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Center For Grassland Studies, September 2021

Center for Grassland Studies: Newsletters

Contents

Nebraska Grazing Conference Recap by Daren Redfearn

Center for Grassland Studies Policy Advisory Committee

Director's Column by Walt Schacht (Interim Director)

Land Use and Property Taxes by Jordan Johnson

Congratulations August 2021 Graduates

Wildfires are Changing the Future of Nebraska’s Woodland-Grassland Complexes by Amanda Hefner

PGA WORKS Scholarship Recipients Announced by PGA Reach

Grazing Livestock Systems Internships Provide Diverse Experience by Bryan Reiling

Jim Choquette Receives Lifetime Achievement Award

Dimension- And Context-Specific Expression Of Preschoolers’ Disruptive Behaviors Associated With Prenatal Tobacco Exposure, Suena H. Massey, Caron A.C. Clark, Michael Y. Sun, James L. Burns, Daniel K. Mroczek, Kimberly A. Espy, Lauren S. Wakschlag

Department of Psychology: Faculty Publications

Objective—Precise phenotypic characterization of prenatal tobacco exposure (PTE) −related disruptive behavior (DB) that integrates nuanced measures of both exposures and outcomes is optimal for elucidating underlying mechanisms. Using this approach, our goals were to identify dimensions of DB most sensitive to PTE prior to school entry and assess contextual variation in these dimensions.

Methods—A community obstetric sample of N=369 women (79.2% lifetime smokers; 70.2% pregnancy smokers) from two Midwestern cities were assessed for PTE using cotinine-calibrated interview-based reports at 16, 28, and 40 weeks of gestation. A subset of n=244 who completed observational assessments with their …

2020 (32nd) Report Of The Nou Records Committee, Mark A. Brogie

Nebraska Bird Review

ebraska: 2017” (NOURC 2017).

Nebraska State List: The following includes all revisions made by the American Ornithological Society (Chesser et al. 2020) in 2020 including scientific name changes and taxonomic realignment that affect the current published “Official List of the Birds of Nebraska: 2017” (NOURC 2017, wwwNOUbirds.org). This report includes all accounts submitted during the 2020 calendar year covering 29 records with accession numbers 2258 – 2286.

2020 Additions/Deletions to the “Official List of the Birds of Nebraska”: Two new species were added in 2020.: Black Phoebe (Sayornis nigricans) 1. A single bird was photographed (Class 1-P, TL) 26 April …

Assessments And Accommodations For English Language Learners: A Literature Review, Heidi Jo Bartlett

The Nebraska Educator: A Student-Led Journal

While research in how English language learners (ELLs) use assessment accommodations is lacking, there are some general conclusions that one can draw. First, teachers must know their students’ abilities. This includes knowledge of their English proficiency, knowledge of their first language skills, especially as it pertains to literacy skills, and knowledge of their content area understanding. If teachers are aware of areas of weakness in students’ assessments, they should work to compensate for them by either changing their instruction or providing assessment accommodations. Second, it is important for teachers to recognize the various types of assessment accommodations that are available …

Advice For Educational Counselors, Advisors, Faculty, And Staff: Paving The Pathways To Post-Secondary Education: Removing Barriers And Creating Opportunities For Students Of Color (Soc) And First-Generation College Students (Fgcs) To Flourish, Amanda R. Morales, Edmund T. Hamann

Department of Teaching, Learning, and Teacher Education: Faculty Publications

The purpose of this Equity Tool is to guide education stakeholders with roles in various parts of high school students’ development, in developing shared understandings to discuss the transition from high school to higher education.

