Electroplasticity in AZ31B subjected to short-duration high-frequency pulsed current

2019 ◽  
Vol 125 (18) ◽  
pp. 185104 ◽  
Author(s):  
Jingyi Zhao ◽  
Zhencheng Ren ◽  
Hao Zhang ◽  
Guo-Xiang Wang ◽  
Yalin Dong ◽  
...  
Keyword(s):  
Short Duration ◽  
High Frequency ◽  
Pulsed Current

scholarly journals Evidence of Information Asymmetry and Herding Behaviour – The Swiss Franc Unpegging Event in Perspective

2020 ◽  
Vol 19 (3) ◽  
pp. 59-77
Author(s):  
Shruti Garg
Keyword(s):  
Information Asymmetry ◽  
Short Duration ◽  
High Frequency ◽  
Swiss Franc ◽  
High Frequency Data ◽  
Frequency Data ◽  
Indian Market ◽  
Causality Test ◽  
Financial Events ◽  
The Impact

The paper aims to find the impact of financial events that occurred in one country on another. Taking the case of the Swiss Franc Unpegging of 2015 in Switzerland, the paper observes its impact on the Indian economy. This is done by studying the information asymmetry and herding behaviour in Indian market on the day of the event. The study uses two sets of data, (i) high frequency data and (ii) 3 years index data of both countries. The Ganger Causality test has been conducted to study the cause and effect relationship between the economies, which helps determine the impact on any of the countries. The study found that herding behaviour and information asymmetry in Indian market are now linked to each other in such a way that the country is affected even if the event has not occurred in the economy itself, however, only for a short duration of time. There also seems to be a huge gap between information available amongst all investors.

scholarly journals Two-Phase Resonant Converter to Drive High-Power LED Lamps

Electronics ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 53 ◽  
Author(s):  
Christian Brañas ◽  
Rosario Casanueva ◽  
Francisco J. Díaz ◽  
Francisco J. Azcondo
Keyword(s):  
Dynamic Response ◽  
High Power ◽  
High Frequency ◽  
Pulsed Current ◽  
Resonant Converter ◽  
Two Phase ◽  
Street Lighting ◽  
Spice Model ◽  
Flicker Effect ◽  
Output Filter

This paper presents the design and modeling of a two-phase resonant converter that drives a LED lamp with a high-frequency pulsed current free of instabilities and flicker effect, fulfilling the recommendations of the IEEE PAR 1789-2015, so that it enables visible light-based communication at a 10 kB/s bit rate. The dynamic study of the converter takes into consideration the effect of the reflected impedance of the output filter on the AC side. In order to evaluate the dynamic response of the converter, a Spice model is defined. A 120 W prototype intended for street lighting applications has been built to validate the analysis and modeling.

New Mechanism That Accounts for Position Sensitivity of Saccades Evoked in Response to Stimulation of Superior Colliculus

1998 ◽  
Vol 80 (6) ◽  
pp. 3373-3379 ◽  
Author(s):  
A. K. Moschovakis ◽  
Y. Dalezios ◽  
J. Petit ◽  
A. A. Grantyn
Keyword(s):  
Electrical Stimulation ◽  
Eye Movements ◽  
Superior Colliculus ◽  
Short Duration ◽  
High Frequency ◽  
Initial Position ◽  
Characteristic Vector ◽  
Extraocular Motoneurons ◽  
Position Sensitivity ◽  
Stimulation Of

Moschovakis, A. K., Y. Dalezios, J. Petit, and A. A. Grantyn. New mechanism that accounts for position sensitivity of saccades evoked in response to stimulation of superior colliculus. J. Neurophysiol. 80: 3373–3379, 1998. Electrical stimulation of the feline superior colliculus (SC) is known to evoke saccades whose size depends on the site stimulated (the “characteristic vector” of evoked saccades) and the initial position of the eyes. Similar stimuli were recently shown to produce slow drifts that are presumably caused by relatively direct projections of the SC onto extraocular motoneurons. Both slow and fast evoked eye movements are similarly affected by the initial position of the eyes, despite their dissimilar metrics, kinematics, and anatomic substrates. We tested the hypothesis that the position sensitivity of evoked saccades is due to the superposition of largely position-invariant saccades and position-dependent slow drifts. We show that such a mechanism can account for the fact that the position sensitivity of evoked saccades increases together with the size of their characteristic vector. Consistent with it, the position sensitivity of saccades drops considerably when the contribution of slow drifts is minimal as, for example, when there is no overlap between evoked saccades and short-duration trains of high-frequency stimuli.

