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2009

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Full-Text Articles in Physical Sciences and Mathematics

Location-Based Services: A Vehicle For It&T Convergence , Katina Michael Mar 2009

Location-Based Services: A Vehicle For It&T Convergence , Katina Michael

Professor Katina Michael

Location-based services (LBS), more than any other mobile commerce application area has served to bring together information technology and telecommunications (IT&T) industries. While much has been written on the potential of LBS, literature on how it is a catalyst for digital convergence is scant. This paper identifies and explores the various levels of converging technologies in mobile commerce by using three LBS case studies. Through literal replication the findings indicate that IT&T technologies are converging at the infrastructure, appliance and application level. It is predicted that mCommerce applications will increasingly rely on industry convergence to achieve their desired outcomes.


The Transit Light Curve Project. X. A Christmas Transit Of Hd 17156b, Joshua N. Winn, Matthew J. Holman, Gregory W. Henry, Guillermo Torres, Debra A. Fischer, John Asher Johnson, Geoffrey W. Marcy, Avi Shporer, Tsevi Mazeh Mar 2009

The Transit Light Curve Project. X. A Christmas Transit Of Hd 17156b, Joshua N. Winn, Matthew J. Holman, Gregory W. Henry, Guillermo Torres, Debra A. Fischer, John Asher Johnson, Geoffrey W. Marcy, Avi Shporer, Tsevi Mazeh

Information Systems and Engineering Management Research Publications

Photometry is presented of the 2007 December 25 transit of HD 17156b, which has the longest orbital period and highest orbital eccentricity of all the known transiting exoplanets. New measurements of the stellar radial velocity are also presented. All the data are combined and integrated with stellar-evolutionary modeling to derive refined system parameters. The planet's mass and radius are found to be 3.212+0.069−0.082 MJup and 1.023+0.070−0.055 RJup. The corresponding stellar properties are 1.263+0.035−0.047 M☉ and 1.446+0.099−0.067 R☉. The planet is smaller by 1σ than a theoretical solar-composition gas giant with the same mass and equilibrium temperature, a possible indication of …


Hubble Space Telescope Morphologies Of Z ~ 2 Dust Obscured Galaxies. I. Power-Law Sources, R.S. Bussman, Arjun Dey, J. Lotz, Lee Armus, Kate Brand, Michael J. I. Brown, Vandana Desai, Peter Eisenhardt, James L. Higdon, Sarah J.U. Higdon, B. T. Jannuzi, Emeric Le Floc'h, J. Melbourne, B. T. Soifer, Daniel Weedman Mar 2009

Hubble Space Telescope Morphologies Of Z ~ 2 Dust Obscured Galaxies. I. Power-Law Sources, R.S. Bussman, Arjun Dey, J. Lotz, Lee Armus, Kate Brand, Michael J. I. Brown, Vandana Desai, Peter Eisenhardt, James L. Higdon, Sarah J.U. Higdon, B. T. Jannuzi, Emeric Le Floc'h, J. Melbourne, B. T. Soifer, Daniel Weedman

Department of Physics and Astronomy Faculty Publications

We present high spatial resolution optical and near-infrared imaging obtained using the ACS, WFPC2 and NICMOS cameras aboard the Hubble Space Telescope of 31 24µm–bright z ≈ 2 Dust Obscured Galaxies (DOGs) identified in the Bo¨otes Field of the NOAO Deep Wide-Field Survey. Although this subset of DOGs have mid-IR spectral energy distributions dominated by a power-law component suggestive of an AGN, all but one of the galaxies are spatially extended and not dominated by an unresolved component at rest-frame UV or optical wavelengths. The observed V − H and I − H colors of the extended components are 0.2−3 …


Poster Session, Kentucky Water Resources Research Institute, University Of Kentucky Mar 2009

Poster Session, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

  • Kentucky Agriculture Water Quality Act Web Tool, Amanda Gumbert, UK Cooperative Extension Service
  • Cane Run Watershed Council – An Adventure in Watershed Involvement, Amanda Gumbert, UK Cooperative Extension Service
  • Preliminary Comparison of Nutrient and Total Suspended Sediment Data on Water Samples Collected using Teledyne Portable Autosampler and EPA Field Methods for Wadeable Streams, Susan Brown, April Haight and others, Institute for Regional Analysis and Public Policy, Morehead State University
  • Groundwater Protection Plans, Patricia Keefe, Kentucky Division of Water
  • Use of Geophysical Techniques to Locate a Karst Conduit in the Cane Run – Royal Spring Basin, Kentucky …


