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Articles 1 - 30 of 208
Full-Text Articles in Physical Sciences and Mathematics
Cover Crop Biomass Production And Water Use In The Central Great Plains, David C. Nielsen, Drew J. Lyon, Gary W. Hergert, Robert K. Higgins, Johnathon D. Holman
Cover Crop Biomass Production And Water Use In The Central Great Plains, David C. Nielsen, Drew J. Lyon, Gary W. Hergert, Robert K. Higgins, Johnathon D. Holman
David C. Nielsen
The water-limited environment of the semiarid Central Great Plains may not produce enough cover crop biomass to generate benefits associated with cover crop use in more humid regions. There have been reports that cover crops grown in mixtures produce more biomass with greater water use efficiency than single-species plantings. This study was conducted to determine differences in cover crop biomass production, water use efficiency, and residue cover between a mixture and single-species plantings. The study was conducted at Akron, CO, and Sidney, NE, during the 2012 and 2013 growing seasons under both rainfed and irrigated conditions. Water use, biomass, and …
The Application And Analysis Of Midas/Gts In Landslide Control, Xiang Tao
The Application And Analysis Of Midas/Gts In Landslide Control, Xiang Tao
Innovative Research Publications IRP India
With the help of Midas/GTS software, we researched the landslide in mountain roads via analysis the force under its deadweight, understood the changes of the stress and strain and displacement of the slope, and analysis its force again that after joint the double-row anti-slide piles to the unstable area, until the slope reach a steady state at last, so as to attain the effect that prevent landslide disaster and deal with landslide event timely.
The Digital Atlas Of Ancient Life: Delivering Information On Paleontology And Biogeography, Jonathan R. Hendricks, Alycia L. Stigall, Bruce S. Lieberman
The Digital Atlas Of Ancient Life: Delivering Information On Paleontology And Biogeography, Jonathan R. Hendricks, Alycia L. Stigall, Bruce S. Lieberman
Jonathan R. Hendricks
No abstract provided.
Soil Chemistry On Watershed 1: 1998 - 2014, Chris E. Johnson
Soil Chemistry On Watershed 1: 1998 - 2014, Chris E. Johnson
Chris E Johnson
No abstract provided.
Preliminary Geophysical Characterization Of The Karst Within A Transverse Glade In The Atlantic Coastal Ridge, Miami-Dade County Florida, Usa, Lee J. Florea, Jeff Ransom, Dallas Hazelton
Preliminary Geophysical Characterization Of The Karst Within A Transverse Glade In The Atlantic Coastal Ridge, Miami-Dade County Florida, Usa, Lee J. Florea, Jeff Ransom, Dallas Hazelton
Lee J Florea, PhD, P.G.
In this paper we present results of two DC Electrical Resistivity Tomography surveys at Deering Estate at Cutler in the Atlantic Coastal Ridge of Miami-Dade County, Florida. This County Natural Area encompasses Deering Glade and hosts one of the largest remaining tropical hardwood-hammock ecosystems in the USA. A canal extension, wetland restoration, and pump station recently constructed at Deering Estate by the South Florida Water Management District is designed to re-hydrate Deering Glade to pre-development conditions thus helping to sustain the hammock ecosystem and reverse trends in salt-water intrusion in this portion of the Biscayne aquifer. For these transects, we …
Simultaneous Determination Of Zinc (Zn), Cadmium (Cd), Lead (Pb) And Copper (Cu) In Blood Using Differential- Pulse Anodic-Stripping Voltammetry, Innovative Research Publications Irp India, A.K. Jaiswal, Srinita Das, Vinod Kumar, Madhuri Gupta, N. Singh
Simultaneous Determination Of Zinc (Zn), Cadmium (Cd), Lead (Pb) And Copper (Cu) In Blood Using Differential- Pulse Anodic-Stripping Voltammetry, Innovative Research Publications Irp India, A.K. Jaiswal, Srinita Das, Vinod Kumar, Madhuri Gupta, N. Singh
Innovative Research Publications IRP India
The salts of Zinc (Zn), Cadmium (Cd), Lead (Pb), Copper (Cu), are of great toxicological importance and can causes poisoning. Therefore quantitative determination of traces of zinc, cadmium, lead, copper, in blood is very essential. Routinely, inductive coupled plasma, atomic absorption spectrometry, graphite furnace atomic absorption spectrometry were used for analysis. An attempt has been made to develop new method for simultaneous determination of traces of zinc, cadmium, lead, copper, in blood done by differential-pulse anodic-stripping voltammetry. Blood was processed by wet digestion method using concentrated nitric acid and sulphuric acid. Determination of zinc, cadmium, lead, copper, was made in …
Changes In Heavy Rainstorm Characteristics With Time And Temperature, Barry A. Palynchuk Phd, Yiping Guo Phd
Changes In Heavy Rainstorm Characteristics With Time And Temperature, Barry A. Palynchuk Phd, Yiping Guo Phd
Barry A. Palynchuk PhD
The effects of climate change upon extreme rainfall is evaluated, based upon the identification of individual storms, and the changes in their statistical parameters and distributions. Those changes will be measured based upon historical time spans, and climatic temperature associated with the events. A brief review and comparison with other research is provided.
