Digital Commons Network^™

Auger Timing Effects On Performance Of A Combine Unloading System, Todd Philip Cole

Open Access Master's Theses (through 2010)

Performance effects were measured on a combine unloading system using three different auger timing settings.Performance measures included maximum startup torque, mean operating torque, standard deviation of the operating torque, flow rate of grain through the system, and mechanical damage to the grain.The performance effects were measured with the system unloading corn and soybeans.

The data were statistically analyzed to check for interactions between the grains and differences between the timings.Using an alpha value of 0.1 it was found that timing 1 for both grains had a 3% (<2.4 L/s) higher flow rate over timings 2 and 3.Timings 1 and 2 for both grains had higher maximum startup torque, about 10% (60 N·m) more torque required than timing 3.In soybeans, timings 2 and 3 also had the smallest standard deviation in operating torque, about 30% (20 N·m) less than timing 1.We were unable to detect any differences in mechanical damage to corn or soybeans as a result of unloading auger timing.These findings suggest that timing 3, with the cross augers lagging 90° behind the vertical unloading auger, may require less maximum startup torque and less variation in torque for the cross augers to effectively fill the loosely filled space left after the vertical auger lifts the grain without extra torque effects of having the augers push against each other as they do in timing 1.

Advisor: Michael F. Kocher

Immunocontraception In Japanese Quail Using Mammalian Gnrh Compared To Chicken Gnrh-I And Chicken Gnrh-Ii, Marianna Burks

Open Access Master's Theses (through 2010)

Because of increasing numbers in wildlife, immunocontraceptives are being developed to decrease these animals and other birds. This study was conducted in conjunction with the United States Geological Survey Midcontinent Science Center in Fort Collins, Colorado (USGS), to determine whether mammalian GnRH (m-GnRH) can be used as a potential immunocontraceptive to decrease reproductive fertility in mature Japanese quail.

Eighty male and female Japanese quail were injected with either mGnRH, chicken GnRH-I (c-GnRH-I), chicken GnRH-II (c-GnRH-II), or vehicle (controls). Blood samples were analyzed for estrogen (E2) and testosterone (T) levels, in addition to antibody titer (Aby) development against the corresponding conjugated …

Review Of Parasites And The Behaviour Of Animals By Janice Moore (Oxford University Press, 2002), Daniel R. Brooks

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Review of Parasites and the Behaviour of Animals by Janice Moore (Oxford University Press, 2002).

The Birds Of St. Matthew Island, Bering Sea, Kevin Winker, Daniel D. Gibson, Arthur L. Sowls, Brian E. Lawhead, Philip D. Martin, Eric P. Hoberg, Douglas Causey

Harold W. Manter Laboratory of Parasitology: Faculty Publications

St. Matthew Island (608 249 N, 1728 429 W) and its small nearby satellites, Hall Island and Pinnacle Rock, are isolated in the north-central Bering Sea. This infrequently visited location occupies a geographic position with a deep Bering Land Bridge history and is in an area of interdigitation of the Old World, New World, and Beringian avifaunas. It is known for its three Beringian endemics, a bird (McKay’s Bunting, Plectrophenax hyperboreus), a small mammal, and a plant. This level of endemism is striking for a high-latitude island. The only previous summary of the avifauna of St. Matthew Island (Hanna …

Perpetrators Of Early Physical And Sexual Abuse Among Homeless And Runaway Adolescents, Kimberly A. Tyler, Ana Mari Cauce

Department of Sociology: Faculty Publications

Objective: To examine abuse specific variables among homeless and runaway adolescents and to look at perpetrators of childhood abuse.
Method: A total of 372 homeless and runaway adolescents were interviewed using a systematic sam¬pling strategy in metropolitan Seattle. Young people were interviewed on the streets and in shelters by outreach workers in youth service agencies.
Results: Approximately one-half of these young people reported being physically abused and al¬most one-third experienced sexual abuse. Females experienced significantly higher rates of sex¬ual abuse compared to males, and sexual minority youth experienced significantly higher rates of physical and sexual abuse compared to …

Revision Of The Neotropical Genus Trizogeniates Ohaus (Coleoptera: Scarabaeidae: Rutelinae: Geniatini), Karla Villatoro

