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Constraining Cosmological Parameters Using The Correlation Function, Michael Warrener
Constraining Cosmological Parameters Using The Correlation Function, Michael Warrener
Honors Theses
As the European Space Agency prepares to launch the space telescope Euclid in 2020, we are interested in using its observations of galaxy clustering as a new geometry-based tool to constrain the cosmological parameters Ωm and ΩΛ. In this work, we use data simulated by Magneticum (a high-resolution cosmological structure simulation) to model the correlation functions of both galaxies and clusters at several redshifts. We fit analytic models to the simulated data centered at the baryon acoustic oscillation peak to extract both the matter density parameter Ωm and the dark energy density parameter ΩΛ: We find that the correct cosmology …
Atomic Force Microscopy Of Poly(Ethylane-Oxide) Crystalization, Xavier Capaldi
Atomic Force Microscopy Of Poly(Ethylane-Oxide) Crystalization, Xavier Capaldi
Honors Theses
Polymer crystallization is a complex process which is influenced by a variety of factors. Atomic force microscopy is used to explore the material properties of polymer crystals. Poly(ethylene-oxide) is used in a variety of molecular weights as the sample. In addition, a variety of sample preparation methods and microscopy modes were tested. A relatively new imaging technique was identified for the characterization of polymer crystals: amplitude modulation-frequency modulation viscoelastic mapping. This mode was used to measure material properties such as stiffness and dissipation.
Gasoline Confined In Nano-Porous Media, Matthew Giso
Gasoline Confined In Nano-Porous Media, Matthew Giso
Honors Theses
The heat of combustion was determined for gasoline confined in nano-porous media of differing pore size by bomb calorimetry. The heat of combustion of the confined fuels was comparable to that of bulk within the experimental uncertainty. This suggests that all of the confined fuel burns without any flame quenching and no chemical interactions at the interface between pore walls and fuel mitigate combustion.
Approaching Humans For Help: A Study Of Human-Robot Proxemics, Eric Rose
Approaching Humans For Help: A Study Of Human-Robot Proxemics, Eric Rose
Honors Theses
In order for a robot to be effective when interacting with a person, it is important for the robot to choose the correct person. Consider an example where a robot is trying to perform a task but it isn’t capable of doing a subtask, like going up a flight of stairs. In this case, the robot would need to ask a person for help with the elevator, in a socially appropriate way. We have conducted an experiment to determine who would be the best candidate to approach in a situation like this. Should the robot choose to approach someone who …
Direction Of Lead Diffusion In Geological Samples Using Rutherford Backscattering Sepctrometry, Andrew Mccalmont
Direction Of Lead Diffusion In Geological Samples Using Rutherford Backscattering Sepctrometry, Andrew Mccalmont
Honors Theses
A Rutherford Backscattering (RBS) analysis experiment was performed on several pyrrhotite samples in order to understand their lead (Pb) diffusive properties and determine the diffusion coefficients for Pb into the sample. The pyrrhotite samples were prepared at Rensselaer Polytechnic Institute and were subsequently annealed for one to several days at temperatures on the order of 500–800℃. A 1.1–MV Pelletron Accelerator in the Union College Ion Beam Analysis Laboratory was used to produce beams of 3.3–MeV alpha particles. The beam of alpha particles collided with the samples and the backscattered alpha particles’ energies were detected using a silicon surface barrier detector. …
General Relativity And Differential Geometry, Harry Hausner
Pixe Analysis Of Aerosol Soil Artificial Turf And Running Track Samples, Joshua Yoskowitz
Pixe Analysis Of Aerosol Soil Artificial Turf And Running Track Samples, Joshua Yoskowitz
Honors Theses
Proton-induced X-ray emission spectroscopy (PIXE) has been performed on aerosol, soil, artificial turf, and running track samples using the 1.1-MV tandem Pelletron accelerator in the Union College Ion Beam Analysis Laboratory. PIXE analysis of the aerosol and soil samples was performed with 2.2-MeV proton beams. X-ray energy spectra were measured with a silicon drift detector and analyzed with GUPIX software to determine the elemental concentrations in the aerosol and soil samples. Of particular interest are the concentrations of airborne pollutants, such as sulfur that can contribute to acid rain and the acidification of Adirondack lakes such as Piseco Lake. PIXE …