Changes In Heavy Rainstorm Characteristics With Time And Temperature - Presentation, Barry A. Palynchuk Phd
Changes In Heavy Rainstorm Characteristics With Time And Temperature - Presentation, Barry A. Palynchuk Phd
Barry A. Palynchuk PhD
The effects of climate change upon extreme rainfall is evaluated, based upon the identification of individual storms, and the changes in their statistical parameters and distributions. Those changes will be measured based upon historical time spans, and climatic temperature associated with the events. A brief review and comparison with other research provided.
Glowing Seashells: Diversity Of Fossilized Coloration Patterns On Coral Reef-Associated Cone Snail (Gastropoda: Conidae) Shells From The Neogene Of The Dominican Republic, Jonathan R. Hendricks
Glowing Seashells: Diversity Of Fossilized Coloration Patterns On Coral Reef-Associated Cone Snail (Gastropoda: Conidae) Shells From The Neogene Of The Dominican Republic, Jonathan R. Hendricks
Jonathan R. Hendricks
The biology of modern Conidae (cone snails)—which includes the hyperdiverse genus Conus—has been intensively studied, but the fossil record of the clade remains poorly understood, particularly within an evolutionary framework. Here, ultraviolet light is used to reveal and characterize the original shell coloration patterns of 28 species of cone snails from three Neogene coral reef-associated deposits from the Cibao Valley, northern Dominican Republic. These fossils come from the upper Miocene Cercado Fm. and lower Pliocene Gurabo Fm., and range in age from about 6.6-4.8 Ma. Comparison of the revealed coloration patterns with those of extant species allow the taxa to …
Wykorzystanie Granulometrii Obrazowej W Klasyfikacji Treści Zdjęć Satelitarnych, Przemysław Kupidura
Wykorzystanie Granulometrii Obrazowej W Klasyfikacji Treści Zdjęć Satelitarnych, Przemysław Kupidura
Przemysław Kupidura
This book presents a new method of classifi cation of satellite images, based on utilisation of granulometric analysis of image texture. The theoretical background of the method and its accuracy, depending on different parameters of granulometric processing and input images, is presented. It is compared to other approaches of satellite image classification. The essence of the method relies on the use of granulometric maps, i.e. images containing information about a local texture in every pixel, additionally to spectral data contained in original multispectral images. One of the main advantages of the proposed method is its multiscality, i.e. a possibility to …
Reviving Brontosaurus Name Because Of Species Differences, Life Throoughout The Precambrian As New Life Theory, Disproof Of Poincare Conjecture Because Meteorites Do Not Need To Map To Asteroid 3 Spheres Can Be From Comets, Planets, Oort Cloud, Kuiper Belt, Manifolds Changing And Moving Do Not Map To Unchanging 3 Spheres And I As Manifold Do Not Want To Be Folded Into 3 Sphere So Poincare Conjecture Disproven, James T. Struck
James T Struck
Three discoveries I made from visiting the Field Museum of Natural History yesterday on Illinois Day 12/6/2015. Brontosaurus as a dinosaur name can be brought back as existing in Wyoming rather than Apatosaurus' Colorado, 5 vertebrae rather than 3 on Apatosaurus, and larger size are enough to argue for a unique species. Yale Professor Marsh had it right when he saw Brontosaurus as different than Apatosaurus; larger size, different location, different bones should revive the Brontosaurus name. Riggs spoke to soon when speaking against Brontosaurus as a separate name. Second discovery, a new theory of life on Earth origin that …
Application Of Colloidal Gas Aphron Suspensions Produced From Sapindus Mukorossi For Arsenic Removal From Contaminated Soil, Soumyadeep Mukhopadhyay Dr, Sumona Mukherjee Ms, Mohd Ali Hashim Dr, Bhaskar Sen Gupta Dr
Application Of Colloidal Gas Aphron Suspensions Produced From Sapindus Mukorossi For Arsenic Removal From Contaminated Soil, Soumyadeep Mukhopadhyay Dr, Sumona Mukherjee Ms, Mohd Ali Hashim Dr, Bhaskar Sen Gupta Dr
Soumyadeep Mukhopadhyay Dr
Colloidal gas aphron dispersions (CGAs) can be described as a system of microbubbles suspended homogenously in a liquid matrix. This work examines the performance of CGAs in comparison to surfactant solutions for washing low levels of arsenic from an iron rich soil. Sodium Dodecyl Sulfate (SDS) and saponin, a biodegradable surfactant, obtained from Sapindus mukorossi or soapnut fruit were used for generating CGAs and solutions for soil washing. Column washing experiments were performed in down-flow and up flow modes at a soil pH of 5 and 6 using varying concentration of SDS and soapnut solutions as well as CGAs. Soapnut …
Anomalous Textures In Porphyritic Granite Of Andhra Pradesh (India), Eric R. Force
Anomalous Textures In Porphyritic Granite Of Andhra Pradesh (India), Eric R. Force
Eric R Force
Apparently perthitic textures of microcline phenocrysts in this rock are not due to exsolution but to deformation. Microscopic fracture planes show no offset, however, and are restricted to feldspar crystals, i.e. absent in quartz. A hypothesis of depth formation is presented, and possible shock origin discussed.