For supplemental guidance, please see the companion pamphlet for Students of Color and First Generation College Students: Advice for Students of Color and First-Generation Students: Successful Transitions from High School into and Within College/University

Neurobehavioral Correlates Associated With Melodic Intonation Therapy For Adults With Nonfluent Aphasia, Caitlin Norquist

College of Education and Human Sciences: Dissertations, Theses, and Student Research

Recent trends in neuroimaging, as it relates to the field of communication disorders, have shed new light on the nature of neuroplasticity and reorganization of brain function as it pertains to recovery from nonfluent aphasia following Melodic Intonation Therapy (MIT). However, demographic limitations in these client populations necessitate synthesis across individual studies to form meaningful patterns for application to clinical practice. We conducted a systematic review of all studies involving pre-and post-treatment neurological and behavioral measures following MIT treatment for adults with nonfluent aphasia. Ten studies were identified for synthesis involving a variety of languages, treatment conditions, and neuroimaging and …

Spontaneous Fluctuations In A Magnetic Fe/Gd Skyrmion Lattice, M. H. Seaberg, B. Holladay, S. A. Montoya, X. Y. Zheng, J. C.T. Lee, A. H. Reid, J. D. Koralek, L. Shen, V. Esposito, G. Coslovich, P. Walter, S. Zohar, V. Thampy, M. F. Lin, P. Hart, K. Nakahara, R. Streubel, S. D. Kevan, P. Fischer, W. Colocho, A. Lutman, F. J. Decker, E. E. Fullerton, M. Dunne, S. Roy, S. K. Sinha, J. J. Turner

Robert Streubel Papers

Magnetic skyrmions are topological spin textures that exhibit classical or quantum quasiparticle behavior. A substantial amount of research has occurred in this field, both because of their unique electromagnetic properties and potential application for future nonvolatile memory storage applications, as well as fundamental questions on their topology and unique magnetic phases. Here, we investigate the fluctuation properties of a magnetic Fe/Gd skyrmion lattice, using short-pulsed x rays. We first measure spontaneous fluctuations of the skyrmion lattice phase and find an inherent, collective mode showing an underdamped oscillation with a relaxation of a couple of nanoseconds. Further observations track the response …

Plague Exposure In Mammalian Wildlife Across The Western United States, Sarah N. Bevins, Jeffrey C. Chandler, Nicole Barrett, Brandon S. Schmit, Gerald W. Wiscomb, Susan A. Shriner

United States Department of Agriculture Wildlife Services: Staff Publications

Plague is caused by a bacterial pathogen (Yersinia pestis) that can infect a wide range of mammal species, but its presence in wildlife is often underappreciated. Using a large-scale data set (n = 44,857) that details the extent of Y. pestis exposure in wildlife, we document exposure in 18 wildlife species, including coyotes (Canis latrans), bobcats (Lynx rufus), and black bears (Ursus americanus). Evidence of plague activity is widespread, with seropositive animals detected in every western state in the contiguous United States. Pathogen monitoring systems in wildlife that are both large scale …

Improving Animal Monitoring Using Small Unmanned Aircraft Systems (Suas) And Deep Learning Networks, Meilun Zhou, Jared A. Elmore, Sathishkumar Samiappan, Kristine O. Evans, Morgan Pfeiffer, Bradley F. Blackwell, Raymond B. Iglay

United States Department of Agriculture Wildlife Services: Staff Publications

In recent years, small unmanned aircraft systems (sUAS) have been used widely to monitor animals because of their customizability, ease of operating, ability to access difficult to navigate places, and potential to minimize disturbance to animals. Automatic identification and classification of animals through images acquired using a sUAS may solve critical problems such as monitoring large areas with high vehicle traffic for animals to prevent collisions, such as animal-aircraft collisions on airports. In this research we demonstrate automated identification of four animal species using deep learning animal classification models trained on sUAS collected images. We used a sUAS mounted with …

Posterior Propriety Of An Objective Prior For Generalized Hierarchical Normal Linear Models, Cong Lin, Dongchu Sun, Chengyuan Song

Department of Statistics: Faculty Publications

Bayesian Hierarchical models has been widely used in modern statistical application. To deal with the data having complex structures, we propose a generalized hierarchical normal linear (GHNL) model which accommodates arbitrarily many levels, usual design matrices and ‘vanilla’ covariance matrices. Objective hyperpriors can be employed for the GHNL model to express ignorance or match frequentist properties, yet the common objective Bayesian approaches are infeasible or fraught with danger in hierarchical modelling. To tackle this issue, [Berger, J., Sun, D., & Song, C. (2020b). An objective prior for hyperparameters in normal hierarchical models. Journal of Multivariate Analysis, 178, 104606. https://doi.org/10.1016/j.jmva.2020.104606] …