Session 2d, Kentucky Water Resources Research Institute, University Of Kentucky Mar 2009

Session 2d, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

  • The Warren County Blueways Initiative, Steve Spencer, Kevin Cary, and Tammy Stenger-Ramsey, Western Kentucky University
  • The Big Sandy “Big Dip”: Effectiveness of a Community-Oriented and Geographically Intensive Approach to Assessing Small Headwater Stream Health, Reagan Weaver and Alice Jones, Environmental Research Institute, EKU
  • Sanitation District Management of Replaced/Repaired Individual and Clustered Wastewater Treatment Systems in Olympia, Kentucky, Celia Barker, Bath County Health Dept, Jeffrey Brittingham and Barry Tonning, Tetra Tech
  • Assessment of Combined Sewer Overflows, Elizabeth Coyle, Kentucky Water Resources Research Institute, UK


Session 2c, Kentucky Water Resources Research Institute, University Of Kentucky Mar 2009

Session 2c, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

  • Western Kentucky Deep Saline Reservoir CO2 Storage Test, David Williams and J. Richard Bowersox, Kentucky Geological Survey, UK
  • Western Kentucky Deep Saline Reservoir CO2 Storage Test: Preliminary Environmental Assessments and Monitoring, E. Glynn Beck, Thomas Parris, and David Williams, Kentucky Geological Survey, UK
  • Arsenite Oxidation by a Chemostat Culture of Thiomonas Arsenivorans Strain B6, Aniruddha Dastidar and Yi-Tin Wang, Dept Civil Engineering, UK
  • Biological Control of Manganese in Water Supplies – A New Mn(II)-Oxidizing Bacteria Isolate, Michael Snyder and Y.T. Wang, Dept Civil Engineering, UK


Session 2b, Kentucky Water Resources Research Institute, University Of Kentucky Mar 2009

Session 2b, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

  • Watershed Based Planning in the Upper East Fork of Clarks River, Maggie Morgan, Four Rivers Basin Team, Paul Maron, Strand Associates, Inc
  • Kentucky Institute for Watershed Management Support, Alanna Storey, Jana Fattic, and Andrew Ernest, Center for Water Resource Studies, WKU
  • Overview of TMDL Development for Panther Creek and Long Falls Watersheds in Daviess and McLean Counties, Kentucky, Josh Brewer, Center for Water Resource Studies, WKU
  • Nitrogen Isotopes to Study the Variability of Sediment Transported from a Lowland Watershed in the Bluegrass, Jimmy Fox and others, Dept Civil Engineering, UK


Session 2a, Kentucky Water Resources Research Institute, University Of Kentucky Mar 2009

Session 2a, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

  • Results of a Kentucky Stormwater Survey in MS4 Phase II Regions, Yvonne Meichtry and Julie Gee, Kentucky Transportation Cabinet
  • The Bluegrass Rain Garden Alliance: An Approach to Improving Stormwater Quality for MS4 Communities in Central Kentucky, Brittany Zwicker and Amy Sohner, Bluegrass Rain Garden Alliance
  • Give Your Brain to Science: Resource Materials for Teachers, Dan Carey, Kentucky Geological Survey, UK
  • Integrating Environmental Education in the Curriculum, Kazi Javed and others, Kentucky State University


Session 1d, Kentucky Water Resources Research Institute, University Of Kentucky Mar 2009

Session 1d, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

  • Water/Wastewater Technician Training Institute: The First Year Retrospective, Christal Wade and Andrew Ernest, Center for Water Resource Studies, WKU
  • Water Analysis, Training, Education and Research Services: A ‘Farmer’s Cooperative’ Model for Capacity Development, Andrew Ernest and Jana Fattic, Center for Water Resource Studies, WKU
  • Utilizing a Content Management System for an Emergency Response Network for Water and Wastewater Districts, Karla Andrew, Center for Water Resource Studies, WKU
  • Water Resource Management Capacity Development: A Small Systems Technology Transfer Model, Andrew Ernest, Center for Water Resource Studies, WKU


Session 1c, Kentucky Water Resources Research Institute, University Of Kentucky Mar 2009

