Tuesday, November 26, 2013

Peter Constantin: Wikipedia


Wechseln zu: Navigation, Suche
Peter Constantin (* 29. August 1951) ist ein rumänisch-US-amerikanischer Mathematiker, der sich mit partiellen Differentialgleichungen insbesondere in der Hydrodynamik beschäftigt.
Constantin studierte an der Universität Bukarest, wo er 1975 „summa cum laude“ sein Diplom ablegte. Er wanderte nach Israel aus, wo er 1981 bei Shmuel Agmon an der Hebrew University promovierte (Spectral Properties of Schrödinger Operators in Domains with Infinite Boundaries). 1985 wurde er Assistant Professor an der University of Chicago, wo er seit 1988 Professor ist, seit 2005 „Louis Block Professor“ und ab 2009 „Distinguished Service Professor“. Ab 2012 is er "William R. Kenan Jr. Professor" an der Princeton University[1]. Er war unter anderem Gastwissenschaftler am Max-Planck-Institut für Mathematik in Bonn, am Weizmann Institut, am Institute for Advanced Study, an der Universität Paris-Süd, an der Ecole Normale Superieure, am Mittag-Leffler-Institut, am IHES, am RIMS in Kyōto, am Institute Henri Poincaré in Paris, am MSRI, am Courant Institute of Mathematical Sciences of New York University, am Erwin-Schrödinger-Institut für Mathematische Physik in Wien und am Isaac Newton Institut in Cambridge.
Constantin beschäftigte sich unter anderem mit den partiellen Differentialgleichungen der Hydrodynamik, wie Eulergleichung, Navier-Stokes-Gleichung und mit Turbulenztheorie, zum Beispiel Dimension von Attraktoren der Chaostheorie, Intermittenz, kritischen Skalierungsexponenten in der Hydrodynamik, konvektiver Turbulenz, Fronten in reaktiven Medien wie Flammen, turbulenter Transport, Fragen der Existenz und Regularität der Lösungen, lokaler Glättung, Turbulenz-Gleichungen mit aktivem Skalar. Teilweise arbeitete er dabei mit den Mathematikern Roger Temam, Peter Lax, Ciprian Foias sowie den Chaostheoretikern und Physikern Leo Kadanoff, Itamar Procaccia zusammen. Constantin beschäftigte sich aber auch mit anderen Gleichungen der mathematischen Physik wie der Schrödingergleichung.
1986 bis 1990 war er Sloan Fellow. 1994 war er Invited Speaker auf dem Internationalen Mathematikerkongress in Zürich (Some mathematical problems of fluid mechanics). 1998 bis 2004 war er Herausgeber von „Nonlinearity“. Er ist Fellow der American Mathematical Society, der American Physical Society und der SIAM.
Zu seinen Doktoranden zählt Mary Pugh.


Saturday, November 16, 2013

McCormick News: Trajcevski Wins Best Short Paper Award at 2013 ACM MSWiM Conference


Goce Trajcevski received the Best Short Paper Award in the 16th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM 2013) on  November 3-8, 2013 in Barcelona, Spain. The winning paper, entitled "Voronoi Trees for Hierarchical In-Network Data and Space Abstractions in Wireless Sensor Networks," was also co-written by Mohamed Ali (UIC) and Ashfaq Khokhar (IIT). The work addresses the problem of efficient in-network processing of spatial queries in Wireless Sensor Networks. Specifically, it considers hybrid overlays settings, where the data values may correspond to different physical phenomena measured by distributed sensors, and may be additionally correlated via spatial constraints. Traditional indexing structures such as KD trees, R-Trees, B-Trees, or variations thereof ? along with various clustering and routing trees, have already been used for organizing in-network data aggregation in WSNs.

The awarded paper showed how using a proper "weighted" distance enables Voronoi-based partitions of the sensing field into convex cells. Subsequently, Voronoi Trees are built in a hierarchical manner, mapping both data and space abstractions, for energy-efficient processing of spatial queries. The evaluations demonstrated significant advantages of the Voronoi Trees based indexing structure in terms of accurate field representation at different levels of the tree hierarchy, with acceptable trade-offs in terms of query processing latency.

Over the years, MSWiM has established itself as a major research venue where numerous key results in the area of performance evaluation of wireless and mobile systems have appeared; we are delighted that this year’s event, maintains the tradition of high quality contributions. covering several specializations within mobile and wireless systems.

The 16th ACM MSWiM 2013 Conference featured Symposia and Workshops, specifically on emerging topics related to wireless networking and mobile computing. The four symposia were: MobiWAC, PE-WASUN, DIVANet and Q2SWinet and the three workshops: WMuNeP, PM2HW2N and HP-MOSys. Over the years, these seven events have become successful and quite competitive.