The peripheral auditory characteristics of noctuid moths: responses to the search-phase echolocation calls of bats

1996 ◽  
Vol 199 (4) ◽  
pp. 847-856 ◽  
Author(s):  
D Waters ◽  
G Jones
Keyword(s):  
Short Duration ◽  
High Frequency ◽  
Temporal Structure ◽  
Temporal Integration ◽  
Agrotis Segetum ◽  
Integration Time ◽  
Constant Frequency ◽  
Low Intensity ◽  
Long Duration ◽  
The Central Nervous System

The noctuid moths Agrotis segetum and Noctua pronuba show peak auditory sensitivity between 15 and 25 kHz, and a maximum sensitivity of 35 dB SPL. A. segetum shows a temporal integration time of 69 ms. It is predicted that bats using high-frequency and short-duration calls will be acoustically less apparent to these moths. Short-duration frequency-modulated (FM) calls of Plecotus auritus are not significantly less acoustically apparent than those of other FM bats with slightly longer call durations, based on their combined frequency and temporal structure alone. Long-duration, high-frequency, constant-frequency (CF) calls of Rhinolophus hipposideros at 113 kHz are significantly less apparent than those of the FM bats tested. The predicted low call apparency of the 83 kHz CF calls of R. ferrumequinum appears to be counteracted by their long duration. It is proposed that two separate mechanisms are exploited by bats to reduce their call apparency, low intensity in FM bats and high frequency in CF bats. Within the FM bats tested, shorter-duration calls do not significantly reduce the apparency of the call at the peripheral level, though they may limit the amount of information available to the central nervous system.

On the Effect of Cardboard Liners on Impact-Induced High Frequency Vehicular Driveline Vibrations

2007 ◽  
Author(s):  
Stephanos Theodossiades ◽  
Homer Rahnejat ◽  
Patrick Kelly
Keyword(s):  
Short Duration ◽  
High Frequency ◽  
Modern Trend ◽  
Component Level ◽  
Contact Behaviour ◽  
Foam Filled ◽  
High Frequency Vibrations ◽  
Metallic Wires ◽  
Noise Vibration ◽  
Fea Analysis

A typical driveline Noise, Vibration and Harshness (NVH) spectrum contains the contribution of a significant number of vibration components, ranging from a few Hz to several kHz. This is due to different NVH phenomena that have their causes in the contact behaviour of discrete driveline components. A short duration, audible, high frequency, elastoacoustic phenomenon, which occurs as a load reversal in the presence of lashes in the driveline, is onomatopoeically known in industry as clonk (300–5,000 Hz). Its short duration acts as an impulse that excites a large number of structural modes of the lightly damped driveline system. The above phenomenon has become a major concern to automobile manufacturers in recent years with the modern trend of reducing inertial effects in powertrain systems by use of materials of lower elastic moduli and thinner sections. The most common approach in industry to reduce the radiated clonk noise is by using palliatives, such as metallic wires, foam-filled driveshafts, the Dual Mass Flywheel (DMF) and cardboard liners. However, the mechanisms of vibration and noise reduction that the above palliatives introduce have not been fully understood yet, as these are rather used in an empirical manner. This paper investigates the effect of cardboard liners on the high frequency driveline response, by a combined study of FEA analysis at component level and experimental measurements in a drivetrain rig. The results reveal that cardboard liners reduce the severity of the driveline high frequency vibrations, as well as the number of the driveshafts’ structural modes that are excited by remote impacting of the drivetrain components through their lash zones. The predicted and observed effect of the cardboard liners shows good conformance with the existing literature.

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