Digital Commons Network^™

The Consequences And Correlates Of Racial Identity Discordance: An Explication Of The Social Construction Of Race, Eli X. Ornelas

Department of Sociology: Dissertations, Theses, and Student Research

The current study analyzes the rates at which different racial groups experience identity discordance, or the phenomenon of one’s self-ascribed racial identity not being commensurate with external perceptions of one’s race. While previous research has documented the possibility of discrepancy between self-ascribed and external classifications of racial identities, few empirical studies have sought to determine which racial groups are most susceptible to experiencing identity discordance or investigated specific mechanisms that may contribute to that discordance. Utilizing the 2006 wave of the Portraits of American Life Study (PALS), the current study investigates the rate of identity discordance for Whites, Blacks, Hispanics, …

Optimal Allocation Of Two Resources In Annual Plants, David Mcmorris

Department of Mathematics: Dissertations, Theses, and Student Research

The fitness of an annual plant can be thought of as how much fruit is produced by the end of its growing season. Under the assumption that annual plants grow to maximize fitness, we can use techniques from optimal control theory to understand this process. We introduce two models for resource allocation in annual plants which extend classical work by Iwasa and Roughgarden to a case where both carbohydrates and mineral nutrients are allocated to shoots, roots, and fruits in annual plants. In each case, we use optimal control theory to determine the optimal resource allocation strategy for the plant …

Professional Military Education In The Marine Corps Reserve: A Narrative Inquiry, Adam Fullerton, Deryl K. Hatch-Tocaimaza, Seth S. Synstelien, Aaron Meltzer

Department of Educational Administration: Faculty Publications

While there are numerous qualitative studies that explore civilian experiences in continuing professional education programs, there is a dearth of research on the professional military education (PME) system. These systems, which sustain continuing education and professional development for more than 2 million active and reserve members of the military, are navigated in a myriad of different ways, depending on the branch of service, active or reserve status, and ability to go to resident PME courses by using an online format. This study, using a narrative inquiry framework, explores the lived experience of seven reserve staff noncommissioned officers (SNCO) as they …

Past, Present And Future Of Irrigation On The U.S. Great Plains, Steve R. Evett, Paul D. Colaizzi, Freddie R. Lamm, Susan A. O'Shaughnessy, Derek M. Heeren, Thomas J. Trout, William L. Kranz, Xiaomao Lin

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Motivated by the need for sustainable water management and technology for next-generation crop production, the future of irrigation on the U.S. Great Plains was examined through the lenses of past changes in water supply, historical changes in irrigated area, and innovations in irrigation technology, management, and agronomy. We analyzed the history of irrigated agriculture through the 1900s to the present day. We focused particularly on the efficiency and water productivity of irrigation systems (application efficiency, crop water productivity, and irrigation water use productivity) as a connection between water resource management and agricultural production. Technology innovations have greatly increased the efficiency …

Soil-Nitrogen, Potentially Mineralizable-Nitrogen, And Field Condition Information Marginally Improves Corn Nitrogen Management, Jason Clark, Fabián G. Fernández, Kristen S. Veum, James J. Camberato, Paul R. Carter, Richard Ferguson, David W. Franzen, Daniel E. Kaiser, Newell R. Kitchen, Carrie A.M. Laboski, Emerson Nafziger, Carl J. Rosen, John E. Sawyer, John F. Shanahan

Department of Agronomy and Horticulture: Faculty Publications

Anaerobic potentially mineralizable nitrogen (PMN) combined with preplant nitrate test (PPNT) or pre-sidedress nitrate test (PSNT) may improve corn (Zea mays L.) N management. Forty-nine corn N response studies were conducted across the U.S. Midwest to evaluate the capacity of PPNT and PSNT to predict grain yield, N uptake, and economic optimal N rate (EONR) when adjusted by soil sampling depth, soil texture, temperature, PMN, and initial NH₄–N from PMN analysis. Pre-plant soil samples were obtained for PPNT (0- to 30-, 30- to 60-, 60- to 90-cm depths) and PMN (0- to 30-cm depth) before corn planting …