Quantifying The Basal Conditions Of A Mountain Glacier Using A Targeted Full-Waveform Inversion: Bench Glacier, Alaska, Usa, E. Babcock, J. Bradford
Quantifying The Basal Conditions Of A Mountain Glacier Using A Targeted Full-Waveform Inversion: Bench Glacier, Alaska, Usa, E. Babcock, J. Bradford
John H. Bradford
Glacier dynamics are inextricably linked to the basal conditions of glaciers. Seismic reflection methods can image the glacier bed under certain conditions. However, where a seismically thin layer of material is present at the bed, traditional analyses may fail to fully characterize bed properties. We use a targeted full-waveform inversion algorithm to quantify the basal-layer parameters of a mountain glacier: thickness (d), P-wave velocity (α) and density (ρ). We simultaneously invert for the seismic quality factor (Q) of the bulk glacier ice. The inversion seeks to minimize the difference between the data and a one-dimensional reflectivity algorithm using a gradient-based …
A 70 Year History Of Coastal Dune Migration And Beach Erosion Along The Southern Shore Of Lake Michigan, Zoran Kilibarda, Craig Shillinglaw
A 70 Year History Of Coastal Dune Migration And Beach Erosion Along The Southern Shore Of Lake Michigan, Zoran Kilibarda, Craig Shillinglaw
Zoran Kilibarda
A study of aerial photographs from the Indiana Dunes National Lakeshore (adjacent to Michigan City, Indiana, United States of America) revealed that from 1938 to 2008 the Lakeshore’s Mount Baldy dune advanced inland 135 m, at an average rate of 1.9 m/year, while the beach north of the dune receded 98 m, at an average rate of 1.4 m/year. The highest rates of Mount Baldy dune movement (3.3 m/year) occurred concurrently (1965–1973) with highest rates of beach erosion (7.2 m/year). The lowest rates of Mount Baldy dune movement (0.3 m/year) occurred in 1958–1965 period. The highest rates of beach accretion …
The 21st Century Library For Geoscientists, Maxine G. Schmidt
The 21st Century Library For Geoscientists, Maxine G. Schmidt
Maxine G Schmidt
No abstract provided.
Mass And Nutrient Loss In Decaying Hardwood Boles At Hubbard Brook, Chris E. Johnson
Mass And Nutrient Loss In Decaying Hardwood Boles At Hubbard Brook, Chris E. Johnson
Chris E Johnson
No abstract provided.
Microbe-Mineral Relationships And Biogenic Mineral Transformations In Actively Venting Deep-Sea Hydrothermal Sulfide Chimneys, Tzihsuan J. Lin
Microbe-Mineral Relationships And Biogenic Mineral Transformations In Actively Venting Deep-Sea Hydrothermal Sulfide Chimneys, Tzihsuan J. Lin
TZIHSUAN J LIN
This dissertation uses a combination of microbiology, mineralogy, and geochemistry to understand dissimilatory iron reduction in hyperthermophilic archaea and the role and potential impact of these and other vent microorganisms within active deep-sea hydrothermal vent chimneys. The central objective of the dissertation is to determine if mineral composition and chimney type are among the primary determinants of microbial community composition and hyperthermophilic, dissimilatory iron reducer growth, in addition to other environmental factors such as nutrient availability, temperature, pH, and chlorinity. This is done using samples and organisms collected from the Endeavour Segment of the Juan de Fuca Ridge in the …
Is Horizon Sampling More Powerful Than Depth Sampling?, Chris E. Johnson
Is Horizon Sampling More Powerful Than Depth Sampling?, Chris E. Johnson
Chris E Johnson
No abstract provided.
