Physical Sciences and Mathematics Commons^™

Robust Wavefront Dislocations Of Friedel Oscillations In Gapped Graphene, Shu-Hui Zhang, Jin Yang, Ding-Fu Shao, Zhenhua Wu, Wen Yang

Department of Physics and Astronomy: Faculty Publications

Friedel oscillation is a well-known wave phenomenon which represents the oscillatory response of electron waves to imperfection. By utilizing the pseudospin-momentum locking in gapless graphene, two recent experiments demonstrate the measurement of the topological Berry phase by corresponding to the unique number of wavefront dislocations in Friedel oscillations. Here, we study the Friedel oscillations in gapped graphene, in which the pseudospin-momentum locking is broken. Unusually, the wavefront dislocations do occur like that in gapless graphene, which requires immediate verification in the current experimental condition. The number of wavefront dislocations is ascribed to the invariant pseudospin winding number in gapped and …

Analysis Of Winter Weather Conditions And Their Relationship To Crashes In Nebraska, John Cecava

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

Adverse weather conditions: such as changes in visibility, precipitation, wind speed, temperature, and road surface conditions, substantially impact highway and interstate safety. Therefore, an investigation into the winter weather conditions during highway and interstate crashes in Nebraska was conducted. Crash data were obtained from the Nebraska Department of Transportation (NDOT) for the years 2008 to 2018. In order to separate the non-winter weather related crashes and the winter weather related crashes, six filtrations were applied to make this possible. These filters were based on a few crash parameters: road classification, alcohol, and crash severity, and weather parameters within the crash …

A Multiproxy Database Of Western North American Holocene Paleoclimate Records, Cody Routson, Darrell S. Kaufman, Nicholas P. Mckay, Michael P. Erb, Stephanie H. Arcusa, Kendrick J. Brown, Matthew E. Kirby, Jeremiah P. Marsicek, R Scott Anderson, Gonzalo Jimenez-Moreno, Jessica R. Rodysill, Matthew S. Lachniet, Sherilyn C. Fritz, Joseph R. Bennett, Michelle F. Goman, Sarah E. Metcalfe, Jennifer M. Galloway, Gerrit Schoups, David B. Wahl, Jesse L. Morris, Francisca Staines-Urias, Andria Dawson, Bryan N. Shuman, Daniel G. Gavin, Jeffrey S. Munroe, Brian F. Cumming

Department of Earth and Atmospheric Sciences: Faculty Publications

Holocene climate reconstructions are useful for understanding the diverse features and spatial heterogeneity of past and future climate change. Here we present a database of western North American Holocene paleoclimate records. The database gathers paleoclimate time series from 184 terrestrial and marine sites, including 381 individual proxy records. The records span at least 4000 of the last 12 000 years (median duration of 10 725 years) and have been screened for resolution, chronologic control, and climate sensitivity. Records were included that reflect temperature, hydroclimate, or circulation features. The database is shared in the machine readable Linked Paleo Data (LiPD) format …

Removal Of Carbamazepine Onto Modified Zeolitic Tuff In Different Water Matrices: Batch And Continuous Flow Experiments, Othman A. Al-Mashaqbeh, Diya A. Alsafadi, Layal Z. Alsalhi, Shannon L. Bartelt-Hunt, Daniel D. Snow

Nebraska Water Center: Faculty Publications

Carbamazepine (CBZ) is the most frequently detected pharmaceutical residues in aquatic environments effluent by wastewater treatment plants. Batch and column experiments were conducted to evaluate the removal of CBZ from ultra-pure water and wastewater treatment plant (WWTP) effluent using raw zeolitic tuff (RZT) and surfactant modified zeolite (SMZ). Point zero net charge (pHpzc), X-ray diffraction (XRD), X-ray fluorescence (XRF), and Fourier Transform Infrared (FTIR) were investigated for adsorbents to evaluate the physiochemical changes resulted from the modification process using Hexadecyltrimethylammonium bromide (HDTMA-Br). XRD and FTIR showed that the surfactant modification of RZT has created an amorphous surface with new alkyl …

Microfluidic-Based Bacterial Molecular Computing On A Chip, Daniel P. Martins, Michael Taynnan Barros, Benjamin O'Sullivan, Ian Seymour, Alan O'Riordan, Lee Coffey, Joseph Sweeney, Sasitharan Balasubramaniam,

