The multi-armed bandit problem with switching penalties (switching cost and switching delays) is investigated. It is shown that under an optimal policy, decisions about the processor allocation need to be made only at stopping times that achieve an appropriate index, the well-known “Gittins index” or a “switching index” that is defined for switching cost and switching delays. An algorithm for t...

The 21st century is the age of Intemet and World Wide Web. The Web revolutionizes the way we gather, process, and use information. At the same time, it also redefines the meanings and processes of business, commerce, marketing, finance, publishing, education, research, development, as well as othq aspects of our daily life. The revolution is just beginning. Although individual Web-based informa...

This paper is a study of the use and possible flaws of the two basic cryptographic protocols (WEP, WPA) in Wi-Fi Networks. It is presenting some very easy to implement methods to gain malicious access to such networks by disclosing the network secret key, using Windows Operating Systems, like Win XP. It is also describing the shutter of the myth saying that the MAC Address filtering is a safe p...

The maximum segment density problem is this: Given a sequence of pairs (ai, wi), i = 1, 2, . . . , n, with wi > 0, and another pair of numbers L ≤ U , we have to find a subsequence ai, ai+1, . . . , aj whose density (ai + ai+1 + . . .+ aj)/(wi +wi+1 + . . .+wj) is maximum under the constraint that L ≤ wi + wi+1 + . . . + wj ≤ U . A principal motivation for studying this problem is its applicati...

Pascale Carayon*, Paul Smith, Ann Schoofs Hundt, Vipat Kuruchittham and Qian Li Center for Quality and Productivity Improvement, University of Wisconsin-Madison, Madison, WI, USA; Department of Industrial and Systems Engineering, University of Wisconsin-Madison, Madison, WI, USA; Department of Family Medicine, University of Wisconsin Medical School, WI, USA; University of Wisconsin Medical Foun...

Bradley S. Gundlach, Michel Frising, Alireza Shahsafi, Gregory Vershbow, Chenghao Wan, Jad Salman, Bas Rokers, Laurent Lessard, Mikhail A. Kats Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland Department of Art, University of Wisconsin-Madison, Madison, WI Department ...

This paper studies the use of wireless Ethernet (Wi-Fi) as a localization sensor for mobile robots. Wi-Fi-based localization relies on the existence of one or more Wi-Fi devices in the environment to act as beacons, and uses signal strength information from those beacons to localize the robot. Through the experiments described in this paper, we explore the general properties of Wi-Fi in indoor ...

J. H. Holmes, R. L. O'Halloran, T. A. Bley, C. J. Francois, M. L. Schiebler, R. F. Lemanske, R. L. Sorkness, and S. B. Fain Applied Science Laboratory, GE Healthcare, Madison, WI, United States, Department of Medical Physics, University of Wisconsin-Madison, Madison, WI, United States, Department of Radiology, University of Wisconsin-Madison, Madison, WI, United States, Department of Pediatric ...

BACKGROUND AND PURPOSE Withanolides are naturally occurring chemical compounds. They are secondary metabolites produced via oxidation of steroids and structurally consist of a steroid-backbone bound to a lactone or its derivatives. They are known to protect plants against herbivores and have medicinal value including anti-inflammation, anti-cancer, adaptogenic and anti-oxidant effects. Withafer...