Let E be an elliptic curve over Q with complex multiplication by the ring of integers of an imaginary quadratic eld. Let be the Hecke character associated to E by the theory of complex multiplication. Let be the complex conjugate character of. For a pair of integers k and j, deene the Hecke character ' = '(k; j) = k j. Let p be a prime where E has good, ordinary reduction. Let p be a xed prime ...

Short wavelength FELS using the SLAC linac H. Winick a,*, K. Bane a, R. Boyce a, J. Cobb a, G. Loew a, P. Morton a, H.-D. Ntihn a, J. Paterson a, P. Pianetta a, T. Raubenheimer a, J. Seeman a, R. Tatchyn a, V. Vylet a, C. Pellegrini J. Rosenzweig b, G. Travish b, D. Prosnitz c, E.T . Scharlemann °, K. Halbach d , KA. Kim d, R. Schlueter d, M. Xie d, R. Bonifacio e, L. De Salvo e, P. Pierini e '...

We introduce a problem calledMaximum Common Characters in Blocks (MCCB), which arises in applications of approximate string comparison, particularly in the unification of possibly erroneous textual data coming from different sources. We show that this problem is NP-complete, but can nevertheless be solved satisfactorily using integer linear programming for instances of practical interest. Two i...

The tight tolerances in the main linacs of the Next Linear Collider (NLC) result in a large sensitivity of the beam emittance to slow alignment drifts. Once the accelerator is tuned, the optimized emittances must be maintained. Slow alignment drifts will make resteering and reoptimization necessary. The frequency of these linac reoptimizations is an important parameter that determines how well ...

we say that a finite group $g$ is conjugacy expansive if for anynormal subset $s$ and any conjugacy class $c$ of $g$ the normalset $sc$ consists of at least as many conjugacy classes of $g$ as$s$ does. halasi, mar'oti, sidki, bezerra have shown that a groupis conjugacy expansive if and only if it is a direct product ofconjugacy expansive simple or abelian groups.by considering a character analo...

The main linacs of the next generation of linear colliders need to accelerate the particle beams to energies of up to 750 GeV while maintaining very small emittances. This paper describes the main mechanisms of static emittance growth in the main linacs of the Next Linear Collider (NLC). We present detailed simulations of the trajectory and emittance control algorithms that are foreseen for the...

We develop an estimator for the parameters of a utility function that has interactions between the unobserved demand error and observed factors including price. We show that the Berry (1994)/Berry, Levinsohn, and Pakes (1995) inversion and contraction can still be used to recover the mean utility term that now contains both the demand error and the interactions with the error. However, the inst...

This paper describes GIB, the first bridge-playing program to approach the level of a human expert. (GIB finished twelfth in a hand-picked field of thirty-four experts at an invita-tional event at the 1998 World Bridge Championships .) We give a basic overview of the algorithms used, describe their strengths and weaknesses, and present the results of experiments comparing GIB to both human oppo...

In microscopy, shot noise dominates image formation, which can be modeled as a Poisson process. The Richardson-Lucy method tends to converge slowly for large problems and is not flexible to the addition of nondifferentiable priors. In this project, proximal algorithms like ADMM and Chambolle-Pock are applied to three dimensional deconvolution and are shown to converge faster than Richardson-Lucy.

In systematics, we usually estimate ancestral phenotypes of morphological and molecular characters measured as categorical or " state " variables. Ancestral estimation has also been important in the studies of animal behavior, physiology, ecology, and other areas of biology, where the characters are usually measured as continuous rather than categorical variables. In the past, the most common w...