School of Computing: Faculty Publications

Biocomputing systems based on engineered bacteria can lead to novel tools for environmental monitoring and detection of metabolic diseases. In this paper, we propose a Bacterial Molecular Computing on a Chip (BMCoC) using microfluidic and electrochemical sensing technologies. The computing can be flexibly integrated into the chip, but we focus on engineered bacterial AND Boolean logic gate and ON-OFF switch sensors that produces secondary signals to change the pH and dissolved oxygen concentrations. We present a prototype with experimental results that shows the electrochemical sensors can detect small pH and dissolved oxygen concentration changes created by the engineered bacterial populations’ …

Modern Silicon Dynamics Of A Small High-Latitude Subarctic Lake, Petra Zahajska, Carolina Olid, Johanna Stadmark, Sherilyn C. Fritz, Sophie Opfergelt, Daniel J. Conley

Department of Earth and Atmospheric Sciences: Faculty Publications

High biogenic silica (BSi) concentrations occur sporadically in lake sediments throughout the world; however, the processes leading to high BSi concentrations vary. We explored the factors responsible for the high BSi concentration in sediments of a small, high-latitude subarctic lake (Lake 850). The Si budget of this lake had not been fully characterized before to establish the drivers of BSi accumulation in this environment. To do this, we combined measurements of variations in stream discharge, dissolved silica (DSi) concentrations, and stable Si isotopes in both lake and stream water with measurements of BSi content in lake sediments. Water, radon, and …

Considering The Use Of The Terms Strain And Adaptation In Prion Research, Robert M. Zink

School of Natural Resources: Faculty Publications

Evolutionary biologists and disease biologists use the terms strain and adaptation in Chronic Wasting Disease (CWD) research in different ways. In evolutionary biology, a strain is a nascent genetic lineage that can be described by a genealogy, and a phylogenetic nomenclature constructed to reflect that genealogy. Prion strains are described as showing distinct host range, clinical presentation, disease progression, and neuropathological and PrP biochemical profiles, and lack information that would permit phylogenetic reconstruction of their history. Prion strains are alternative protein conformations, sometimes derived from the same genotype. I suggest referring to prion strains as ecotypes, because the variant phenotypic …

