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Articles 1 - 25 of 25
Full-Text Articles in Physical Sciences and Mathematics
Pfas Mass Balance, Donovan Vitale
Pfas Mass Balance, Donovan Vitale
Honors Theses
First-generation, PFOS-dominant Aqueous Film Forming Foam (AFFF) concentrate of approximately 200 gallons was released to the sewer system from the Kalamazoo/Battle Creek International Airport on March 30, 2021. The AFFF release migrated to the Kalamazoo Water Reclamation Plant (KWRP), raising plant effluent above the Department of Environment, Great Lakes, and Energy (EGLE) PFOS water quality standard for a total of 46 days post-spill, although the influent concentrations exhibited sharp declines after only 7 days. By sampling influent, effluent, and biosolids daily, the only known long duration, high-frequency PFAS data set of an accidental AFFF release was generated. This study has …
Investigating The Thermodynamics And Seismic Profile Of The Europan Hydrosphere Through Pure-Water Modeling And Saltwater Experiments, Samantha Rosenfeld
Investigating The Thermodynamics And Seismic Profile Of The Europan Hydrosphere Through Pure-Water Modeling And Saltwater Experiments, Samantha Rosenfeld
Honors Theses
We explore the properties of the hydrosphere on Europa involving both a modeling technique and experimental methods. We perform a computational analysis of the thermodynamic properties for an ideal, pure-water Europan ice shell using a Python programming framework called SeaFreeze. We create four models assuming surface temperatures of either 50 K or 140 K and ice shell thicknesses of either 3 km or 30 km. We observe mostly linear trends for the density and seismic wave velocities with respect to depth and find that surface temperature has the greatest effect on the models. Simultaneously, we experimentally investigate the phase diagram …
Fluid Pathways In Magmatic Fluid-Dominated Hydrothermal System: Upper Resurgent Cone, Brothers Volcano, New Zealand, Esther G. Goita
Fluid Pathways In Magmatic Fluid-Dominated Hydrothermal System: Upper Resurgent Cone, Brothers Volcano, New Zealand, Esther G. Goita
Honors Theses
The Tonga-Kermadec Arc is an active volcanic arc located between New Zealand and Fiji. The arc expands over an approximate distance of 2530 km. The Kermadec Arc is currently host to over 30 volcanoes, the majority of which are submarine. The magmatic activity along the arc is characterized by the convergence between the Pacific and Australian plates. Brothers volcano is the most active hydrothermal system along the Kermadec arc and hosts two distinct hydrothermal systems, one magmatic fluid dominated, and the other seawater dominated, making the site perfect for studying nascent volcanogenic massive sulfide formation and fluid pathways. The International …
Electron-Positron Annihilation Lifetime Spectroscopy Of Mgo And Aluminum-Doped Mgo, Elise Liebow
Electron-Positron Annihilation Lifetime Spectroscopy Of Mgo And Aluminum-Doped Mgo, Elise Liebow
Honors Theses
Radiation is a form of energy that can damage materials at an atomic level. This has implications for the mobility of radioactive waste through containment materials. We are characterizing atomic defects in materials by using Electron-Positron Annihilation Lifetime Spectroscopy (EPALS). When an electron and positron come into contact with each other, they annihilate and release two antiparallel 511-keV gamma rays. In a pristine crystalline sample, positrons can easily annihilate with electrons, but in a sample with vacancies/defects in the crystal structure, positrons take longer to annihilate. Therefore, the more vacancies in a sample, the longer the average lifetime of a …
Soil Inhomogeneity Effects On Seismic Wind Noise, Bipin Koirala
Soil Inhomogeneity Effects On Seismic Wind Noise, Bipin Koirala
Honors Theses
Wind causes local pressure fluctuations over the ground. The pressure waves couples with the ground and transmits into the ground as seismic waves. The seismic wave, in turn, causes ground motion. Naderyan et al. [9] developed a prediction of the ground displacements spectra from the measured ground properties and predicted pressure and shear stress at the ground surface. Naderyan modeled the ground as a linearly elastic half space bounded by an infinite plane on one side. The quasi-static model for predicting displacement components in the ground is effective for the vertical component of the displacement response, but the model significantly …
Rutile As A Provenance Indicator For The Camerino Sandstone Of The Camerino Basin, Apennine Mountain Region, Italy, Wendy Bogil
Rutile As A Provenance Indicator For The Camerino Sandstone Of The Camerino Basin, Apennine Mountain Region, Italy, Wendy Bogil
Honors Theses
No abstract provided.
