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Wavelet Based Feature Extraction And Dimension Reduction For The Classification Of Human Cardiac Electrogram Depolarization Waveforms, Christopher S. De Voir
Wavelet Based Feature Extraction And Dimension Reduction For The Classification Of Human Cardiac Electrogram Depolarization Waveforms, Christopher S. De Voir
Dissertations and Theses
An essential task for a pacemaker or implantable defibrillator is the accurate identification of rhythm categories so that the correct electrotherapy can be administered. Because some rhythms cause a rapid dangerous drop in cardiac output, it is necessary to categorize depolarization waveforms on a beat-to-beat basis to accomplish rhythm classification as rapidly as possible. In this thesis, a depolarization waveform classifier based on the Lifting Line Wavelet Transform is described. It overcomes problems in existing rate-based event classifiers; namely, (1) they are insensitive to the conduction path of the heart rhythm and (2) they are not robust to pseudo-events. The …
A Decision Model For Technology Assessment To Reduce The Internal Digital Divide In Emerging Economies (Case: Costa Rica), Audrey MaríA Alvear BáEz
A Decision Model For Technology Assessment To Reduce The Internal Digital Divide In Emerging Economies (Case: Costa Rica), Audrey MaríA Alvear BáEz
Dissertations and Theses
Information and Communication Technologies (ICTs) such as Wireless, the Internet, and e-commerce software are profoundly impacting how business and government are conducted. Digital divide (DD) refers to the gap that opens up between those who have access to, benefit and interact with ICTs and those who can not. ICTs can either accelerate change and thereby increase the DD in developing countries, or, if deployed carefully can be a tool to reduce the DD within a country. This study presents a systematic approach for doing the latter by identifying the ICTs, technology applications and key sectors that most impact the internal …
Open Source Software For Commercial Off-The-Shelf Gps Receivers, Andrew Greenberg
Open Source Software For Commercial Off-The-Shelf Gps Receivers, Andrew Greenberg
Dissertations and Theses
Inexpensive and commercially available Global Positioning System (GPS) receivers can be used in novel applications, such as nanosatellites and unmanned aerial vehicles (UAVs), by modifying the receiver's software. Unfortunately, typical GPS software development systems cost tens of thousands of dollars and have restrictive license agreements, such as non-disclosure agreements, for both their hardware and software. This thesis describes the design and construction of an open source GPS receiver development system that addresses these unnecessary restrictions. For the first time, any developer with a PC, a commercially available GPS receiver, and this development system can quickly and easily develop software for …