Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Life Sciences (10471)
- Earth Sciences (8243)
- Plant Sciences (7764)
- Soil Science (7667)
- Plant Biology (3115)
-
- Agronomy and Crop Sciences (3105)
- Agricultural Science (3104)
- Plant Pathology (3103)
- Weed Science (3101)
- Environmental Sciences (2831)
- Computer Sciences (1706)
- Engineering (1512)
- Oceanography and Atmospheric Sciences and Meteorology (1063)
- Statistics and Probability (1020)
- Natural Resources and Conservation (903)
- Medicine and Health Sciences (858)
- Marine Biology (827)
- Sustainability (823)
- Fresh Water Studies (819)
- Ecology and Evolutionary Biology (786)
- Physics (771)
- Social and Behavioral Sciences (752)
- Chemistry (658)
- Terrestrial and Aquatic Ecology (655)
- Oil, Gas, and Energy (633)
- Applied Mathematics (626)
- Environmental Monitoring (618)
- Applied Statistics (609)
- Environmental Indicators and Impact Assessment (589)
- Institution
-
- University of Kentucky (8250)
- Western Washington University (872)
- Kennesaw State University (540)
- Kansas State University Libraries (509)
- Virginia Commonwealth University (469)
-
- Utah State University (449)
- University of Nevada, Las Vegas (443)
- Illinois State University (440)
- Clemson University (349)
- Syracuse University (255)
- Purdue University (238)
- Embry-Riddle Aeronautical University (235)
- Western Kentucky University (203)
- University for Business and Technology in Kosovo (195)
- Roseman University of Health Sciences (156)
- Old Dominion University (128)
- Western University (110)
- Institute of Business Administration (104)
- Portland State University (101)
- Montclair State University (96)
- University of South Florida (93)
- Illinois Math and Science Academy (91)
- Stephen F. Austin State University (88)
- University of Nebraska at Omaha (85)
- Murray State University (80)
- Illinois Wesleyan University (75)
- Nova Southeastern University (72)
- Southwestern Oklahoma State University (71)
- Florida International University (66)
- Cedarville University (63)
- Keyword
-
- Grazing (333)
- And Energy; Structural Materials; Sustainability (248)
- Energy Systems; Environmental Indicators and Impact Assessment; Environmental Monitoring; Mining Engineering; Oil (248)
- Gas (248)
- Alfalfa (162)
-
- Grassland (152)
- Forage (139)
- Nitrogen (139)
- Pasture (139)
- Climate change (138)
- Sheep (136)
- Biodiversity (125)
- Cattle (125)
- Forage quality (114)
- Medicine (112)
- Silage (112)
- Yield (111)
- Epidemiology (100)
- Nutritive value (96)
- Digestibility (95)
- Sustainability (94)
- Livestock (93)
- Grasslands (90)
- Legumes (87)
- Grazing management (86)
- Intake (84)
- Perennial ryegrass (84)
- Stocking rate (81)
- Crude protein (78)
- Grass (78)
- Publication Year
- Publication
-
- IGC Proceedings (1993-2023) (7001)
- Salish Sea Ecosystem Conference (810)
- Conference on Applied Statistics in Agriculture (489)
- World of Coal Ash Proceedings (472)
- Biology and Medicine Through Mathematics Conference (469)
-
- Annual Symposium on Biomathematics and Ecology Education and Research (440)
- Kentucky Alfalfa and Stored Forage Conference (382)
- S.C. Water Resources Conference (336)
- C-Day Computing Showcase (307)
- International Building Physics Conference 2018 (255)
- UBT International Conference (195)
- Annual ADFSL Conference on Digital Forensics, Security and Law (191)
- Wildlife Damage Management Conference (189)
- Kentucky Grazing Conference (176)
