In a dynamic spectrum sharing system, a cognitive radio (CR) is provided with more channels than what it can use. So it is important for the CR to select the right channels for its transmission. To avoid interfering with incumbent primary radios, the existing schemes are based on channel sensing, which use the busy/idle status of a channel as the criterion to select channels. Such schemes in ge...

The Doppler bandwidth extracted from the standard deviation of the frequency shift in phase-resolved functional optical coherence tomography (F-OCT) was used to image the velocity component that is transverse to the optical probing beam. It was found that above a certain threshold level the Doppler bandwidth is a linear function of flow velocity and that the effective numerical aperture of the ...

We present an efficient implementation of the Modified SParse Approximate Inverse (MSPAI) preconditioner. MSPAI generalizes the class of preconditioners based on Frobenius norm minimizations, the class of modified preconditioners such as MILU, as well as interface probing techniques in domain decomposition: it adds probing constraints to the basic SPAI formulation, and one can thus optimize the...

Results from cognitive field studies using a method developed for knowledge elicitation in applied contexts are reviewed. A model for verbal probing procedures is presented. The model is used to assess situation awareness in dynamic decision making contexts – colleagues explore each other’s cognitive strategies. The objective is to promote a discussion on whether collegial collaboration based o...

Nanoindentation became a versatile tool for testing local mechanical properties beyond hardness and modulus. By adapting standard nanoindentation test methods, simple protocols capable of probing thermally activated deformation processes can be accomplished. Abrupt strain-rate changes within one indentation allow determining the strain-rate dependency of hardness at various indentation depths. ...

The emerging role of internal dynamics in protein fold and function requires new avenues of structure analysis. We analyzed the dynamically restrained conformational ensemble of ubiquitin generated from residual dipolar coupling data, in terms of protruding and buried atoms as well as interatomic distances, using four proximity-based algorithms, CX, DPX, PRIDE and PRIDE-NMR (http://hydra.icgeb....