Abstract: Network demonstration techniques are disclosed which allow a fully-operational, secure wireless network to be implemented at a customer location. Using only a portable authentication server, a laptop computer, and at least two access points, a wireless network can be set up at the customer location within a matter of minutes, so that a user of a portable computing device having an appropriate network interface card is able to roam throughout the customer location with the benefit of a wireless connection to one of the access points. The laptop computer contains software integrating the functionality of a security server, a user authentication database, and other components necessary to implement the wireless network. The user may also be able to communicate with the laptop computer and authentication server from locations external to the customer location, perhaps using a wireless wide area network or secondary wireless local area network.

Abstract: Network demonstration techniques are disclosed which allow a fully-operational, secure wireless network to be implemented at a customer location. Using only a portable authentication server, a laptop computer, and at least two access points, a wireless network can be set up at the customer location within a matter of minutes, so that a user of a portable computing device having an appropriate network interface card is able to roam throughout the customer location with the benefit of a wireless connection to one of the access points. The laptop computer contains software integrating the functionality of a security server, a user authentication database, and other components necessary to implement the wireless network. The user may also be able to communicate with the laptop computer and authentication server from locations external to the customer location, perhaps using a wireless wide area network or secondary wireless local area network.

Abstract: An inspection apparatus which incorporates a digital electron detection device. In this apparatus, counting devices are used for the measurement of electrons emanating from an object after interaction with an incident radiation beam. Using these counters, detection is also possible even when the electron pulses have a small current content. By the addition of a DAC and possibly a sample-and-hold circuit, spectometric measurements are possible so that absolute potential values of a measuring point can be determined. For measurement of comparatively large currents, digital feedback can be used. Multi-sampling make possible much faster measurements.

Abstract: A device for producing or amplifying coherent radiation includes a semiconductor device such as a laser. By means of electrons of high energy produced by a semiconductor cathode of the device, population inversion is obtained in an active layer of the laser structure. In this manner, laser action is obtained, which offers advantages, especially with II-VI materials which emit radiation of a wavelength shorter than the usual III-V materials, and which do not permit the desired population inversion to be obtained in the same manner as in III-V materials, by means of current injection across a pn junction. The semiconductor cathode and the laser structure can be arranged in mutual separation in a vacuum tube or be realized in one semiconductor body. The short-wave laser is especially advantageous for CD,DOR and VLP applications.