HypTrails is a bayesian approach for comparing different hypotheses about human trails on the web. While a standard implementation exists, it exposes performance issues when working with large-scale data. In this paper, we propose a distributed implementation of HypTrails based on Apache Spark taking advantage of several structural properties inherent to HypTrails. The performance improves subs...

When players in online games engage in conversation with each other, often through a chat window, their graphical avatars typically do not exhibit interesting behavior. This paper proposes using a model of face-to-face communication to automatically generate realistic nonverbal behavior in the avatars based on what is going on in the conversation. It describes Spark, a flexible XML based archit...

We study the Harvey-Lawson spark characters of level p on complex manifolds. Presenting Deligne cohomology classes by sparks of level p, we give an explicit analytic product formula for Deligne cohomology. We also define refined Chern classes in Deligne cohomology for holomorphic vector bundles over complex manifolds. Applications to algebraic cycles are given. A Bott-type vanishing theorem in ...

When troubleshooting buggy executions of distributed systems, developers typically start by manually separating out events that are responsible for triggering the bug (signal) from those that are extraneous (noise). We present DEMi, a tool for automatically performing this minimization. We apply DEMi to buggy executions of two very different distributed systems, Raft and Spark, and find that it...

3. 17th European Society for Biomaterials Conference, Barcelona 2002 ”Protein adsorption on spark anodized Titanium” P. Becker, A. Baumann, U. Beck, A. Kirbs, J. Rychly, F. Lüthen, H-G. Neumann 4. Ti 2003, Science and Technology, Vol. V, Proceedings of the 10th World Conference on Titanium, Hamburg 2003; (ed. G. Lütjering, J. Albrecht), 3339-3344 "Spark Anodization on Titanium and Titanium Allo...

L-type, voltage-dependent calcium (Ca(2+)) channels, ryanodine-sensitive Ca(2+) release (RyR) channels, and large-conductance Ca(2+)-activated potassium (K(Ca)) channels comprise a functional unit that regulates smooth muscle contractility. Here, we investigated whether genetic ablation of caveolin-1 (cav-1), a caveolae protein, alters Ca(2+) spark to K(Ca) channel coupling and Ca(2+) spark reg...