University of Nebraska State Museum: Entomology Papers

A comprehensive, systematic treatment of the poorly studied Neotropical genus Trizogeniates (Coleoptera: Scarabaeidae: Rutelinae: Geniatini) is provided. This revision includes a key to species, species descriptions, and distributional and temporal data. Based on this study, the genus Trizogeniates now includes 30 species. The following eight species are new: Trizogeniates ohausi Villatoro, T. venezuelensis Villatoro, T. geminatus Villatoro, T. caiporae Villatoro, T. crispospinatus Villatoro, T. catsus Villatoro, T. aphilus Villatoro, and T. eris Villatoro. Trizogeniates zischkai Martínez is a new synonym of T. temporalis Ohaus; T. grandis Ohaus is a new synonym of T. cribicollis (Lucas). T. andicola Ohaus is a …

Mexican Lepidoptera Biodiversity, J. B. Heppner

Insecta Mundi

Being among the most habitat diverse countries in the world (and plant diversity is about 22,000 sp.), Mexico has a Lepidoptera fauna recorded at about 14,385 species but is estimated to be over 22,000 species, if not much higher (some estimates go to 35,000 sp.). High Lepidoptera numbers in Mexico are also due to the large influx of tropical species from the border with Guatemala, as well as Mexican endemics. In this report, the Lepidoptera families are summarized for Mexico, giving known species and what experts estimate to be the true total for each family when all have been described. …

Review Of Noterapion Kissinger From Chile And Argentina (Coleoptera: Apionidae), David G. Kissinger

Insecta Mundi

Descriptions and a key are provided for 7 South American species of Noterapion Kissinger (2002) (type species Apion meorrhynchum, Philippi and Philippi) including N. bruchi (Beguin-Billecocq), N. meorrhynchum (Philippi and Philippi), N. philippianum (Alonso-Zarazaga) and four new species described from Chile: N. chilense Kissinger, N. kuscheli Kissinger, N. nothofagi Kissinger, and N. saperion Kissinger. A lectotype designation is published for Apion meorrhynchum Philippi and Philippi and Apion vestitum Philippi and Philippi. Apion fuegianum Enderlein and A. pingue Beguin-Billecocq are synonymized with N. meorrhynchum (Philippi and Philippi), new synonymy.

Noterapionini (new tribe) is erected for Noterapion Kissinger (type genus) within …

The Prairie Naturalist Volume 34, No. 3/4 September/December 2002

The Prairie Naturalist

SEASONAL FOOD HABITS OF COYOTES IN NORTHEASTERN KANSAS ▪ J. F. Kamler, P. S. Gipson, and C. C. Perchellet

SELECTION OF NESTING HABITAT BY SHARP-TAILED GROUSE IN THE NEBRASKA SANDHILLS ▪ B. L. Prose, B. S. Cade, and D. Hein

PATTERNS OF REPRODUCTION FOR WESTERN HARVEST MICE IN NORTH-CENTRAL KANSAS ▪ J. R. Goheen, G. A. Kaufman, and D. W. Kaufman

THE IMPACT OF RECREATIONAL TRAILS AND GRAZING ON SMALL MAMMALS IN THE COLORADO PIEDMONT ▪ C. A. Meaney, A. K. Ruggles, N. W. Clippinger, and B. C. Lubow

CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA 2001 ▪ R. N. Randall …

Review Of Parasitism: The Diversity And Ecology Of Animal Parasites By Albert O. Bush, Jacqueline C. Fernández, Gerald W. Esch And J. Richard Seed (Cambridge University, 2002), Daniel R. Brooks

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Review of Parasitism: The Diversity and Ecology of Animal Parasites by Albert O. Bush, Jacqueline C. Fernández, Gerald W. Esch and J. Richard Seed (Cambridge University, 2002).

Ashworthius Patriciapilittae N. Sp. (Trichostrongyloidea: Haemonchinae), An Abosomal Nematode In Odocoileus Virginianus From Costa Rica, And A New Record For The Species Of The Genus In The Western Hemisphere, Eric P. Hoberg, Arthur Abrams, Ramon A. Carreno, J. Ralph Lichtenfels

Harold W. Manter Laboratory of Parasitology: Faculty Publications

A species of Ashworthius is reported for the first time in the Western Hemisphere, and A. patriciapilittae n. sp. is described on the basis of specimens in white-tailed deer Odocoileus virginianus from Costa Rica. Among 8 known species, A. patriciapilittae is morphologically similar to A. tuyenquangi in red muntjac Muntjacus muntjak from northern Vietnam. The synlophe in A. patriciapilittae is composed of 26 ridges in the cervical zone and is continuous to the caudal extremity in males and females. Males are characterized by a complex dorsal ray and narrow trifurcate spicules (351-356 mm long) lacking an ‘‘eyelet,’’ with dissimilar ventral …

