This article addresses a problem with copy-protecting a large collection of electronic content. The notion and severity of a generic attack are raised in the context of Adams and Zuccherato’s Privilege Management Infrastructure. A solution is then proposed that reduces a content distributor’s risk of piracy.

[1] The global ionospheric map (GIM) is used to observe variations in the total electron content (TEC) of the global positioning system (GPS) associated with 35 M 6.0 earthquakes that occurred in China during the 10-year period of 1 May 1998 to 30 April 2008. The statistical result indicates that the GPS TEC above the epicenter often pronouncedly decreases on day 3–5 before 17 M 6.3 earthquakes...

In this paper, we examine ionospheric plasma depletions (or bubbles) and irregularities observed by photometers and a ground-based receiver of the global positioning system (GPS) both located in Brazil, South America. A simultaneous observation reveals that when the ionospheric plasma becomes depleted, the GPS total electron content decreases and the associated phase fluctuations grow. Statisti...

[1] Using Global Positioning System (GPS) data from sites near the 16 Oct. 1999 Hector Mine, California earthquake, Pulinets et al. (2007) identified anomalous changes in the ionospheric total electron content (TEC) starting one week prior to the earthquake. Pulinets (2007) suggested that precursory phenomena of this type could be useful for predicting earthquakes. On the other hand, and in a s...

[1] We report seismo‐ionospheric precursors of anomalous decreases in the total electron content (TEC) appearing day 5 prior to an M9.3 earthquake, the largest one in the last five decades, which occurred in Sumatra‐Andaman, Indonesia on 26 December 2004. Sequences of global ionosphere maps of the TEC derived from worldwide ground‐based receivers of the global positioning system (GPS) are used ...

Physical demands such as distance covered and speed of individual players during football, handball, rugby league (13 players), and rugby union (15 players, hereinafter “rugby”) games were analyzed to create training plans suitable for each sport (Tanisho et al., 2009; Tanaka et al., 2002; Gabbett et al., 2012). In the 1980s, Kawase et al. (1988) conducted research on total distances covered pe...

[1] At 17:47 UT on 20 September 1999, a large earthquake of magnitude Mw 7.6 struck the central Taiwan near a small town of Chi‐Chi. The ground‐based receivers of the global positioning system (GPS) in the Taiwan area detected coseismic ionospheric disturbances (CIDs) in the total electron content (TEC) triggered by the Chi‐Chi earthquake. When the CIDs travel away from the origin on the Earth ...

The present invention provides a method and a device for providing superior differential GPS positioning data. The system includes a group of GPS receiving ground stations covering a wide area of the Earth’s surface. Unlike other differential GPS systems wherein the known position of each ground station is used to geometrically compute an ephemeris for each GPS satellite, the present system uti...

Master of Electrical Engineering Program Cornell University Design Project Report Project Title: Ionospheric irregularities as observed from the GPS reference station in Singapore, March 2002 Author: Pongabha Abhakara Abstract: In regions near the geomagnetic equator, the phenomenon of ionospheric irregularities that causes scintillations in Global Positioning System (GPS) signals occurs freque...