Houghton University Digital Archives

The Houghton University Archives serves the students, faculty, staff, administration and alumni of Houghton University by collecting and maintaining a historical record of the University story. The Archives collects, organizes, preserves, and makes accessible materials critical to understanding the historic, present, and future mission of Houghton University and to nurturing identity, purpose, and unity in the University community. This DSpace site provides access to some of the Houghton University's digital collections.

 

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Now showing 1 - 5 of 8

Recent Submissions

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Constructing an X-Ray Diffractometer for the Analysis of Thin Metal Films at Houghton University
(Houghton University, 2025-05-05) Fall, Owen D.
Houghton University is making an X-ray diffractometer to analyze thin metal films. X-rays are produced in a Norelco diffraction tube and detected by a Vernier Geiger tube. The angular positions of the detector and sample are controlled by stepper motors driving around a semicircular stage and are monitored by two rotary encoders each. The motors rotate at 0.68 m°/step, and there are 22.5 m°/encoder position. The sample is aligned to the axis of rotation with a linear stage. A Teensy 4.1 microcontroller controls the system via a Processing interface. Motor and encoder tests found that the angular distance between encoder positions is not uniform. An array of the number of steps between each encoder position was made for the sample and detector, which allows their angular position to be precisely known.
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Can a Radar Emulator be used to Identify Simulated Pre-Tornadic Small-Scale Vorticity?
(Houghton University, 2025-05-05) Harley, Noah
Tornadoes are largely unpredictable severe weather events that are chaotic in nature. Much of this unpredictability stems from a lack of specific knowledge regarding the process of tornadogenesis. This thesis describes a proposed investigation of pre-tornadic, surfacebased, small-scale vorticity present in the high-resolution Cloud Model 1 numerical convective simulation of the May 24, 2011, El Reno tornadic supercell. The radar emulator RSim will be used to sample the simulated storm using different radar wavelengths, range resolutions, azimuthal resolutions, beamwidths, and other parameters similar to real-world radar sampling strategies. This will potentially allow scanning radar parameters to be optimized, enabling future field campaigns to test for the presence of this pre-tornadic phenomenon. The collaboration would include researchers from the Ohio State University, the University of Wisconsin-Madison, and the University of Oklahoma.
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Houghton University’s Phase-Shifting Laser Interferometer for the Study of Thin Metal Films
(Houghton University, 2025-05-05) Yelle, Luke
A modified Twyman-Green phase-shifting laser interferometer was built by Houghton University to determine the thickness of thin metal films. A 635 nm beam is split by a cube beam splitter. Lenses expand and culminate the beams to a diameter of 83 mm. One beam reflects off the thin film sample. The other reflects off a 10 cm diameter, 𝜆10 flat, phase-shifting reference mirror moving via piezoelectric ceramic stacks, controlled by an Arduino. Both are then combined to form an interference pattern on a screen. The intensity of a given point on the interference pattern changes sinusoidally with the change of position of the reference mirror. A set of pictures is taken at different reference positions by an HP high-definition camera and is then processed by a Processing code. Each pixel of the image set is fit to determine its effective intensity phase shift, which is then used to map the topography of the film surface.
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The Lantern, Editor's Edition
(Houghton University, 2025-05-06) Lantern
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The Lantern, April 2025
(Houghton University, 2025-04-30) Lantern