The limit to which the phase change memory material Ge2Sb2Te5 can be scaled toward the smallest possible memory cell is investigated using structural and optical methodologies. The encapsulation material surrounding the Ge2Sb2Te5 has an increasingly dominant effect on the material’s ability to change phase, and a profound increase in the crystallization temperature is observed when the Ge2Sb2Te...

To learn the meanings of words, children must connect referents in the world around them with the sounds they hear. One proposed mechanism for this process is cross-situational word learning: tracking associations between words and objects across time. We consider the problem of anaphora for a crosssituational word learner: after an object has been introduced it is unlikely to be named in every...

• A simple source coder is shown in Fig. 3.1. Here, the sampled speech is passed through a quantizer. The quantizer can be represented by a number of break points which partition the input signal amplitude into disjoint regions. The regions are specified by an index. The index representing a region can be mapped into a quantized value x̂[n] which is used for all input all signal values that fall...

In this paper, a subband coding system which dynamically adapts to the local orientation of image features is investigated. In particular, the re-orientation scheme proposed in [1] is used in conjunction with a separable octave-band subband decomposition. This is then followed by e cient coding techniques such embedded zerotrees, trellis coded quantization, and stackrun coding. The coded images...

During development of new and experimental imaging techniques, one must compare with other well established methods to qualify the validity of the new methods. The use of diffusion tensor magnetic resonance imaging for the visualization of collateral nerve fibers in the spinal cord was recently proposed. To validate this new imaging method, the MR results need to be compared with histology tiss...