- Kentucky Water Resources Annual Symposium (175)
- Student Research Symposium (160)
- Annual Research Symposium (156)
- Utah Space Grant Consortium (137)
- Mammoth Cave Research Symposia (132)
- The Summer Undergraduate Research Fellowship (SURF) Symposium (120)
- Symposium of Student Scholars (111)
- Scholars Week (99)
- International Conference on Gambling & Risk Taking (98)
- KSU Proceedings on Cybersecurity Education, Research and Practice (98)
- International Conference on Information and Communication Technologies (93)
- Sustainability Seminar Series (93)
- Cybersecurity Undergraduate Research Showcase (90)
- Undergraduate Research Conference (83)
- Undergraduate Student Research Internships Conference (81)
- John Wesley Powell Student Research Conference (75)
- File Type
Articles 13621 - 13650 of 16660
Full-Text Articles in Physical Sciences and Mathematics
Evaluation Of Metals That Are Potentially Toxic To Agricultural Surface Soils, Using Statistical Analysis, In Northwestern Saudi Arabia, Nassir Al-Arifi
Evaluation Of Metals That Are Potentially Toxic To Agricultural Surface Soils, Using Statistical Analysis, In Northwestern Saudi Arabia, Nassir Al-Arifi
21st International Conference on Environmental Indicators (ICEI 2015)
No abstract provided.
Heavy Metal Contamination Of Soils: Sources, Indicators And Assessment, Zhenli He, Jiali Shentu, Xiaoe Yang, Virupax C. Baligar, Tiequan Zhang, Peter J. Stoffella
Heavy Metal Contamination Of Soils: Sources, Indicators And Assessment, Zhenli He, Jiali Shentu, Xiaoe Yang, Virupax C. Baligar, Tiequan Zhang, Peter J. Stoffella
21st International Conference on Environmental Indicators (ICEI 2015)
No abstract provided.
Managing Eutrophication In The Great Lakes: The Primary Production Story, G. D. Haffner, E. Hillis, M. Fitzpatrick, D. Porta
Managing Eutrophication In The Great Lakes: The Primary Production Story, G. D. Haffner, E. Hillis, M. Fitzpatrick, D. Porta
21st International Conference on Environmental Indicators (ICEI 2015)
No abstract provided.
Quantitative Biomonitoring Of Water Quality For Pops Using Freshwater Mussels, Ken G. Drouillard
Quantitative Biomonitoring Of Water Quality For Pops Using Freshwater Mussels, Ken G. Drouillard
21st International Conference on Environmental Indicators (ICEI 2015)
No abstract provided.
Tale Of Three Estuaries: Comparative Evaluation Of Geochemical And Mineralogical Intertidal Sediments In North Cornwall, Southwest England, T. D.T. Oyedotun
Tale Of Three Estuaries: Comparative Evaluation Of Geochemical And Mineralogical Intertidal Sediments In North Cornwall, Southwest England, T. D.T. Oyedotun
21st International Conference on Environmental Indicators (ICEI 2015)
No abstract provided.
The Phosphorus Paradox: Productive Agricultural And Water Quality, Andrew N. Sharpley
The Phosphorus Paradox: Productive Agricultural And Water Quality, Andrew N. Sharpley
21st International Conference on Environmental Indicators (ICEI 2015)
No abstract provided.
Governance For Environmental Protection Of The Great Lakes: Recovering Nutrients From Greenhouse Post-Production Water, Deanna Nemeth, Shalin Khosla, Greg Devos, Beverly Alder, Dan Mcdonald, Don Hillborn
Governance For Environmental Protection Of The Great Lakes: Recovering Nutrients From Greenhouse Post-Production Water, Deanna Nemeth, Shalin Khosla, Greg Devos, Beverly Alder, Dan Mcdonald, Don Hillborn
21st International Conference on Environmental Indicators (ICEI 2015)
No abstract provided.