Spin-Orbit Dependence Of Anisotropic Current-Induced Spin Polarization, L. L. Tao, Evgeny Y. Tsymbal

Department of Physics and Astronomy: Faculty Publications

Studies of the current-induced spin polarization (CISP) have been recently reinvigorated due to the discoveries of CISP in some burgeoning materials such as oxide interfaces, van der Waals, and topological quantum materials. Here, we investigate the CISP in two-dimensional systems for different types of spin-orbit coupling (SOC) using the Boltzmann transport theory. We find an anisotropic response of CISP to the current direction which strongly depends on the type of SOC. We demonstrate that the CISP is nonlinear with respect to the SOC magnitude, depends on the Fermi energy, and exhibits two different transport regimes for low or high carrier …

Linking Human Resources And Child Welfare Data (Video), Quality Improvement Center For Workforce Development

Workforce Analytics Resources

When examining workforce data, it can be valuable to capitalize on data from a variety of systems, such as various human resources (HR) databases, learning management systems, and child welfare information systems. Each can be useful on their own, but additional information can be learned when different types of data are connected. For example, applicant information may be stored in a database that is separate from other HR data on those hired, and there is value in looking at the connections between applicant data and later aspects of employment.

Data linkage involves pairing observations from two or more data files …

Lacustrine Leaf Wax Hydrogen Isotopes Indicate Strong Regional Climate Feedbacks In Beringia Since The Last Ice Age, W. C. Daniels, J. M. Russell, C. Morrill, W. M. Longo, A. E. Giblin, P. Holland-Stergar, J. M. Welker, X. Wen, A. Hu, Y. Huang

United States Department of Commerce: Staff Publications

The Late-Quaternary climate of Beringia remains unresolved despite the region's role in modulating glacial-interglacial climate and as the likely conduit for human dispersal into the Americas. Here, we investigate Beringian temperature change using an ~32,000-year lacustrine record of leaf wax hydrogen isotope ratios (δ²H_wax) from Arctic Alaska. Based on Monte Carlo iterations accounting for multiple sources of uncertainty, the reconstructed summertime temperatures were ~3 ^oC colder (range: -8 to +3 ^oC) during the Last Glacial Maximum (LGM; 21-25 ka) than the pre-industrial era (PI; 2-0.1 ka). This ice-age summer cooling is substantially smaller than …

Pour Une Littérature Critique, Warren Motte

Zea E-Books Collection

Ce livre prend comme objet la littérature critique, c'est-à-dire, des ouvrages conçus dans un esprit critique, qui invitent leurs lectrices et lecteurs—soit de façon ouverte, soit de façon couverte, subtile et nuancée—à s'engager avec la textualité de manière critique. Cette dynamique, suspendue entre production et réception, est hypothétique et fragile; elle est difficile à théoriser de façon satisfaisante; elle est ardue à tracer en se servant d'une stratégie lectorale conventionnelle. Pourtant, c'est précisément ce phénomène articulé et réciproque qui fournit à cette sorte de textualité une mobilité tout à fait rafraîchissante, mobilité qui rend possible la signification littéraire sur un …

Deepsec: A Deep Learning Framework For Secreted Protein Discovery In Human Body Fluids, Dan Shao, Lan Huang, Yan Wang, Kai He, Xueteng Cui, Yao Wang, Qin Ma, Juan Cui

School of Computing: Faculty Publications

Motivation: Human proteins that are secreted into different body fluids from various cells and tissues can be promising disease indicators. Modern proteomics research empowered by both qualitative and quantitative profiling techniques has made great progress in protein discovery in various human fluids. However, due to the large number of proteins and diverse modifications present in the fluids, as well as the existing technical limits of major proteomics platforms (e.g. mass spectrometry), large discrepancies are often generated from different experimental studies. As a result, a comprehensive proteomics landscape across major human fluids are not well determined.