Resources For Teaching And Assessing The Vision And Change Biology Core Concepts, Janet L. Branchaw, Pamela A. Pape-Lindstrom, Kimberly D. Tanner, Sarah A. Bissonnette, Tawnya L. Cary, Brian A. Couch, Alison J. Crowe, Jenny K. Knight, Katharine Semsar, Julia I. Smith, Michelle K. Smith, Mindi M. Summers, Caroline J. Wienhold, Christian D. Wright, Sara E. Brownell

School of Biological Sciences: Faculty Publications

The Vision and Change report called for the biology community to mobilize around teaching the core concepts of biology. This essay describes a collection of resources developed by several different groups that can be used to respond to the report’s call to transform undergraduate education at both the individual course and departmental levels. First, we present two frameworks that help articulate the Vision and Change core concepts, the BioCore Guide and the Conceptual Elements (CE) Framework, which can be used in mapping the core concepts onto existing curricula and designing new curricula that teach the biology core concepts. Second, we …

Frontal Vehicle Illumination Via Rear-Facing Lighting Reduces Potential For Collisions With White-Tailed Deer, Travis L. Devault, Thomas W. Seamans, Bradley Blackwell

United States Department of Agriculture Wildlife Services: Staff Publications

nimal–vehicle collisions cause many millions of animal deaths each year worldwide and present a substantial safety risk to people. In the United States and Canada, deer (Odocoileus spp.) are involved in most animal–vehicle collisions associated with human injuries. We evaluated a vehicle-based collision mitigation method designed to decrease the likelihood of deer–vehicle collisions during low-light conditions, when most collisions occur. Specifically, we investigated whether the use of a rear-facing light, providing more complete frontal vehicle illumination than standard headlights alone, enhanced vehicle avoidance behaviors of white-tailed deer (O. virginianus). We quantified flight initiation distance (FID), the likelihood …

A Survey Of Dairy-Goat Keeping In Zanzibar, Tiffanie Stone, Charles A. Francis, L. O. Eik

Department of Agronomy and Horticulture: Faculty Publications

Dairy goats with improved genetics for milk production were recently introduced onto small-scale farms in Zanzibar through governmental and non-governmental projects. These projects were meant to support small-scale farmers by improving both income and household nutrition through milk production. No follow up had been conducted to understand what effects dairy goat keeping had on these small-scale farms, or how they could be improved. A survey of 193 dairy goat farmers in Zanzibar was conducted, including 30% and 60% of all dairy goat farmers on Unguja and Pemba, the two largest islands, respectively. The objective was to understand the impact keeping …

Bioinformatic Analysis Of The Gut Microbiota Derived From The Oil Fly Helaeomyia Petrolei From The La Brea Tar Pits, Brian A. Dillard

School of Biological Sciences: Dissertations, Theses, and Student Research

In the early 1930s, Thorpe a prominent entomologist, called for more research into Helaeomyia petrolei larva. These larvae live in the Californian La Brea tar pits where they are exposed to large amounts of polyaromatic hydrocarbons. Molecules like anthracene, phenanthrene, and toluene which should be highly toxic to both the oil fly larvae and its enteric bacteria. This extremophilic gut microbiome has yet to be studied using current day next gen sequencing and bioinformatic techniques. In fact, since Thorpe’s work in the 1930s, there have been only two publications characterizing the oil fly larvae. Both in the early 2000s by …

Optimum Mixing Design Of Xanthan And Gellan Treated Soils For Slope Stabilization For Weathered Shales And Glacial Tills In Nebraska, Layal Bitar

Department of Civil and Environmental Engineering: Dissertations, Theses, and Student Research

Verdigre located in North Eastern Nebraska experienced slope failures. The geological formations of theses slopes largely consist of several layers of weathered shales and glacial tills. It is believed that the weathering process reduced the shear strength of the soils leading to slope failures.

