Abstract: A resonant driving circuit for a laser diode comprises an impulse generator for generating narrow output pulses, a delay line for generating a composite output of reflections of the output pulses from terminations of the transmission line, a laser diode for generating an optical output from the composite output, and a forward bias network to bias the laser diode.

Abstract: An opto-electronically controlled waveguide includes a waveguide; a finline mounted in the waveguide; a photovoltaic switch operably electrically cected to the finline; and a light source for generating an optical signal for modulating the photovoltaic switch. Modulation of the photovoltaic switch by intensity modulating the optical signal allows modulation of the insertion loss of the waveguide without the need for a DC bias.

Abstract: A method for estimating the cell loss rate of an asynchronous transfer mode statistical multiplexer comprises the steps of finding a multiplexer state probability distribution and estimating the cell loss rate from the multiplexer state probability distribution.

Abstract: A single crystal silicon film nanostructure capable of optical emission is laterally disposed on an insulating transparent substrate of sapphire. By laterally disposing the nanostructure, adequate support for the structure is provided, and the option of fabricating efficient electrical contact structures to the nanostructure is made possible. The method of the invention begins with the deposition of ultrathin layers of silicon on the substrate. A Solid Phase Epitaxy improvement process is then used to remove crystalline defects formed during the deposition. The silicon is then annealed and thinned using thermal oxidation steps to reduce its thickness to be on the order of five nanometers in height. The width and length of the nanostructure are defined by lithography. The nanometer dimensioned silicon is then spin-coated with a resist with width and length definition in the resist being performed by way of electron beam exposure.

Abstract: A method for fabricating silicon-germanium alloy on a sapphire substrate of the present invention comprises the steps of passivating a surface of a sapphire substrate, maintaining a deposition temperature of about 900 degrees C., exposing the passivated surface to a flow of about 1 slm of about 2 percent silane in a hydrogen carrier and a flow of at least 200 sccm of about 10 percent germane in a hydrogen carrier to form a layer of single crystal silicon germanium alloy on the passivated surface of the sapphire substrate, and ramping the temperature down to about 650 degrees C. during the step of exposing the passivated surface to the germane gas.

Abstract: A method for transforming world coordinates into device coordinates comprises the steps of inputting a set of world coordinates to be displayed, scaling the world coordinates into view coordinates bounded by a display volume, finding a control memory location of a light beam deflector corresponding to a Y-axis position for each of the view coordinates, calculating X-axis and Z-axis device coordinates from the view coordinates for deflecting a light beam to a selected point within the display volume corresponding to each of the view coordinates, and loading the device coordinates into the control memory locations corresponding to the Y-axis position for each of the view coordinates to cause the light beam to be deflected to each selected point.

Abstract: A light emitting photonic structure has a transparent substrate, such as sapphire, supporting a layer of group IV semiconductor material, such as silicon, having at least one porous region from which light is emitted as a response to a stimulus. An example of such a photonic structure is described in U.S. patent application Ser. No. 08/118,900. The photonic structure can be used to assess the presence of various fluids. The photonic structure is disposed to be contacted by the fluid to be sensed should it be present. The light emitting region of the photonic structure is stimulated by an appropriate source, and the light emitted by the photonic source is detected by a detector. The light emitting region of the photonic structure will emit a certain luminescence in air and should the light emitting region be contacted by other fluid or fluids, this luminescence can be affected and the corresponding change in luminescence can be detected thus the presence of these fluids can be sensed.

Abstract: The Beamformer with Adaptive Processors is a practical joint spatial-templ processor suitable for combining multiple antenna signals for a communications receiver. The invention identifies a beam or beams, amongst a discreet set of fixed beams, for which adaptive locally optimum processing will most likely reveal the presence of a weak signal. The invention chooses a suitable form of adaptive locally optimum processing according to the nature of the beam or beams identified. The beam or beams are selected for adaptive locally optimum processing depending on several simple characteristics of a Fast Fourier Transform (FFT) of each beam's output. These are .SIGMA..sigma..sup.2, D, and B (the sum of the squares of the Fourier coefficients, the number of distinct peaks amongst these coefficients, and the total number of coefficients defining the peaks, respectively).