Session 1c, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

  • Suspended Sediment in the Dry Creek Watershed, Rowan County, Kentucky, Samuel Williams, Steven Reid, and Christine McMichael, Morehead State University
  • Influence of Eastern Hemlock (Tsuga canadensis) on the Aquatic Biodiversity in Eastern Kentucky, Aric Payne and Sherry Harrel, Dept Biological Sciences, EKU
  • Identification of Human and Animal Fecal Sources in Central Kentucky Watersheds by PCR of 16sDNA Markers from Host-Specific Fecal Anaerobes, Tricia Coakley and others, Environmental Research Training Laboratories (ERTL), UK
  • Investigation of Land-Use Change and Hydrologic Forcing upon Streambank Erosion and In-Stream Sediment Processes Using a Watershed Model and Sediment Tracers, Joseph Russo and …


Session 1b, Kentucky Water Resources Research Institute, University Of Kentucky Mar 2009

Session 1b, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

  • Kohonen Self Organizing Map for Analyzing Rainfall and Inflow Patterns with Indiana Reservoir Sites, Chandra Viswanathan and Nimisha Gupta, Dept Civil Engineering, Purdue University Calumet, Hammond, IN
  • Watershed Clustering Based on Geomorphic and Human Induced Landscape Modifications: A Central Kentucky Example, Brian Lee, Angela Schörgendorfer, and Collin Linebach, College of Agriculture, UK
  • “True Relief”? Asynchronous Topographic Change Detection and Concomitant Land Cover and Hydrologic Implications, Demetrio Zourarakis, Kentucky Division of Geographic Information
  • Cumulative Impacts Assessments for 404 Mining Permits, A Watershed Approach, J. Steven Gardner, Engineering Consulting Services, Inc., Lexington, KY


Session 1a, Kentucky Water Resources Research Institute, University Of Kentucky Mar 2009

Session 1a, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

  • Integrated Surface and Groundwater Quality Assessments in Karst Regions of Kentucky, Robert Blair and Peter Goodmann, Kentucky Division of Water
  • The Karst Potential Index for Kentucky, Progress Report, James Currens, Randall Paylor, and Matthew Crawford, Kentucky Geological Survey, UK
  • DNA Analysis of Fecal Bacteria to Trace Transport of Agricultural Pathogens at Crump’s Cave, KY, Rick Fowler, WATERS Laboratory, WKU
  • Process Water Management (PWM) for Achieving Water Conservation Management (WCM), Cam Metcalf and Tom Wright, Kentucky Pollution Prevention Center, U of L Shelby Campus


Proceedings Of 2009 Kentucky Water Resources Annual Symposium, Kentucky Water Resources Research Institute, University Of Kentucky Mar 2009

Proceedings Of 2009 Kentucky Water Resources Annual Symposium, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

This conference was planned and conducted as part of the state water resources research annual program with the support and collaboration of the Department of the Interior, U.S. Geological Survey and the University of Kentucky Research Foundation, under Grant Agreement Number 06HQGR0087.

The views and conclusions contained in this document and presented at the symposium are those of the abstract authors and presenters and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government or other symposium organizers and sponsors.


The Noctilucent Cloud (Nlc) Display During The Ecoma/Mass Sounding Rocket Flights On 3 August 2007: Morphology On Global To Local Scales, G. Baumgarten, J. Fiedler, K. H. Fricke, M. Gerding, M. Hervig, P. Hoffmann, N. Müller, Pierre-Dominique Pautet, M. Rapp, C. Robert, D. Rusch, C. Von Savigny, W. Singer Mar 2009

The Noctilucent Cloud (Nlc) Display During The Ecoma/Mass Sounding Rocket Flights On 3 August 2007: Morphology On Global To Local Scales, G. Baumgarten, J. Fiedler, K. H. Fricke, M. Gerding, M. Hervig, P. Hoffmann, N. Müller, Pierre-Dominique Pautet, M. Rapp, C. Robert, D. Rusch, C. Von Savigny, W. Singer

Publications

During the ECOMA/MASS rocket campaign large scale NLC/PMC was observed by satellite, lidar and camera from polar to mid latitudes. We examine the observations from different instruments to investigate the morphology of the cloud. Satellite observations show a planetary wave 2 structure. Lidar observations from Kühlungsborn (54° N), Esrange (68° N) and ALOMAR (69° N) show a highly dynamic NLC layer. Under favorable solar illumination the cloud is also observable by ground-based cameras. The cloud was detected by cameras from Trondheim (63° N), Juliusruh (55° N) and Kühlungsborn. We investigate planetary scale morphology and local scale gravity wave structures, important …