In this study, strength characteristics of Xanthan and Gellan gums treated soil specimens compacted at the optimum moisture content for field application were investigated so that the biopolymer treated soils may be properly used to stabilize the slopes. The untreated and treated samples were subjected to a wet-freeze(-6^oF)-thaw(167^oF)-dry weathering process up to …

Developing Alternatives To Protect Domestic Sheep From Predation In South Africa, David L. Bergman, Nico L. Avenant, Michael J. Bodenchuk, Eddie Steenkamp

United States Department of Agriculture Wildlife Services: Staff Publications

South Africa has approximately 8,000 commercial small livestock farms and 5,800 communal/subsistence farmers throughout the country. Reported rates of small livestock loss to predation range from 3-13% and 0.5-19% from communal farming areas. A range of predators exist on the African continent, but in southern Africa major livestock losses are primarily due to black-backed jackal and caracal. South Africans have been managing caracals and jackals for over 300 years with no elimination of predation. During the aforementioned time frame, producers have used and/or developed a number of techniques including lethal, nonlethal, and integrated predator damage management to address predation losses. …

First Records Of Ancognatha Aymara Mondaca, 2016 (Coleoptera: Scarabaeidae: Dynastinae: Cyclocephalini) In Argentina, José Mondaca

Insecta Mundi

Ancognatha aymara Mondaca, 2016 (Coleoptera: Scarabaeidae: Dynastinae: Cyclocephalini), a species previously known only from Chile, is recorded for the first time in northern Argentina. The new records are based on male specimens collected in the provinces of Jujuy and Salta. Illustrations of the habitus and male genitalia of the species are presented in color photographs. A map with its current distribution in Chile and Argentina is included.

The genus Ancognatha Erichson, 1847 (Coleoptera: Scarabaeidae: Dynastinae: Cyclocephalini) includes 23 valid species (Moore et al. 2018a, b; Paucar-Cabrera and Ratcliffe 2018) distributed from Arizona and New Mexico in the United States to …

First Association Of Scale Insects (Hemiptera: Diaspididae) With Salacia Crassifolia (Mart. Ex Schult.) G. Don. (Celastraceae), Marcelo Tavares De Castro, Sandro Coelho Linhares Montalvão, Vera R. S. Wolff, Rose Gomes Monnerat

Insecta Mundi

Salacia crassifolia (Mart. ex Schult.) G.Don., (Celastraceae) is a native species of shrub/tree highly ap­preciated in Brazil for its fruits and medicinal properties. Scale insects have never been reported associated with S. crassifolia; nevertheless, this paper describes the occurrence of two diaspidids on S. crassifolia leaves in Brazil. Three mature trees were inspected in February and March 2018 and scale insect samples were collected and pre­served in 70% alcohol, then mounted and identified under an optical microscope. Two species of scale insects were found associated with this plant, Pseudoparlatoria argentata Hempel and Melanaspis aristotelesi Lepage and Gi­annotti, both from …

Two New Species Of Nothochodaeus Nikolajev, 2005 From The Himalayan Region (Coleoptera: Scarabaeoidea: Ochodaeidae), Jean-Bernard Huchet

Insecta Mundi

Nothochodaeus yeti Huchet, new species, from Nepal and Sikkim (north India) and N. martensi Huchet, new species, from Nepal, are described and illustrated (Coleoptera: Scarabaeoidea: Ochodaeidae). A distribution map and an updated catalogue of the Ochodaeidae occurring on the Indian subcontinent are provided.

Over the last two decades, oriental beetles belonging to the Ochodaeidae, particularly those occupying East and Southeast Asia, have been the topic of extensive taxonomic studies including the description of many new species (Nikolajev 2005, 2009; Ochi et al. 2011, 2013; Masumoto et al. 2013, 2018; Huchet 2014a, b, 2017, 2018, 2019; Paulsen 2014; Huchet …

Subsequent Spelling Cavolinii For Scarabaeus Cavolini Petagna, 1792 (Currently Copris Hispanus Cavolinii) To Be Maintained As Prevailing Usage (Coleoptera: Scarabaeoidea: Scarabaeidae: Coprini), Stefano Ziani

Insecta Mundi

The specific name in Scarabaeus cavolinii Petagna, 1792 (currently Copris hispanus ssp. cavolinii) (Coleoptera: Scarabaeidae: Coprini) is an incorrect subsequent spelling—the original spelling is cavolini—but, because of its prevailing usage here documented, is to be preserved.

