Love waves are generally less employed than Rayleigh waves in near-surface shear-wave (S-wave) investigations because acquiring S-wave data is not as easy as acquiring P-wave data. The dispersion of Love waves, however, is independent of Poisson’s ratio. This character can be the valuable basis to improve the S-wave velocity imaging. The sensitivity of earth properties to the dispersion curve o...

BACKGROUND The growing population with Fontan operation surviving into adulthood has significant morbidity and mortality rates from recurrent atrial tachyarrhythmias. We hypothesized that the structural characteristics and electrical behavior of atria may differ in these patients compared with those without arrhythmias. METHODS AND RESULTS We studied 33 consecutive patients (age, 25.4+/-9.5 y...

BACKGROUND We investigated the role of 12-lead ECG P-wave duration and dispersion and of Holter monitoring as predictors of post-thoracic surgery atrial fibrillation. METHODS One hundred and five consecutive patients (88 males-17 females; age 60+/-9), undergoing thoracic surgery at National Cancer Institute between 2001 and 2003, were enrolled and both standard ECG and Holter monitoring were ...

Dispersion analysis of discrete solutions to the shallow water equations has been extensively used as a tool to de ne the relationships between frequency and wave number and to determine if an algorithm leads to a dual wave number response and near 2 x oscillations. In this paper, we explore the application of two-dimensional dispersion analysis to cluster based and Galerkin nite element-based ...

ON SLOWLY VARYING STOKES WAVES by VINCENT HWA-HING CHU In this thesis investigations are made on the theory of a train of slowly modulated gravity waves propagating over uneven bottom topography. The primary object is to study the interplay of amplitude dispersion the frequency dispersion in waves on the surface of water where the depth is not too shallow compared to a typical wave length. The ...

OBJECTIVES The precise measurement of fat accumulation in the liver, or steatosis, is an important clinical goal. Our previous studies in phantoms and mouse livers support the hypothesis that, starting with a normal liver, increasing accumulations of microsteatosis and macrosteatosis will increase the lossy viscoelastic properties of shear waves in a medium. This increase results in an increase...

We calculate the antiferromagnetic spin wave dispersion in the half-filled (electronic density n = 1) Hubbard model for a two-dimensional square lattice, using the random phase approximation (RPA) in a broken symmetry (spin density wave) ground state. Our results for the spin wave dispersion, ω(q), are compared with high-resolution inelastic neutron scattering performed on La 2 CuO 4. The effec...

OBJECTIVE To investigate the P wave duration and P wave dispersion in stroke patients, and to compare those with healthy subjects. METHODS We measured maximum and minimum P wave durations, and dispersion on the 12-lead surface ECG in 67 consecutive patients with first ever-acute ischemic stroke and 58 controls at the neurology wards of the Medical School, Duzce, Turkey, between May 2005 and O...

Teleseismic P-wave receiver functions and surface-wave dispersion measurements can be employed to simultaneously infer the shear-wave velocity distribution with depth in the lithosphere. Receiver functions are primarily sensitive to shear-wave velocity contrasts and vertical travel times and surface-wave dispersion measurements are sensitive to vertical shear-wave velocity averages, so that the...