Description Of Paranoplocephala Etholeni N. Sp. (Cestoda: Anoplocephalidae) In The Meadow Vole Microtus Pennsylvanicus, With A Synopsis Of Paranoplocehala S. L. In Holarctic Rodents, Voitto Haukisalmi, H. Henttonen, J. Niemimaa, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Paranoplocephala etholeni n. sp, parasitizing the meadow vole Microtus pennsylvanicus in Alaska and Wisconsin, USA. is described Paranaplocephala etholeni is morphologically most closely related to the Nearctic Paranoplocephala ondatrae (Rausch, 1948). Available data suggest that P. etholeni is a host-specific, locally rare species that may have a wide but sporadic geographical distribution in North America. The finding of P. ondatrae-like cestodes in Microtus spp. suggests that this poorly known species may actually be a parasite of voles rather than muskrat (type host). A tabular synopsis of all the known species of Paranoplocephala s. I. in the Holarctic region with …

A Review Of Poanes Hobomok (Hesperiidae: Hesperiinae), With The Description Of A New Subspecies From The Southern Appalachians, Ronald R. Gatrelle

The Taxonomic Report of the International Lepidoptera Survey

Poanes hobomok monofacies is described from the southern limits of the Appalachian Mountains in western North Carolina, northern Georgia and eastern Tennessee, United States. The type locality is Chestnut Mountain, 3,400’, Macon County, North Carolina, United States. This new subspecies is characterized by the similarity of males and females and overall much darker and subdued marking when compared to both P. h. hobomok (eastern to mid-, northern United States and eastern to mid-, southern Canada) and P. h. wetona (Colorado and New Mexico, United States). The northern and western range of this new taxon and the …

Homophobia And Academic Freedom, David Moshman

Department of Educational Psychology: Faculty Publications

Addressing homophobia and heterosexism as a teacher raises issues of respect for the intellectual freedom of your students. The central thesis of this article is that these issues are best addressed on the basis of general principles of academic freedom-that is, intellectual freedom in educational and research contexts. Three cases are analyzed on the basis of principles developed by the Academic Freedom Coalition of Nebraska (AFCON). These principles permit advocacy, rather than requiring neutrality, but do not permit indoctrination. That is, instructors may express and justify their own ideas relevant to the curriculum and try to convince students to adopt …

The Natural History Of Reproduction In Solanum And Lycianthes (Solanaceae) In A Subtropical Moist Forest, Stacey Dewitt Smith, Sandra Knapp

School of Biological Sciences: Faculty Publications

The phenology and pollination of seven understory species of buzz-pollinated Solanaceae (Solanum erythrotrichum, S. lanceifolium, S. rudepannum, S. cordovense, S. nudum, Lycianthes hypoleuca and L. gorgonea) were investigated at the end of the dry season in the subtropical moist forest at the Las Cuevas Research Station, Chiquibul Forest Reserve, Cayo District, western Belize. Three phenological phenomena were tracked: the opening and closing of flowers, flower production and fruit production. The large short-lived white flowers of S. lanceifolium, S. rudepannum, Lycianthes hypoleuca and L. gorgonea opened around sunrise and closed at sunset. The purple flowers of S. erythrotrichum and …

Molecular Identification Of Natural Hybrids Between Trichinella Nativa And Trichinella T6 Provides Evidence Of Gene Flow And Ongoing Genetic Divergence, G. La Rosa, G. Marucci, D.S. Zarlenga, A. Casulli, R.L. Zarnke, E. Pozio

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

To date, there are no data available on the population genetics of Trichinella due to the lack of genetic markers and the difficulty of working with such small parasites. In the Arctic region of North America and along the Rocky Mountains, there exist two genotypes of Trichinella, Trichinella nativa and Trichinella T6, respectively, which are well differentiated by biochemical and molecular characters. However, both are resistant to freezing, show other common biological characters (e.g. low or no infectivity to rodents and swine) and produce fertile F1 offspring upon interbreeding. To data, these two genotypes have been considered allopatric. In this …

Developments In Relativistic Nonlinear Optics, Donald P. Umstadter, Sudeep Banerjee, Shouyuan Chen, E. Dodd, K. Flippo, Anatoly Maksimchuk, N. Saleh, A. Valenzuela, P. Zhang

Donald Umstadter Publications

We report recent results of experiments and simulations in the regime of peak laser intensities above 10¹⁹ W/cm², including the following topics: (1) electron and proton acceleration to energies in excess of 10 MeV in well collimated beams; (2) use of laser chirp to control the growth of plasma waves and acceleration of electrons by the Raman instability; (3) all optical injection and acceleration of electrons; (4) relativistic self-focusing by means of the mutual index of refraction of two overlapping laser pulses; (5) creation of a radioisotope by the reaction ¹⁰B(d,n)¹¹C; (6) …