In 1792, Petagna described Scarabaeus cavolini (Coleoptera: Scarabaeidae) as a tribute to the famous Italian biologist Filippo Cavolini (1756–1810), whose Latinized name was Philippus Cavolinus (Petagna 1785; Smith 1804). To dedicate the new species to him, Petagna (1792) declined the name to the genitive singular case of the second Latin declension, which is Cavolini.

The original spelling “cavolini” was …

Identification Of Planthoppers (Hemiptera: Delphacidae) Intercepted On Aquarium Plants In Florida And Elucidation Of A Potential Pathway For Exotic Aquatic And Semiaquatic Pests, Susan E. Halbert, Matthew R. Moore, Charles R. Bartlett, Jade S. Allen

Insecta Mundi

Recent shipments of aquarium plants to pet stores in five Florida counties were found to be infested with an exotic delphacid planthopper. Rearing adult males allowed identification by morphological analysis. Molecular analysis confirmed that it was the same as authoritatively identified reference specimens of the planthopper, Opiconsiva anacharsis (Fennah) (new combination) (Hemiptera: Delphacidae), first reported from Florida in 1989 and known to be established only in Broward County. The host plants, Echinodorus spp. Rich. ex Engelm. (Alismatales: Alismataceae), originally from Thailand, were sold in enclosed plastic cylinders that provided a suitable environment for maintaining the planthoppers. Attempts to trace the …

A New Species Of Pteroplatus Buquet, 1840 (Coleoptera: Cerambycidae) And Taxonomical Notes In Neotropical Cerambycidae, Antonio Santos-Silva, Juan Pablo Botero

Insecta Mundi

Pteroplatus antonkozlovi Santos-Silva and Botero, sp. nov. (Coleoptera: Cerambycidae) is described from Panama. Neocompsa thelgema Martins, 1971 is recorded from Panama, and chromatic variation is discussed. The female of Icimauna aysa Martins and Galileo, 1991 is described. Some corrections in a recently published work on Acanthoderini are provided, and the combination Scythropopsis pupillata (Bates, 1880) is established as having precedence over the simultaneously published combination Aegomorphus pupillatus (Bates, 1880).

Recently, we received a relatively large number of specimens of Cerambycidae from Panama, collected by Anton O. Kozlov and Yuliya Kovaleva (Russia) in 2018 and 2019. Among these specimens we found …

Effects Of Pyric Herbivory On Prairie-Chicken (Tympanuchus Spp) Habitat, Heath D. Starns, Samuel D. Fuhlendorf, Robert D. Elmore, Dirac Twidwell, Eric T. Thacker, Torre J. Hovick, Barney Luttbeg

Department of Agronomy and Horticulture: Faculty Publications

The reduction and simplification of grasslands has led to the decline of numerous species of grassland fauna, particularly grassland-obligate birds. Prairie-chickens (Tympanuchus spp.) are an example of obligate grassland birds that have declined throughout most of their distribution and are species of conservation concern. Pyric herbivory has been suggested as a land management strategy for enhancing prairie-chicken habitat and stabilizing declining population trends. We assessed differences in vegetation structure created by pyric herbivory compared to fire-only treatments to determine whether pyric herbivory increased habitat heterogeneity for prairie-chickens, spatially or temporally. Our study was performed at four sites in the southern …

Psychological And Neurobiological Mechanisms Underlying The Decline Of Maternal Behavior, Ming Li

Department of Psychology: Faculty Publications

The maternal behavior decline is important for the normal development of the young and the wellbeing of the mother. This paper reviews limited research on the factors and mechanisms involved in the rat maternal behavior decline and proposes a multi-level model. Framed in the parent-offspring conflict theory (an ultimate cause) and the approach-withdrawal model (a proximate cause), the maternal behavior decline is viewed as an active and effortful process, reflecting the dynamic interplay between the mother and her offspring. It is instigated by the waning of maternal motivation, coupled with the increased maternal aversion by the mother in responding to …

Vegetation And Large Carnivore Responses In An Encroached Landscape, Hugh Ellerman