Soil Penetrometer, David A. Bainbridge
Soil Penetrometer, David A. Bainbridge
David A Bainbridge
A simple easy to build impact soil penetrometer can provide very useful information on soil strength. This can be very important for restoration planning and management of soils in agriculture and forestry.
Soil Solarization, David A. Bainbridge
Soil Solarization, David A. Bainbridge
David A Bainbridge
Soil solarization makes use of the energy of the sun to heat soil and kill weeds and pathogens. Single, double, or bubblepack plastic and be used to increase soil temperature. Multiple growth benefits are often realized.
Global Meteorological Drought – Part 1: Probabilistic Monitoring, Will Pozzi
Global Meteorological Drought – Part 1: Probabilistic Monitoring, Will Pozzi
Will Pozzi
Near-real-time drought monitoring can provide decision-makers with valuable information for use in se- veral areas, such as water resources management, or inter- national aid. One of the main constrains of assessing the current drought situation is associated with the lack of re- liable sources of observed precipitation on a global scale available in near-real time. Furthermore, monitoring sys- tems also need a long record of past observations to pro- vide mean climatological conditions. To address these prob- lems, a novel probabilistic drought monitoring methodology based on ECMWF probabilistic forecasts is presented, where probabilistic monthly means of precipitation were derived from …
Changing Climate And The Altitudinal Range Of Avian Malaria In The Hawaiian Islands – An Ongoing Conservation Crisis On The Island Of Kaua`I, Carter T. Atkonson, Ruth B. Utzurrum, Dennis A. Lapointe, Richard J. Camp, Lisa H. Crampton, Jeffrey T. Foster, Thomas W. Giambelluca
Changing Climate And The Altitudinal Range Of Avian Malaria In The Hawaiian Islands – An Ongoing Conservation Crisis On The Island Of Kaua`I, Carter T. Atkonson, Ruth B. Utzurrum, Dennis A. Lapointe, Richard J. Camp, Lisa H. Crampton, Jeffrey T. Foster, Thomas W. Giambelluca
Richard J. Camp
Transmission of avian malaria in the Hawaiian Islands varies across altitudinal gradients and is greatest at elevations below 1500 m where both temperature and moisture are favorable for the sole mosquito vector, Culex quinquefasciatus, and extrinsic sporogonic development of the parasite, Plasmodium relictum. Potential consequences of global warming on this system have been recognized for over a decade with concerns that increases in mean temperatures could lead to expansion of malaria into habitats where cool temperatures currently limit transmission to highly susceptible endemic forest birds. Recent declines in two endangered species on the island of Kaua’i, the ‘Akikiki (Oreomystis bairdi) …
Extreme Localized Exhumation At Syntaxes Initiated By Subduction Geometry, Rebecca Bendick
Extreme Localized Exhumation At Syntaxes Initiated By Subduction Geometry, Rebecca Bendick
Rebecca Bendick
No abstract provided.