Testing A Global Standard For Quantifying Species Recovery And Assessing Conservation Impact, Molly K. Grace, H Resit Akcakaya, Elizabeth L. Bennett, Thomas M. Brooks, Anna Heath, Simon Hedges, Craig Hilton-Taylor, Michael Hoffmann, Axel Hochkirch, Richard Jenkins, David A. Keith, Barney Long, David P. Mallon, Erik Meijaard, E.J. Milner-Gulland, Jon Paul Rodriguez, P J. Stephenson, Simon N. Stuart, Richard P. Young, Pablo Acebes, Joanna Alfaro-Shigueto, Silvia Alvarez-Clare, Raphali Rodlis Andriantsimanarilafy, Marina Arbetman, Claudio Azat, Gianluigi Bacchetta, Ruchi Badola, Luis M.D. Barcelos, Joao Pedro Barreiros, Sayanti Basak, Danielle J. Berger, Sabuj Bhattacharyya, Gilad Bino, Paulo A.V. Borges, Raoul K. Boughton, H Jane Brockmann, Hannah L. Buckley, Ian J. Burfield, James Burton, Teresa Camacho-Badani, Luis Santiago Cano-Alonso, Ruth H. Carmichael, Christina Carrero, John P. Carroll, Giorgos Catsadorakis, David G. Chapple, Guillaume Chapron, Gawsia Wahidunnessa Chowdhury, Louw Claassens, Donatella Cogoni, Rochelle Constantine, Christie Anne Craig, Andrew A. Cunningham, Nishma Dahal, Jennifer C. Daltry, Goura Chandra Das, Niladri Dasgupta, Alexandra Davey, Katharine Davies, Pedro Develey, Vanitha Elangovan, David Fairclough, Mirko Di Febbraro, Giuseppe Fenu, Fernando Moreira Fernandes, Eduardo Pinheiro Fernandez, Brittany Finucci, Rita Foldesi, Catherine M. Foley, Matthew Ford, Michael R.J. Forstner, Nestor Garcia, Ricardo Garcia-Sandoval, Penny C. Gardner, Roberto Garibay-Orijel, Marites Gatan-Balbas, Irene Gauto, Mirza Ghazanfar Ullah Ghazi, Stephanie S. Godfrey, Matthew Gollock, Benito A. Gonzalez, Tandora D. Grant, Thomas Gray, Andrew J. Gregory, Roy H.A. Van Grunsven, Marieka Gryzenhout, Noelle C. Guernsey, Garima Gupta, Christina Hagen, Christian A. Hagen, Madison B. Hall, Eric Hallerman, Kelly Hare, Tom Hart, Ruston Hartdegen, Yvette Harvey-Brown, Richard Hatfield, Tahneal Hawke, Claudia Hermes, Rod Hitchmough, Pablo Melo Hoffmann, Charlie Howarth, Michael A. Hudson, Syed Ainul Hussain, Charlie Huveneers, Helene Jacques, Dennis Jorgensen, Suyash Katdare, Lydia K.D. Katsis, Rahul Kaul, Boaz Kaundra-Arara, Lucy Keith-Diagne, Daniel T. Kraus, Thales Moreira De Lima, Ken Lindeman, Jean Linsky, Edward Louis Jr., Anna Loy, Eimear Nic Lughadha, Jeffrey C. Mangel, Paul E. Marinari, Gabriel M. Martin, Gustavo Martinelli, Philip J.K. Mcgowan, Alistair Mcinnes, Eduardo Teles Barbosa Mendes, Michael J. Millard, Claire Mirande, Daniel Money, Joanne M. Monks, Carolina Laura Morales, Nazia Noareen Mumu, Raquel Negrao, Anh Ha Nguyen, Nazmul Hasan Niloy Md., Grant Leslie Norbury, Cale Nordmeyer, Darren Norris, Mark O'Brien, Gabriela Akemi Oda, Simone Orsengio, Mark Evan Outerbridge, Stesha Pasachnik, Juan Carlos Perez-Jimenez, Charlotte Pike, Fred Pilkington, Glenn Plumb, Rita De Cassia Quitete Portela, Ana Prohaska, Manuel G. Quintana, Eddie Fanantenana Rakotondrasoa, Dustin H. Ranglack, Hassan Rankou, Ajay Prakash Rawat, James Thomas Reardon, Marcelo Lopes Rheingantz, Stephen C. Richter, Malin C. Rivers, Luke Rollie Rogers, Patricia Da Rosa, Paul Rose, Emily Royer, Catherine Ryan, Yvonne J. Sadovy De Mitcheson, Lily Salmon, Carlos Henrique Salvador, Michael J. Samways, Tatiana Sanjuan, Amanda Souza Dos Santos, Hiroshi Sasaki, Emmanuel Shutz, Heather Ann Scott, Robert Michael Scott, Fabrizio Serena, Surya P. Sharma, John A. Shuey, Carlos Julio Polo Silva, John P. Simaika, David R. Smith, Julia L.Y. Spaet, Shanjida Sultana, Bibhab Kumar Talukdar, Vikash Tatayah, Philip Thomas, Angela Tringali, Hoang Trinh-Dinh, Chongpi Tuboi, Aftab Alam Usami, Aida M. Vasco-Palacios, Jean-Christophe Vie, Jo Virens, Alan Walker, Bryan Wallace, Lauren J. Waller, Hongfeng Wang, Oliver R. Wearn, Merlijin Van Weerd, Simon Weigmann, Daniel Willcox, John Woinarski, Jean W.H. Yong, Stuart Young

School of Natural Resources: Faculty Publications

Recognizing the imperative to evaluate species recovery and conservation impact, in 2012 the International Union for Conservation of Nature (IUCN) called for development of a “Green List of Species” (now the IUCN Green Status of Species). A draft Green Status framework for assessing species’ progress toward recovery, published in 2018, proposed 2 separate but interlinked components: a standardized method (i.e., measurement against benchmarks of species’ viability, functionality, and preimpact distribution) to determine current species recovery status (herein species recovery score) and application of that method to estimate past and potential future impacts of conservation based on 4 metrics (conservation legacy, …

Moderate Grazer Density Stabilizes Forage Availability More Than Patch Burning In Low-Stature Grassland, Edward J. Raynor, Devan Allen Mcgranahan, James R. Miller, Diane M. Debinski, Walter H. Schacht, David M. Engle