Results: To bridge …

Extended Haplotype-Phasing Of Long-Read De Novo Genome Assemblies Using Hi-C, Zev N. Kronenberg, Arang Rhie, Sergey Koren, Gregory T. Concepcion, Paul Peluso, Katherine M. Munson, David Porubsky, Kristen Kuhn, Kathryn A. Mueller, Wai Yee Low, Stefan Hiendleder, Olivier Fedrigo, Ivan Liachko, Richard J. Hall, Adam M. Phillippy, Evan E. Eichler, John L. Williams, Timothy P.L. Smith, Erich D. Jarvis, Shawn T. Sullivan, Sarah B. Kingan

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Haplotype-resolved genome assemblies are important for understanding how combinations of variants impact phenotypes. To date, these assemblies have been best created with complex protocols, such as cultured cells that contain a single-haplotype (haploid) genome, single cells where haplotypes are separated, or co-sequencing of parental genomes in a triobased approach. These approaches are impractical in most situations. To address this issue, we present FALCON-Phase, a phasing tool that uses ultra-long-range Hi-C chromatin interaction data to extend phase blocks of partially-phased diploid assembles to chromosome or scaffold scale. FALCON-Phase uses the inherent phasing information in Hi-C reads, skipping variant calling, and reduces …

The New American Dream: Neoliberal Transformation As Character Development In Schitt’S Creek, William Joseph Sipe

Department of Communication Studies: Faculty Publications

This article contextualizes the popular sitcom Schitt’s Creek within an era of unprecedented economic inequality and growing distain for the ultrawealthy. Via its over-the-top and self-effacing humor, the program invites audiences to discipline the Rose family for their former life of leisure and ultimately celebrate as each character is transformed into an ideal neoliberal subject via economic precarity and entrepreneurism. Through an analysis of the show’s 6 seasons, this essay articulates how the myth of the American Dream has adapted to neoliberal ideology that prizes precarity as a state of possibility and rejects leisure as laziness. Schitt’s Creek is emblematic …

Effect Of A Trace Mineral Injection On Performance And Trace Mineral Status Of Beef Cows And Calves, Carmen J. Willmore, John B. Hall, Mary E. Drewnoski

Department of Animal Science: Faculty Publications

The objective was to determine the effects of an injectable trace mineral (TMI; Multimin 90) containing copper (Cu), manganese (Mn), selenium (Se), and zinc (Zn) on trace mineral status and the resulting impacts on reproduction of beef cows and the growth of their calves. Beef cows (n = 200) were assigned to receive TMI or no injection (CON) prior to calving and breeding over two consecutive years. Calves born to cows receiving TMI also received TMI at birth in both years and at 49 ± 1.3 days of age in year 1. The TMI increased (p = 0.01) liver Zn …

Teaching Writing Strategies To Students Who Are Deaf Or Hard Of Hearing, Kyrie Kellogg

College of Education and Human Sciences: Dissertations, Theses, and Student Research

Students who are deaf or hard of hearing (DHH) may access language differently than their typical hearing peers, or they may require additional supports and accommodations. This can lead to differences in communication modes and styles that can make communication and language development difficult, which can impact reading and writing skills. When their specific writing concerns are addressed, writing offers these students another outlet to express their ideas, share thoughts, and engage in meaningful communication with others. The purpose of this study was to examine whether Self-Regulated Strategy Development (SRSD) persuasive writing strategies would help improve writing length and quality …

Tandem Duplicate Expression Patterns Are Conserved Between Maize Haplotypes Of The Α-Zein Gene Family, Preston Hurst, James C. Schnable, David R. Holding

Department of Agronomy and Horticulture: Faculty Publications

Tandem duplication gives rise to copy number variation and subsequent functional novelty among genes as well as diversity between individuals in a species. Functional novelty can result from either divergence in coding sequence or divergence in patterns of gene transcriptional regulation. Here, we investigate conservation and divergence of both gene sequence and gene regulation between the copies of the α-zein gene family in maize inbreds B73 and W22. We used RNA-seq data generated from developing, self-pollinated kernels at three developmental stages timed to coincide with early and peak zein expression. The reference genome annotations for B73 and W22 were modified …

