Cha, Choi, and Park Reply:

Park et al. Reply

Reply to Drs. Park & Shin's letter.

We appreciate the Letter to the Editor by Drs. Park and Shin regarding our recentmanuscript describing a case of reversible Henoch–Schönlein purpura (HSP) complicating adalimumab (ADA) therapy. We are thankful for their attention to our work and for the interesting arguments raised for our consideration. In the face of such uncertainty in the pathogenesis of HSP related to anti-TNFα therapy (pa...

Reply to the Comment by Park and Ho

Park and Ho [1] correctly point out an error in the surface term (9) of Ref. [2], and the consequent lack of antisymmetry in the Poisson brackets (13) of that paper. The root of the problem is that the surface term fails to make the action sufficiently " differentiable " : the diffeomorphisms of interest, given by eqns. (17)-(18) of Ref. [2], do not satisfy the boundary conditions (described af...

Cha-Cha: A System for Organizing Intranet Search Results

Although search over World Wide Web pages has recently received much academic and commercial attention, surprisingly little research has been done on how to search the web pages within large, diverse intranets. Intranets contain the information associated with the internal workings of an organization. A standard search engine retrieves web pages that fall within a widely diverse range of inform...

Doesthetransiti~nt~cha~~ Determinethedynamicaperture?*

We review the important notion of the dynamic aperture of a storage ring with emphasis on its relation to general ideas of dynamical instability, notably the transition to chaos. Practical approaches to the problem are compared. We suggest a somewhat novel quantitative guide to the old problem of choosing machine tunes based on a heuristic blend of KAM theory and resonance selection rules. INTR...