LED Flashlight White Paper (PDF)
A white paper discussion of LED flashlight design.  It covers the optical, thermal, electrical, mechanical and interface issues involved in designing a flashlight with LEDs.  The paper also discusses how the human visual system works and how that impacts the flashlight design.  August 2011.
Power Supply Design for LED Flashlights (PDF)
Discusses inductive switching power supplies and regulation systems in the context of LED flashlights.  September 2007.
Can You Patent an LED Flashlight? (PDF)
A paper discussing the issues and validity of recent LED flashlight patents.  January 2003.
Birth of a New Lamp System (PDF)
A historic account of the Action Light project including a look at older technology designs.  April 1999.
Why Cyalumes® and Other Chemical Light Sticks Make Poor Backup Lights (PDF)
Cyalumes and other chemical light sticks have many characteristics that make them seem ideal as a backup light source.  However, they cannot be trusted to produce light when you need it most.  September 1999.
A Pragmatic Perspective on COVID-19 (PDF)
A pragmatic look at the COVID-19 pandemic caused by the SARS-CoV-2 virus.  Originally written in May 2020 and updated throughout 2020 and 2021.
The Trophoblast and the Pancreatic Enzyme Treatment of Cancer (PDF)
A summary of the theory, science and history of Dr. John Beard's trophoblastic theory of cancer and the resulting pancreatic enzyme treatment of cancer. Includes references.  February 2017.
Shame: Confessions of the Father of the Neutron Bomb (PDF)
Sam Cohen invented the neutron bomb.  Learn the history behind the neutron bomb in his autobiography.  Sam Cohan passed away in 2010 at the age of 89.  September 2015.
An Abridged Collection of Interdisciplinary Laws (PDF)
A large collection of interdisciplinary laws.  January 1979.
Proposed Standard for Measuring Flashlight Output (PDF)
A proposed standard for measuring flashlight output that would provide consumers useful data to compare one flashlight to another. Note that since this paper was written, the FL-1 ANSI Standard has been released.  September 2005.

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Updated September 2021