Associations Between Community Built Environments With Early Care And Education Classroom Physical Activity Practices And Barriers, Bethany D. Williams, Susan B. Sisson, Dipti Dev, Bryce Lowery, Diane Horm, Janis Campbell, Denise Finneran, Jennifer Graef-Downard, Linda Whaley

Department of Child, Youth, and Family Studies: Faculty Publications

The influence of community-built environments on physical activity (PA) support in Early Childhood Education settings (ECEs) is unknown. The purpose of this cross-sectional study was to determine associations between community PA environments and ECE classroom PA practices. We included licensed Oklahoma ECE directors serving 3-to-5-year-old children. Parks and playground locations were exported from Google Earth. NationalWalkability Index was derived from 2010 US Census data. ArcMap 10.6 was used to geocode ECE locations, which were within an Activity Desert if no parks/playgrounds were located within a 1-mile radius or if Walkability Index was 10.5 or below. Classroom PA practices were determined …

High Sensitivity Multi-Axes Rotation Sensing Using Large Momentum Transfer Point Source Atom Interferometry, Jinyang Li, Gregório R. M. Da Silva, Wayne Cheng-Wei Huang, Mohamed Fouda, Jason Bonacum, Timothy L. Kovachy, Selim M. Shahriar

Department of Physics and Astronomy: Faculty Publications

A point source interferometer (PSI) is a device where atoms are split and recombined by applying a temporal sequence of Raman pulses during the expansion of a cloud of cold atoms behaving approximately as a point source. The PSI can work as a sensitive multi-axes gyroscope that can automatically filter out the signal from accelerations. The phase shift arising from the rotations is proportional to the momentum transferred to each atom from the Raman pulses. Therefore, by increasing the momentum transfer, it should be possible to enhance the sensitivity of the PSI. Here, we investigate the degree of enhancement in …

Invader Removal Triggers Competitive Release In A Threatened Avian Predator, J. David Wiens, Katie M. Dugger, J. Mark Higley, Damon B. Lesmeister, Alan B. Franklin, Keith A. Hamm, Gary C. White, Krista E. Dilione, David C. Simon, Robin R. Bown, Peter C. Carlson, Charles B. Yackulic, James D. Nichols, James E. Hines, Raymond J. Davis, David W. Lamphear, Christopher Mccafferty, Trent L. Mcdonald, Stan G. Sovern

United States Department of Agriculture Wildlife Services: Staff Publications

Changes in the distribution and abundance of invasive species can have far-reaching ecological consequences. Programs to control invaders are common but gauging the effectiveness of such programs using carefully controlled, large-scale field experiments is rare, especially at higher trophic levels. Experimental manipulations coupled with long-term demographic monitoring can reveal the mechanistic underpinnings of interspecific competition among apex predators and suggest mitigation options for invasive species. We used a large-scale before-after control-impact removal experiment to investigate the effects of an invasive competitor, the barred owl (Strix varia), on the population dynamics of an iconic old-forest native species, the northern spotted owl …

Classifying Ingestive Behavior Of Dairy Cows Via Automatic Sound Recognition, Guoming Li, Yijie Xiong, Qian Du, Zhengxiang Shi, Richard S. Gates

Department of Animal Science: Faculty Publications

Determining ingestive behaviors of dairy cows is critical to evaluate their productivity and health status. The objectives of this research were to (1) develop the relationship between forage species/heights and sound characteristics of three different ingestive behaviors (bites, chews, and chew-bites); (2) comparatively evaluate three deep learning models and optimization strategies for classifying the three behaviors; and (3) examine the ability of deep learning modeling for classifying the three ingestive behaviors under various forage characteristics. The results show that the amplitude and duration of the bite, chew, and chew-bite sounds were mostly larger for tall forages (tall fescue and alfalfa) …

Pilot-Scale H2S And Swine Odor Removal System Using Commercially Available Biochar, Kyoung S. Ro, Brian Woodbury, Mindy Spiehs, Ariel A. Szogi, Philip J. Silva, Okhwa Hwang, Sungback Cho