Transitional Granulite-Facies Mafic Xenoliths In The 2.8 Ga Trondjhemite-Tonalite-Granodiorite (Ttg) Gneisses Of The Eastern Beartooth Mountains, Mt/Wy: Evidence For Variable Fluid Interactions, Andrew W. Osborne
Honors Theses
No abstract provided.
Apatite Chemistry And Zoning In The Roseau Valley, Dominica, Lesser Antilles, Katherine Swager
Apatite Chemistry And Zoning In The Roseau Valley, Dominica, Lesser Antilles, Katherine Swager
Honors Theses
The island of Dominica is located in the center of the Lesser Antilles island arc. Located in the southwestern part of the island, the Roseau Valley contains a thick and complex stratigraphy of pyroclastic flows that terminate in the sea on the western side of the island near the capital of Roseau, likely originating from the Wotten Waven caldera, now partially capped by the Micotrin dome (Sigurdsson, 1972). We have dated several ignimbrite deposit using U-Th analyses of zircon rims. The ages of five deposits within the valley show polymodal distributions, suggesting multiple periods of crystallization (~6 ka - 250 …
Facies Reconstruction And Stratigraphy Of A Late Pleistocene Bald Cypress Forest Discovered On The Northern Gulf Of Mexico Continental Shelf, Suyapa Gonzalez-Rodriguez
Facies Reconstruction And Stratigraphy Of A Late Pleistocene Bald Cypress Forest Discovered On The Northern Gulf Of Mexico Continental Shelf, Suyapa Gonzalez-Rodriguez
Honors Theses
No abstract provided.
Facies Reconstruction And Stratigraphy Of A Late Pleistocene Bald Cypress Forest Discovered On The Northern Gulf Of Mexico Continental Shelf, Suyapa Gonzalez
Facies Reconstruction And Stratigraphy Of A Late Pleistocene Bald Cypress Forest Discovered On The Northern Gulf Of Mexico Continental Shelf, Suyapa Gonzalez
Honors Theses
No abstract provided.
Stratigraphic Analysis Of Florissant Fossil Beds National Monument Using Magnetic Susceptibility, Geochemical Comparison, And Gamma Ray Spectroscopy, Jennifer Kenyon
Stratigraphic Analysis Of Florissant Fossil Beds National Monument Using Magnetic Susceptibility, Geochemical Comparison, And Gamma Ray Spectroscopy, Jennifer Kenyon
Honors Theses
No abstract provided.
Using Foraminifera Shell Geochemistry To Test Proxies For Paleoenvironmental Reconstruction, Catherine Hudson
Using Foraminifera Shell Geochemistry To Test Proxies For Paleoenvironmental Reconstruction, Catherine Hudson
Honors Theses
No abstract provided.
Correlating Monotonous Crystal-Rich Dacitic Ignimbrites In Dominica: The Layou And Roseau Ignimbrite, Alexandra Flake
Correlating Monotonous Crystal-Rich Dacitic Ignimbrites In Dominica: The Layou And Roseau Ignimbrite, Alexandra Flake
Honors Theses
Dominica is a small island in the Lesser Antilles island arc. It has the highest concentrations of potentially active volcanoes in the world and features several large Pleistocene pyroclastic deposits that extend to the sea. Two of the ignimbrites emanate from central Dominica, with pyroclastic deposits filling the Layou and Roseau river valleys. Based on topography, the Layou Ignimbrite is believed to be from Morne Trois Pitons, whereas the Roseau Ignimbrite is derived from vents in the Wotten Waven region. On the coast in the village of Layou, the Layou Ignimbrite is 13 m thick with a basal large block …
Earthquake Relocation And Focal Mechanism Analysis In The Area Of Rupture Following The Mw = 7.6 September 5 2012 Nicoya Earthquake Costa Rica, Gregory Brenn
Honors Theses
As part of a Keck Geology Consortium project on the Nicoya Peninsula, Costa Rica, a dense broadband seismic array was installed directly above the rupture zone of the long-anticipated Nicoya September 5th, 2012, Mw= 7.6 earthquake. 5 Nanometrics Trillium compact seismometers and Taurus digitizers were installed, defining a ~200km triangular area with one triangular side oriented parallel to the trench and the apex located ~15km inland from the coast. This seismic network was operating from July 2nd to July 18th, and with this data combined with the permanent stations of the Nicoya broadband network, 254 events were initially located. Comparison …
On The Amount Of Sediment Deposited In Floodplains From The Mississippi River: A Case Study In Cat Island National Wildlife Refuge, Louisiana, Matthew Smith
Honors Theses
No abstract provided.
