The energy flow for a spherical acoustic lens: Experimental results avoiding interference effects.

2010 ◽  
Vol 127 (3) ◽  
pp. 1913-1913
Author(s):  
Kendez C. Parker ◽  
Cleon E. Dean
Keyword(s):  
Energy Flow ◽  
Experimental Results ◽  
Interference Effects ◽  
Acoustic Lens

Test Method for Crosstalk Faults in VLSI Circuits Based on Multiple-Valued Decision Diagrams

2010 ◽  
Vol 20-23 ◽  
pp. 641-646
Author(s):  
Zhong Liang Pan ◽  
Ling Chen
Keyword(s):  
Digital Circuits ◽  
Digital Circuit ◽  
Vlsi Circuits ◽  
Test Method ◽  
Experimental Results ◽  
Decision Diagrams ◽  
Interference Effects ◽  
Test Set ◽  
Difference Operation ◽  
Test Vectors

The crosstalk fault in VLSI circuits is one of the interference effects being caused by parasitic capacitance and inductance coupling, it can lead to functional errors of circuits. It is necessary to detect the crosstalk faults in order to insure the functions of circuits. A new test method for crosstalk faults in VLSI circuits based on multiple-valued decision diagrams is presented in this paper, the test vectors of crosstalk faults are generated by building a multiple-valued decision diagram that is a difference operation of the two multiple-valued decision diagrams corresponding to the normal circuit and faulty circuit, respectively. One advantage of the test method is that it can get all test vectors of a given crosstalk fault, therefore for a digital circuit, the test set with minimal number of test vectors can be obtained. Experimental results on a lot of digital circuits demonstrate the feasibility of the method proposed in this paper.

scholarly journals Quantum Optics with Giant Atoms—the First Five Years

2020 ◽  
pp. 125-146 ◽  
Author(s):  
Anton Frisk Kockum
Keyword(s):  
Electromagnetic Field ◽  
Quantum Optics ◽  
Experimental Results ◽  
Interference Effects ◽  
Multiple Points ◽  
Artificial Atoms ◽  
Superconducting Circuits ◽  
Recent Advances

Abstract In quantum optics, it is common to assume that atoms can be approximated as point-like compared to the wavelength of the light they interact with. However, recent advances in experiments with artificial atoms built from superconducting circuits have shown that this assumption can be violated. Instead, these artificial atoms can couple to an electromagnetic field at multiple points, which are spaced wavelength distances apart. In this chapter, we present a survey of such systems, which we call giant atoms. The main novelty of giant atoms is that the multiple coupling points give rise to interference effects that are not present in quantum optics with ordinary, small atoms. We discuss both theoretical and experimental results for single and multiple giant atoms, and show how the interference effects can be used for interesting applications. We also give an outlook for this emerging field of quantum optics.

scholarly journals Wave resistance: the effect of varying draught

1925 ◽  
Vol 108 (748) ◽  
pp. 582-591 ◽  
Keyword(s):  
Wave Resistance ◽  
Plane Section ◽  
Experimental Results ◽  
Interference Effects ◽  
Different Types ◽  
Order Of Magnitude ◽  
The Right ◽  
Right Order ◽  
Considerable Range ◽  
Simplified Form

1, In previous studies in the theory of wave resistance, while the water-plane section of the model was of a reasonably ship-like form, the draught was assumed to be infinite. In the following paper the model has the same simple lines and has vertical sides, but the draught is finite. The investigation shows how the resistance at different speeds depends on the draught, but it was undertaken specially for other reasons. In view of certain applications, it was important to find how the interference effects due to bow and stern waves are affected by varying draught. It is shown now that these become less prominent with diminishing draught, but the maxima and minima occur at practically the same positions. Further, when the ratio of draught to length is of the order of the values in actual ship models, one is in a position to attempt a comparison between the absolute values of theoretical and experimental results. Curves are shown in fig. 2 (p. 590) for the variation of resistance with velocity in three cases—when the draught is infinite, and when it is one-tenth and one-twentieth of the length of the model. The latter values cover approximately the usual ratios in practice. On the same diagram are reproduced experimental curves for three models of different types, the data being reduced to the same non-dimensional co-ordinates. Making allowance for the differences of form between these models and for the simplified form for which the calculations have been made, the results show that the calculated values are of the right order of magnitude over a considerable range of velocity. Differences in the two sets of curves, such as the greater prominence of interference effects in the theoretical curves, are discussed.

