Searching for alternative methods for a sustainable population management of the common vole (Microtus arvalis)

Eggert, J., Wolff, C., Richter, K

Introduction to the Issue on Organizational Partnerships

Issue editors Russell Wolff, M.S. and Rebecca Pfeffer, Ph.D. introduce volume 16, Issue 2: Organizational Partnerships: How Collaboration Strengthens Families and Communities

Towards Social Information Seeking and Interaction on the Web

User generated content is one of the key concepts of the social web (a. k. a “Web 2.0”) and enables users to search and interact with information that has been created (e.g. blogs) or annotated by other users (e.g. in tagging systems). Consequently, information seeking and interaction have been extended by a social dimension. The interaction can be social in so far that user generated content is searched and retrieved or, in a more direct manner that social interactions are carried out before, during or after search by communicating through Web 2.0 features like (micro-)blog posts, comments, and ratings. This paper focuses on social interactions during the search process by combining a model introduced by Shneiderman (2002) which attempts to describe human motivation for collaboratively using computers with an explorative model for social search by Evans and Chi (2008)

Performance of a worm algorithm in ϕ4\phi^4 theory at finite quartic coupling

Worm algorithms have been very successful with the simulation of sigma models with fixed length spins which result from scalar field theories in the limit of infinite quartic coupling lambda. Here we investigate closer their algorithmic efficiency at finite and even vanishing lambda for the one component model in dimensions D = 2, 3, 4.Comment: 10 pages, 2 Fig

Quasilinear elliptic equations with sub-natural growth and nonlinar potentials

Necessary and sufficient conditions for the existence of finite energy and weak solutions are given. Sharp global pointwise estimates of solutions are obtained as well. We also discuss the uniqueness and regularity properties of solutions. As a consequence, characterization of solvability of the equations with singular natural growth in the gradient terms is deduced. Our main tools are Wolff potential estimates, dyadic models, and related integral inequalities. Special nonlinear potentials of Wolff type ssociated with "sublinear" problems are constructed to obtain sharp bounds of solutions. We also treat equations with the fractional Laplacians. Our approach is applicable to more general quasilinear A-Laplace operators as well as the fully nonlinear k-Hessian operators

A Swendsen-Wang update algorithm for the Symanzik improved sigma model

We study a generalization of Swendsen-Wang algorithm suited for Potts models with next-next-neighborhood interactions. Using the embedding technique proposed by Wolff we test it on the Symanzik improved bidimensional non-linear $\sigma$ model. For some long range observables we find a little slowing down exponent ($z \simeq 0.3$) that we interpret as an effect of the partial frustration of the induced spin model.Comment: Self extracting archive fil

Deaccessioning: Legal Parameters

The longstanding debate about “deaccessioning” concerns not so much whether a museum may deaccession works of art in its collection as under what circumstances it may do so. Linden Haveymeyer Wise and Beverly M. Wolff, Deaccessioning, Disposition, and the Pledge of Museum Collections: The Legal Parameters (1991)