HF chirps: Eigenmode trapping in density depletions

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Trapping of lower hybrid waves in elongated plasma depletions in the Earth’s ionosphere

Conditions for trapping of lower hybrid waves in plasma depletions in the Earth’s ionosphere are discussed. It is shown that the trapping can take place for the frequencies not only below but also above the lower hybrid resonance frequency of the background plasma, which is important for the formation of the downshifted maximum of the secondary electromagnetic emission. © 2007 Elsevier B.V. All...

متن کامل

Density estimation in live-trapping studies

Unbiased estimation of population density is a major and unsolved problem in animal trapping studies. This paper describes a new and general method for estimating density from closed-population capture /recapture data. Many estimators exist for the size (N) and mean capture probability (p̄) of a closed population. These statistics suffer from an unknown bias due to edge effect that varies with t...

متن کامل

Eigenmode Analysis of Eddy Currents and Eigenmode Coil Design

Introduction Eddy currents have long been the bane of MRI. Particularly since the mid 1980s when imaging sequences became more rapid [1] and superconducting magnets became routinely used. When gradient coils are switched rapidly, eddy currents are induced in the cryostat vessel and other surrounding conducting structures. Two principal solutions have been adopted into standard practice for deal...

متن کامل

Time-frequency and chirps

Chirps (i.e., transient AM-FM waveforms) are ubiquitous in nature and man-made systems, and they may serve as a paradigm for many nonstationary deterministic signals. The time-frequency plane is a natural representation space for chirps, and we will here review a number of questions related to chirps, as addressed from a time-frequency perspective. Global and local approaches will be described ...

متن کامل

Enumerating Graph Depletions

Let G be a simple, connected graph with finite vertex set V and edge set E . A depletion of G is a permutation v1v2v3 . . . vn of the elements of V with the property that vi is adjacent to some member of {v1, v2, · · · , vi°1} for each i ∏ 2. Depletions model the spread of a rumor or a disease through a population and are related to heaps. In this paper we develop techniques for enumerating the...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Geophysical Research Letters

سال: 2000

ISSN: 0094-8276

DOI: 10.1029/1999gl003655