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2013

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Articles 1591 - 1620 of 11464

Full-Text Articles in Physical Sciences and Mathematics

The Role Of Weed Control In Profitable Pastures, Scott Flynn, Pat Burch Oct 2013

The Role Of Weed Control In Profitable Pastures, Scott Flynn, Pat Burch

Kentucky Grazing Conference

Pasture weeds compete for resources such as space, water, and nutrients. This competition reduces forage yield which in turn reduces the carrying capacity of a pasture. Although herbicide applications are needed to gain a quick upper hand on weed control most producers are deterred due to cost, the potential loss of pasture legumes, labor, or the belief that herbicide applications are required frequently to keep weed population under control. However, herbicide use in pastures should not be looked at in this manner but instead as an investment that can pay for itself very quickly and easily, and be long-term especially …

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Role Of Legumes In Pastures, Garry D. Lacefield Oct 2013

Role Of Legumes In Pastures, Garry D. Lacefield

Kentucky Grazing Conference

Successful livestock production is dependent on forage programs which supply large quantities of adequate quality, homegrown feed. A major percentage of the feed units for beef (83%) and dairy (61%) cattle come from forages. In addition, forages supply an estimated 91%, 72%, 15% and 99% of the nutrients consumed by sheep and goats, horses, swine and ruminant wildlife, respectively.

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(How I Think About) Kentucky's Pastures: One Of Kentucky's Untapped Resources, Jimmy C. Henning Oct 2013

(How I Think About) Kentucky's Pastures: One Of Kentucky's Untapped Resources, Jimmy C. Henning

Kentucky Grazing Conference

One of the privileges of old(er) age is the prerogative to take liberties with assigned tasks. At the risk of confusing producers and offending more scientifically-current forage scientists, the topic of pasture as an untapped resource presented an opportunity to address task from an unexpected angle. Certainly, Kentucky’s pastures are a resource with untapped potential. But the idea that their value as a resource depends on how we think about them is one worth pursuing.

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Foreword And Kfgc Award Winners [2013], Garry D. Lacefield, Christi L. Forsythe Oct 2013

Foreword And Kfgc Award Winners [2013], Garry D. Lacefield, Christi L. Forsythe

Kentucky Grazing Conference

No abstract provided.

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The Fierce Green Fire: Vol. 4 Issue 6, Wofford College Environmental Studies Program Oct 2013

The Fierce Green Fire: Vol. 4 Issue 6, Wofford College Environmental Studies Program

The Fierce Green Fire

No abstract provided.

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An Evaluation Of Precipitation Climate Datasets In The Ganges-Brahmaputra-Meghna Rivers Basin, James Brenton Oct 2013

An Evaluation Of Precipitation Climate Datasets In The Ganges-Brahmaputra-Meghna Rivers Basin, James Brenton

Von Braun Symposium Student Posters

No abstract provided.

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An Artificial Neural Network Downscaling Of Merra: Mountain Gap Wind Events, Emily Foshee Oct 2013

An Artificial Neural Network Downscaling Of Merra: Mountain Gap Wind Events, Emily Foshee

Von Braun Symposium Student Posters

No abstract provided.

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Archaeological Remote Sensing: Exploring The Past From Space, Kel Markert Oct 2013

Archaeological Remote Sensing: Exploring The Past From Space, Kel Markert

Von Braun Symposium Student Posters

No abstract provided.

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Current-Sheet-Like Structures In Solar Winds And Their Effects On The Solar Wind Mhd Turbulence, Junxiang Hu, Allison Bratcher Oct 2013

Current-Sheet-Like Structures In Solar Winds And Their Effects On The Solar Wind Mhd Turbulence, Junxiang Hu, Allison Bratcher

Von Braun Symposium Student Posters

No abstract provided.

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Damage Assessments Through Satellite Imagery Of April 2011 Tornado In Alabama, Vikalp Mishra Oct 2013

Damage Assessments Through Satellite Imagery Of April 2011 Tornado In Alabama, Vikalp Mishra

Von Braun Symposium Student Posters

No abstract provided.

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Determination Of Vegetative Cover Over Urban Areas Of Huntsville, Alabama Using Satellite Imagery, Ralph Evans Oct 2013

Determination Of Vegetative Cover Over Urban Areas Of Huntsville, Alabama Using Satellite Imagery, Ralph Evans

Von Braun Symposium Student Posters

No abstract provided.

