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ON THE USE OF J-DSP IN EARTH SYSTEMS

1. Introduction

Java-Digital Signal Processing (J-DSP) is a web-based, platform-independent, visual programming environment that enables users to perform online signal processing calculations and simulations. J-DSP was built from the ground up in Java to provide free and universal access to an array of signal processing functions that can be used for research and education1. All signal manipulation functions appear in J-DSP as "blocks" that are brought into the simulation environment by a drag-n-drop process. Signal and data flow is established by linking the blocks. Original J-DSP functionality targeted engineering algorithms for signal processing2, imaging3, controls4, time-frequency analysis5 and communications6 applications.

There is a strong need for introducing the basics of signal and data analysis tools to the students in earth systems and geology science courses. While research of time-dependent processes is becoming more prevalent, students lack training and hands-on experiences in the modeling and analysis of natural signals and data obtained from geological systems. J-DSP can be tailored to perform analysis and visualization of time-varying signals and data acquired in earth system and geological science. A new J-DSP Earth Systems Edition (J-DSP/ESE) has been developed through a partnership of Arizona State University (ASU), Johns Hopkins University (JHU) and Purdue University (PU). J- DSP/ESE has access to earth systems data which is generated using a data generation function. Customized interpolation, time-frequency analysis and filtering functions have been integrated into the new J-DSP/ESE program and are described in Section 2.

Modules that use the new J-DSP/ESE infrastructure have been developed for introduction to students in the DSP class at Arizona State University to earth systems and geology applications. Additional modules and exercises have been created for use in Earth systems classes at Johns Hopkins University. Below, we describe some of these modules

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Ramamurthy, K., & Spanias, A., & Hinnov, L., & Ogg, J. (2008, June), On The Use Of Java Dsp In Earth Systems Paper presented at 2008 Annual Conference & Exposition, Pittsburgh, Pennsylvania. 10.18260/1-2--4355