Water Stratification Is Key To Forming Algal Bloom In The Backwater Area Of The Three Gorges Reservoir, China, L. Zhang, L. Fu, J. Yu, C. Zhou, D. Haffner
Water Stratification Is Key To Forming Algal Bloom In The Backwater Area Of The Three Gorges Reservoir, China, L. Zhang, L. Fu, J. Yu, C. Zhou, D. Haffner
21st International Conference on Environmental Indicators (ICEI 2015)
No abstract provided.
Using Ecological Indicators To Assess Ecosystem Health In Tropical Reservoirs In Brazil, Juliana Pomari, Douglas Kane, Rosa Antonia Romero Ferreira, Marcos Gomes Nogueira
Using Ecological Indicators To Assess Ecosystem Health In Tropical Reservoirs In Brazil, Juliana Pomari, Douglas Kane, Rosa Antonia Romero Ferreira, Marcos Gomes Nogueira
21st International Conference on Environmental Indicators (ICEI 2015)
No abstract provided.
Colonial Waterbirds As Indicators Of Environmental Change, Craig Hebert
Colonial Waterbirds As Indicators Of Environmental Change, Craig Hebert
21st International Conference on Environmental Indicators (ICEI 2015)
No abstract provided.
Climate Warming Reduces Essential Fatty Acid Production In Algae, Michael T. Arts, Stefanie M. Hixson, Samantha Mercieca
Climate Warming Reduces Essential Fatty Acid Production In Algae, Michael T. Arts, Stefanie M. Hixson, Samantha Mercieca
21st International Conference on Environmental Indicators (ICEI 2015)
No abstract provided.
Using Agri-Environmental Indicators To Communicate Risks To Water Quality From Horticulture Production In Ontario, Donna Speranzini, V. Li, A. Jamieson, P. Handyside, D. K. Reid, P. Joose
Using Agri-Environmental Indicators To Communicate Risks To Water Quality From Horticulture Production In Ontario, Donna Speranzini, V. Li, A. Jamieson, P. Handyside, D. K. Reid, P. Joose
21st International Conference on Environmental Indicators (ICEI 2015)
No abstract provided.
Periphyton Community Dynamics As An Indicator Of Water Quality, C. Chantler, J. Benallick, C. Sinclair, N. Kanavillil
Periphyton Community Dynamics As An Indicator Of Water Quality, C. Chantler, J. Benallick, C. Sinclair, N. Kanavillil
21st International Conference on Environmental Indicators (ICEI 2015)
No abstract provided.
Developing Great Lakes Bioindicators Of Environmental Condition And Recovery From Degradation With Reference To Watershed-Based Risk Of Stress, Jan Ciborowski, Katya Kovalenko, George Host, Robert W. Howe, Euan Reavie, Terry N. Brown, Valerie Brady, Nicholas Danz, Gerald L. Niemi, Cai Meijun, Lucinda B. Johnson
Developing Great Lakes Bioindicators Of Environmental Condition And Recovery From Degradation With Reference To Watershed-Based Risk Of Stress, Jan Ciborowski, Katya Kovalenko, George Host, Robert W. Howe, Euan Reavie, Terry N. Brown, Valerie Brady, Nicholas Danz, Gerald L. Niemi, Cai Meijun, Lucinda B. Johnson
21st International Conference on Environmental Indicators (ICEI 2015)
No abstract provided.
Soil Carbon Pool As An Environmental Indicator, Rattan Lal
Soil Carbon Pool As An Environmental Indicator, Rattan Lal
21st International Conference on Environmental Indicators (ICEI 2015)
No abstract provided.
