Introduction: Myocardial viability assessment is crucial in prognostic stratification and therapeutic decision making for patients after acute myocardial infarction. MRI has shown high capability in viability assessment, also compared to current clinical tools. Purpose: To define contrast enhanced (CE) MRI role in functional recovery prediction after acute myocardial infarction. Methods: 43 con...

any 3d seismic survey can have an acquisition footprint. acquisition footprint is an expression of the surface geometry (most common on land data) that leaves an imprint on the stack of 3d seismic data. often we recognize it as amplitude and phase variations on time slices, which of course display the amplitudes within our data set at a specified two way time (cordsen, 2004). on the other hand,...

56 COPUBLISHED BY THE IEEE COMPUTER AND RELIABILITY SOCIETIES ■ 1540-7993/09/$26.00 © 2009 IEEE ■ SEPTEMBER/OCTOBER 2009 Moreover, these online identity systems could provide greater protections for security and privacy than we currently achieve when using documents to prove identity in the physical world. As I mentioned earlier, online identity management systems are important if we’re to addr...

Page 1 of 7 To say that information visualization is still a young and evolving fi eld is a considerable understatement. We are still only scratching the surface of its potential. As the science on which it is built continues to yield new insights and an increasing number of talented and innovative people apply these insights in search of new solutions, we can expect eye-opening progress in the...

Worse, more complex problems such as race conditions and subtle design errors wait in the wings for the buffer overflow’s demise. Software security problems will be with us for years, and hackers will continue to exploit systems via software defects. Clearly, a central and critical aspect of the computer security problem resides in software. Software security—the idea of engineering software th...

S teven Levy’s fascinating 2001 book Crypto has the subtitle How the Code Rebels Beat the Government, Saving Privacy in the Digital Age.1 The “code rebels”—a loose coalition of academics, hobbyists, and civil-liberties organizations— did indeed beat the government, causing the earlier restrictions on distribution of cryptographic tools to be largely abandoned. However, this victory seems to hav...

  Effects of visual deprivation on the induction of epileptiform activity were studied in layer II/III of mature rat primary visual cortex. Field potentials were evoked by stimulation of layer IV in slices from control and dark-reared (OR) rats. Picrotoxin (PTX)-induced epileptic activity was characterized by spontaneous and evoked epileptic field potentials (EFPs). The results showed that OR s...

the exact developmental origin of microglia is still under debate. in the present study we investigated which heamatopoietic tissues and which features of the organotypic brain slice culture promoted microglia ramification. the potential of cells derived from embryonic yolk sac, embryonic aorta-gonad-mesonephros and adult blood monocytes was examined. these tissues were co-cultured with brain s...

We address the issue of hedging in in nite horizon markets under cone constraints on the number of shares of assets. We show that the minimum cost of hedging a liability stream is equal to its largest present value with respect to admissible stochastic discount factors, thus can be determined without nding an optimal hedging strategy. We develop an algorithm by which an optimal portfolio in one...

This note discusses the peridynamic horizon (the nonlocal region around a material point), its role, and practical use in modeling. The objective is to eliminate some misunderstandings and misconceptions regarding the peridynamic horizon. An example of crack branching in a nominally brittle material (homalite) is addressed and we show that crack branching takes place without wave interaction. W...