We report on our analysis of a 300 ks observation of the Vela pulsar with the Rossi X-Ray Timing Explorer (RXTE). The doublepeaked, pulsed emission at 2 30 keV, which we had previously detected during a 93 ks observation, is confirmed with much improved statistics. There is now clear evidence, both in the spectrum and the light curve, that the emission in the RXTE band is a blend of two separat...

To elucidate a quantum phase transition (QPT) in Bi(2)Sr(2-x)La(x)CuO(6+delta), we measure charge and heat transport properties at very low temperatures and examine the following characteristics for a wide range of doping: normal-state resistivity anisotropy under 58 T, temperature dependence of the in-plane thermal conductivity kappa(ab), and the magnetic-field dependence of kappa(ab). It turn...

This paper completes the proof of the Lp-boundedness of bilinear operators associated to nonsmooth symbols or multipliers begun in Part I, our companion paper [8], by establishing the corresponding Lp-boundedness of time-frequency paraproducts associated with tiles in phase plane. The affine invariant structure of such operators in conjunction with the geometric properties of the associated pha...

The occurrence of a big smash singularity which ends the universe in a finite time in the future is investigated in the context of superquintessence, i.e. dark energy with effective equation of state parameter w < −1 and Ḣ > 0. The simplest toy model of superquintessence based on a single nonminimally coupled scalar field exhibits big smash solutions which are attractors in phase space.

Phase 1: Study a significant number of maintainers to thoroughly understand the nature of their work. This paper investigates the questions to ask in such a study. A companion paper [1] discusses some methods by which the questions can be answered. Phase 2: Develop and evaluate tools to help the maintainers work better. This work will be based on what we learn from phase 1, as well as ongoing i...

Pylkkänen (2001) argues that there are two types of applicatives, which have different lexical semantics. I will show that this difference underlies the contrast between (1) and (2), and argue that the two applicatives have different syntactic ‘phase’ structures (Chomsky 1999, 2000). Phases are chunks of syntactic structure that are sent off to PF and LF for interpretation before the derivation...

We study networks of coupled phase oscillators and show that network architecture can force relations between average frequencies of the oscillators. The main tool of our analysis is the coupled cell theory developed by Stewart, Golubitsky, Pivato, and Török, which provides precise relations between network architecture and the corresponding class of ODEs in RM and gives conditions for the flow...

linear matrix equations arising in phase type queues. Stochastic Models, 1:29{52, 1985. [17] D. Mitra. Stochastic theory of a uid model of producers and consumers coupled by a buer.

Starting from the assumption that ferromagnetically correlated regions exist in manganites even in the absence of long-range magnetic order, we construct a model of charge transfer due to the spin-dependent tunnelling of charge carriers between such regions. This model allows us to analyze the temperature and magnetic field dependence of resistivity, magnetoresistance, and magnetic susceptibili...

We present an example of a complete and minimal Gabor system consisting of time-frequency shifts of a Gaussian, localized at the coordinate axes in the time-frequency plane (phase space). Asymptotically, the number of time-frequency shifts contained in a disk centered at the origin is only 2/π times the number of points from the von Neumann lattice found in the same disk. Requiring a certain re...