The energy flow for a spherical acoustic lens: ray vs. wave methods

2008 ◽  
Vol 123 (5) ◽  
pp. 3520-3520
Author(s):  
Cleon E. Dean ◽  
James P. Braselton
Keyword(s):  
Energy Flow ◽  
Acoustic Lens ◽  
Wave Methods

Dexterity, Sensitivity and Versatility: An Under Actuated Robotic Hand with Mechanical Intelligence and Proprioceptive Actuation

2020 ◽  
Vol 17 (02) ◽  
pp. 2050006
Author(s):  
Xiaoguang Zhang ◽  
Taoyuanmin Zhu ◽  
Itsui Yamayoshi ◽  
Dennis Hong
Keyword(s):  
Potential Energy ◽  
Force Control ◽  
Energy Flow ◽  
Experimental Results ◽  
Force Sensing ◽  
Optimal Trajectories ◽  
Robotic Hand ◽  
Direct Drive ◽  
Goal Object ◽  
Object A

A three-finger under actuated robotic hand with dexterous force control and inherent compliance is developed and tested. A simplified biomimetic finger design is generated and applied with mechanical intelligence principles carefully designed and embedded such that optimal trajectories for grabbing are naturally followed and the fingers can automatically conform to the goal object. A generalizable potential energy flow theory is then proposed to explain the mechanism behind the mechanical intelligence. The theory is also supported by experimental results. Quasi-direct drive actuators were developed to actuate the robotic hand with proprioceptive force sensing and inherent compliance. The hand performs delicate force-controlled manipulation with a simple compliance controller implemented.

The energy flow for a spherical acoustic lens: Ray and wave methods vs experiment.

2009 ◽  
Vol 125 (4) ◽  
pp. 2627-2627
Author(s):  
Cleon E. Dean ◽  
James P. Braselton
Keyword(s):  
Energy Flow ◽  
Acoustic Lens ◽  
Wave Methods

A Note on Choking Cavitation Flow Past Bluff Bodies

1992 ◽  
Vol 114 (3) ◽  
pp. 439-442 ◽  
Author(s):  
A. S. Ramamurthy ◽  
R. Balachandar
Keyword(s):  
Pressure Distribution ◽  
Cavitation Number ◽  
Experimental Results ◽  
Bluff Bodies ◽  
Two Dimensional ◽  
Interference Effects ◽  
Cavitation Flow ◽  
Prismatic Body ◽  
Flow Past

A model is developed to predict the choking cavitation number for sharp edged bluff bodies subject to wall interference effects. The fact that the forebody pressure distribution under cavitating conditions essentially resembles the values obtained in noncavitating flows is made use of in the development of the model. The model is verified using experimental results from present and previous studies for a specific case of choking flow past a two-dimensional prismatic body.

Blockage Effects on Cavitation Inception Characteristics of Bluff Bodies

1991 ◽  
Vol 205 (6) ◽  
pp. 415-419 ◽  
Author(s):  
R Balachandar ◽  
A S Ramamurthy
Keyword(s):  
Bluff Body ◽  
Experimental Results ◽  
Bluff Bodies ◽  
Two Dimensional ◽  
Interference Effects ◽  
Cavitation Inception ◽  
Proposed Model

The study deals with the prediction of cavitation inception in the wake of two-dimensional bluff bodies subject to wall interference effects. Corrections are included in the model to account for flow entrainment effects and loss of circulation in the vortices shed from the bluff body. Experimental results are also presented to verify the proposed model over a range of blockages.

Along-Wind Dynamic Interference Effects of Tall Buildings

2005 ◽  
Vol 8 (6) ◽  
pp. 623-636 ◽  
Author(s):  
M. Gu ◽  
Z. N. Xie ◽  
P. Huang
Keyword(s):  
Tall Buildings ◽  
Experimental Results ◽  
Force Balance ◽  
Interference Effects ◽  
Huge Amount ◽  
Interference Factor ◽  
Building Models ◽  
Testing Data ◽  
Balance Technique ◽  
Dynamic Interference

Most previous investigations have focused on the wind induced interference effects between two buildings. The interference effects of three or more buildings have seldom been studied so far due to the huge workload of experiments and data processing. In this paper, the along-wind dynamic interference effects of two and three tall buildings are investigated through a series of wind tunnel tests on typical tall building models using the high frequency force balance technique. The testing cases are totally over 8000. In order to conveniently and rapidly process the huge amount of testing data, a Windows-based software platform integrating artificial neural network, statistics and spectral computations is developed. Database technique is also employed in the platform to manage the experimental results. Because of a vast amount of experimental results, this paper presents only detailed results of the along-wind dynamic interference effects but not the across-wind effects. Some selected results of the twin-building configuration from the present tests are compared with the previous comparable results in literature. Effects of upstream terrain, height ratio and breadth ratio of the tested models on the interference factor are discussed in detail.

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