High sensitivity phonon spectroscopy of Bose-Einstein condensates using matter-wave interference

We study low momentum excitations of a Bose-Einstein condensate using a novel matter-wave interference technique. In time-of-flight expansion images we observe strong matter-wave fringe patterns. The fringe contrast is a sensitive spectroscopic probe of in-trap phonons and is explained by use of a Bogoliubov excitation projection method applied to the rescaled order parameter of the expanding condensate. Gross-Pitaevskii simulations agree with the experimental data and confirm the validity of the theoretical interpretation. We show that the high sensitivity of this detection scheme gives access to the quantized quasiparticle regime.Comment: 5 pages, 5 figures, author list update

Henry Ford Hospital: Options and Opportunities in the 1980s

This presentation by Mr. Peters and Dr. Steinhauer was given before the Henry Ford Hospital Professional Staff at a semi-annual dinner and staff meeting held on Tuesday, May 6, 1980. It offers a timely assessment of the position and prospects of the Hospital as we enter the new decade. On occasion, the journal features nontechnical articles like this presentation that we believe are of general interest to our readers

Exploring The Responsibilities Of Single-Inhabitant Smart Homes With Use Cases

DOI: 10.3233/AIS-2010-0076This paper makes a number of contributions to the field of requirements analysis for Smart Homes. It introduces Use Cases as a tool for exploring the responsibilities of Smart Homes and it proposes a modification of the conventional Use Case structure to suit the particular requirements of Smart Homes. It presents a taxonomy of Smart-Home-related Use Cases with seven categories. It draws on those Use Cases as raw material for developing questions and conclusions about the design of Smart Homes for single elderly inhabitants, and it introduces the SHMUC repository, a web-based repository of Use Cases related to Smart Homes that anyone can exploit and to which anyone may contribute

Echo spectroscopy of bulk Bogoliubov excitations in trapped Bose-Einstein condensates

We propose and demonstrate an echo method to reduce the inhomogeneous linewidth of Bogoliubov excitations, in a harmonically-trapped Bose-Einstein condensate. Our proposal includes the transfer of excitations with momentum +q to -q using a double two photon Bragg process, in which a substantial reduction of the inhomogeneous broadening is calculated. Furthermore, we predict an enhancement in the method's efficiency for low momentum due to many-body effects. The echo can also be implemented by using a four photon process, as is demonstrated experimentally.Comment: 4 pages, 5 figure

Katholischer Traditionalismus im Ruhrgebiet: ein Phänomen der Nachkonzilszeit

Das Phänomen des nachkonziliaren Traditionalismus wird beschrieben. Zugleich werden die Aktivitäten der einzelnen Gruppen im Ruhrgebiet im Überblick dargestellt

Die liturgische Verwendung des Dies Irae im Stundengebet: eine kritische Ergänzung zu Wagner, CistC 1998, S. 421 bis 429

Es geht um die Verwendung des Dies Irae in der erneuerten Stundeliturgie. Dabei wird besonders auf die Unterschiede zwischen der authentischen lateinischen Ausgaben der Liturgia Horarum und der deutschen Ausgaben des Stundenbuches hingewiesen