نتایج جستجو برای: electric field

تعداد نتایج: 891249  

2009
P. G. Buschhorn

We report on a measurement of excess electron drift properties in liquid argon in the presence of crossed electric and magnetic fields. The electric field strength was varied between 6 and 110 V/cm. Using a superconducting solenoid magnetic field strengths up to 5 T were achieved. The mag_netic field 8 was oriented perpendicular to the electric field E and the components of the drift velocity G...

Journal: :Vojnosanitetski pregled 2016
Raimondas Buckus Birute Strukcinskiene Juozas Raistenskis Rimantas Stukas

BACKGROUND/AIM Electromagnetic field exposure is the one of the most important physical agents that actively affects live organisms and environment. Active use of mobile phones influences the increase of electromagnetic field radiation. The aim of the study was to measure and assess the electric field strength caused by mobile phones to the human head. METHODS In this paper the software "COMS...

2005
Nikolas Hoepker

Theory The optical properties of a molecule are obtained from its response to a perturbing electric field. In our case, the electric field is chosen to be a step function E(t) = E0 1−θ(t) ( ) (1.) where θ(t) is the unit step function. The perturbing field displaces the electrons of the molecule, which gives rise to a time varying electric dipole by means of which optical properties can be obtai...

2003
B. Breech W. H. Matthaeus L. J. Milano C. W. Smith

[1] The low-frequency induced electric field in the near-Earth interplanetary medium is investigated observationally. These electric field fluctuations are associated with magnetohydrodynamic-scale fluctuations of the magnetic field and plasma velocity. Results of the study, based upon hourly samples with variations computed relative to 4-day means, indicate that the electric field distribution...

2017
Hui Ye

Background: Cellular biomechanics can be manipulated by strong electric fields, manifested by the field-induced membrane deformation and migration (galvanotaxis), which significantly impacts normal cellular physiology. Artificial giant vesicles that mimic the phospholipid bilayer of the cell membrane have been used to investigate the membrane biomechanics subjected to electric fields. Under a s...

Journal: :The Journal of chemical physics 2004
Satyavani Vemparala Rajiv K Kalia Aiichiro Nakano Priya Vashishta

Effects of electric field on the structure of poly(ethylene glycol) (PEG) terminated alkanethiol self-assembled monolayer (SAM) on gold have been studied using parallel molecular dynamics method. An applied electric field triggers a conformational transition from all-trans to a mostly gauche conformation. The polarity of the electric field has a significant effect on the surface structure of PE...

2013
Charlie Huveneers Paul J. Rogers Jayson M. Semmens Crystal Beckmann Alison A. Kock Brad Page Simon D. Goldsworthy

Elasmobranchs can detect minute electromagnetic fields, <1 nV cm(-1), using their ampullae of Lorenzini. Behavioural responses to electric fields have been investigated in various species, sometimes with the aim to develop shark deterrents to improve human safety. The present study tested the effects of the Shark Shield Freedom7™ electric deterrent on (1) the behaviour of 18 white sharks (Carch...

Mohammad Nabi Sarbolouki Nadia Javadian

This articles is comprised of two parts: a) an experimental investigation on the behavior of an acrylic gel under DC electric field and b) a physico - mathematical description.a) Gel rods made of poly [acrylamide-co-bisacrylamide] were partially hydrolyzed to different extents at pH 12 by teteramethylethylene diamine. Equlibrium properties of the resulting gels rods (water content,...

2017
Jian-Min Zhang Ruqian Lian Yanmin Yang Guigui Xu Kehua Zhong Zhigao Huang

External electric field control of topological surface states (SSs) is significant for the next generation of condensed matter research and topological quantum devices. Here, we present a first-principles study of the SSs in the magnetic topological insulator (MTI) Cr-doped Bi2Se3 under external electric field. The charge transfer, electric potential, band structure and magnetism of the pure an...

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