New World Screwworm Synthetic Sex Stimulant, David A. Carlson, Dennis Berkebile, Steven R. Skoda, Kenji Mori

Department of Entomology: Faculty Publications

The presence of a sex pheromone in (New World Screwworm) females was demonstrated some time ago, but no natural compounds were isolated for proof of activity, and no synthetic compounds were ever tested. We report biological activity as powerful aphrodisiacs for synthetics in declining order of compounds 1, 4, 3, 2 and 5. Two types of bioassays were conducted to compare the stimulatory activity of these compounds against mature virgin males. Four compounds were the acetates of secondary alcohols with 29 carbon backbones, each with a variably-positioned methyl branch near the opposite end of the chain and one was a …

Langmuir-Blodgett Films Of Polyethylene, A.V. Sorokin, Mengjun Bai, Stephen Ducharme, Matt Poulsen

Stephen Ducharme Publications

The possibility to obtain surface layers on water and prepare solid multilayer Langmuir–Blodgett films of medium-density polyethylene is shown. The polymer film on water is stable, demonstrates a reversible surface pressure-area isotherm up to 15 mN/m, and can be deposited onto a substrate using the Langmuir–Blodgett technique in a wide range of surface pressures. The thickness of a single deposited layer is 5.1 nm on average. The dielectric and optical constants of multilayer films are near their bulk values. The films exhibit high dielectric strength of at least 200 MV/m.

Cropwatch No. 2002-26, Nov. 15, 2002, Lisa Brown Jasa

Crop Watch (1994–2005)

Inside

Aurora Ag Day………..238

Nebraska No-Till………..238

Soybean profitability………..238

Technology update………..238

Manure use workshop………..238

Soybean seed treatments………..240

Variety selection tips………..240

Plant problems in 2002………..241

Drought lingers………..241

Crop Protection Clinics………..242

Corn/Soybean Workshops………..242

Rural income options………..243

Agronomy Highlights………..244

Returning to the Farm………..244

ICM winter meetings………..245

Subscription form for 2003………..246

A Socioeconomic And Biological Evaluation Of Current And Hypothetical Crappie Regulations In Sardis Lake, Mississippi: An Integrated Approach, Brian Dorr, Ian A. Munn, Keith O. Meals

United States Department of Agriculture Wildlife Services: Staff Publications

We conducted a socioeconomic survey and review of existing biological data in an integrated evaluation of current and hypothetical fishery regulations on crappies Pomoxis spp. in Sardis Lake, Mississippi. The objectives of this study were to (1) assess angler acceptance of current and hypothetical harvest restrictions, (2) determine the recreational value of the crappie fishery to its participants, (3) estimate possible changes in recreational value based on angler responses to hypothetical regulations, and (4) integrate the results of the socioeconomic surveys with existing biological information. Using the travel cost method, we estimated mean expenditures at US$29.48 and average consumer surplus …

Field Evaluation Of Flight ControlTm To Reduce Blackbird Damage To Newly Planted Rice, John L. Cummings, Michael L. Avery, Owen Mathre, E. Allen Wilson, Darryl L. York, Richard M. Engeman, Patricia A. Pochop, James E. Davis Jr.

United States Department of Agriculture Wildlife Services: Staff Publications

An effective, economic, and environmentally safe bird repellent is needed to reduce blackbird (Icterinae) depredations to newly planted rice. We evaluated Flight Control^TM, a 50% anthraquinone product, as a seed treatment for newly planted rice. We treated rice seed with Flight Control at a 2% (g/g) concentration (1% active anthraquinone) the day of planting. This concentration reduced the number of blackbirds (P=0.0003) using treated fields and blackbird damage to rice seed (P=0.0124). The chemical concentration of anthraquinone on rice seed averaged 0.79% (SE=0.06%) at planting; 0.39% (SE= 0.04%) at day I, 0.34% (SE=0.05%) at …

The Structure And Evolution Of The Major Capsid Protein Of A Large, Lipid-Containing Dna Virus, Narayanasamy Nandhagopal, Alan Simpson, James Gurnon, Xiadong Yan, Timothy Baker, Michael V. Graves, James L. Van Etten, Michael Rossman

Nebraska Center for Virology: Faculty Publications

Paramecium bursaria Chlorella virus type 1 (PBCV-1) is a very large, icosahedral virus containing an internal membrane enclosed within a glycoprotein coat consisting of pseudohexagonal arrays of trimeric capsomers. Each capsomer is composed of three molecules of the major capsid protein, Vp54, the 2.0-Å resolution structure of which is reported here. Four N-linked and two O-linked glycosylation sites were identified. The N-linked sites are associated with nonstandard amino acid motifs as a result of glycosylation by virus-encoded enzymes. Each monomer of the trimeric structure consists of two eight-stranded, antiparallel β-barrel, “jelly-roll” domains related by a pseudo-sixfold rotation. The fold of …

