There are three general methods that can be used to determine formation velocities from full waveform logs. The first approach is to make use of the data from the entire waveform. This type of velocity analysis is performed either in the frequency domain (I.e. f-k analysis or the two station method) or in the time domain (I.e. velocity spectral analysis). The second approach is to identify the ...

In disordered vortices in p-wave superconductors the two new random-matrix ensembles may be realized: B and DIII-odd (of so(2N + 1) and so(4N + 2)/u(2N + 1) matrices respectively). We predict these ensembles from an explicit analysis of the symmetries of Bogoliubov– deGennes equations in three examples of vortices with different p-wave order parameters. A characteristic feature of the novel sym...

– Recently the superconducting gap functions of the skutterudite PrOs4Sb12 have been proposed [K. Maki et al, Europhys. Lett. 68, 720 (2004)]. The superconductivity is spin-triplet and consists of at least 2 distinct phases in a magnetic field, which bears some resemblance to superfluid 3 He. Here we present our analysis of the thermodynamic properties of these two superconducting states within...

The role of aerogel as a means of introducing correlated disorder into superfluid He is examined in this paper. The aerogel structure is described by a diffusion-limited cluster aggregation model and compared to the results of small-angle x-ray scattering obtained from samples that were used to study the suppression of Tc as well as the development of the superfluid fraction. These results high...

OBJECTIVES The purpose of this study was to perform a detailed analysis of the P-wave morphology (PWM) in focal atrial tachycardia (AT) and construct and prospectively evaluate an algorithm for identification of the anatomic site of origin. BACKGROUND Although smaller studies have described the PWM from particular anatomic locations, a detailed algorithm characterizing the likely location of a ...

Well-known difficulties in defining P-wave onset and offset may restrict the accuracy and reproducibility of P-wave dispersion measurements. To achieve greater precision in measuring P-wave dispersion, simultaneous digital recording of all 12 ECG leads and onscreen measurement of P wave characteristics is mandatory to examine atrial fibrillation risk.

We discuss the double spin asymmetries in P-wave charmonium hadroproduction with non-zero transverse momenta at fixed target energies, √ s ≃ 40 GeV, within the framework of the factorization approach. The size of the asymmetries and the projected statistical errors in a future option of HERA with longitudinally polarized protons scattering off a polarized target (HERA-N) are calculated. Measure...

are very few reports on it involving patients with symptomatic cardiac disease. However, little has been reported on this entity during the perioperative period. Not long ago, we reported the case of a 61-year-old woman scheduled for an orthopedic procedure under spinal anesthesia. Spontaneous changes in P wave polarity were detected intraoperatively, although the patient was asymptomatic and t...

Automatic detection of atrial activity (P waves) in an electrocardiogram (ECG) is a crucial task to diagnose the presence of arrhythmias. The P wave is difficult to detect and most of the approaches in the literature have been evaluated on normal sinus rhythms and rarely considered arrhythmia contexts other than atrial flutter and fibrillation. A novel knowledge-based P wave detector algorithm ...