scholarly journals Androgenic modulation of extraordinary muscle speed creates a performance trade-off with endurance

2020 ◽  
Vol 223 (11) ◽  
pp. jeb222984 ◽  
Author(s):  
Daniel J. Tobiansky ◽  
Meredith C. Miles ◽  
Franz Goller ◽  
Matthew J. Fuxjager
Keyword(s):  
Trade Off ◽  
A Performance

On a performance-robustness trade-off intrinsic to the natural anti-windup problem

Automatica ◽  
2006 ◽  
Vol 42 (11) ◽  
pp. 1849-1861 ◽  
Author(s):  
Sergio Galeani ◽  
Andrew R. Teel
Keyword(s):  
Trade Off ◽  
Performance Robustness ◽  
A Performance

Generalized homogenization model of piezoelectric materials for ultrasonic transducer applications

2021 ◽  
pp. 002199832110588
Author(s):  
Fidéle Léopold Hanse Wampo ◽  
Richard Ntenga ◽  
Joseph Yves Effa ◽  
Yuri Lapusta ◽  
Guy Edgar Ntamack ◽  
...  
Keyword(s):  
Coupling Coefficient ◽  
Volume Fraction ◽  
Piezoelectric Materials ◽  
Ultrasonic Transducer ◽  
Trade Off ◽  
Analytical Results ◽  
Homogenization Model ◽  
A Performance

Although piezocomposite (PC) materials have increasingly attracted researchers, there is still a need to properly and easily derive their properties. We develop a generalized homogenization model (GHM) that accounts for Smith and Cha approaches to evaluate the equivalent characteristics of piezocomposites. This method could be applied to all connectivities patterns, but restricted herein to 2-2 and 1-3 piezocomposites for comparison with Smith (1-3) and Cha (2-2) analytical results. In the proposed GHM is a parameter θ, is changed for various connectivities. The 1-3 and 2-2 PZT-7A/Araldite D (PCs) data are used and equivalent characteristics of these Pcs are determined as function of volume fraction of PZT-7A piezoelectric. Results show that the electromechanical coefficients are well fitted by Voigt and Reuss models. Results obtained for some parameters show that the proposed GHM is consistent with the analytical existing models used for the 1-3 and 2-2 connectivities and is in line with measured values from Chan and Unsworth (1989). Based on the GHM 2-2 configuration results of piezocomposite materials, the electroacoustic responses of transducers having some of these properties are simulated using the KLM model. A performance trade-off was chosen, resulting in an improved thickness coupling coefficient and a lowered acoustical impedance, and a similar approach as that on a pure PZT-7A.

A Flow-Preserving Algorithm for the Time-Cost Trade-Off Problem

1982 ◽  
Vol 14 (2) ◽  
pp. 109-113 ◽  
Author(s):  
Suleyman Tufekci
Keyword(s):  
Time Cost ◽  
Trade Off

Dual Goals for Speed and Accuracy on the Same Performance Task

2012 ◽  
Vol 11 (3) ◽  
pp. 118-126 ◽  
Author(s):  
Olive Emil Wetter ◽  
Jürgen Wegge ◽  
Klaus Jonas ◽  
Klaus-Helmut Schmidt
Keyword(s):  
Memory Scanning ◽  
Performance Task ◽  
Performance Tasks ◽  
Trade Off ◽  
Test Experiment ◽  
Trade Offs ◽  
New Finding ◽  
Sternberg Paradigm ◽  
Speed Accuracy ◽  
Speed And Accuracy

In most work contexts, several performance goals coexist, and conflicts between them and trade-offs can occur. Our paper is the first to contrast a dual goal for speed and accuracy with a single goal for speed on the same task. The Sternberg paradigm (Experiment 1, n = 57) and the d2 test (Experiment 2, n = 19) were used as performance tasks. Speed measures and errors revealed in both experiments that dual as well as single goals increase performance by enhancing memory scanning. However, the single speed goal triggered a speed-accuracy trade-off, favoring speed over accuracy, whereas this was not the case with the dual goal. In difficult trials, dual goals slowed down scanning processes again so that errors could be prevented. This new finding is particularly relevant for security domains, where both aspects have to be managed simultaneously.

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