HOME >> BIOLOGY >> NEWS
Physics tip sheet #42

1) Time Reversed Signals for Future Cell Phones
G. Lerosey et al.
Physical Review Letters, 14 May 2004
http://link.aps.org/abstract/PRL/v92/e193904
http://link.aps.org/abstract/PRL/v92/e193904

In recent years, researchers have found that they can improve acoustic signal transmission in complex environments with a technique known as time reversal. In effect, they broadcast a signal to determine how it propagates through an arrangement of obstructions, and then send a reversed version of the signal back from the detectors to the original source. Now researchers at the Laboratoire Ondes et Acoustique in Paris have managed to apply the same technique to electromagnetic signals at 2.45 GHz, a frequency close to the operating range of cell phones. The experiment heralds the possibility of improving cell phone communications in cities and other environments where obstructions, such as skyscrapers, may eventually aid cellular performance rather than hindering it.

2) Exploiting Noise to Increase Profits
A. Traulsen et al.
Physical Review Letters (to appear)

The interactions between populations with different ambitions (shoppers and sellers, attackers and defenders, men and women) can lead to intricate and complicated dynamics as competitors struggle to adapt and gain an advantage. Researchers at the Christian-Albrechts University in Germany now find that it's not only beneficial for competitors to adapt, but it can also be helpful for them to adjust the rate at which they adapt. The researchers studied competition in numerical models that included random fluctuations, i.e. statistical noise. They found that flexible competitors who adjust their adaptation rate could improve their prosperity in noisy systems. The researchers suggest that their model may have important economic implicatio
'"/>

Contact: James Riordon
riordon@aps.org
301-209-3238
American Physical Society
24-May-2004


Page: 1 2 3 4 5

Related biology news :

1. Physics gravity model applicable to disease spread
2. Physics tip sheet #41 - April 5, 2004
3. Physics tip sheet #39 - Nov. 17, 2003
4. Physics tip sheet #37
5. Physics tip sheet #36 - July 30, 2003
6. Physics tip sheet #34 - April 1, 2003
7. Physics tip sheet #33 March 28, 2003
8. Physics tip sheet #30 - January 9, 2003
9. Physics tip sheet #29 October 23, 2002
10. Physics tip sheet #21 July 10, 2002
11. Physics tip sheet #20 July 3, 2002

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/6/2017)... , May 5, 2017 ... just announced a new breakthrough in biometric authentication ... exploits quantum mechanical properties to perform biometric authentication. These ... smart semiconductor material created by Ram Group and ... finance, entertainment, transportation, supply chains and security. Ram ...
(Date:4/17/2017)... NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" ... its 2016 Annual Report on Form 10-K on Thursday April 13, ... ... the Investor Relations section of the Company,s website at http://www.nxt-id.com ... http://www.sec.gov . 2016 Year Highlights: ...
(Date:4/11/2017)... Research and Markets has announced the addition of the ... ... to grow at a CAGR of 30.37% during the period 2017-2021. ... been prepared based on an in-depth market analysis with inputs from ... prospects over the coming years. The report also includes a discussion ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... (PRWEB) , ... October 11, 2017 , ... ... compared the implantation and pregnancy rates in frozen and fresh in vitro ... of progesterone and maternal age to IVF success. , After comparing the results ...
(Date:10/10/2017)... , ... October 10, 2017 , ... San Diego-based team ... its corporate rebranding initiative announced today. The bold new look is part of ... the company moves into a significant growth period. , It will also expand its ...
(Date:10/10/2017)... ... October 10, 2017 , ... For the second time ... US2020 STEM Mentoring Award. Representatives of the FirstHand program travelled to Washington, D.C. ... US2020. , US2020’s mission is to change the trajectory of STEM education in ...
(Date:10/10/2017)... , Oct. 10, 2017 International research firm Parks Associates ... will speak at the TMA 2017 Annual Meeting , October 11 ... in the residential home security market and how smart safety and security ... Parks Associates: ... "The residential security ...
Breaking Biology Technology:
Cached News: