scholarly journals IMPEDANCE VIBRATOR WITH ARBITRARY POINT OF EXCITATION

2008 ◽  
Vol 5 ◽  
pp. 275-290 ◽  
Author(s):  
Mikhail V. Nesterenko ◽  
V. A. Katrich ◽  
Victor M. Dakhov ◽  
Sergey L. Berdnik
Keyword(s):  
Arbitrary Point

Effects of low-frequency stimulation of the superior colliculus on spontaneous and visually guided saccades

1993 ◽  
Vol 69 (3) ◽  
pp. 953-964 ◽  
Author(s):  
P. W. Glimcher ◽  
D. L. Sparks
Keyword(s):  
Superior Colliculus ◽  
Time Course ◽  
Low Frequency ◽  
Arbitrary Point ◽  
Visually Guided ◽  
Spontaneous Movements ◽  
Low Frequency Stimulation ◽  
Frequency Stimulation ◽  
Stimulation Current ◽  
Stimulation Of

1. The first experiment of this study determined the effects of low-frequency stimulation of the monkey superior colliculus on spontaneous saccades in the dark. Stimulation trains, subthreshold for eliciting short-latency fixed-vector saccades, were highly effective at biasing the metrics (direction and amplitude) of spontaneous movements. During low-frequency stimulation, the distribution of saccade metrics was biased toward the direction and amplitude of movements induced by suprathreshold stimulation of the same collicular location. 2. Low-frequency stimulation biased the distribution of saccade metrics but did not initiate movements. The distribution of intervals between stimulation onset and the onset of the next saccade did not differ significantly from the distribution of intervals between an arbitrary point in time and the onset of the next saccade under unstimulated conditions. 3. Results of our second experiment indicate that low-frequency stimulation also influenced the metrics of visually guided saccades. The magnitude of the stimulation-induced bias increased as stimulation current or frequency was increased. 4. The time course of these effects was analyzed by terminating stimulation immediately before, during, or after visually guided saccades. Stimulation trains terminated at the onset of a movement were as effective as stimulation trains that continued throughout the movement. No effects were observed if stimulation ended 40–60 ms before the movement began. 5. These results show that low-frequency collicular stimulation can influence the direction and amplitude of spontaneous or visually guided saccades without initiating a movement. These data are compatible with the hypothesis that the collicular activity responsible for specifying the horizontal and vertical amplitude of a saccade differs from the type of collicular activity that initiates a saccade.

On the Design of Large Elevator Platforms

1949 ◽  
Vol 16 (1) ◽  
pp. 9-18
Author(s):  
F. Hymans
Keyword(s):  
Complex Systems ◽  
Rational Design ◽  
Arbitrary Point ◽  
Reasonable Accuracy ◽  
Flexible Foundation

Abstract Large elevator platforms are, in effect, complex systems of a comparatively few main framing members, coupled by a large number of stringers which support the flooring. As set forth in the paper, and as is qualitatively well known, a load placed on one of the main members is not carried by that member alone. Deflections, impressed by the loaded member on the stringers, induce forces which cause neighboring members to share in the support of the load. However, means to evaluate the distribution of the load with reasonable accuracy, important as it is for a rational design of the platform with the lightest structural shapes, hitherto have not been available. To furnish these is the purpose of the paper. With the aid of two assumptions, and the introduction of certain auxiliary forces, the problem is quickly reduced to the case of a beam, subject to a force at an arbitrary point, supported at its ends, and resting on a flexible foundation.

scholarly journals Study of Power Flow in an IPT System Based on Poynting Vector Analysis

Energies ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 165 ◽  
Author(s):  
Yuan Liu ◽  
Aiguo Hu
Keyword(s):  
Output Power ◽  
Power Distribution ◽  
Power Flow ◽  
Poynting Vector ◽  
Current Source ◽  
Arbitrary Point ◽  
Secondary Coil ◽  
Surface Integral ◽  
Vector Method ◽  
Coupled Coils

This paper analyzes the power distribution and flow of an inductive power transfer (IPT) system with two coupled coils by using the Poynting vector. The system is modelled with a current source flowing through the primary coil, and a uniformly loaded secondary first, then the Poynting vector at an arbitrary point is analyzed by calculating the magnetic and electric fields between and around of the two coils. Both analytical analysis and numerical analysis have been undertaken to show the power distribution, and it has found that power distributes as a donut shape in three-dimensional (3D) space and concentrates along the edges in the proposed two-coil setup, instead of locating coaxially along the center path. Furthermore, power flow across the mid-plane between the two coils is analyzed analytically by the surface integral of the Poynting vector, which is compared with the input power from the primary and the output power to the secondary coil via coupled circuit theory. It has shown that for a lossless IPT system, the power transferred across the mid-plane is equal to the input and output power, which validates the Poynting vector approach. The proposed Poynting vector method provides an effective way to analyze the power distribution in the medium between two coupled coils, which cannot be achieved by traditional lumped circuit theories.

