OBJECTIVE To assess differences in the accuracy of automatic QT measurement in three subject groups, and to determine the influence of T wave amplitude on these measurements. SUBJECTS Standard simultaneous 12 lead electrocardiograms were acquired from 25 patients post myocardial infarction, 25 with arrhythmias, and 25 controls. DESIGN Because there is not yet a standard automatic method for...

The effectiveness of helmets in extenuating the primary shock waves generated by the explosions of improvised explosive devices is not clearly understood. In this work, the role of helmet on the overpressurisation and impulse experienced by the head were examined. The shock wave-head interactions were studied under three different cases: (i) unprotected head, (ii) head with helmet but with vary...

The isolated arterially perfused eye preparation has proven to be comparable to the in vivo model in many respects. However, the existence of "supernormal" b-wave amplitudes in the perfused eyes has remained an unexplained functional difference between the two preparations. The term "supernormal" reflected the observation that at high perfusate flow rates the amplitude of the b-wave from the pe...

[1] The ‘‘Advanced Regional Prediction System’’ forecast model is extended up to the stratopause and over the entire hemisphere to simulate gravity waves during 24 January 2005. With a 15-km horizontal resolution, the simulation produces dominant gravity wave features near Eastern Greenland that are associated mainly with orographic forcing by the Greenland terrain. The simulated wave temperatu...

It is well-established that processes involving changing direction or turning in which either both standing and walking turns are utilized involve coordination of the whole-body stepping characteristics. However, turn context have not been fully explored during different amplitudes. For these reasons, this present study aimed to determine effects amplitude on coordination. The findings from can...

The analog of the Cachazo Svrček Witten rules for scattering amplitudes with massive quarks is derived following an approach previously employed for amplitudes with massive scalars. A prescription for the external wave-functions is given that leads to a one-to-one relation between fields in the action and spin-states of massive quarks. Several examples for the application of the rules are given...

Pion-photoproduction data is examined to check for the nucleon-helicity conservation predicted by asymptotic QCD. The differential cross section shows agreement with constituent-counting rules, and polarization data is not in disagreement with conservation of nucleon helicity. However large uncertainties in the polarization measurements do not allow a conclusive statement. The helicity amplitud...

Objectives: Auditory Brain Stem Response (ABR) is a result of eight nerve and brain stem nuclei stimulation. Several factors may affect the latencies, interpeak latencies and amplitudes in ABR especially sex and age. In this study, age and sex influence on ABR were studied. Methods: This study was performed on 120 cases (60 males and 60 females) at Akhavan rehabilitation center of university...