Experimental Determination of Achievable Information Rates for Single-Channel NRZ IM/DD High-Speed Optical Transmission

2006 ◽  
Author(s):  
Nikola Alic ◽  
Ivan B. Djordjevic ◽  
Bane Vasic ◽  
George C. Papen ◽  
Stojan Radic
Keyword(s):  
Experimental Determination ◽  
High Speed ◽  
Optical Transmission ◽  
Single Channel ◽  
Information Rates

scholarly journals Achievable information rates for high-speed long-haul optical transmission

2005 ◽  
Vol 23 (11) ◽  
pp. 3755-3763 ◽  
Author(s):  
I.B. Djordjevic ◽  
B. Vasic ◽  
M. Ivkovic ◽  
I. Gabitov
Keyword(s):  
High Speed ◽  
Optical Transmission ◽  
Information Rates

The Influence of Sampling Frequency on the Results of Motion Analysis Performed by High-Speed Digital Image Correlation

2015 ◽  
Vol 816 ◽  
pp. 397-403 ◽  
Author(s):  
Martin Hagara ◽  
Róbert Huňady
Keyword(s):  
Digital Image Correlation ◽  
Correlation Analysis ◽  
Experimental Determination ◽  
Digital Image ◽  
High Speed ◽  
Sampling Frequency ◽  
Image Correlation ◽  
Correlation System

The paper describes an experimental determination of kinematic quantities using high-speed digital image correlation system. It deals with the analysis of minimal sampling frequency needed for correctly performed high-speed correlation analysis. The authors also describe the influence of cameras sampling frequency on the quality of the obtained results. Mentioned analysis was performed using a rotational object. For the purposes of the results comparison the data obtained from correlation system in a form of displacements in three mutually perpendicular directions were processed in Matlab and in the paper are depicted in a form of graphical visualizations.

The Performance Testing of the Slingsby Sky

1954 ◽  
Vol 58 (523) ◽  
pp. 470-474
Author(s):  
K. E. Machin
Keyword(s):  
Experimental Determination ◽  
High Speed ◽  
Performance Testing ◽  
Considerable Improvement ◽  
Future Trends ◽  
Testing Technique ◽  
Speed Performance ◽  
The Mean ◽  
Air Speed

SummaryAn experimental determination of the relation between the rate of sink of a sailplane and its air speed is of interest both to the designer and to the pilot. This paper describes tests made to establish this relation for the Slingsby Sky. During the tests, the aircraft was flown in a series of “ partial glides ” at constant speed, while a camera looking over the pilot's shoulder photographed the altimeter and A.S.I., together with a slip indicator and a clock. From an analysis of the photographic recordings, the mean air speed and the rate of sink during each partial glide can be determined; a large number of such results enables the relation between air speed and rate of sink to be established. The final results show that a considerable improvement in high-speed performance can be achieved if the aircraft is fitted with a long skid instead of the short skid and large fixed landing wheel; the superiority of the Sky over the Weihe for competition work is demonstrated. Sources of error in the results are discussed; it is shown that the accuracy with which the rate of sink may be determined is limited by the presence of vertical air movements. Possible future trends in performance testing technique are discussed.

Aerodynamic and surface comparisons between Telstar 18 and Brazuca

2018 ◽  
Vol 232 (4) ◽  
pp. 342-348 ◽  
Author(s):  
John Eric Goff ◽  
Sungchan Hong ◽  
Takeshi Asai
Keyword(s):  
Experimental Determination ◽  
High Speed ◽  
Aerodynamic Coefficients ◽  
World Cup ◽  
Drag Coefficients ◽  
Soccer Ball ◽  
Critical Speeds ◽  
Aerodynamic Properties

Aerodynamic coefficients were determined for Telstar 18 and Brazuca, match balls for the 2018 and 2014 World Cups, respectively. Experimental determination of aerodynamic coefficients prompted the development of computationally determined soccer ball trajectories for most launch speeds experienced in actual play. Although Telstar 18’s horizontal range will be nearly 10% shorter than Brazuca’s horizontal range for high-speed kicks, both Telstar 18 and Brazuca have similar knuckling effects due to nearly equal critical speeds and high-speed drag coefficients that differ by less than 10%. Surface comparisons suggest why aerodynamic properties for the two World Cup balls are so similar.

Experimental determination of a state equation for dissipative granular gases

1999 ◽  
Vol 96 (6) ◽  
pp. 1111-1116 ◽  
Author(s):  
E. Falcon ◽  
S. Fauve ◽  
C. Laroche
Keyword(s):  
Experimental Determination ◽  
State Equation ◽  
Granular Gases
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