seismic attribute is a quantitative measure of an interested seismic characteristic. there are several seismic attributes. in recent years, time-frequency (tf) attributes have been developed which to reach them, tf analyzing of seismic data is required. a high resolution tf representation (tfr) can yield more accurate tf attributes. there are several tfr methods including short-time fourier tra...

Background Background: The fatty acid composition of the sperm membrane changes drastically during spermatogenesis and may be key to its function. Previous data has shown that intake of long chain poly-unsaturated fatty acids can change the fatty acid composition of tissues, including testes and sperm. However, whether these changes in composition translate into changes in semen quality or male...

Many natural phenomena, including geologic events and geophysical data, are fundamentally nonstationary exhibiting statistical variation that changes in space and time. Time-frequency characterization is useful for analyzing such data, seismic traces in particular. We present a novel time-frequency decomposition, which aims at depicting the nonstationary character of seismic data. The proposed ...

Introduction Analyses of resting-state functional magnetic resonance imaging (fMRI) data typically use approaches that determine the similarity between the time courses of individual image voxels or target regions and reference time courses from seed regions. This can be accomplished either in the time domain (e.g., cross-correlation) or in the frequency domain (e.g., coherence). These approach...

Recent work has demonstrated that adaptive evolution often occurs on contemporary time scales (years to decades), making it of particular relevance to conservation planning (Ashley et al. 2003; Stockwell et al. 2003). Reports of rapid evolution span a variety of species, traits, and situations, suggesting that rapid adaptation is the norm rather than the exception (Hendry & Kinnison 1999; Kinni...

The Regional Atmospheric Chemistry Mechanism (RACM) is a highly revised version of the RADM2 mechanism (RACM; Stockwell et al., 1997). The changes to the inorganic chemistry were relatively minor but there were substantial changes for many organic compounds. These revisions included improvements to the mechanisms for the oxidation of alkanes by HO radical, the ozonolysis of alkenes, the reactio...

Conservation and management tend to emphasize immediate demographic concerns, such as reversing population declines or maximizing productivity. These concerns have long been addressed by reference to ecological processes, but recent work has increasingly pointed to the additional importance of considering evolutionary processes. From the standpoint of conservation, adaptation might influence th...

INTRODUCTION Resting-state functional MRI analysis techniques that determine the similarity between time varying signals of seed and target regions (e.g., by crosscorrelation in the time domain [1,2] and coherence in the frequency domain [3,4]) assume the signals are stationary. However, the resting-state is neither a static phenomenon nor is reproducible [5]; it varies greatly within and betwe...