Integrals for the product of unitary-matrix elements over the U (n) group will be discussed. A group-theoretical formula is available to convert them into a multiple sum, but unfortunately the sums are often tedious to compute. In this paper, we develop an alternative method in which these sums are avoided, and group theory is rendered unnecessary. Only unitarity and the invariance of the Haar ...

Managing external relationships with a wide variety of suppliers and partners has become critical to an IS organization’s effectiveness in recent years. The theoretical literature in this area has looked extensively at sourcing relationships and suggests that there are a variety of different types of relationships currently in use. However, while it explains a great deal about how and when to o...

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The waveguide invariant is typically defined using of normal modes or ray theory, but it can also be related to the wavenumber-integration method for calculating the acoustic field in a waveguide. In this letter, the Wiener-Khinchin Theorem is used to show that the autocorrelation of the wavenumber-integration kernel, when plotted versus wavenumber difference and frequency, contains striations ...

Extensive challenges are often encountered when recruiting participants to chronic exercise (training) studies. High participant burden during chronic exercise training programmes can result in low uptake to and/or poor compliance with the study. The aim of this qualitative study was to identify factors affecting adolescent girls’ recruitment and adherence to chronic exercise training research ...

In spite of many years of effort, we are still not able to articulate and deliver IT value accurately. Unfortunately, “silver bullet thinking” still predominates (i.e., plug in technology and deliver bottom line impact) in organizations today. IT value is a multi-layered concept, far more complex than it first appears. To examine this complex concept and how it is understood in IT organizations...

We construct the Killing spinors for a class of supersymmetric solutions of type IIB supergravity that are invariant under the non-relativistic Schrödinger algebra. The solutions depend on a five-dimensional SasakiEinstein space and it has been shown that they admit two Killing spinors. Here we will show that, for generic Sasaki-Einstein space, there are special subclasses of solutions which ad...