School of Natural Resources: Faculty Publications

Spatially patchy fire creates landscape-level diversity that in turn stabilizes several rangeland ecosystem services, including forage production and habitat availability. To enhance biodiversity and livestock production, efforts are underway to restore fire regimes in rangelands throughout the Great Plains. However, invasive species such as tall fescue Schedonorus arundinaceus syn. Festuca arundinacea, initially introduced for forage production, hamper prescribed fire use. Grazer density, or stocking rate, modulates the effect of patchy fire regimes on ecological patterns in invaded, seminatural rangeland pastures. We compare three diversity–stability responses—temporal variability in aboveground plant biomass, portfolio effects among plant functional groups, and beta diversity in …

Using Enclosed Y-Mazes To Assess Chemosensory Behavior In Reptiles, M. Rockwell Parker, Andrea F. Currylow, Eric A. Tillman, Charlotte J. Robinson, Jilian M. Josimovich, Isabella M.G. Bukovich, Lauren A. Nazarian, Melia G. Nafus, Bryan M. Kluever, Amy A. Yackel Adams

United States Department of Agriculture Wildlife Services: Staff Publications

Reptiles utilize a variety of environmental cues to inform and drive animal behavior such as chemical scent trails produced by food or conspecifics. Decrypting the scent-trailing behavior of vertebrates, particularly invasive species, enables the discovery of cues that induce exploratory behavior and can aid in the development of valuable basic and applied biological tools. However, pinpointing behaviors dominantly driven by chemical cues versus other competing environmental cues can be challenging. Y-mazes are common tools used in animal behavior research that allow quantification of vertebrate chemosensory behavior across a range of taxa. By reducing external stimuli, Y-mazes remove confounding factors and …

S Is For Sandhill: A Crane Alphabet, Paul A. Johnsgard

Zea E-Books Collection

This is a book of cranes, from A to Z, written and illustrated by the world’s foremost authority on the 15 species of these wonderful and ancient birds. It is a book for all ages, and for all who love and marvel at the beauty, order, and variety of the natural world.

Cranes exhibit complex behavior, pair-bonding, and fascinating social interactions. They migrate huge distances, crossing continents, oceans, and mountains between their nesting and wintering areas. Seven of the world’s 15 crane species are listed as “vulnerable,” three as “endangered,” one as “critically endangered,” and only three as of “least …

Removal Of Carbamazepine Onto Modified Zeolitic Tuff In Different Water Matrices: Batch And Continuous Flow Experiments, Othman A. Al-Mashaqbeh, Daniel D. Snow, Diya A. Alsafadi, Layal Z. Alsalhi, Shannon L. Bartelt-Hunt

School of Natural Resources: Faculty Publications

Carbamazepine (CBZ) is the most frequently detected pharmaceutical residues in aquatic environments effluent by wastewater treatment plants. Batch and column experiments were con-ducted to evaluate the removal of CBZ from ultra-pure water and wastewater treatment plant (WWTP) effluent using raw zeolitic tuff (RZT) and surfactant modified zeolite (SMZ). Point zero net charge (pHpzc), X-ray diffraction (XRD), X-ray fluorescence (XRF), and Fourier Transform Infrared (FTIR) were investigated for adsorbents to evaluate the physiochemical changes resulted from the modification process using Hexadecyltrimethylammonium bromide (HDTMA-Br). XRD and FTIR showed that the surfactant modification of RZT has created an amorphous surface with new alkyl …

Case Studies Of Alberta Clipper Systems And The Impacts On Winter Weather Road Maintenance, Cameron Wunderlin

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

Winter weather can cause profound impacts to a variety of economic sectors in the mid-latitudes. In the Great Plains of North America, one sector that is highly impacted by winter weather is road transportation. The burdens to road transportation caused by winter weather have led to the adoption of a Maintenance Decision Support System (MDSS) by the Nebraska Department of Transportation (NDOT). Using both observational and numerical weather model data, NDOT-MDSS generates both winter weather forecasts and winter road maintenance recommendations. Little is known about how well NDOT-MDSS is forecasting conditions for different winter weather events. Using a case study …

Program, The Nebraska Academy Of Sciences: One Hundred-Thirty-First Annual Meeting, April 23-24, 2021. Online, The Nebraska Academy Of Sciences, Inc.

Nebraska Academy of Sciences: Programs and Proceedings

AFFILIATED SOCIETIES OF THE NEBRASKA ACADEMY OF SCIENCES, INC.