Changes In Beach Gravel Lithology Caused By Anthropogenic Activities Along The Southern Coast Of Lake Michigan, Usa, Zoran Kilibarda, Nolan Graves, Melissa Dorton, Richard Dorton
Changes In Beach Gravel Lithology Caused By Anthropogenic Activities Along The Southern Coast Of Lake Michigan, Usa, Zoran Kilibarda, Nolan Graves, Melissa Dorton, Richard Dorton
Zoran Kilibarda
The southern coast of Lake Michigan is the most urbanized and most densely populated area in the Great Lakes region. Development of steel mills, harbors, and municipalities in NW Indiana and in NE Illinois in the last century and a half altered the nearshore environment so much that native beach gravel (>8 mm) now exist only in the exhumed paleo-beach remnants from the Nipissing Phase (~4,500 years ago) of Lake Michigan. Native gravel, collected from paleo-beach remnants at Mount Baldy Dune and Beach House Blowout, contain predominantly beach shingle, very platy siltstones (71–78 %), with secondary crystalline pebbles (18 …
The Role Of Extratropical Cyclones In Shaping Dunes Along Southern And Southeastern Lake Michigan, Brian Yurk, Edward Hansen, Suzzanne Devries-Zimmerman, Zoran Kilibarda, Deanna Van Dijk, Brian Bodenbender, A. Krehel, T. Pennings
The Role Of Extratropical Cyclones In Shaping Dunes Along Southern And Southeastern Lake Michigan, Brian Yurk, Edward Hansen, Suzzanne Devries-Zimmerman, Zoran Kilibarda, Deanna Van Dijk, Brian Bodenbender, A. Krehel, T. Pennings
Zoran Kilibarda
This study investigates the impacts of extratropical cyclones on Lake Michigan dune complexes by integrating fi eld measurements and meteorological data from sites along the southeastern shore. Surface changes and wind velocities were monitored at Hoffmaster State Park, Saugatuck Harbor Natural Area, and Mount Baldy at Indiana Dunes National Lakeshore from October to April in 2010–2011 and 2011–2012. Over 70% of the events with wind speeds at least two standard deviations above the mean were associated with extratropical cyclones. The wind directions depended on the cyclone path, with westerly or southerly components most common. Local conditions moderated the effects of …
Arsenic Removal From Soil With High Iron Content Using A Natural Surfactant And Phosphate, Soumyadeep Mukhopadhyay Dr, Mohd Ali Hashim Dr, Matthew Allen Mr, Bhaskar Sen Gupta Dr
Arsenic Removal From Soil With High Iron Content Using A Natural Surfactant And Phosphate, Soumyadeep Mukhopadhyay Dr, Mohd Ali Hashim Dr, Matthew Allen Mr, Bhaskar Sen Gupta Dr
Soumyadeep Mukhopadhyay Dr
An environment friendly arsenic removal technique from contaminated soil with high iron content has been studied. A natural surfactant extracted from soapnut fruit, phosphate solution and their mixture was used separately as extractants. The mixture was most effective in desorbing arsenic, attaining above 70 % efficiency in the pH range of 4–5. Desorption kinetics followed Elovich model. Micellar solubilization by soapnut and arsenic exchange mechanism by phosphate are the probable mechanisms behind arsenic desorption. Sequential extraction reveals that the mixed soapnut–phosphate system is effective in desorbing arsenic associated with amphoteric–Fe-oxide forms. No chemical change to the wash solutions was observed …
Effects Of Wetting Agents And Approaching Anode On Lead Migration In Electrokinetic Soil Remediation, Yee Sern Ng, Bhaskar Sen Gupta, Mohd Ali Hashim
Effects Of Wetting Agents And Approaching Anode On Lead Migration In Electrokinetic Soil Remediation, Yee Sern Ng, Bhaskar Sen Gupta, Mohd Ali Hashim
Ng Yee-Sern
Approaching anode is one of the enhancement techniques in electrokinetic soil remediation. This technique is reported to give promising migration for heavy metals under shorter treatment time and at lower cost in comparison to normal fixed anode system. In the present study, the effectiveness of fixed anode and approaching anode techniques in electrokinetic soil remediation for lead migration under different types of wetting agents (0.01M NaNO3 and 0.1M citric acid) was investigated. The study showed that the use of citric acid enhanced lead migration in comparison to NaNO3. For NaNO3 tests, lead was found to accumulate in the middle of …
The Probabilistic Characterization Of Severe Rainstorm Events: Applications Of Threshold Analysis To Climate Change Impacts, Barry A. Palynchuk Phd
The Probabilistic Characterization Of Severe Rainstorm Events: Applications Of Threshold Analysis To Climate Change Impacts, Barry A. Palynchuk Phd
Barry A. Palynchuk PhD
A summary of PhD thesis, with emphasis upon storm event definition, and climate change impacts upon rainfall depth, duration, and intensity.
Isotopes Of Carbon In A Karst Aquifer Of The Cumberland Platea Of Kentucky , Usa, Lee J. Florea
Isotopes Of Carbon In A Karst Aquifer Of The Cumberland Platea Of Kentucky , Usa, Lee J. Florea
Lee J Florea, PhD, P.G.
In this study, the concentration and isotopic composition of dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC) are measured in the karst groundwater of the Otter Creek watershed of the Cumberland Plateau of Kentucky, USA. Comparisons among these data and with the geochemistry of carbonate and gypsum equilibrium reactions reveal that DOC concentration is inversely related to discharge, multiple reaction pathways provide DIC with isotopic enrichment that may be directly related to mineral saturation, and oxidation of reduced sulfur is possible for dissolution. DOC is derived from C3 vegetation with an average δ13CDOC of ‒27‰. DIC in groundwater is …