A High-Altitude Balloon Platform For Determining Regional Uptake Of Carbon Dioxide Over Agricultural Landscapes, Angela M. Bouche
A High-Altitude Balloon Platform For Determining Regional Uptake Of Carbon Dioxide Over Agricultural Landscapes, Angela M. Bouche
2017 Academic High Altitude Conference
Interactions between the biosphere and atmosphere are an important part of the global carbon cycle, and quantifying the carbon dioxide exchanges between them is helpful in predicting the uptake of carbon dioxide from anthropogenic sources by the biosphere in the future. In the Midwestern United States, agricultural systems cover a large part of the landscape, so understanding their role in influencing the global carbon budget is crucial as anthropogenic sources of carbon dioxide grow larger. Carbon dioxide exchanges can be measured by eddy covariance at the ecosystem level (bottom-up approach) or regionally by inversion techniques (top-down approach). Here we describe …
Detecting Cosmic Rays Using Cemos Sensors In Consumer Devices, Matthew M. Plewa
Detecting Cosmic Rays Using Cemos Sensors In Consumer Devices, Matthew M. Plewa
2017 Academic High Altitude Conference
Since the time of Victor Hess and his balloon flight that demonstrated that cosmic rays increased with altitude, new detection methods have become widely available to be used on current day flights. One such method is to utilize CCDs with long duration exposures. During the exposures the CCD is exposed to cosmic rays which then leave a track. This phenomenon is caused by the CCD's inability to distinguish between photons of light and charged particles. Such tracks can then be separated from the CCD's background noise and classified.
Development Of An Integrated Online Balloon Flight System, Ethan E. Harstad
Development Of An Integrated Online Balloon Flight System, Ethan E. Harstad
2017 Academic High Altitude Conference
Aerodyne Labs has been working with the Stratospheric Ballooning Association to develop an all inclusive high altitude ballooning software suite. This software suite is intended to allow every step of conducting a balloon flight to be conducted on a single website. Flight predictions can be performed many days in advance and used to automatically generate notices for both the FAA and public. Once the balloon has been launched, telemetry can be streamed to the website to allow real-time position and telemetry updates, including a dedicated view for FAA controllers. Data that is not streamed from the payload can be uploaded …
Collecting Multiple Data Points In A Thunderstorm Environment, Matthew Nelson
Collecting Multiple Data Points In A Thunderstorm Environment, Matthew Nelson
2017 Academic High Altitude Conference
Collecting multiple data points in adverse conditions such as a thunderstorm presents a number of challenges in collecting and relaying data. Wireless sensor mesh networks is a proven method for extracting and relaying data in radio environments that may either be roving, in adverse conditions or both. This paper explores using wireless sensor mesh networks to collect atmospheric data that is present in a thunderstorm system to enable researchers to learn more from these systems. A wireless sensor mesh network is ideal since it is well suited for both moving and sensor nodes that are in adverse RF conditions. A …
Integrating K12 Outreach With Undergraduate & Graduate Student Research Through Balloonsat: High Altitude Balloons, J Tillman Kennon, Bryant Fong
Integrating K12 Outreach With Undergraduate & Graduate Student Research Through Balloonsat: High Altitude Balloons, J Tillman Kennon, Bryant Fong
2017 Academic High Altitude Conference
The Arkansas BalloonSAT team has successfully launched and recovered 37 BalloonSAT’s dating back to the first flight on December 16, 2006. Numerous instruments measuring such things as atmospheric temperature, humidity, radiation, and light intensity have recorded data from different locations over the State of Arkansas. The initial focus of this project was outreach with the k-12 schools, and still involves outreach; however atmospheric research has become a significant component for this endeavor. This ongoing collaborative projection has involved a number of faculty and students from different academic backgrounds, including physics, chemistry, biology, and astronomy among different ASGC schools who have …
