An amplitude modulated carrier frequency source has a first modulator and a first differential amplifier in a feedback loop of the first modulator, and a second modulator and a second differential amplifier in a feedback loop of the second modulator. A high level carrier frequency is applied to the second modulator and a further input of the second differential amplifier is derived from the modulating frequency. Another carrier frequency is applied to the first modulator whose associated differe...

Non-single crystal semiconductor material formed on a semiconductor substrate and separated from all but a portion of the substrate by an intervening insulation layer contains at least one dopant and preferably two dopants of opposite conductivity type. Heating the substrate, together with the overlying insulation and non-single crystal semiconductor layers, drives the dopants contained in the non-single crystal semiconductor material into the underlying semiconductor substrate in such a manner ...

Disclosed is a method for covering a source emitting ultraviolet radiation which method comprises covering said source with an acrylic glass colored with a coloring agent which absorbs in the visible region of the spectrum between 400 nanometers and 550 nanometers and exhibits an absorption of at least 2 percent for any wavelength within this region, and which agent concurrently has an average degree of transmission in the A- and B-region of the ultraviolet spectrum which is not below 55 percent...

There is disclosed in the present application an emergency chemiluminescent light source including a container masked to reflect the emitted light toward an illuminated object and away from the viewer. The container, which is preferably of a two part plastic construction, includes a relatively flat base surface upon which an adhesive ring is provided for attaching the light source to the object to be illuminated.

A source for producing a spray of drops and ions of a liquid material under the action of an electric field, comprises an emitting point in the shape of a cone with a rounded tip, the vertex angle of which is between thirty and forty degrees and which projects beyond a base structure by a distance of between some one and three millimeters, means for supplying a liquid material to be sprayed to the emitting point and a field generating electrode whereby there may be applied to the emitting point ...

Disclosed is a method and apparatus for enhancing the brightness of both continuous and pulsed positron beams. By subjecting positrons to non-conservative forces in an interaction region, typically by means of a positron moderator such as a single crystal Cu(111)+S moderator, it is possible to circumvent the limitation, expressed in Liouville's theorem, of the optimally achievable brightness of a beam. The inventive method can be applied in successive stages involving accelerating and focusing a...

Electrolytes for power sources, particularly alkaline and acidic power sources, comprising benzene polysulfonic acids and benzene polyphosphonic acids or salts of such acids.

A radioactive source is mounted at one end of a rod and a ball-shaped coupler is disposed at the other end of the rod. An apparatus for handling a plurality of radioactive sources respectively mounted at one end of a plurality of rods having a ball-shaped coupler disposed at the other end of each said rod includes a shaft having a canister at one end of the shaft and a clip at another position on the shaft. The canister defines a plurality of compartments for respectively receiving a plurality o...

A sound generator that has a plurality of acoustic piezoelectric transducers coupled to a single Helmholtz resonator. The resonant frequency of the Helmholtz resonator and each transducer can be intentionally chosen to be different so as to be stagger tuned so that the sound generator can create intense sound waves over a broad frequency range.

An improved approximation of the desired codebook boundary is achieved, when quantizing data from a source with memory, by adding a dither sequence, the samples of which are contained within the Voronoi region of an unpartitioned lattice or the first level of lattice partitioning used to generate the trellis code. A sequence of data generated by the source with memory is quantized to a nearest sequence of a predetermined trellis code which is based on coset partitioning of a predetermined lattic...