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Seismic Modeling With An Earthquake Shake Table, Jordan E. Barnes
Seismic Modeling With An Earthquake Shake Table, Jordan E. Barnes
Senior Theses
An earthquake shake table was constructed with three orthogonal directions of motion to simulate seismic waves. The peak amplitude and directions of motion are adjustable by the user. The table’s acceleration was measured at different amplitude settings for all three directions of motion, and that data was fit to the Peak Ground Acceleration (PGA) scale. This allows the table motion to be calibrated to the proper magnitude of an earthquake. An earthquake equivalent to 5.0 intensity on the PGA scale was achieved.
Automatic Pet Door With Magnetic Field Activation, Alex J. Keith
Automatic Pet Door With Magnetic Field Activation, Alex J. Keith
Senior Theses
Pet doors were initially created for the consumer that has a pet but does not want to hassle with letting the pet in and out of the house or allowing them access to food and shelter. The market has been flooded with automatic pet doors that are activated by a magnetic field, radio frequency or other activation signal. These doors are designed to be installed in a door or door frame. These doors, however, are very expensive, made of low-cost materials, and are limited in the places that they can be installed. Also, because they commonly use elaborate motors built …
A Maskless Photolithography Apparatus For The Microfabrication Of Electrical Leads, Kyel Lambert
A Maskless Photolithography Apparatus For The Microfabrication Of Electrical Leads, Kyel Lambert
Senior Theses
Graphene is a new and exciting, two-dimensional material. Particularly interesting are the electrical features of graphene. The small size of graphene used in this experiment (on the scale of microns) presents the need for small electrical leads. Photolithography can be used to make appropriately sized leads by depositing metal onto substrates in specific patterns. The technique uses light to transfer geometric patterns onto a light sensitive photoresist on the surface of a substrate. We have built a low cost, maskless photolithography apparatus assembled from a computer, a consumer grade projector, and a microscope. With multiple exposures, we can make features …