Consolidation And Suspension Of Mud From Lake Lery And Relevance To Wetland Restoration In Louisiana, Edward L. Lo
Consolidation And Suspension Of Mud From Lake Lery And Relevance To Wetland Restoration In Louisiana, Edward L. Lo
Honors Theses
No abstract provided.
Microbially Mediated Carbonate Precipitation Within Microbial Mat In Hyper-Saline Lakes Of The Bahamas, Shane Cone
Microbially Mediated Carbonate Precipitation Within Microbial Mat In Hyper-Saline Lakes Of The Bahamas, Shane Cone
Honors Theses
No abstract provided.
Reinterpreting The Stratigraphy Of The Florissant Fossil Beds National Monument Through Correlation By Magnetic Susceptibility And Geochemical Comparison, Lindsay Prothro
Reinterpreting The Stratigraphy Of The Florissant Fossil Beds National Monument Through Correlation By Magnetic Susceptibility And Geochemical Comparison, Lindsay Prothro
Honors Theses
No abstract provided.
Geodynamic Constraints On The Flow Of Samoan-Plume Mantle Into The Northern Lau Basin, Nathan Katsiaficas
Geodynamic Constraints On The Flow Of Samoan-Plume Mantle Into The Northern Lau Basin, Nathan Katsiaficas
Honors Theses
The northernmost portion of the Lau basin, South Pacific, features numerous geochemical and geophysical anomalies. These include: (1) a strong latitudinal gradient in the trace element and isotopic (Sr-Nd-Pb) enrichment of basalts erupted along the various back-arc spreading centers (BASCs) within the basin, (2) high 3He/4He (up to 28 times RA, where RA, the ratio in Earth's atmosphere, is 1.4 x 10-6) in basalts erupted along some portions of the BASCs (e.g., Rochambeau Bank), and (3) the presence of trench-parallel shear-wave splitting near the Tonga arc. The occurrence of these anomalies has been attributed to the southward flow of mantle …
Eastern Mediterranean Pore Waters: Clues Into The Geochemical Pathways From Evaporated Seawater To Basinal Brines, Jessica A. Mumphrey
Eastern Mediterranean Pore Waters: Clues Into The Geochemical Pathways From Evaporated Seawater To Basinal Brines, Jessica A. Mumphrey
Honors Theses
No abstract provided.
The Storm 2.0 Project Next Generation Hurricane Data Collection, Santhana Krishnan Balaji
The Storm 2.0 Project Next Generation Hurricane Data Collection, Santhana Krishnan Balaji
Honors Theses
No abstract provided.
Magnetic Susceptibility For The Paleocene-Eocene Boundary: Correlation Among Three Egyptian Sections, Kelli Willson
Magnetic Susceptibility For The Paleocene-Eocene Boundary: Correlation Among Three Egyptian Sections, Kelli Willson
Honors Theses
No abstract provided.
The Petrology Of The Precambrian Roof Pendants Thompson Peak, Sawtooth Mountains, Idaho, Susan Denise Anderson
The Petrology Of The Precambrian Roof Pendants Thompson Peak, Sawtooth Mountains, Idaho, Susan Denise Anderson
Honors Theses
No abstract provided.
Role Of Acetic Acid In Siliciclastic Diagenesis: An Experimental Study, Gina Marian Bagnetto Waters
Role Of Acetic Acid In Siliciclastic Diagenesis: An Experimental Study, Gina Marian Bagnetto Waters
Honors Theses
No abstract provided.
Role Of Acetic Acid In Siliciclastic Diagenesis: An Experimental Study, Gina Bagnetto Waters
Role Of Acetic Acid In Siliciclastic Diagenesis: An Experimental Study, Gina Bagnetto Waters
Honors Theses
No abstract provided.