HypoDD is a Fortran computer program package for relocating earthquakes with the double-difference algorithm of Waldhauser and Ellsworth (2000). This document provides a brief introduction into how to run and use the programs ph2dt and hypoDD to compute double-difference (DD) hypocenter locations. It gives a short overview of the DD technique, discusses the data preprocessing using ph2dt, and l...

Acoustic Tomography System, " a thesis by Justin Michael Eickmeier. Abstract Title: Acoustic tomography studies have traditionally been conducted in deep water, implementing high power, low frequency pulses transmitted over long distances to map large scale current events. Conducting acoustic tomography in a shallow water environment using high frequency low power pulses represents both unique ...

The benefits of using mobile base station to prolong sensor network lifetime have been well recognized. However, due to the complexity of the problem (time-dependent network topology and traffic routing), theoretical performance limits and provably optimal algorithms remain difficult to develop. This paper fills this important gap by contributing theoretical results regarding the optimal moveme...

Typical packet traffic in a sensor network reveals pronounced patterns that allow an adversary analyzing packet traffic to deduce the location of a base station. Once discovered, the base station can be destroyed, rendering the entire sensor network inoperative, since a base station is a central point of data collection and hence failure. This paper investigates a suite of decorrelation counter...

Queueing systems with Poisson arrival processes and Hypoexponential service time distribution have been widely studied in literature. Their steady-state analysis relies on the observation that the infinitesimal generator matrix has a block-regular structure and hence, matrix-analytic method may be applied. Let πnk be the steady-state probability of observing the k-th stage of service busy and n...