Application-Oriented Ray Theory

1978 ◽  
Vol 15 (3) ◽  
pp. 215-223 ◽  
Author(s):  
Dan Censor

This is a tutorial presentation of the subject of ray theory as provided for third-year students of electrical engineering. The concepts of the eikonal and dispersion equation, group velocity, wave packet, Fermat's principle and the ray equations are introduced. This is essential for students majoring in electromagnetic engineering.

2002 ◽  
Author(s):  
Volker Westphal ◽  
Sunita Radhakrishnan ◽  
Andrew M. Rollins ◽  
Joseph A. Izatt

2018 ◽  
Vol 27 (14) ◽  
pp. 1847025 ◽  
Author(s):  
Shahar Hod

Black-hole spacetimes are known to possess closed light rings. We here present a remarkably compact theorem which reveals the physically intriguing fact that these unique null circular geodesics provide the fastest way, as measured by asymptotic observers, to circle around spinning Kerr black holes.


Author(s):  
Valentin Meshbey ◽  
Evgeny Ragoza ◽  
Dan Kosloff ◽  
Uzi Egozi ◽  
Tal Wexler

2003 ◽  
Vol 1 (1) ◽  
pp. 81-87
Author(s):  
Krasimir Penev ◽  
Kostadin Brandisky

The Department of Theoretical Electrical Engineering (TEE) of Technical University of Sofia has been developing interactive enterprise-technologies based course on Theoretical Electrical Engineering. One side of the project is the development of multimedia teaching modules for the core undergraduate electrical engineering courses (Circuit Theory and Electromagnetic Fields) and the other side is the development of Software Architecture of the web site on which modules are deployed. Initial efforts have been directed at the development of multimedia modules for the subject Electrical Circuits and on developing the web site structure. The objective is to develop teaching materials that will enhance lectures and laboratory exercises and will allow computerized examinations on the subject. This article outlines the framework used to develop the web site structure, the Circuit Theory teaching modules, and the strategy of their use as teaching tool.


2011 ◽  
Vol 46 (6) ◽  
pp. 702-704 ◽  
Author(s):  
Orr Paleiov ◽  
Ofir Pupko ◽  
S G Lipson

Author(s):  
Paul J. Nahin

This introductory chapter considers the work of mathematician George Boole (1815–1864), whose book An Investigation of the Laws of Thought (1854) would have a huge impact on humanity. Boole's mathematics, the basis for what is now called Boolean algebra, is the subject of this book. It is also called mathematical logic, and today it is a routine analytical tool of the logic-design engineers who create the electronic circuitry that we now cannot live without, from computers to automobiles to home appliances. Boolean algebra is not traditional or classical Aristotelian logic, a subject generally taught in college by the philosophy department. Boolean algebra, by contrast, is generally in the hands of electrical engineering professors and/or the mathematics faculty.


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