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Energization Of Charged Particles In A Time-Dependent Chaotic Magnetic Field, Xiaocan Li Oct 2013

Energization Of Charged Particles In A Time-Dependent Chaotic Magnetic Field, Xiaocan Li

Von Braun Symposium Student Posters

No abstract provided.

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Design Reference Space Radiation Environments For Spacecraft Design And Mission Planning, Z Robinson Oct 2013

Design Reference Space Radiation Environments For Spacecraft Design And Mission Planning, Z Robinson

Von Braun Symposium Student Posters

No abstract provided.

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Dynamic Optical Sampling By Cavity Tuning And Its Application In Lidar, Lin Yang, Jinsong Nie, Lingze Duan Oct 2013

Dynamic Optical Sampling By Cavity Tuning And Its Application In Lidar, Lin Yang, Jinsong Nie, Lingze Duan

Von Braun Symposium Student Posters

No abstract provided.

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Extratropical Cyclones In A Changing Climate Regime, Brian Freitag Oct 2013

Extratropical Cyclones In A Changing Climate Regime, Brian Freitag

Von Braun Symposium Student Posters

No abstract provided.

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Method And Implementation Of Absolute Near Cylindrical Wavefront Testing, Ayshah Alatawi Oct 2013

Method And Implementation Of Absolute Near Cylindrical Wavefront Testing, Ayshah Alatawi

Von Braun Symposium Student Posters

No abstract provided.

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Particle Acceleration At Shock Pair, Lulu Zhao Oct 2013

Particle Acceleration At Shock Pair, Lulu Zhao

Von Braun Symposium Student Posters

No abstract provided.

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Hydromagnetic Waves In A Compressed Dipole Field Via Field-Aligned Klein-Gordon Equations, Jinlei Zheng Oct 2013

Hydromagnetic Waves In A Compressed Dipole Field Via Field-Aligned Klein-Gordon Equations, Jinlei Zheng

Von Braun Symposium Student Posters

No abstract provided.

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Remote Sensing Of Aquatic Vegetation And Agricultural Activity In Lake Guntersville, Casey Calamaio, Kel Markert Oct 2013

Remote Sensing Of Aquatic Vegetation And Agricultural Activity In Lake Guntersville, Casey Calamaio, Kel Markert

Von Braun Symposium Student Posters

No abstract provided.

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Southeast Air Quality: A Wildfire And Aerosol Transport Study Using Satellite Remote Sensing, Eric Dobbs, Swatantra Kethireddy, Binita Kc, Jennifer Bell Oct 2013

Southeast Air Quality: A Wildfire And Aerosol Transport Study Using Satellite Remote Sensing, Eric Dobbs, Swatantra Kethireddy, Binita Kc, Jennifer Bell

Von Braun Symposium Student Posters

No abstract provided.

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The Alignment Of The Marshall Grazing Incidence X-Ray Spectrometer (Magixs), Mark Sterrett Oct 2013

The Alignment Of The Marshall Grazing Incidence X-Ray Spectrometer (Magixs), Mark Sterrett

Von Braun Symposium Student Posters

No abstract provided.

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Surface Modification Of Poly(Dimethylsiloxane) With 254 Nm Irradiation:A Comparison Of Functional Groups, Kenya Wallace Oct 2013

Surface Modification Of Poly(Dimethylsiloxane) With 254 Nm Irradiation:A Comparison Of Functional Groups, Kenya Wallace

Von Braun Symposium Student Posters

No abstract provided.

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Validation Of Satellite Digital Elevation Model Data Through Field Measurements To Help Improve Landslide Susceptibility Modeling, Leigh Baggett, Rob Graham, Cameron Kowalski Oct 2013

Validation Of Satellite Digital Elevation Model Data Through Field Measurements To Help Improve Landslide Susceptibility Modeling, Leigh Baggett, Rob Graham, Cameron Kowalski

Von Braun Symposium Student Posters

No abstract provided.

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Wireless Sensor Network: Environmental Applications, Aaron Kaulfus Oct 2013

Wireless Sensor Network: Environmental Applications, Aaron Kaulfus

Von Braun Symposium Student Posters

No abstract provided.

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Using Satellite Data With On Site Measurements To Create Estimates Of Biomass As A Baseline For Future Studies Of Caribbean Pine, Jeanné Le Roux, Kaitlyn Pate, Jonathan Chenault, Robert Rossell Oct 2013

Using Satellite Data With On Site Measurements To Create Estimates Of Biomass As A Baseline For Future Studies Of Caribbean Pine, Jeanné Le Roux, Kaitlyn Pate, Jonathan Chenault, Robert Rossell

Von Braun Symposium Student Posters

No abstract provided.

