Alexa Machine Learning

Work as a teaching assistant for courses at the engineering school: Electronics, Intro. to Systems, Statistics and Instrumentation. I host a two-hour weekly recitation class where I reviewed lecture materials and assignments with students. I also assist students in weekly laboratory exercises where they are permitted hands-on experience in the analysis and design of simple circuits and systems. Finally, I grade homework, laboratory exercises and examinations. From this work experience, I developed the skill, attention, and care it takes to work with and teach students at both the graduate and undergraduate level across different disciplines.

Investigated the feasibility of a piezoelectric-based sensor as wearable device for monitoring asthma symptoms under Dr. Kofi Odame’s supervision. I designed and implemented the piezo-sensor electronics. I explored features of interest in the sensor output and put together signal processing methods to extract the said features. Finally, I explored different machine learning algorithms to automatically detect coughs in the sensor output stream. In this project, I garnered skills in machine learning algorithms, acoustic signal processing and printed circuit board design.

Performed research with Dr. Ryan Halter on a small form-factor bioimpedance system. I devised a portable tetra-polar impedance analysis system to meet higher efficiency and safety specifications. This involved developing an analog front-end circuit to adapt a stock impedance analyzer chip to meet the higher requirements. In this project, I gained experience in circuit design and implementation for clinical electronic instruments.

Conducted research with Dr. Richard Denton in investigating the dependence of bulk plasma composition at geosynchronous orbit on solar cycle phases. Using MATLAB, we investigated and modeled the changes in particle density of bulk ions with respect to solar cycles, magnetic local time, and seasons. I acquired computational and analytical techniques required to efficiently manage and process enormous data.

Offered technical support in iMovie, Final Cut Pro, Garage Band, Adobe Suite software, and general multimedia editing and management. I organized and hosted workshops in iMovie and Photoshop for library patrons. Here, I also developed a panoramic virtual tour of the media center and improved upon the graphical presentation of the media catalog by creating web-based carousel for resources in catalog.

Conducted research in the MII lab of Dr. Craig Levin, in Stanford University’s Radiology Department. We designed a Cadmium Zinc Telluride (CZT) based PET system for imaging small animals. Specifically, I calibrated the detector unit to yield energy spectra of event pulses in units of kev versus event counts. I also devised a system to automatically determine a threshold for noise and trigger the detector on that threshold. From this experience, I acquired skills in digital signal processing and object oriented programming in C++.

Performed daily maintenance routines on plant generators, transformers, and switchyard breakers. In an 8-man maintenance team, I partook in the emergency replacement of a burned unit transformer. Also installed new fuel treatment control unit and cooling fans on transformers.

Taught classes of up to 40 students English as a second language, Math and Information Technology. In addition, I also set up a new computer laboratory with 15 computers and created a digital database of school’s student enrollment and attendance records. This experience required use of my technical skills in managing databases through Microsoft Access.