Bradley M. Bell's Home Page

Bradley M. Bell's Home Page

Bradley M. Bell, Research Scientist/Engineer,

Address	Applied Physics Laboratory	Institute for Health Metrics and Evaluation
	University of Washington	University of Washington
	1013 NE 40th Street, Seattle	Suite 600, 2301 Fifth Ave., Seattle
PO Box	US: 98105-6698, UW: 355640	US: 98121-8210, UW: 358210
Paging	206-543-1300	206-897-2800
Fax	206-543-6785	206-897-2899

UW e-mail

bradbell at uw dot edu

Other e-mail

bradbell at seanet dot com

Technical Biography
Dr. Bell received his BA in math and physics from Saint Lawrence University in 1973, his MA in mathematics from the University of Washington in 1976. and his Ph.D. in mathematics from the University of Washington in 1984. Currently he is employed by the Applied Physics Laboratory of the University of Washington. Much of his current work is in collaboration with the UW School of Public Health as a member of the The Institute for Health Metrics and Evaluation . He is also the project manager for the Coin-OR Algorithmic Differentiation project CppAD . His current research is focused on statistically motivated numerical methods for scientific modeling and data analysis. This includes: algorithmic differentiation, Kalman filtering and smoothing, stochastic function estimation (Tikhonov regularization), nonlinear mixed effects estimation, optimization, and monte-carlo simulation.

Software Development
Brad does a lot of numerical software development using the iterative and incremental development process The following diagram summarizes the process:



     |------------|      |-------------|      |--------------|

     |            |      |Documentation|      |   Design     |

     |Requirements|  ->  |     and     |  ->  |    and       |

     |            |      |specification|      |implementation|

     |------------|      |-------------|      |--------------|

           /|\                                      |         

            |                                      \|/        

     |------------|      |-------------|      |--------------|

     |            |      |Distribution |      | Automated    |

     | Evaluation |  <-  |     and     |   <- |   unit       |

     |            |      | maintenance |      |  testing     |

     |------------|      |-------------|      |--------------|

Non-Technical Biography
Brad was born in New York city on June 10, 1952. His father, George Bell, owned a metal working shop in Brooklyn New York. As a child he would spend the summers at Keewaydin a camp in Salisbury Vermont. Later he spent his summers working for his father. After graduating from Saint Lawrence University, Brad moved to Seattle and attended graduate school in mathematics at the University of Washington. After completing a master's degree, he worked as a software engineer for Flow Research. While working at Flow Research, his son Gabriel Bell was born. After working at Flow Research for a few years, he accepted a software engineer position as a member of the Applied Physics Laboratory. After working at APL for a few years, the Laboratory awarded him a scholarship to attended graduate school and finish his Ph.D. Around this time he took up white water kayaking and enjoyed that sport for many years. More recently, he has taken up rock climbing.

Complex Step Method
A short discussion of the first and second order complex step methods in C++ can be found at CppComplexStep .

Teaching

Math 407, 2005	HTML XML
Math 407, 2006	HTML XML
Math 407, 2008	HTML XML

Topics

links	Brad's Internet Links
conferences	Upcoming Conferences
journals	Journals Related to Brad's Research
packages	Brad's Opens Source Packages
publications	Bradley M. Bell's Publications
resume	Resume
pub_abstract	Abstracts for Published Papers
white_paper	Unpublished Paper's
ssh_key	Using ssh With Out Passwords
bikelist	A Bicycle Trip Packing List
rock_climb	Rock Climbing Links

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