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Articles 1 - 9 of 9
Full-Text Articles in Physical Sciences and Mathematics
How Unusual Is Tropical Storm Irene? A Case Study Of Storm Deposition In Littleville Lake, Huntington, Ma, Catherine Dunn
How Unusual Is Tropical Storm Irene? A Case Study Of Storm Deposition In Littleville Lake, Huntington, Ma, Catherine Dunn
Honors Papers
Tropical Storm Irene hit the northeastern United States in August 2011 with impressive rates of precipitation and river discharge. However, it was the combination of this heavy rain with high antecedent soil moisture that made Irene so unusual. The Connecticut River had a particularly high sediment yield after the storm, with a sediment concentration over 1,000 mg/L at the mouth of the river. Littleville Lake on the Westfield River was selected as a study site because of its flood control feature, which allows for the calculation of trapping efficiency in dammed rivers. Coring in the lake showed that there was …
Polarization Analyzed Small Angle Neutron Scattering Of Ferrite Nanoparticles, Kathryn Hasz
Polarization Analyzed Small Angle Neutron Scattering Of Ferrite Nanoparticles, Kathryn Hasz
Honors Papers
Ferromagnetic nanoparticles offer a range of possible applications in nanotechnology, biomedical practices, and data storage, but important issues exist regarding their true magnetic structure. We have been investigating 9 nm diameter Fe3O4 nanoparticles and 11 nm diameter CoFe2O4 nanoparticles coated with an oleic acid shell. The nanoparticles were synthesized by solution chemistry methods and characterized by X-ray diffraction, SQUID, and vibrating sample magnetometry. Polarization Analyzed Small Angle Neutron Scattering (PASANS) was used under various temperatures and applied magnetic fields to investigate the magnetic structure of the particles. PASANS has revealed the iron oxide particles have a canted magnetic shell in …
The One Place We're Trying To Get To Is Just Where We Can't Get: Algebraic Speciality And Gravito-Electromagnetism In Bianchi Type Ix, Benjamin Kurt Lemberger
The One Place We're Trying To Get To Is Just Where We Can't Get: Algebraic Speciality And Gravito-Electromagnetism In Bianchi Type Ix, Benjamin Kurt Lemberger
Honors Papers
Einstein's theory of General Relativity, put forward in 1915, predicts that space and time do not form a fixed background, but instead are malleable and dynamic quantities themselves. Their union forms something called spacetime, which when curved causes gravitational effects. This framework has led to models of the universe which match observations that the entire universe is expanding. Running these models backwards in time leads to a 'big bang', which is a single point from which the entire known universe came from. This single point is a singularity, a place where the theory breaks down, rendering questions like 'what happened …
Low-Temperature Deformation Of Mixed Siliciclastic & Carbonate Fault Rocks Of The Copper Creek, Hunter Valley, And Mcconnell Thrusts, Jack R. Hoehn
Low-Temperature Deformation Of Mixed Siliciclastic & Carbonate Fault Rocks Of The Copper Creek, Hunter Valley, And Mcconnell Thrusts, Jack R. Hoehn
Honors Papers
This study analyzes the low-temperature deformation of fault rocks associated thrust faults. Each fault has dominantly carbonate rocks in one wall and dominantly siliciclastic rocks in the other. The rocks from the Hunter Valley and Copper Creek thrusts of the Southern Appalachians, and McConnell thrust of the Canadian Rockies, were analyzed using data extracted at the thin section and SEM scale. The rocks, all of which featured a fine-grained carbonate matrix surrounding larger carbonate and siliciclastic carbonates, all experienced general shearing, but deformed by different deformation mechanisms. The Hunter Valley and McConnell samples showed evidence of cataclasis, diffusive mass transfer, …
The Effect Of Rainfall And Post-Revolutionary Land-Use Changes On Sediment Yield In Weixi Basin, Yunnan, China : New Insights From Multi-Temporal Land-Use Classification And Radionuclide Analyses, Yue Qiu
Honors Papers