A Neutral Network Based Vehicle Classification System For Pervasive Smart Road Security, Naixue Xiong, Jing (Selena) He, Jong Hyuk Park, Donald Cooley Mar 2009

A Neutral Network Based Vehicle Classification System For Pervasive Smart Road Security, Naixue Xiong, Jing (Selena) He, Jong Hyuk Park, Donald Cooley

Faculty Articles

Pervasive smart computing environments make people get accustomed to convenient and secure services. The overall goal of this research is to classify vehicles along the I215 freeway in Salt Lake City, USA. This information will be used to predict future roadway needs and the expected life of a roadway. The classification of vehicles will be performed by a synthesis of multiple sets of features. All feature sets have not yet been determined; however, one such set will be the reduced wavelet transform of the image of a vehicle. In order to use such a feature, it is necessary that the …


Estimation In Time-Delay Modeling Of Insecticide-Induced Mortality, H. T. Banks, John Banks, S. L. Joyner Mar 2009

Estimation In Time-Delay Modeling Of Insecticide-Induced Mortality, H. T. Banks, John Banks, S. L. Joyner

SIAS Faculty Publications

We present a mathematical and statistical computational framework for inverse problems involving delay or hysteretic differential equations. We demonstrate efficacy of the methodology in the context of models for insect maturation and mortality due to insecticide exposure.


Virginia Wetlands Report Vol. 24, No. 1, Virginia Institute Of Marine Science, Center For Coastal Resources Management Mar 2009

Virginia Wetlands Report Vol. 24, No. 1, Virginia Institute Of Marine Science, Center For Coastal Resources Management

Virginia Wetlands Reports

VIMS Advisory 2009/Shifting Sands: Beaches and Dunes


A Semi-Analytical Solution For Transient Streaming Potentials Associated With Confined Aquifer Pumping Tests, B. Malama, A. Revil, K. L. Kuhlman Mar 2009

A Semi-Analytical Solution For Transient Streaming Potentials Associated With Confined Aquifer Pumping Tests, B. Malama, A. Revil, K. L. Kuhlman

Natural Resources Management and Environmental Sciences

We consider the transient streaming potential response due to pumping from a confined aquifer through a fully penetrating line sink. Confined aquifer flow is assumed to occur without fluid leakage from the confining units. However, since confining units are typically clayey, and hence more electrically conductive than the aquifer, they are treated as non-insulating in our three-layer conceptual model. We develop a semi-analytical solution for the transient streaming potentials response of the aquifer and the confining units to pumping of the aquifer. The solution is fitted to field measurements of streaming potentials associated with an aquifer test performed at a …


Implications Of Integrating Test-Driven Development Into Cs1/Cs2 Curricula, Chetan Desai, David S. Janzen, John Clements Mar 2009

Implications Of Integrating Test-Driven Development Into Cs1/Cs2 Curricula, Chetan Desai, David S. Janzen, John Clements

Computer Science and Software Engineering

Many academic and industry professionals have called for more testing in computer science curricula. Test-driven development (TDD) has been proposed as a solution to improve testing in academia. This paper demonstrates how TDD can be integrated into existing course materials without reducing topic coverage. Two controlled experiments were conducted in a CS1/CS2 course in Winter 2008. Following a test-driven learning approach, unit testing was introduced at the beginning of the course and reinforced through example. Results indicate that while student work loads may increase with the incorporation of TDD, students are able to successfully develop unit tests while learning to …


Decentralized Robust Control Of Robot Manipulators With Harmonic Drive Transmission And Application To Modular And Reconfigurable Serial Arms, Z. Li, W. W. Melek, Christopher M. Clark Mar 2009

Decentralized Robust Control Of Robot Manipulators With Harmonic Drive Transmission And Application To Modular And Reconfigurable Serial Arms, Z. Li, W. W. Melek, Christopher M. Clark

Computer Science and Software Engineering

In this paper, we propose a decentralized robust control algorithm for modular and reconfigurable robots (MRRs) based on Lyapunov’s stability analysis and backstepping techniques. In using decentralized control schemes with robot manipulators, each joint is considered as an independent subsystem, and the dynamical effects from the other links and joints are treated as disturbance. However, there exist many uncertainties due to unmodeled dynamics, varying payloads, harmonic drive (HD) compliance, HD complex gear meshing mechanisms, etc. Also, while the reconfigurability of MRRs is advantageous, modifying the configuration will result in changes to the robot dynamics parameters, thereby making it challenging to …