1.American Association of Physics Teachers, Nebraska Section: Web site: http://www.aapt.org/sections/officers.cfm?section=Nebraska

2.Friends of Loren Eiseley: Web site: http://www.eiseley.org/

3.Lincoln Gem & Mineral Club: Web site: http://www.lincolngemmineralclub.org/

4.Nebraska Chapter, National Council for Geographic Education

5.Nebraska Geological Society: Web site: http://www.nebraskageologicalsociety.org Sponsors of a $50 award to the outstanding student paper presented at the Nebraska Academy of SciencesAnnual Meeting, Earth Science /Nebraska Chapter, National Council Sections

6.Nebraska Graduate Women in Science

7.Nebraska Junior Academy of Sciences: Web site: http://www.nebraskajunioracademyofsciences.org/

8.Nebraska Ornithologists’ Union: Web site: http://www.noubirds.org/

9.Nebraska Psychological Association: http://www.nebpsych.org/

10.Nebraska-Southeast South Dakota Section Mathematical …

Occurrence And Potential Transformation Pathways Of Nitrogen Species In The Intermediate Vadose Zone, Jordan Shields

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

Nebraska is a large agricultural producing state with a heavy reliance on groundwater resources and nitrogen fertilizer application to maintain output. Poor management, such as excessive fertilizer application, improper timing, and over irrigation can lead to contamination of groundwater. Nitrate is the leading groundwater contaminant in Nebraska and chronic consumption at medium to high concentrations leads to adverse health effects. Nitrate, a highly soluble anion, is present in the root zone in numerous forms and undergoes biogeochemical transformations before being leached through the profile. In order to predict the timing and quantity of nitrate contamination in groundwater, researchers study the …

Hazardous Weather Communication En Español: Challenges, Current Resources, And Future Practices, Joseph E. Trujillo-Falcón, Orlando Bermúdez, Krizia Negrón-Hernández, John Lipski, Elizabeth Leitman, Kodi Berry

NOAA Technical Reports and Related Materials

According to recent Census data, the Hispanic or Latino population represents nearly 1 in 5 Americans today, where 71.1% of these individuals speak Spanish at home. Despite increased efforts among the weather enterprise, establishing effective risk communication strategies for Spanish-speaking populations has been an uphill battle. No frameworks exist for translating weather information into the Spanish language, nor are there collective solutions that address this problem within the weather world. The objective of this article is threefold. First, the current translation issue in Spanish is highlighted. Through research conducted at the NOAA/NWS Storm Prediction Center, situations are revealed where regional …

Stemendously Fun Time Stem Club, Sarah Altman, Rhiannon Carlile

Honors Expanded Learning Clubs

After school club for middle school students which focuses on bolstering scientific knowledge though experimentation and exploration of the scientific method.

Free Semigroupoid Algebras From Categories Of Paths, Juliana Bukoski

Department of Mathematics: Dissertations, Theses, and Student Research

Given a directed graph G, we can define a Hilbert space H_G with basis indexed by the path space of the graph, then represent the vertices of the graph as projections on H_G and the edges of the graph as partial isometries on H_G. The weak operator topology closed algebra generated by these projections and partial isometries is called the free semigroupoid algebra for G. Kribs and Power showed that these algebras are reflexive, and that they are semisimple if and only if each path in the graph lies on a cycle. We extend …

Gauge-Invariant Uniqueness And Reductions Of Ordered Groups, Robert Huben

Department of Mathematics: Dissertations, Theses, and Student Research

A reduction φ of an ordered group (G,P) to another ordered group is an order homomorphism which maps each interval [1, p] bijectively onto [1, φ(p)]. We show that if (G,P) is weakly quasi-lattice ordered and reduces to an amenable ordered group, then there is a gauge-invariant uniqueness theorem for P -graph algebras. We also consider the class of ordered groups which reduce to an amenable ordered group, and show this class contains all amenable ordered groups and is closed under direct products, free products, and hereditary subgroups.

Adviser: Mark Brittenham and David Pitts

Bibliometric Analysis Of Named Entity Recognition For Chemoinformatics And Biomedical Information Extraction Of Ovarian Cancer, Vijayshri Khedkar, Charlotte Fernandes, Devshi Desai, Mansi R, Gurunath Chavan Dr, Sonali Tidke Dr., M. Karthikeyan Dr.