To Be Or Not To Be Another: Multiracial Or Mixed Race , Cecile Ann Lawrence

Different Perspectives on Majority Rules: 7th Annual National Conference (2002)

This session will explore recent conversations about developing an expanded view of identity in the U.S. The focus would be on the status of "multiracial" or "mixed race." This would also include discussion on how these categories would affect affirmative action and diversity initiatives in the context of higher education.

Corporate Sponsorship Of Programs To Recruit And Retain Students Of Color: The Cigna Scholars At The University Of Richmond, Akiba J. Covitz Ph.D.

Different Perspectives on Majority Rules: 7th Annual National Conference (2002)

The University of Richmond, an institution with an under-represented minority student population, and the CIGNA Corporation created the CIGNA Scholars Program to recruit and retain students of color. This program, from inception to current activity, will be discussed in order to facilitate the creation of such programs at other institutions.

Sola Scarab Workers Symposium 2002, Andrew Smith

University of Nebraska State Museum: Programs Information

Entomological Society of America Annual Meeting
Fort Lauderdale, Florida
Sunday, 17 November 2002

SPEAKERS:
Introduction. Andrew Smith, University of Nebraska- Lincoln
Megadiversity upon megadiversity: mites and the Scarabaeoidea. Barry OConnor, University of Michigan
Revision, phylogeny, and biogeography of the dung beetle tribe Eucraniini, and evolution of its food relocation behavior: a total evidence analysis. Federico Ocampo, University of Nebraska-Lincoln
Launching the Scarabaeinae Research Network. Sacha Spector, American Museum of Natural History
Rockin' and rolling: evolutionary patterns in the sacred scarab and its kin. Keith Philips, Western Kentucky University
The New World Gymnetini (Cetoniinae): an overview of classification and biology. Brett …

Cropwatch No. 2002-25, Nov. 1 ,2002, Lisa Brown Jasa

Crop Watch (1994–2005)

Inside

Management tips…………..230

New publications …………..230

Harvest update…………..230

Farm bill satellite conference …………..231

Crop insurance workshop…………..231

Pesticide regulation changes/training ops…………..232

Research symposium…………..233

Water quality project…………..234

Weed science conference…………..234

Soybean Expo…………..234

Ag cooperatives…………..235

Agronomy classes…………..235

No-till yield results…………..236

ICM December meeting…………..236

Brief Communications: Rapid And Costly Ageing In Wild Male Flies, Russell Bonduriansky, Chad Brassil

School of Biological Sciences: Faculty Publications

Ageing (senescence) has never been demonstrated convincingly in any insect in the wild, where mean life-spans are probably much shorter than in the laboratory¹, and most evidence for senescence in other wild animals (such as mammals) is limited to their reduced survival with age². Here we show that ageing is detectable in wild populations of a very short-lived insect, the antler fly (Protopiophila litigata), and causes debilitating and costly effects that force a decline not only in survival probability, but also in the reproductive rate of males. Our findings argue against the possibility of …

Mineralization Of Manure Nutrients, Bahman Eghball, Brian J. Wienhold, John E. Gilley, Roger A. Eigenberg

Department of Agricultural and Biological Systems Engineering: Faculty Publications

In order to apply manure or compost to fulfill the nutrient requirements of a crop, knowledge of the amount of nutrients mineralized following application is needed. Nutrient mineralization from applied manure depends on temperature, soil moisture, soil properties, manure characteristics, and microbial activity. Since these factors cannot be accurately predicted, nutrient mineralization from applied manure can only be approximated. Nitrogen (N) availability from applied manure includes the inorganic N (NO₃-N and NH₄-N) in manure plus the amount of organic N mineralized following application. Nitrogen mineralization differs for different manure types since the inorganic/organic fraction and quality …

Handbook Of Plant And Crop Physiology, Second Edition, Revised And Expanded, Wally Wilhelm

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

This book, as the title states, is an updated and expanded edition of a 1995 book with a similar title and the same editor. The first thing that may strike the reader of the Handbook is the physical size of this volume. Although the second edition is a few pages shorter than the original (973 vs. 1003 pages), the print size was reduced in this revised edition allowing the expanded text to be presented in a similar number of pages. In revising the book, the editor and authors have rearranged the sections, updated almost all chapters, and added chapters on …