The Shrinking Generator, presented at Crypto'93, is a LFSR-based pseudorandom generator suitable for the implementation of additive stream ciphers. It is particularly simple and has attractive security properties. (The reader is referred to [1] for the definition of the generator and its properties). Although the algorithm was originally intended for hardware implementation, here we will focus ...

The wreckfish individual transferable quota (ITQ) program started in 1992 and is the oldest finfish ITQ program in the United States. Initially, the program appeared to be a success, bringing order to the previous years’ derbies. Ex-vessel prices rose, harvest stabilized, and there was an orderly shrinking of the fleet to an economically appropriate size. The subsequent history of the fishery i...

The microbiological leaching of a sulfide ore sample was investigated in shake flask experiments. The ore sample contained pyrite, pyrrhotite, pentlandite, sphalerite, and chalcopyrite as the main sulfide minerals. The tests were performed at eight different temperatures in the range of 4 to 37 degrees C. The primary data were used for rate constant calculations, based on kinetic equations unde...

We show that a four-dimensional complete gradient shrinking Ricci soliton with positive isotropic curvature is either a quotient of S4 or a quotient of S3 × R. This gives a clean classification result removing the earlier additional assumptions in [14] by Wallach and the second author. The proof also gives a classification result on gradient shrinking Ricci solitons with nonnegative isotropic c...

The main purpose of this article is to provide an alternate proof to a result of Perelman on gradient shrinking solitons. In dimension three we also generalize the result by removing the κ-non-collapsing assumption. In high dimension this new method allows us to prove a classification result on gradient shrinking solitons with vanishing Weyl curvature tensor, which includes the rotationally sym...