We propose an elastic scalar imaging condition that corrects for the polarity change; however, this imaging condition requires additional prior information which may not be known accurately, or may suffer from interference of waves propagating from opposite sides of a reflector. Using incorrect Pand S-mode velocities causes reflectors in migrated PP, PS, and SP images to be shifted from their t...

Kennedy and Bai (2000 Perception 29 399-408) argued incorrect border polarity blocked perception of faces in shape-from-shadow 'Mooney faces' with dark lines at the contour, a display inspired by Hering. Their hypothesis was tested with several displays, notably binocular gratings made of lines of dots. The stereo-induced depth involved a shadow falling on two surface planes. Most of a dark-dot...

in this study the effect of input parameters of the edm process (pulse on-time, duty cycle and tool polarity), on the material removal rate (mrr), tool wear ratio (twr) and maximum surface roughness (rmax) in the machining aisi h13 tool steel has been studied. this study shows that increasing the duty cycle in the two conditions of tool polarity, material removal rate and the maximum surface ro...

Woller A and Gonze D (2013) The bird circadian clock: insights from a computational model. J Biol Rhythms 28(6):390-402. (Original DOI: 10.1177/0748730413512454).

Space charge accumulates near electrodes in insulating materials under high voltage direct current. Electric stress created by accumulation distorts electric field, reduces the remaining useful life of materials, and decreases partial discharge inception that are critical for ensuring dielectric integrity power applications. In this article, a novel approach mitigates space using electrets is p...

Natural indicators of the electrical polarity of a direct current (DC) source is limited to semiconductor based diodes and transistors. Recently a novel bio-natural indicator of the polarity of a DC source have been reported. Mimosa Pudica or sensitive plant is found to be a natural detector of a DC source polarity, however the mechanism underlying this phenomenon is not known. This paper aims ...

the present research aims to analyze the orthographic errors of german-speaking learners of persian at the elementary level. to do so, pieces of writing of 34 students were gathered via self-motivated method and examined based on the corpus of orthographic errors, using the frameworks proposed by keshavarz (1994) and ziahoseini (1999). 850 phonological, morphological, and orthographical errors ...