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Although biochars made in laboratory seem to remove H2S and odorous compounds effectively, very few studies are available for commercial biochars. This study evaluated the efficacy of a commercial biochar (CBC) for removing H2S and odorous volatile organic compounds (VOCs). We found that the well-known Ergun equation may not be adequate in predicting pressure drop for properly sizing a ventilation system. The H2S breakthrough adsorption capacity of the CBC was 2.51 mg/g under humid conditions, which was much higher than that for dry conditions. The breakthrough capacity increased with the influent concentration of H2S. The efficacy of a pilot-scale biochar …

Evolution Of The Sheep Industry And Genetic Research In The United States: Opportunities For Convergence In The Twenty-First Century, J. W. Thorne, B. M. Murdoch, B. A. Freking, R. R. Redden, Thomas W. Murphy, J. B. Taylor, Harvey D. Blackburn

Roman L. Hruska U.S. Meat Animal Research Center: Reports

The continuous development and application of technology for genetic improvement is a key element for advancing sheep production in the United States. The US sheep industry has contracted over time but appears to be at a juncture where a greater utilization of technology can facilitate industry expansion to new markets and address inefficiencies in traditional production practices. Significant transformations include the increased value of lamb in relation to wool, and a downtrend in large-scale operations but a simultaneous rise in small flocks. Additionally, popularity of hair breeds not requiring shearing has surged, particularly in semi-arid and subtropical US environments. A …

Examining Correlates Of Feeding Practices Among Parents Of Preschoolers, Deepa Srivastava, Lucy R. Zheng, Dipti Dev

Department of Child, Youth, and Family Studies: Faculty Publications

Background: Parent feeding practices play a critical role in children’s eating behaviors. Limited research has explored child-level correlates of parent feeding practices.

Aim: To identify correlates of feeding practices (responsive and controlling) among parents of preschoolers in the United States.

Methods: Participants included parents (n = 273) of preschoolers (3–5 years), recruited from early care and education settings (n = 24) located in a metropolitan city in the US. Analysis included descriptives, correlations, and multiple regression.

Results: For responsive feeding practices, positive associations included child’s weight with unintentional modeling (β = .17, 95% CI [0.12, 0.53]), child vegetable …

Breed And Heterotic Effects For Mature Weight In Beef Cattle, Madeline J. Zimmermann, Larry A. Kuehn, Matthew L. Spangler, R. M. Thallman, Warren M. Snelling, Ronald M. Lewis

Department of Animal Science: Faculty Publications

Cow mature weight (MWT) is heritable and affects the costs and efficiency of a breeding operation. Cow weight is also influenced by the environment, and the relationship between the size and profitability of a cow varies depending on production system. Producers, therefore, need tools to incorporate MWT in their selection of cattle breeds and herd replacements. The objective of this study was to estimate breed and heterotic effects for MWT using weight-age data on crossbred cows. Cow's MWT at 6 yr was predicted from the estimated parameter values-asymptotic weight and maturation constant (k)-from the fit of the Brody function to …

A Real-World, Hybrid Event Sequence Generation Framework For Android Apps, Jun Sun

School of Computing: Dissertations, Theses, and Student Research

Generating meaningful inputs for Android apps is still a challenging issue that needs more research. Past research efforts have shown that random test generation is still an effective means to exercise User-Interface (UI) events to achieve high code coverage. At the same time, heuristic search approaches can effectively reach specified code targets. Our investigation shows that these approaches alone are insufficient to generate inputs that can exercise specific code locations in complex Android applications.

This thesis introduces a hybrid approach that combines two different input generation techniques--heuristic search based on genetic algorithm and random instigation of UI events, to reach …

Using Contextual Bandits To Improve Traffic Performance In Edge Network, Aziza Al Zadjali

School of Computing: Dissertations, Theses, and Student Research

Edge computing network is a great candidate to reduce latency and enhance performance of the Internet. The flexibility afforded by Edge computing to handle data creates exciting range of possibilities. However, Edge servers have some limitations since Edge computing process and analyze partial sets of information. It is challenging to allocate computing and network resources rationally to satisfy the requirement of mobile devices under uncertain wireless network, and meet the constraints of datacenter servers too. To combat these issues, this dissertation proposes smart multi armed bandit algorithms that decide the appropriate connection setup for multiple network access technologies on the …