This paper looks at the dynamic interphase connecting post-revolutionary politics, modern land use practices, precipitation patterns, basin slope, and sediment yield records in Weixi basin, a small mountainous watershed in Southwestern China with a total upstream area of 198 m2. The goal is to identify what processes, climatic or not, account for the changes in local sediment yield and erosion budget. Weixi basin has an average annual sediment yield of 175 ton/km2 with two anomalously large peaks in 1979 and 1984. Precipitation is moderately correlated with sediment yield at interannual scale. It also affects seasonal fluctuations in sediment yield as …
Overtone Spectroscopy Of Hydrogen In Mof-5, Jocienne N. Nelson
Overtone Spectroscopy Of Hydrogen In Mof-5, Jocienne N. Nelson
Honors Papers
Metal-Organic Frameworks, or MOFs, are an exciting class of nanoporous crystalline materials with applications that include hydrogen storage and hydrogen isotope separation. The dynamics of adsorbed molecular hydrogen in the prototypical material known as MOF-5 have previously been studied using infrared spectroscopy. However, the rovibrational spectrum of the isotopologues, HD, and D2 were obscured due to overlap with the MOF peaks. Overtone infrared spectroscopy in conjunction with a diffuse reflectance geometry is used to observe the spectrum of H2, HD and D2. The overtone spectrum is shown to facilitate the identification of hydrogen peaks. Further, the spectrum of trapped H2 …
Inverted Linear Halbach Array For Separation Of Magnetic Nanoparticles, Chetan Poudel
Inverted Linear Halbach Array For Separation Of Magnetic Nanoparticles, Chetan Poudel
Honors Papers
Magnetic nanoparticles have unique physical and chemical properties, making them appealing candidates for biomedical applications. These applications depend critically on size and magnetic uniformity of the nanoparticles. Unfortunately, very few purification methods exist to sort nanoparticles based on their magnetic properties. Here, we describe an unusual approach to this problem through our construction of a device containing a linear array of permanent magnets in a Halbach configuration, where successive magnet blocks have their magnetization orientation at right angles. The array provides a large region of relatively low magnetic field, yet high magnetic field gradient where sorting of nanoparticles based on …
Eclogites And Eclogites: Oxygen Isotope Evidence Of A Shared Subduction Origin For Franciscan Eclogites And Moses Rock Eclogite Xenoliths, William F. Hoover
Eclogites And Eclogites: Oxygen Isotope Evidence Of A Shared Subduction Origin For Franciscan Eclogites And Moses Rock Eclogite Xenoliths, William F. Hoover
Honors Papers
Eclogites can be found in two distinct tectonic settings in the western USA: in the Franciscan Complex as tectonic blocks in a fossil accretionary wedge, and in the Navajo Volcanic Field as xenoliths in diatremes. Intra-crystal oxygen isotope analyses of garnets from these two settings provide important information on the source, composition and timing of fluid interactions in both eclogite settings. Because of the well-documented relationship between Franciscan subduction and the volcanism in the Navajo Volcanic Field, the samples in this study can be directly compared to determine if they share a common origin. The Navajo eclogites in this study …
Full Of Hot Air: Heat Flow At The Medicine Lake Volcano Hot Spot, Modoc County, California, Katrina D. Gelwick
Full Of Hot Air: Heat Flow At The Medicine Lake Volcano Hot Spot, Modoc County, California, Katrina D. Gelwick
Honors Papers
Changes in volcanic hydrothermal systems can shed light on the physical processes associated with volcanic unrest such as changes in an underlying magma body. The U.S. Geological Survey recently implemented an experimental hydrothermal monitoring network throughout the Cascade volcanic arc. Despite being ranked as the 12th highest threat among all Cascade volcanoes, Medicine Lake Volcano in northeastern California is considered under-monitored. The primary hydrothermal-monitoring site at Medicine Lake Volcano is a weak fumarole contained within a small area of heated ground, called the Hot Spot, located near the caldera rim. This study uses data from a survey conducted in August …