scholarly journals A Fluid Model for a Relay Node in an Ad Hoc Network: Evaluation of Resource Sharing Policies

2008 ◽  
Vol 2008 ◽  
pp. 1-25 ◽  
Author(s):  
Michel Mandjes ◽  
Werner Scheinhardt
Keyword(s):  
Resource Sharing ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Performance Metrics ◽  
Fluid Model ◽  
Waiting Times ◽  
Relay Node ◽  
Arbitrary Point ◽  
Fluid Particle ◽  
Flow Transfer

Fluid queues offer a natural framework for analyzing waiting times in a relay node of an ad hoc network. Because of the resource sharing policy applied, the input and output of these queues are coupled. More specifically, when there are users who wish to transmit data through a specific node, each of them obtains a share of the service capacity to feed traffic into the queue of the node, whereas the remaining fraction is used to serve the queue; here is a free design parameter. Assume now that jobs arrive at the relay node according to a Poisson process, and that they bring along exponentially distributed amounts of data. The case has been addressed before; the present paper focuses on the intrinsically harder case , that is, policies that give more weight to serving the queue. Four performance metrics are considered: (i) the stationary workload of the queue, (ii) the queueing delay, that is, the delay of a “packet” (a fluid particle) that arrives at an arbitrary point in time, (iii) the flow transfer delay, (iv) the sojourn time, that is, the flow transfer time increased by the time it takes before the last fluid particle of the flow is served. We explicitly compute the Laplace transforms of these random variables.

The contrast variation of polychromatic speckle patterns at the far-field diffraction plane

1980 ◽  
Vol 58 (10) ◽  
pp. 1439-1445 ◽  
Author(s):  
Y. Tomita ◽  
K. Nakagawa ◽  
T. Asakura
Keyword(s):  
Radial Distance ◽  
Arbitrary Point ◽  
Far Field ◽  
Gaussian Laser Beam ◽  
Contrast Variation ◽  
Diffraction Plane ◽  
Wide Range ◽  
Speckle Patterns ◽  
Average Contrast ◽  
Good Agreement

The contrast variation of polychromatic speckle patterns at an arbitrary point of the far-field diffraction plane is studied theoretically and experimentally. Gaussian statistics are assumed for the formation of speckles. The average contrast of speckle patterns at the far-field diffraction plane is actually theoretically evaluated and experimentally measured for diffuse objects having a wide range of surface roughnesses under illumination of the polychromatic Gaussian laser beam. This contrast is found to depend strongly on the surface roughness of objects, the number of scattering cells within an illuminated area over the object, and a radial distance from the center of the far-field diffraction plane. Good agreement between the theoretical and experimental results is confirmed.

scholarly journals All-Optical Arbitrary-Point Stable Quadruple Frequency Dissemination With Photonic Microwave Phase Conjugation

2018 ◽  
Vol 10 (4) ◽  
pp. 1-8 ◽  
Author(s):  
Haojie Wang ◽  
Xiaoxiao Xue ◽  
Shangyuan Li ◽  
Xiaoping Zheng
Keyword(s):  
Phase Conjugation ◽  
Arbitrary Point ◽  
All Optical

scholarly journals Evolutionary Cost-cognizant Test Case Selection and Prioritization for Object-Oriented Programs

2019 ◽  
Vol 8 (6S3) ◽  
pp. 149-153
Keyword(s):  
Unit Cost ◽  
Object Oriented ◽  
Arbitrary Point ◽  
Regression Testing ◽  
Test Case ◽  
Test Cases ◽  
Test Case Prioritization ◽  
Integration Testing ◽  
Maximum Benefit ◽  
Regression Test

Test case prioritization (TCP) is a software testing technique that finds an ideal ordering of test cases for regression testing, so that testers can obtain the maximum benefit of their test suite, even if the testing process is stop at some arbitrary point. The recent trend of software development uses OO paradigm. This paper proposed a cost-cognizant TCP approach for object-oriented software that uses path-based integration testing. Path-based integration testing will identify the possible execution path and extract these paths from the Java System Dependence Graph (JSDG) model of the source code using forward slicing technique. Afterward evolutionary algorithm (EA) was employed to prioritize test cases based on the severity detection per unit cost for each of the dependent faults. The proposed technique was known as Evolutionary Cost-Cognizant Regression Test Case Prioritization (ECRTP) and being implemented as regression testing approach for experiment.

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