Planning For Success: The Interdisciplinary Approach To Building Bayesian Models, Alex Dekhtyar, Judy Goldsmith, Beth Goldstein, Krol Kevin Mathias, Cynthia Isenhour Mar 2009

Planning For Success: The Interdisciplinary Approach To Building Bayesian Models, Alex Dekhtyar, Judy Goldsmith, Beth Goldstein, Krol Kevin Mathias, Cynthia Isenhour

Computer Science and Software Engineering

This paper describes a process by which anthropologists, computer scientists, and social welfare case managers collaborated to build a stochastic model of welfare advising in Kentucky. In the process of collaboration,the research team rethought the Bayesian network model of Markov decision processes and designed a new knowledge elicitation format. We expect that this model will have wide applicability in other domains.


Charts Data Fusion: Multi-Sensor Imagery Co-Registration, Shachak Pe'eri, Yuri Rzhanov Mar 2009

Charts Data Fusion: Multi-Sensor Imagery Co-Registration, Shachak Pe'eri, Yuri Rzhanov

Center for Coastal and Ocean Mapping

The compact hydrographic airborne rapid total survey (CHARTS) is a USACE sensor system that includes a SHOALS-3000 (3-kHz bathymetric laser and a 20-kHz topographic laser), CASI-1500 hyperspectral scanner, and a DuncanTech (DT)- 4000 digital RGB camera. The datasets produced from each sensor in CHARTS contributes a specific aspect according to its physical capabilities and limitations. Fusion of data products from a multi-sensor collection has the potential to perform a comprehensive survey and to produce tools for geo-analysis, especially for coastal research. A basic requirement in the data fusion is the co-registration between the datasets. Data from GPS/INS was intentionally ignored …


Environmental Response Management Application (Erma) - Web-Based Gis Data Display And Management System For Oil Spill Planning And Environmental Response, Michele Jacobi, Rob Braswell, Amy A. Merten, Nancy E. Kinner, Kurt Schwehr Mar 2009

Environmental Response Management Application (Erma) - Web-Based Gis Data Display And Management System For Oil Spill Planning And Environmental Response, Michele Jacobi, Rob Braswell, Amy A. Merten, Nancy E. Kinner, Kurt Schwehr

Center for Coastal and Ocean Mapping

NOAA’s Office of Response and Restoration (ORR) in a partnership with the University of New Hampshire Coastal Response Research Center (CRRC), is leading an effort to develop an Open Source GIS system that is accessible to both the command post and to assets in the field during a response. The ERMA (Environmental Response Management Application) system is an integrated data management platform that uses MapServer and Open Layers software to combine real-time and static regional geospatial data sets. Data available include: weather and forecasts, ESI maps, IOOS buoys, modeled spill trajectories, real-time tracks of vessels, response plans, navigational charts, bathymetry, …


The Occurrence Of Illicit And Therapeutic Pharmaceuticals In Wastewater Effluent And Surface Waters In Nebraska, Shannon L. Bartelt-Hunt, Daniel D. Snow, Teyona Damon, Johnette Shockley, Kyle Hoagland Mar 2009

The Occurrence Of Illicit And Therapeutic Pharmaceuticals In Wastewater Effluent And Surface Waters In Nebraska, Shannon L. Bartelt-Hunt, Daniel D. Snow, Teyona Damon, Johnette Shockley, Kyle Hoagland

Nebraska Water Center: Faculty Publications

Passive samplers were used to develop semi-quantitative estimates of pharmaceutical concentrations in receiving waters influenced by wastewater effluent. The occurrence and estimated concentration of twenty illicit and therapeutic pharmaceuticals and metabolites in surface waters influenced by wastewater treatment plant (WWTP) discharge and in wastewater effluents in Nebraska were determined using Polar Organic Chemical Integrative Samplers (POCIS). Samplers were installed in rivers upstream and downstream of treated WWTP discharge at four sites and in a discharge canal at a fifth location. Based on differences in estimated concentrations determined from pharmaceuticals recovered from POCIS, WWTP effluent was found to be a significant …


Superconductor-Insulator Transitions In Films Patterned With A Disordered Nanohoneycomb Hole Array, H Q. Nguyen, Shawna M. Hollen, M D. Stewart Jr, Aijun Yin, J Shainline, J M. Xu, J M. Valles Jr. Mar 2009

Superconductor-Insulator Transitions In Films Patterned With A Disordered Nanohoneycomb Hole Array, H Q. Nguyen, Shawna M. Hollen, M D. Stewart Jr, Aijun Yin, J Shainline, J M. Xu, J M. Valles Jr.

