Recent experiments showed the possibility of creating long-lived, nonlinear kinetic structures in a pure-electron plasma. These structures, responsible for large-amplitude periodic density fluctuations, were induced by driving the plasma with a weak oscillating drive, whose frequency was adiabatically decreased in time fW. Bertsche, J. Fajans, and L. Friedland, Phys. Rev. Lett. 91, 265003 s2003...

OBJECTIVES Interrelationships between Rett syndrome scoliosis and symmetric and asymmetric motor pull, ambulation, and advancement of age were investigated in order to provide a treatment rationale for slowing the progression of scoliosis. METHOD Questionnaires (N = 262) completed by International Rett Syndrome Association families were analyzed with logistic regression, odds ratio, Kruskal-W...

In a multi-group experimental design where interest is in a univariate response, the nonparametric Kruskal-Wallis test [Kniskal and Wallis (1952)] provides a potentially more powerful alternative to the parametric one-way analysis of variance when the assumptions of normality are in question. For multivariate response, Puri and Sen (1966) proposed a generalization of the KmskalWallis test that ...

OBJECTIVE To determine the effect of delayed light polymerization of a dual-cured composite base material on the marginal adaptation of class II composite restoration. MATERIALS AND METHODS 35 extracted human molar teeth were used to prepare class II mesio-occlusal or disto-occlusal slot preparations with gingival margins at the CEJ. The teeth were restored using an open-sandwich technique wi...

Kruskal's theorem on trees is a classical result of combinatorics with important applications in computer science. The minimal bad sequence argument Nash-Williams yields proof that very elegant but not as elementary possible, by previous results from mathematical logic. In the present paper, we formulate uniform Kruskal theorem, which extends original to general recursive data types. Our main s...

We explore criteria that data must meet in order for the Kruskal-Wallis test to reject the null hypothesis by computing the number of unique ranked 1 data sets in the balanced case where each of the m alternatives has n observations. We show that the Kruskal-Wallis test tends to be conservative in rejecting the null hypothesis, and we offer a correction that improves its performance. We then co...

Kruskal’s extension solves the problem of the arrow of time of the “Schwarzschild solution” through combining two Hilbert manifolds by a singular coordinate transformation. We discuss the implications for the singularity problem and the definition of the mass point. The analogy set by Rindler between the Kruskal metric and the Minkowski spacetime is investigated anew. The question is answered, ...