Introduction Use of nonselective refocusing pulses shortens the echo spacing and the echo train duration, and then improves the image sharpness in SPACE [3, 4] imaging. However, the nonselective refocusing pulses limit the application of slab selective acquisition. To overcome this limitation, a dual echo-spacing technique [1] has been presented before, using a combination of selective excitati...

in a profoundly impressive verse in shahnameh, sky is likened to red ruby. the present paper is attempted to probe into the background of the conventional belief regarding the relationship between sky and stone, for the semantic structure of the verse is composed in such a way that it is not possible to consider this relationship as being a conceptualistic viewpoint so that one may establish so...

this study seeks to describe and discuss a hemistich, namely ‘‘yours the earth, mine the vulture’s feather’’, of the story of rostam and sohrab in ferdowsi's shahnameh. many commentators and interpreters of the shahnameh have different opinions on the concept and meaning of this hemistich. this has led the researchers to seek the reason of such differences, clues for the provided meanings,...

Embedding aweb-scale information network into a low-dimensional vector space facilitates tasks such as link prediction, classification, and visualization. Past research has addressed the problem of extracting such embeddings by adopting methods from words to graphs, without defining a clearly comprehensible graph-related objective. Yet, as we show, the objectives used in past works implicitly u...

INTRODUCTION Numerical optimization-based RF pulse design methods are widely used to incorporate system non-idealities and non-linearities such as field inhomogeneities, coil sensitivities, and signal decay [1-3]. These approaches often lead to RF pulses with high peak RF magnitude exceeding the hardware or safety limits and the variablerate selective excitation (VERSE) principle can be utilize...