Library Philosophy and Practice (e-journal)

With the massive amount of data that has been generated in the form of unstructured text documents, Biomedical Named Entity Recognition (BioNER) is becoming increasingly important in the field of biomedical research. Since currently there does not exist any automatic archiving of the obtained results, a lot of this information remains hidden in the textual details and is not easily accessible for further analysis. Hence, text mining methods and natural language processing techniques are used for the extraction of information from such publications.Named entity recognition, is a subtask that comes under information extraction that focuses on finding and categorizing specific …

Best Practices In Industry And Cse Senior Design, Conner Hallett

Honors Theses

The widespread use of Agile practices in the software development industry creates the need for new college graduates to be adept in Agile processes and teams. The University of Nebraska-Lincoln’s Computer Science and Engineering (CSE) Senior Design courses gives students an introduction to such processes, but is met with many challenges in doing so, such as time constraints and student inexperience. Following a detailed look at the Scrum Agile framework and its expanded practices in industry, potential improvements for CSE Senior Design’s practice of Agile are suggested. These include the creation of resource forums for students to accelerate the early …

Unprecedented Migratory Bird Die-Off: A Citizen-Based Analysis On The Spatiotemporal Patterns Of Mass Mortality Events In The Western United States, Di Yang, Anni Yang, Jue Yang, Rongting Xu, Han Qiu

United States Department of Agriculture Wildlife Services: Staff Publications

Extensive, severe wildfires, and wildfire-induced smoke occurred across the western and central United States since August 2020. Wildfires resulting in the loss of habitats and emission of particulate matter and volatile organic compounds pose serious threatens to wildlife and human populations, especially for avian species, the respiratory system of which are sensitive to air pollutions. At the same time, the extreme weather (e.g., snowstorms) in late summer may also impact bird migration by cutting off their food supply and promoting their migration before they were physiologically ready. In this study, we investigated the environmental drivers of massive bird die-offs by …

Observational And Modeling Analysis Of Land-Atmosphere Interactions Over Adjacent Irrigated And Rainfed Cropland During The Grainex Field Campaign., Eric Rappin, Rezaul Mahmood, Udaysankar S. Nair, Roger A. Pielke Sr.

School of Natural Resources: Faculty Publications

Continued scientific study has revealed that land use and land cover change play a key role in climate and that the application of irrigation is an important biogeophysical contributor to climate modification across spatial scales. The Great Plains Irrigation Experiment (GRAINEX) was conducted in the spring and summer of 2018 to investigate Land-Atmosphere interactions just prior to and through the growing season across adjacent, but distinctly unique, soil moisture regimes (contrasting irrigated and rainfed fields). GRAINEX was uniquely designed for the development and analysis of an extensive observational dataset for comprehensive process studies of Land-Atmosphere interactions, by focusing on irrigated …

Forecasting Of The Covid-19 Epidemic: A Scientometric Analysis, Pandri Ferdias, Ansari Saleh Ahmar

Library Philosophy and Practice (e-journal)

This study presented a scientometric analysis of scientific publications with discussions of forecasting and COVID-19. The data of this study were obtained from the Scopus database using the keywords: ( TITLE-ABS-KEY (forecast) AND TITLE-ABS-KEY (covid)) and the data were taken on March 26, 2021. This study was a scientometric study. The data were subsequently analyzed using the VosViewer and Bibliometrix R Package. The results showed that “COVID-19” was the keyword most frequently used by researchers, followed by “forecasting” and “human”. Authors who discussed the topic of forecasting COVID-19 come from 83 different countries/regions, with the most articles sent by authors …

Molecular Design Of Three-Dimensional Metal-Free A(Nh4)X3 Perovskites For Photovoltaic Applications, Jie Bie, Dai-Bei Yang, Ming-Gang Ju, Qiang Pan, Yu-Meng You, Wei Fa, Xiao Cheng Zeng, Shuang Chen

Xiao Cheng Zeng Publications

The intense research activities on the hybrid organic−inorganic perovskites (HOIPs) have led to the greatly improved light absorbers for solar cells with high power conversion efficiency (PCE). However, it is still challenging to find an alternative lead-free perovskite to replace the organohalide lead perovskites to achieve high PCE. This is because both previous experimental and theoretical investigations have shown that the Pb²⁺ cations play a dominating role in contributing the desirable frontier electronic bands of the HOIPs for light absorbing. Recent advances in the chemical synthesis of three-dimensional (3D) metal-free perovskites, by replacing Pb²⁺ with NH₄^{+ …}

