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We present some issues that arise when a geometric transformation is performed on an image or a volume. In particular, we illustrate the well-known problems of blocking, blurring, aliasing and ringing. Although the solution to these problems is trivial in ...
The best method for investigating moiré phenomena in the superposition of periodic layers is based on the Fourier approach. However, superposition moiré effects are not limited to periodic layers, and they also occur between repetitive struct ...
We present an automatic sub-pixel registration algorithm that minimizes the mean square difference of intensities between a reference and a test data set, which can be either tri-dimensional (3-D) volumes or bi-dimensional (2-D) images. It uses spline proc ...
Deformation of Raman spectra of germanosilicate core fibers before and after UV irradiation were observed. It indicates the photoinduced transformation of glass structure. One of the possible models of such transformation is proposed. ...
In order to describe the different events occurring during the anionic polymerization of polyamide 12 (PA12), a general concept of a time, temperature, and transformation (TTT) diagram was established and related to reactive processing conditions. Polymeri ...
The concept of reaction invariants is extended to include flow invariants of chemical-reaction systems with inlet and outlet streams. A transformation to normal form is introduced that allows the separation of (1) the evolution of the independent reactions ...
Starting with a formal problem specification, we show how to progressively achieve a parallel distributed solution, using convenient transformations of specifications. In order to achieve a solution, we use rewriting techniques applied in the context of tr ...
Vertebrate Hox genes are essential for the proper organization of the body plan during development. Inactivation of these genes usually leads to important alterations, or transformations, in the identities of the affected developing structures. Hox genes a ...
The synthesis of (-)-depentylperhydrohistrionicotoxin (I, R = H) from the 2-cyano-6-oxazolopiperidine synthon (-)-II was achieved. The spiro skeleton was formed by an aldol cyclization of a Me ketone and an aldehyde function belonging to chains borne at C- ...
We present the results of a series of experiments on calcite I at around 45 GPa and temperatures between 300 and 2000 K, in a YAG-laser-heated diamond-anvil cell. Quenched samples have been examined by transmission electron microscopy. In the unheated part ...
