United States Department of Agriculture Wildlife Services: Staff Publications

Capsicum-Laden Soils Decrease Contact Time By Northern Pocket Gophers, Ray T. Sterner, Kelly Hollenbeck, Stephen Shumake

United States Department of Agriculture Wildlife Services: Staff Publications

Trapping Considerations For The Fossorial Pocket Gopher, Gary W. Witmer, Rex Marsh, George Matschke

United States Department of Agriculture Wildlife Services: Staff Publications

Effective Of Preventive Coyote Hunting On Sheep Losses To Coyote Predation, Kimberly Wagner, Michael Conover

United States Department of Agriculture Wildlife Services: Staff Publications

Repellents To Reduce Cable Gnawing By Northern Pocket Gophers, Stephen A. Shumake, Ray T. Sterner, Stanley E. Gaddis

United States Department of Agriculture Wildlife Services: Staff Publications

A Memorial For William V. Sliter, Robert G. Douglas, Jere H. Lipps, James C. Ingle Jr., John Barron

United States Geological Survey: Staff Publications

Comparison Of An Enzyme-Linked Immunosorbent Assay (Elisa) To Gas Chromatography (Gc) - Measurement Of Polychlorinated Biphenyls (Pcbs) In Selected Us Fish Extracts, James L. Zajicek, Donald E. Tillitt, Ted R. Schwartz, Christopher J. Schmitt, Robert O. Harrison

United States Geological Survey: Staff Publications

200,000 Years Of Climate Change Recorded In Eolian Sediments Of The High Plains Of Eastern Colorado And Western Nebraska, Daniel R. Muhs, James Swinehart, David Loope, John N. Aleinikoff, Josh Been

United States Geological Survey: Staff Publications

Finite Element Analysis Solution Applications To Photoreceptor Modules, Robert Hildebrand

Theses

Improving Educational Opportunities For Mexican Immigrants : An Educational Manual For High School Educators To Understand, Assist, And Prepare Mexican Immigrants For The Next Millennium, Antonio Moreno

Master's Projects

A Proposed Defense To Patent Infringement, Alfonso Garcia Chan

Computer Law Review and Technology Journal