introduction echo-planar imaging (epi) is a group of fast data acquisition methods commonly used in fmri studies. it acquires multiple image lines in k-space after a single excitation, which leads to a very short scan time. a well-known problem with epi is that it is more sensitive to distortions due to the used encoding scheme. source of distortion is inhomogeneity in the static b0 field that ...

in this paper a new method for nondestructive testing or nondestructive evaluation is proposed for glass-epoxy composite. for this purpose, impact-echo is used to evaluate the properties of composite materials, detecting internal defects and thickness measurement. in the impact-echo method a steel ball impacts on a composite plate and generates stress waves or p-waves which will be transferred ...

one of the most common signals used for achieving high range resolution in radar is stepped-frequency signals. when a target is stationary in these radars, dft (discrete fourier transform) based processing is used to attain high range resolution profile (hrrp). however, in the case of moving target, due to spreading of the echo signal spectrum, dft based processing is not optimal and decreases ...

We review some accelerator physics topics for circular as well as linear colliders, considering both lepton and hadron beams. Invited Contribution to Review of Accelerator Science & Technology, Vol. 7 (2014), Editors Alexander W. Chao and Weiren Chou, World Scientific Pub., Singapore The research leading to these results has received partial funding from the European Commission under the FP7 Re...

This paper is a design report on a prototype musical controller based on fiberoptic sensing pads from Tactex Controls [8]. It will discuss elements of form factor, technical design, and tuning/sound generation systems tested while building the device I have dubbed ‘the Ski’. The goal is the creation of a fine musical instrument with which a skilled performer can play music from standard reperto...

Previous work has shown that the posteriorising agent retinoic acid can accelerate anterior neuronal differentiation in Xenopus laevis embryos (Papalopulu, N. and Kintner, C. (1996) Development 122, 3409-3418). To elucidate the role of retinoic acid in the primary neurogenesis cascade, we investigated whether retinoic acid treatment of whole embryos could change the spatial expression of a set ...