Directional Camera Control On High Altitude Balloons, Matthew M. Plewa, Brent Scharlau
Directional Camera Control On High Altitude Balloons, Matthew M. Plewa, Brent Scharlau
2017 Academic High Altitude Conference
The research reported in this paper examined the design and control of a gimbal for solar eclipse tracking and video recording. The gimbal design required 3 axes of rotation to allow for full range of motion. Utilizing individual brushless motors for each of the axes ensure minimum rotational requirements on each axes. In controlling the gimbal, both a mathematical and visual method were utilized. The mathematical method is a modified version of what is currently used for solar array pointing. The visual method looks at where the position of the sun is within the image and determines what angle changes …
Using Thermocouple, Thermistor, And Digital Sensors To Characterize The Thermal Wake Below Ascending Weather Balloons, Erick Agrimson, Kaye Smith, Rachel Newman, Kassandra Surma, Maggie Singerhouse, Britany Craig, Marilyn Mcnamara, James Flaten, Alex Pratt, Stephanie Wegner, Joe Dillon
Using Thermocouple, Thermistor, And Digital Sensors To Characterize The Thermal Wake Below Ascending Weather Balloons, Erick Agrimson, Kaye Smith, Rachel Newman, Kassandra Surma, Maggie Singerhouse, Britany Craig, Marilyn Mcnamara, James Flaten, Alex Pratt, Stephanie Wegner, Joe Dillon
2017 Academic High Altitude Conference
In this paper we present additional results from our on-going research effort to characterize the thermal wake that trails below ascending latex weather balloons on flights into the stratosphere; a wake which interferes with the ability of temperature sensors in payload boxes hanging from the balloon (and hence enveloped by the wake) to correctly measure the ambient temperature of the atmosphere through which the balloon is ascending. A “wake boom” is used to measure temperature variations up to 1.5 m horizontally from varying distances directly below the neck of the balloon. Results to date agree with the literature that especially …
Techniques For Payload Stabilization For Improved Photography During Stratospheric Balloon Flights, James Flaten, Christopher Gosch, Joseph (Benjamin) Habeck
Techniques For Payload Stabilization For Improved Photography During Stratospheric Balloon Flights, James Flaten, Christopher Gosch, Joseph (Benjamin) Habeck
2017 Academic High Altitude Conference
Payload-box rotation and swing are perennial challenges to achieving high-quality photography (typically videography) during weather-balloon flights to “near-space” (AKA the stratosphere). Continuous camera motion can lead to blurred still photos, nearly-impossible-to-watch video footage, and precludes time-exposure photography required for most astronomical imaging even though altitudes are reached where the daytime sky appears black. Apparently-random payload rotation, persisting even at altitude, can often exceed servo rotation rates and frustrate attempts to do active camera pointing. Here we discuss mostly-passive payload stabilization strategies we, and our collaborators, have used to mitigate and dampen both swing and rotation of suspended payloads on high-altitude …
Building An Undergraduate Cohort In High Altitude Ballooning, Mike Davis
Building An Undergraduate Cohort In High Altitude Ballooning, Mike Davis
2017 Academic High Altitude Conference
City Colleges of Chicago (CCC), in partnership with DePaul University and the Illinois Space Grant Consortium, has recently been awarded a grant from NASA to develop a research and education program in high-altitude ballooning. The project builds on the Chicago Initiative for Research and Recruitment in the Undergraduate Sciences (CIRRUS) model of undergraduate research and community college/four year college collaborative projects, a successful NSF-funded collaboration between DePaul and CCC. The project has four goals: (1) initiate a year-round undergraduate research program to recruit promising community college students into the STEM disciplines, (2) provide tuition support and fellowships to support student …
Nasa Nebraska High Altitude Ballooning And The Fab Lab, Kendra Sibbernsen, Michael Sibbernsen
Nasa Nebraska High Altitude Ballooning And The Fab Lab, Kendra Sibbernsen, Michael Sibbernsen
2017 Academic High Altitude Conference