Exploring Viirs Continuity With Modis In An Expedited Capability For Monitoring Drought-Related Vegetation Conditions, Trenton D. Benedict, Jesslyn F. Brown, Stephen P. Boyte, Daniel M. Howard, Brian A. Fuchs, Brian D. Wardlow, Tsegaye Tadesse, Kirk A. Evenson

Drought Mitigation Center: Faculty Publications

Vegetation has been effectively monitored using remote sensing time-series vegetation index (VI) data for several decades. Drought monitoring has been a common application with algorithms tuned to capturing anomalous temporal and spatial vegetation patterns. Drought stress models, such as the Vegetation Drought Response Index (VegDRI), often use VIs like the Normalized Difference Vegetation Index (NDVI). The EROS expedited Moderate Resolution Imaging Spectrora-diometer (eMODIS)-based, 7-day NDVI composites are integral to the VegDRI. As MODIS satellite platforms (Terra and Aqua) approach mission end, the Visible Infrared Imaging Radiometer Suite (VIIRS) presents an alternate NDVI source, with daily collection, similar band passes, and …

Exploring Viirs Continuity With Modis In An Expedited Capability For Monitoring Drought-Related Vegetation Conditions, Trenton D. Benedict, Jesslyn F. Brown, Stephen P. Boyte, Daniel M. Howard, Brian A. Fuchs, Brian D. Wardlow, Tsegaye Tadesse, Kirk A. Evenson

Drought Mitigation Center: Faculty Publications

Vegetation has been effectively monitored using remote sensing time-series vegetation index (VI) data for several decades. Drought monitoring has been a common application with algorithms tuned to capturing anomalous temporal and spatial vegetation patterns. Drought stress models, such as the Vegetation Drought Response Index (VegDRI), often use VIs like the Normalized Difference Vegetation Index (NDVI). The EROS expedited Moderate Resolution Imaging Spectrora-diometer (eMODIS)-based, 7-day NDVI composites are integral to the VegDRI. As MODIS satellite platforms (Terra and Aqua) approach mission end, the Visible Infrared Imaging Radiometer Suite (VIIRS) presents an alternate NDVI source, with daily collection, similar band passes, and …

On The Bounded Negativity Conjecture And Singular Plane Curves, Alexandru Dimca, Brian Harbourne, Gabriel Sticlaru

Department of Mathematics: Faculty Publications

There are no known failures of Bounded Negativity in characteristic 0. In the light of recent work showing the Bounded Negativity Conjecture fails in positive characteristics for rational surfaces, we propose new characteristic free conjectures as a replacement. We also develop bounds on numerical characteristics of curves constraining their negativity. For example, we show that the H-constant of a rational curve C with at most 9 singular points satisfies H(C) > -2 regardless of the characteristic.

Holocene Records Of Nebraska Mammals, Hugh H. Genoways

Zea E-Books Collection

A survey of the archeological and paleontological literature allowed a compilation of Holocene records of mammals in Nebraska. This survey identified Holocene records from 338 sites in 62 of the 93 Nebraska counties. These counties were located throughout state, but there was a concentration of sites in southwestern Nebraska where there were 27 fossil sites in Frontier County and 22 in Harlan County. Fossils sites were underrepresented in the Sand Hills region. Records of fossil mammals covered the entire Holocene period from 13,000 years ago until AD 1850. A minimum of 57 species (with eight additional species potentially present) representing …

Assessment Of Water Availability In The Osage Nation Using An Integrated Hydrologic-Flow Model, Jonathan (Jp) Traylor, Shana L. Mashburn, Randall T. Hanson, Steven M. Peterson

United States Geological Survey: Water Reports and Publications

Document abstract

The Osage Nation of northeastern Oklahoma, conterminous with Osage County, covers about 2,900 square miles. The area is primarily rural with 62 percent of the land being native prairie grass, and much of the area is used for cattle ranching and extraction of petroleum and natural gas. Protection of water rights are important to the Osage Nation because of its reliance on cattle ranching and the potential for impairment of water quality by petroleum extraction. Additionally, the potential for future population increases, demands for water from neighboring areas such as the Tulsa metropolitan area, and expansion of petroleum …