Physics & Astronomy

No abstract provided.


High Field Magnetoresistance Peak Near The Superconductor Insulator Transition In Amorphous Bi Films Patterned With A Nanohoneycomb Array Of Holes, Shawna M. Hollen, H Q. Nguyen, M D. Stewart Jr, J Shainline, Aijun Yin, J M. Xu, J M. Valles Jr. Mar 2009

High Field Magnetoresistance Peak Near The Superconductor Insulator Transition In Amorphous Bi Films Patterned With A Nanohoneycomb Array Of Holes, Shawna M. Hollen, H Q. Nguyen, M D. Stewart Jr, J Shainline, Aijun Yin, J M. Xu, J M. Valles Jr.

Physics & Astronomy

No abstract provided.


Retention Of Polarization Signatures In Shg Microscopy Of Scattering Tissues Through Optical Clearing, Oleg Nadiarnykh, Paul J. Campagnola Mar 2009

Retention Of Polarization Signatures In Shg Microscopy Of Scattering Tissues Through Optical Clearing, Oleg Nadiarnykh, Paul J. Campagnola

UCHC Articles - Research

Polarization responses in Second Harmonic Generation (SHG) imaging microscopy are a valuable method to quantify aspects of tissue structure, and may be a means to differentiate normal and diseased tissues. Due to multiple scattering, the polarization data is lost in turbid tissues. Here we investigate if this information can be retained through the use of optical clearing which greatly reduces the scattering coefficient and increases the corresponding mean free path. To this end, we have measured the SHG intensity as a function of laser polarization and the SHG signal anisotropy in murine tendon and striated muscle over a depth range …


Reverse Mathematics, Computability, And Partitions Of Trees, Jennifer Chubb, Jeffry L. Hirst, Timothy H. Mcnicholl Mar 2009

Reverse Mathematics, Computability, And Partitions Of Trees, Jennifer Chubb, Jeffry L. Hirst, Timothy H. Mcnicholl

Mathematics

We examine the reverse mathematics and computability theory of a form of Ramsey’s theorem in which the linear n-tuples of a binary tree are colored.


Evapotranspiration Of Irrigated And Rainfed Maize–Soybean Cropping Systems, Andrew E. Suyker, Shashi Verma Mar 2009

Evapotranspiration Of Irrigated And Rainfed Maize–Soybean Cropping Systems, Andrew E. Suyker, Shashi Verma

School of Natural Resources: Faculty Publications

We have been making year-round measurements of mass and energy exchange in three cropping systems: (a) irrigated continuous maize, (b) irrigated maize–soybean rotation, and (c) rainfed maize–soybean rotation in eastern Nebraska since 2001. In this paper, we present results on evapotranspiration (ET) of these crops for the first 5 years of our study. Growing season ET in the irrigated and rainfed maize averaged 548 and 482 mm, respectively. In irrigated and rainfed soybean, the average growing season ET was 452 and 431 mm, respectively. On average, the maize ET was higher than the soybean ET by 18% for irrigated crops …


Modeling And Simulation Of Coating Growth On Nanofibers, J. Wilder, C. B. Clemons, K. L. Kreider, G. W. Young, Edward A. Evans, G. Zhang Mar 2009

Modeling And Simulation Of Coating Growth On Nanofibers, J. Wilder, C. B. Clemons, K. L. Kreider, G. W. Young, Edward A. Evans, G. Zhang

Chemical, Biomolecular, and Corrosion Engineering Faculty Research

This work presents modeling and simulation results of a procedure to coat nanofibers and core-clad nanostructures with thin film materials using plasma enhanced physical vapor deposition. In the experimental effort that motivates the modeling, electrospun polymer nanofibers are coated with metallic materials under different operating conditions to observe changes in the coating morphology. The modeling effort focuses on linking simple models at the reactor, nanofiber, and atomic levels to form a comprehensive model. Numerical simulations that link the concentration field with the evolution of the coating free surface predict that as the Damkohler number is increased the coating morphology changes …