The NASA Nebraska High Altitude Ballooning (N-NHAB) program has collaborated on projects with the Fab Lab at Metropolitan Community College (MCC) in Omaha, NE. Based on the MIT Center for Bits and Atoms, the Fab Lab contains 3D printers, laser cutters, CNC machines, and much more. In its trial phase, the Fab Lab encouraged projects from the sciences. In response to this request, one of these projects involved a HAB student who wanted to streamline custom circuitry for measuring the efficiency of solar cells. The circuit pathways were designed and precisely cut from a copper sheet and the laser cutter …
2012 Georgia Scholarship Of Stem Teaching And Learning Conference Program, Georgia Scholarship Of Stem Teaching And Learning Conference
2012 Georgia Scholarship Of Stem Teaching And Learning Conference Program, Georgia Scholarship Of Stem Teaching And Learning Conference
Interdisciplinary STEM Teaching & Learning Conference (2012-2019)
Conference Program
The “Stratospheric Cricket Keeper” – Developing A Simple“Life-Support” Payload For High-Altitude Balloon Missions, Lucas Kramer, Chad Serba, James Flaten
The “Stratospheric Cricket Keeper” – Developing A Simple“Life-Support” Payload For High-Altitude Balloon Missions, Lucas Kramer, Chad Serba, James Flaten
2017 Academic High Altitude Conference
Exposure to the environmental conditions of “near-space” (AKA the stratosphere) is quickly fatal to nearly all forms of animal life. It is even challenging to build a sealable enclosure that can keep insects (crickets) alive through the dramatic and simultaneous pressure and temperature drops experienced during a high-altitude balloon mission. This poster describes the development of a rugged “cricket keeper” in which we were able to fly crickets to the stratosphere and, quoting the words of JFK, “return (them) safely to the earth!” This “life-support” payload had large windows (for the view!) and included Arduino-logged temperature and pressure sensors, an …
Cosmic Ray Air Shower Lateral Coincidences, Gordon C. Mcintosh
Cosmic Ray Air Shower Lateral Coincidences, Gordon C. Mcintosh
2017 Academic High Altitude Conference
At the University of Minnesota, Morris, my students and I have begun to investigate the time and altitude dependence of air showers. Air showers are cosmic ray secondaries that spread out laterally around the primary cosmic ray direction. To investigate the air showers we have been measuring the lateral coincidences among three Aware RM60 Geiger counters located at 0 cm, 15 cm, and 40 cm. Most of these measurements have been carried out at the surface. The rate of lateral, triple coincidences of Geiger counter with this configuration is 0.053 ±0.013 hr-1 at the surface. On 4 April 2015 …
Long Term Tropospheric And Stratospheric Measurements Using High Altitude Balloons, Bryant Fong, J Tillman Kennon, Ed Roberts, Hashim Ali
Long Term Tropospheric And Stratospheric Measurements Using High Altitude Balloons, Bryant Fong, J Tillman Kennon, Ed Roberts, Hashim Ali
2017 Academic High Altitude Conference
The Arkansas BalloonSAT program is an educational outreach and research program at Arkansas State University. A variety of instruments including HOBO data loggers, Anasonde, and Arduino methane sensors have been flown on flights in the past five years. Measurements using BalloonSAT provides a cost effective option, while also matching measurements made with satellites and unmanned aerial vehicles. This includes identifying water vapor, pressure, background radiation, methane, carbon dioxide and temperature profiles over seasons and years. Water vapor trends were observed to vary with seasons, with water vapor lowest in the summer and greatest in the spring at stratospheric altitudes. Methane …
Learning To Fly: Initial Experiments In High Altitude Ballooning, Tracy L. Knowles, Dalton Warren, Sara Stewart, Angel Smith, Joe Maciag
Learning To Fly: Initial Experiments In High Altitude Ballooning, Tracy L. Knowles, Dalton Warren, Sara Stewart, Angel Smith, Joe Maciag
2017 Academic High Altitude Conference
The Bluegrass Community and Technical College’s (BCTC) Balloon Sat Project trained students and faculty to design, build, and fly balloon-borne atmospheric data collection payloads. Students and faculty attended NASA’s Balloon Sat four day workshop/Flight at Marshall Space Flight Center in Huntsville, AL. During the Spring 2015 semester, the student team launched two balloons with sensors on board that measured atmospheric temperature, pressure, altitude, humidity, and carbon dioxide concentrations.