School of Natural Resources: Dissertations, Theses, and Student Research

The Great Plains biome supports biodiverse plant and animal communities, provides a wide array of ecosystem services, and is depended upon by agricultural economies. Despite these advantages, however, Great Plains grasslands are becoming increasingly degraded by landcover changes due to agriculture and urbanization, fragmentation, loss of biodiversity and invasion by woody species. Woody encroachment is a biome-wide threat to Great Plains plant and wildlife communities and is therefore managed, though with variable success. I investigated the efficacy of invasive tree management projects in restoring tallgrass prairies in southeast Nebraska and regenerating oak gallery forests along the Niobrara River. I measured …

Soil Chemical Properties After 12 Years Of Tillage And Crop Rotation, Maysoon M. Mikha, Gary Hergert, Xin Qiao, Bijesh Maharjan

Panhandle Research and Extension Center

Crop rotation in combinationwith tillage can improve productivity, enhance economical return, and reduce soil erosion. The objective of this study was to evaluate the impact of moldboard plow (MP), strip tillage (ST), no-tillage (NT), and crop rotations on: (1) crop yield; (2) soil chemical properties; and (3) particulate organic matter (POM). The study was initiated in 2007 at the University of Nebraska-Lincoln Panhandle Research and Extension Center near Scottsbluff, NE. Crops in rotation were corn (C; Zea mays L.) and dry bean (DB; Phaseolus vulgaris L.) organized in a 3-yr rotation (C–DB–C) and a 4-yr rotation with the addition of …

Retention Of Swine Slurry Constituents In Soil And Crop Residue As Affected By Setback Distance, John E. Gilley, Shannon L. Bartelt-Hunt, Kent M. Eskridge, Xu Li, Amy M. Schmidt, Daniel D. Snow

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Setbacks are prescribed distances from surface waters within which manure application is not allowed. Little information is available concerning the retention of swine slurry constituents in soil and crop residue materials within setback areas. This study was conducted to measure the retention of selected constituents within a setback area following the upslope application of swine slurry and the introduction of simulated rainfall. The no-till cropland site had a slope gradient of 4.9% and a mean winter wheat residue cover of 7.73 Mg ha−1 . Soil and vegetative samples were collected on 3.7 m wide by 23.2 m long plots with …

Vertebrates On The Brink As Indicators Of Biological Annihilation And The Sixth Mass Extinction, Gerardo Ceballos, Paul R. Ehrlich, Peter H. Raven

Harold W. Manter Laboratory of Parasitology: Library Materials

The ongoing sixth mass species extinction is the result of the destruction of component populations leading to eventual extirpation of entire species. Populations and species extinctions have severe implications for society through the degradation of ecosystem services. Here we assess the extinction crisis from a different perspective. We examine 29,400 species of terrestrial vertebrates, and determine which are on the brink of extinction because they have fewer than 1,000 individuals. There are 515 species on the brink (1.7% of the evaluated vertebrates). Around 94% of the populations of 77 mammal and bird species on the brink have been lost in …

Perspective: Ferromagnetic Liquids, Robert Streubel, Xubo Liu, Xuefei Wu, Thomas P. Russell

Department of Physics and Astronomy: Faculty Publications

Mechanical jamming of nanoparticles at liquid–liquid interfaces has evolved into a versatile approach to structure liquids with solid-state properties. Ferromagnetic liquids obtain their physical and magnetic properties, including a remanent magnetization that distinguishes them from ferrofluids, from the jamming of magnetic nanoparticles assembled at the interface between two distinct liquids to minimize surface tension. This perspective provides an overview of recent progress and discusses future directions, challenges and potential applications of jamming magnetic nanoparticles with regard to 3D nano-magnetism. We address the formation and characterization of curved magnetic geometries, and spin frustration between dipole-coupled nanostructures, and advance our understanding of …

Lstm-Based Anomaly Detection For Non-Linear Dynamical System, Yue Tan, Chungjing Hu, Kuan Zhang, Kan Zeng, Ethan A. Davis, Jae Sung Park

Department of Mechanical and Materials Engineering: Faculty Publications

Anomaly detection for non-linear dynamical system plays an important role in ensuring the system stability. However, it is usually complex and has to be solved by large-scale simulation which requires extensive computing resources. In this paper, we propose a novel anomaly detection scheme in non-linear dynamical system based on Long Short-Term Memory (LSTM) to capture complex temporal changes of the time sequence and make multi-step predictions. Specifically, we first present the framework of LSTM-based anomaly detection in non-linear dynamical system, including data preprocessing, multi-step prediction and anomaly detection. According to the prediction requirement, two types of training modes are explored …

