Boffin—a personal story of the early days of radar, radio astronomy and quantum optics

IEE Review ◽  
1992 ◽  
Vol 38 (1) ◽  
pp. 33
Author(s):  
R.W. Burns

R. Hanbury Brown, Boffin: a personal story of the early days of radar, radio astronomy and quantum optics . Bristol: Adam Hilger, 1991, £17.50. ISBN 0-750-30130-9 It is doubtful if many scientists noticed the last paragraph of a mathematical paper published in 1954 by R. Hanbury Brown and R.Q. Twiss in the Philosophical Magazine . In this paper they gave the theory of a new type of interferometer for the measurement of the angular diameter of sources of radio emission. Unlike the Michelson type of optical interferometer extended to radio wavelengths, which depended on the combination of the signals from the two aerials before detection so that the relative phases were preserved, this new instrument was based upon the correlation between the rectified outputs of two independent receivers at each end of the baseline. Information about the relative phases was lost but in their Philosophical Magazine paper the authors showed that the cross correlation coefficient between the rectified outputs would be proportional to the square of the amplitude of the Fourier transform of the intensity distribution across the source.


2008 ◽  
Vol 18 (1) ◽  
pp. 37-42 ◽  
Author(s):  
Margaret Leahy

Abstract Educating students and informing clinicians regarding developments in therapy approaches and in evidence-based practice are important elements of the responsibility of specialist academic posts in universities. In this article, the development of narrative therapy and its theoretical background are outlined (preceded by a general outline of how the topic of fluency disorders is introduced to students at an Irish university). An example of implementing narrative therapy with a 12-year-old boy is presented. The brief case description demonstrates how narrative therapy facilitated this 12-year-old make sense of his dysfluency and his phonological disorder, leading to his improved understanding and management of the problems, fostering a sense of control that led ultimately to their resolution.


ASHA Leader ◽  
2015 ◽  
Vol 20 (12) ◽  
Author(s):  
Laura Morgan ◽  
Anna Miller
Keyword(s):  

Author(s):  
Karl F. Warnick ◽  
Rob Maaskant ◽  
Marianna V. Ivashina ◽  
David B. Davidson ◽  
Brian D. Jeffs

Author(s):  
Gilbert Grynberg ◽  
Alain Aspect ◽  
Claude Fabre ◽  
Claude Cohen-Tannoudji
Keyword(s):  

Author(s):  
Pierre Meystre ◽  
Murray Sargent
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