نتایج جستجو برای: piezo magnetic face sheets
تعداد نتایج: 524320 فیلتر نتایج به سال:
Phase modulation at 125 kHz in a Michelson interferometer using an inexpensive piezoelectric stack driven at resonance. Fast phase modulation has been achieved in a Michelson interferometer by attaching a lightweight reference mirror to a piezoelectric stack and driving the stack at a resonance frequency of about 125 kHz. The electrical behavior of the piezo stack and the mechanical properties ...
We present case examples of foreshock density holes and results from a statistical survey, which provide additional characterizations of these recently-described structures. Specific effort is made to place these objects into context with well-studied foreshock phenomena, such as hot flow anomalies (HFAs) and large-amplitude magnetic pulsations (SLAMS). Density holes are observed during highert...
Finite element models of increasing accuracy are proposed for the study of the capacitive behaviour of wound magnetic components. Simple models, which are based on the classical assumption of a decoupling between electric and magnetic fields, are first described. Formulations which enable such a coupling are then presented. The models are tested on various coreless inductors, made of round cond...
The removal of crystal violet from aqueous solution by NiFe2O4 magnetic nanoparticles treated with sodium dodecyl sulfate was investigated. The modified magnetic nanoparticles were prepared by chemical reaction of a mixture of Ni+2 and Fe+3 ions mixture in aqueous solution at the presence of ammonia and then sodium dodecyl sulfate was utilized as an ionic surfactant to modified the obtained mag...
We investigate theoretically and demonstrate experimentally, the effect of material geometric periodicity in face sheets on overall dynamics sandwich beams. By treating two core as separate entities using classic plate theory (CPT), conjunction with Bloch theorem, solving governing equations transfer matrix method (TMM) generalized differential quadrature (GDQM), we obtain a low-frequency \text...
This investigation studies the various magnetic behaviors of graphene oxide (GO) and reduced graphene oxides (rGOs) and elucidates the relationship between the chemical states that involve defects therein and their magnetic behaviors in GO sheets. Magnetic hysteresis loop reveals that the GO is ferromagnetic whereas photo-thermal moderately reduced graphene oxide (M-rGO) and heavily reduced gra...
We study the spontaneous formation of a current sheet (CS) in an x-invariant y-symmetric magnetic field B(y, z, t) occupying the half-space {z > 0}, and embedded in a pressureless perfectly conducting plasma. At the initial time t = 0, B(y, z, 0) is potential and quadrupolar, and therefore its lines in a poloidal plane have a complex topology: there is either one separatrix, which contains a ne...
5 TGD inspired theory of braid cobordisms and 2-knots 7 5.1 Weak form of electric-magnetic duality and duality of space-like and time-like braidings 7 5.2 Could Kähler magnetic fluxes define invariants of braid cobordisms? . . . . . . . . . . 8 5.3 Classical color gauge fields and their generalizations define gerbe gauge potentials allowing to replace Wilson loops with Wilson sheets . . . . . ....
This report describes the spontaneous folding of flat elastomeric sheets, patterned with magnetic dipoles, into free-standing, 3D objects that are the topological equivalents of spherical shells. The path of the self-assembly is determined by a competition between mechanical and magnetic interactions. The potential of this strategy for the fabrication of 3D electronic devices is demonstrated by...
IN THE process of conducting a broad range exploratory study of children born to women in state psychiatric hospitals, our data showed there were 343 babies born to schizophrenic women patients in Michigan’s six state hospitals between 1925 and 1964. It was somewhat surprising to find that of these, 148 were male and 186 were female. There were nine whose sex was unrecorded and could not be lea...
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