Learning Acoustic Word Embeddings With Dynamic Time Warping Triplet Networks, Denis Shitov, Elena Pirogova, Tadeusz A. Wysocki, Margaret Lech

Department of Electrical and Computer Engineering: Faculty Publications

In the last years, acoustic word embeddings (AWEs) have gained significant interest in the research community. It applies specifically to the application of acoustic embeddings in the Query-by Example Spoken Term Detection (QbE-STD) search and related word discrimination tasks. It has been shown that AWEs learned for the word or phone classification in one or several languages can outperform approaches that use dynamic time warping (DTW). In this paper, a new method of learning AWEs in the DTW framework is proposed. It employs a multitask triplet neural network to generate the AWEs. The triplet network learns acoustic representations of words …

Biomedcentral (Bmc) 2019 – 2020, Anqi Shi, Heather Morrison

Copyright, Fair Use, Scholarly Communication, etc.

Key points

• Open access commercial publishing pioneer BMC is now wholly owned by a private company with a portfolio including lines of business that derive revenue from journal subscriptions, book sales, and textbook sales and rentals
• Two former BMC fully OA journals, listed in DOAJ from 2014 – 2018 as having CC-BY licenses, are now hybrid and listed on the Springer website and have disappeared from the BMC website
• 67% of BMC journals with APCs in 2019 and 2020 increased in price and 11% decreased in price.
• Journals with price increases had a higher average APC in 2019, i.e. more …

Improving Microbiological Safety Of Low Moisture Food Products Using Radio Frequency And Ethylene Oxide, Long Chen

Department of Agricultural and Biological Systems Engineering: Dissertations, Theses, and Student Research

Recent foodborne illness outbreaks in US associated with consumption of low-moisture foods (LMF) have heightened concerns of their microbial safety. Salmonella is a pathogen of major concern in LMF due to its ability to persist in low water activity (a_w) environments. The disadvantages of existing decontamination technologies for LMF call for novel and efficient intervention technologies. Radio frequency (RF) and ethylene oxide (EtO) were evaluated in this dissertation for improving microbial food safety and quality of LMF. Cumin seeds and inshell hazelnuts were selected as model foods.

It took < 2 min of stationary RF heating to achieve > 5 log reductions of Salmonella in cumin seeds without …

Documentando Y Conservando Las Colecciones Plumarias Del Museo Etnográfico Juan B. Ambrosetti; Facultad De Filosofía Y Letras, Universidad De Buenos Aires, Silvana Di Lorenzo, Silvia Manuale

PreColumbian Textile Conference VIII / Jornadas de Textiles PreColombinos VIII (2019)

Los pueblos originarios de la región sur de América hicieron y hacen uso de las plumas de aves locales para la elaboración de indumentaria y artefactos rituales, a través de complejas manufacturas que combinan conocimiento de técnicas textil y plumaria. En este trabajo presentamos la problemática de conservación y documentación de las colecciones plumarias del Gran Chaco, actualmente conservadas en el Museo Etnográfico Juan Bautista Ambrosetti, señalando la importancia del registro gráfico y fotográfico, herramientas metodológicas fundamentales para la documentación y la conservación de colecciones etnográficas.

The indigenous peoples of the South American region made and make use of the …

Nebline, June/July 2020

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Top 5 Ag Topics From 5 Years

7 Tips for Successfully Baking as a Family

Recipe of the Month

Timing Your Fruit Harvesting Apples, Pears & Plums

Paper Wasps and Yellow Jackets

Severe Weather Preparedness and COVID-19

Time to Look for Bagworms

Garden Guide: What to Do This Month

5 Tips for Working Remotely from Home and Caring for Children During COVID-19

HEART OF 4-H VOLUNTEER AWARD: Grace Kim

HEART OF 4-H VOLUNTEER AWARD: Greater Lincoln Obedience Club

4-H/FFA Livestock Booster Club Scholarships Due July 6

Video Companion Animal (and Cat and Pet Rabbit) Showmanship Entries Due Aug. 10

Horse …