Unusual electric response of the dislocations and the impurity dipoles in KNbO3single crystals

1995 ◽  
Vol 78 (1) ◽  
pp. 104-110 ◽  
Author(s):  
S. G. Ingle ◽  
R. N. Kakde
Keyword(s):  
Electric Response ◽  
Impurity Dipoles

Compact Energy Measuring System for Short Pulse Lasers

2013 ◽  
Vol 20 (2) ◽  
pp. 183-190 ◽  
Author(s):  
A. Barna ◽  
I. B. Földes ◽  
Z. Gingl ◽  
R. Mingesz
Keyword(s):  
Short Pulse ◽  
Electronic Devices ◽  
Laser Pulses ◽  
Measuring System ◽  
Electric Response ◽  
Usb Interface ◽  
Radiated Noise ◽  
Fiber Optical ◽  
Measurement Control ◽  
Short Pulse Lasers

Abstract In experiments with short-pulse lasers the measurement control of the energy of the laser pulse is of crucial importance. Generally it is difficult to measure the amplitude of the pulses of short-pulse lasers using electronic devices, their response time being longer than the duration of the laser pulses. The electric response of the detector is still too fast to be directly digitized therefore a peak-hold unit can be used to allow data processing for the computer. In this paper we present a device which measures the energy of UV short (fs) pulses shot-byshot, digitizes and sends the data to the PC across an USB interface. The circuit is based on an analog peak detect and hold unit and the use of fiber optical coupling between the PC and the device provides a significant improvement to eliminate potential ground loops and to reduce conductive and radiated noise as well. The full development is open source and has been made available to download from our web page (http://www.noise.inf.u-szeged.hu/Instruments/PeakHold/).

Tuning the Electric Field Response of MOFs by Rotatable Dipolar Linkers

2019 ◽  
Author(s):  
Johannes P. Dürholt ◽  
Babak Farhadi Jahromi ◽  
Rochus Schmid
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Structural Changes ◽  
Dielectric Behavior ◽  
Two Dimensions ◽  
Dielectric Constants ◽  
Electric Response ◽  
Dipole Strength ◽  
Metal Organic ◽  
Dynamics Simulations

Recently the possibility of using electric fields as a further stimulus to trigger structural changes in metal-organic frameworks (MOFs) has been investigated. In general, rotatable groups or other types of mechanical motion can be driven by electric fields. In this study we demonstrate how the electric response of MOFs can be tuned by adding rotatable dipolar linkers, generating a material that exhibits paralectric behavior in two dimensions and dielectric behavior in one dimension. The suitability of four different methods to compute the relative permittivity κ by means of molecular dynamics simulations was validated. The dependency of the permittivity on temperature T and dipole strength μ was determined. It was found that the herein investigated systems exhibit a high degree of tunability and substantially larger dielectric constants as expected for MOFs in general. The temperature dependency of κ obeys the Curie-Weiss law. In addition, the influence of dipolar linkers on the electric field induced breathing behavior was investigated. With increasing dipole moment, lower field strength are required to trigger the contraction. These investigations set the stage for an application of such systems as dielectric sensors, order-disorder ferroelectrics or any scenario where movable dipolar fragments respond to external electric fields.

scholarly journals Picosecond and Nanosecond Components in Bacteriorhodopsin Light-Induced Electric Response Signal

1988 ◽  
Vol 54 (1) ◽  
pp. 77-80 ◽  
Author(s):  
G.I. Groma ◽  
F. Ráksi ◽  
G. Szabó ◽  
G. Váró
Keyword(s):  
Electric Response ◽  
Response Signal

Low frequency electromagnetic radiation and hearing

2009 ◽  
Vol 123 (11) ◽  
pp. 1204-1211 ◽  
Author(s):  
J Morales ◽  
M Garcia ◽  
C Perez ◽  
J V Valverde ◽  
C Lopez-Sanchez ◽  
...  
Keyword(s):  
Guinea Pig ◽  
Electromagnetic Fields ◽  
Control Animal ◽  
Guinea Pigs ◽  
Low Frequency ◽  
Organ Of Corti ◽  
Outer Hair Cells ◽  
Morphological Alteration ◽  
Electric Response ◽  
Hearing Level

AbstractObjective:To analyse the possible impact of low and extremely low frequency electromagnetic fields on the outer hairs cells of the organ of Corti, in a guinea pig model.Materials and methods:Electromagnetic fields of 50, 500, 1000, 2000, 4000 and 5000 Hz frequencies and 1.5 µT intensity were generated using a transverse electromagnetic wave guide. Guinea pigs of both sexes, weighing 100–150 g, were used, with no abnormalities on general and otic examination. Total exposure times were: 360 hours for 50, 500 and 1000 Hz; 3300 hours for 2000 Hz; 4820 hours for 4000 Hz; and 6420 hours for 5000 Hz. One control animal was used in each frequency group. The parameters measured by electric response audiometer included: hearing level; waves I–IV latencies; wave I–III interpeak latency; and percentage appearance of waves I–III at 90 and 50 dB sound pressure level intensity.Results:Values for the above parameters did not differ significantly, comparing the control animal and the rest of each group. In addition, no significant differences were found between our findings and those of previous studies of normal guinea pigs.Conclusion:Prolonged exposure to electromagnetic fields of 50 Hz to 5 KHz frequencies and 1.5 µT intensity, produced no functional or morphological alteration in the outer hair cells of the guinea pig organ of Corti.

Influence of Capillary Effects on Electric Response of Well-Ordered Carbon Nanotube Film

Langmuir ◽  
2017 ◽  
Vol 33 (47) ◽  
pp. 13496-13503 ◽  
Author(s):  
Quan Zhang ◽  
Peng Meng ◽  
Ruiting Zheng ◽  
Xiaoling Wu ◽  
Guoan Cheng
Keyword(s):  
Carbon Nanotube ◽  
Electric Response ◽  
Capillary Effects ◽  
Carbon Nanotube Film

Datenfern�bertragung in der Electric Response Audiometry (ERA)

1982 ◽  
Vol 235 (2-3) ◽  
pp. 539-541
Author(s):  
R. -D. Battmer ◽  
E. Lehnhardt
Keyword(s):  
Electric Response ◽  
Electric Response Audiometry

Detecting degradation in reinforced concrete subjected to uniaxial compression, using the parameters of electric response to mechanical impact

2018 ◽  
Vol 30 (6) ◽  
pp. 317-333
Author(s):  
Tatyana V. Fursa ◽  
Gregory E. Utsyn ◽  
Maxim Petrov ◽  
Denis D. Dann ◽  
Alexey N. Sokolovskiy
Keyword(s):  
Reinforced Concrete ◽  
Uniaxial Compression ◽  
Electric Response ◽  
Mechanical Impact

The induced surface electric response in Europe to 2015 St. Patrick's Day geomagnetic storm

2018 ◽  
Vol 180 ◽  
pp. 106-115 ◽  
Author(s):  
C. Demetrescu ◽  
V. Dobrica ◽  
R. Greculeasa ◽  
C. Stefan
Keyword(s):  
Geomagnetic Storm ◽  
Electric Response

Nonlinear electric response of YBa 2Cu4O8 ceramics at the inter-grain superconductive ordering

1998 ◽  
Vol 177-181 ◽  
pp. 179-180 ◽  
Author(s):  
T. Yamao ◽  
M. Hagiwara ◽  
M. Matsuura ◽  
K. Koyama
Keyword(s):  
Electric Response
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