Fluctuation Spectra of Wavefields in Geophysics

Density Fluctuation Spectra in Magnetohydrodynamic Turbulence

It is shown that within the framework of nearly incompressible magnetohydrodynamics, but not within that of neutral-fluid hydrodynamics, a k -5/3 inertial-range wave number density fluctuation spectrum is to be expected at the same times that k -5/3 kinetic energy and magnetic energy cascade spectra are present. A previous discrepancy between theory and observation in the local interstellar med...

Reciprocity of tensor wavefields

If reciprocity principles are invoked in seismic data processing algorithms, one has to make sure that those processes maintain reciprocity. I outline briefly the derivation of reciprocity principles for elastic wave equations and show that discretized or approximated wave equations can lose symmetry properties and thus reciprocities. This effect is important if one is concernd about true-ampli...

modularity of reading comprehension in multiple-choice cloze procedure and reliability fluctuation

هدف این رساله تحقیق در مورد یافتن ارتباط بین واحدهای درک مطلب (از قبیل پروسه واژگانی، پروسه ساختاری و پروسه تفسیر معنایی) از طریق تست کلوز چهار چوابی در بین دانشجویان سال آخر رشته زبان انگلیسی میباشد. در مرحله اول از 150 دانشجو (80 مونث و 70 مذکر) از بین دانشجویان کارشناسی و کارشناسی ارشد دانشگاههای علامه طباطبائی، دانشگاه شهید بهشتی و دانشگاه آزاد اسلامی واحد شمال تست نلسون (450 دی) گرفته شد. ...

Interpretation of fluctuation spectra in lipid bilayer simulations.

Atomic resolution and coarse-grained simulations of dimyristoylphosphatidylcholine lipid bilayers were analyzed for fluctuations perpendicular to the bilayer using a completely Fourier-based method. We find that the fluctuation spectrum of motions perpendicular to the bilayer can be decomposed into just two parts: 1), a pure undulation spectrum proportional to q(-4) that dominates in the small-...

Interpretation of Fluctuation Spectra in Lipid Bilayer Simulations Supporting Material