The quantum version of the free fall problem is a topic often skipped in undergraduate mechanics courses, because its discussion usually requires wavepackets built on Airy functions—a difficult computation. Here, contrary, we show that can be nicely simplified both for single particle and general many-body systems by making use gauge transformation corresponds to change reference frame from lab...

In traditional approaches to knowledge representation, notions such as tolerance measures on data, distance between objects or individuals, and similarity measures between primitive and complex data structures are rarely considered. There is often a need to use tolerance and similarity measures in processes of data and knowledge abstraction because many complex systems which have knowledge repr...

Well. I'm well and truly settled into the job now. I've been here six months and things are developing nicely. I say nicely, but what I mean is rather quickly. I am now doing drug rounds unsupervised. I give IV drugs and am competent in phlebotomy.

Introduction and overview. Cognition influences affect – sometimes dramatically, as when a crafty political speech rises passions, and moves people to lofty or dangerous endeavors. However, many cognition-affect interactions are subtle. A fuzzy text or a noisy reception triggers annoyance. A harmonious chord or a symmetric design elicits pleasure. Recognizing a familiar face produces a sense of...

Various algorithms have been proposed for the diicult problem of producing aesthetically pleasing drawings of trees, see 14, 16] but implementations only exist as \special purpose software", designed for special environments. Therefore, many users resort to the drawing facilities available on most personal computers, but the gures obtained in this way still look \hand-drawn"; their quality is i...

like to add that she is a 2010-11 Commonwealth Fund Harkness fellow in healthcare policy and practice.

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The I-patch is a multi-sided surface representation, defined as combination of implicit ribbon and bounding surfaces, whose pairwise intersections determine the natural boundaries patch. Our goal to show how collection smoothly connected I-patches can be used approximate triangular meshes. We start from coarse, user-defined vertex graph which specifies an initial subdivision surface. Based on t...