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The Santa Clara, 2013-10-10, Santa Clara University Oct 2013

The Santa Clara, 2013-10-10, Santa Clara University

The Santa Clara

No abstract provided.

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Flexiterm: A Flexible Term Recognition Method, Irena Spasić, Mark Greenwood, Alun Preece, Nick Francis, Glyn Elwyn Oct 2013

Flexiterm: A Flexible Term Recognition Method, Irena Spasić, Mark Greenwood, Alun Preece, Nick Francis, Glyn Elwyn

Dartmouth Scholarship

Background: The increasing amount of textual information in biomedicine requires effective term recognition methods to identify textual representations of domain-specific concepts as the first step toward automating its semantic interpretation. The dictionary look-up approaches may not always be suitable for dynamic domains such as biomedicine or the newly emerging types of media such as patient blogs, the main obstacles being the use of non-standardised terminology and high degree of term variation.

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X-Ray Nuclear Activity In S4g Barred Galaxies: No Link Between Bar Strength And Co-Occurrent Supermassive Black Hole Fueling, Mauricio Cristernas, Trisha Mizusawa Oct 2013

X-Ray Nuclear Activity In S4g Barred Galaxies: No Link Between Bar Strength And Co-Occurrent Supermassive Black Hole Fueling, Mauricio Cristernas, Trisha Mizusawa

Aerospace, Physics, and Space Science Faculty Publications

Stellar bars can lead to gas inflow toward the center of a galaxy and stimulate nuclear star formation. However, there is no compelling evidence on whether they also feed a central supermassive black hole: by measuring the fractions of barred active and inactive galaxies, previous studies have yielded conflicting results. In this paper, we aim to understand the lack of observational evidence for bar-driven active galactic nucleus (AGN) activity by studying a sample of 41 nearby (d < 35 Mpc) barred galaxies from the Spitzer Survey for Stellar Structure in Galaxies. We use Chandra observations to measure nuclear 2–10 keV X-ray luminosities and estimate Eddington ratios, together with Spitzer 3.6 μm imaging to quantify the strength of the stellar bar in two independent ways: (1) from its structure, as traced by its ellipticity and boxiness, and (2) from its gravitational torque Qb, taken as the maximum ratio of the tangential force to the mean background radial force. In this way, rather than discretizing the presence of both stellar bars and nuclear activity, we are able to account for the continuum of bar strengths and degrees of AGN activity. We find nuclear X-ray sources in 31 out of 41 galaxies with median X-ray luminosity and Eddington ratio of LX = 4.3×1038 erg s−1 and Lbol/LEdd = 6.9×10−6, respectively, consistent with low-luminosity AGN activity. Including upper limits for those galaxies without nuclear detections, we find no significant correlation between any of the bar strength indicators and the degree of nuclear activity, irrespective of galaxy luminosity, stellar mass, Hubble type, or bulge size. Strong bars do not favor brighter or more efficient nuclear activity, implying that at least for the low-luminosity regime, supermassive black hole fueling is not closely connected to large-scale features.

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Combining Observations And Numerical Model Results To Improve Estimates Of Hypoxic Volume Within The Chesapeake Bay, A. Bever, M. Friedrichs, C. Friedrichs, M. Scully Oct 2013

Combining Observations And Numerical Model Results To Improve Estimates Of Hypoxic Volume Within The Chesapeake Bay, A. Bever, M. Friedrichs, C. Friedrichs, M. Scully

Presentations

No abstract provided.

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Interactive Focus+Context Glyph And Streamline Vector Visualization, Joshua Joseph Anghel Oct 2013

Interactive Focus+Context Glyph And Streamline Vector Visualization, Joshua Joseph Anghel

Boise State University Theses and Dissertations

With data sets growing in size, more efficient methods of visualizing and analyzing data are required. A user can become overwhelmed if too much data is displayed at once and be distracted from identifying potentially important features. This thesis presents methods for focus+context visualization of vector fields. Users can interact with the data in real time to choose which regions should have more emphasis through a mouse or touch interface. Streamlines and hedgehog based visualizations are used to provide focus+context to vector visualizations. The presented visualization methods are shown to be more computationally efficient and are shown to scale well …

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