Jini technology assumes a changing network, in terms of both the components that make up the network and the way these components interact. Networks are generally long-lived entities that, as they grow to include ever-larger populations of users and machines, become increasingly difficult to upgrade as a single entity. That’s why the Jini architecture is designed around support for incrementall...

Foretelling these attacks, the President’s Commission on Critical Infrastructure Protection (PCCIP) announced in October of 1997 that the increasing dependence of U.S. critical infrastructures on information and communications has made them vulnerable to information warfare attacks. The commission found that while the resources needed to conduct a physical attack against these infrastructures h...

over Honduras northeast toward Cuba, this scientific visualization was created in 1999 using infrared and visible cloud data from the NOAA Geostationary Operational Environmental Satellites.

In defending network resources any number of technologies might be applied. Firewalls, encryption technology, authentication devices, vulnerability checking tools, and other products can all offer improved security. But even when a computer system is equipped with stringent authentication procedures and firewalls, it is still susceptible to hackers who take advantage of system flaws and social ...

Interpreting the past latitude and geography of the continents from palaeomagnetic data relies on the key assumption that Earth’s geomagnetic field behaves as a geocentric axial dipole. The axial dipolar field model implies that all geomagnetic reversals should be symmetric. However, palaeomagnetic data from volcanic rocks produced by the 1.1-billion-yearold Keweenawan Rift system in North Amer...

Paleomagnetic poles and magnetostratigraphy were obtained from the late Carnian and early Norian Petrified Forest Formation, The remanent magnetization characteristics of this variegated claystones formation are correlated closely with stratal color; red strata display univectorial magnetizations directed to the origin of orthogonal axes plots between 300' and 630°C whereas progressively great...