Abstract: An electrochemical cell comprises a container; an electrolyte held within e container, a first electrode positioned in the electrolyte; and a second electrode having a beryllium compound coating. The second electrode is positioned in the electrolyte and generally centered within the first electrode. The second electrode is made of a material selected from the group that includes palladium, AB.sub.2 alloys, and AB.sub.5 alloys, where A represents magnesium, zirconium, and lanthanum, and B represents vanadium, chromium, manganese, or nickel. The beryllium compound coating is formed by charging the second electrode in the presence of a beryllium salt.

Abstract: A spectroscopic detector suitable for detecting oil spills in an aquatic environment includes a buoyant container having an optical window; an optical energy generator mounted in the container for directing an optical energy beam through the window; an optical detector for generating an output signal in response to detecting a second optical energy beam received in the container through the window; and a beam splitter for directing the second optical energy beam to the optical detector. The generation of the optical energy beam and operation of the optical detector may be time gated to reduce thermal noise and isolate the sampled optical energy from background light. The optical energy beam preferably has UV components which inhibits the formation of biological organisms on the optical window.

Abstract: A solid state 3-D display comprises an array of voxels made of an electroinescent material arranged in a matrix of a transparent material. Transparent electrodes are formed in the matrix to form electrical connections to each voxel. The transparent electrodes are connected to voltage sources outside the display volume for controlling the optical output of each voxel to produce a three-dimensional image inside the display volume.

Abstract: A biorepellent matrix structure comprises a resin and first and second micapsules suspended in the resin. The first and second microcapsules each includes a first shell and a second shell, respectively, containing a biorepellent material that is released upon penetration of any of the first and second shells, as for example, by a biological organism. The biorepellent material, such as capsaicin, diffuses through the first and second shells at different rates. The different diffusion rates of the biorepellent material together provide a biorepellant matrix structure that exhibits long term protection against the formation of biological organisms that would otherwise accumulate on the matrix structure, and deters organisms from gnawing or chewing the matrix structure.

Abstract: A quotient coding modem comprises a modulator that encodes transmitted symbols by the equation ##EQU1## and a demodulator that decodes received symbols by the equation ##EQU2## where q(t) and q.sub.r (t) are functions of time for transmitted and received symbols s(t) and s.sub.r (t) respectively at time t, P.sub.r (t)=.vertline.q.sub.r (t).vertline..sup.2 is instantaneous received baseband power at time t, .eta. is a function of the two smallest symbol amplitudes, and P.sub.max is peak transmitted power.

Abstract: The braked linear nipper of the present invention comprises a belt roller, belt, and a belt load for applying a squeeze load along a length of a linear material being pulled along the belt by an object onto which the linear material is being wound. The linear material imparts motion to the belt via friction coupled by the squeeze load. A brake coupled to the belt induces a tension in the linear material.

Abstract: The optoelectronic switch of the present invention comprises two PIN diodes onnected in series with opposed polarity having their intrinsic regions coupled to a light source for maintaining both diodes in the conductive state while the light source is on and in the non-conductive state while the light source is off.

Abstract: A frequency selective surface integrated antenna is provided which compri a frequency selective surface, including an electrically non-conductive substrate and an electrically conductive layer, mounted to the substrate and having a pattern of apertures; and an antenna integrated in the frequency selective surface.

Abstract: The frequency domain kernel processor of the present invention comprises a cheduler for selecting samples from blocks of Fourier transform coefficients in a predetermined sequence and for outputting the selected samples as serial terms s and as parallel terms u. A transform processor is coupled to the scheduler to receive the terms s and u. The transform processor comprises transform calculators for calculating output values p and f as functions of terms s and u to model the interference and to reveal the desired signal, a first sum calculator for calculating a sum of p values, a second summing calculator for calculating a sum of f values, and a divider for calculating, the quotient of the sum of p values divided by the sum of f values. An output buffer stores the outputs of the divider for formatting as a spectral display.

Abstract: A hidden Markov detector of the present invention comprises a hidden Markov arameter estimator for coupling to an input data source, a parameter smoother coupled to the parameter estimator, and a detection statistic calculator coupled to the parameter smoother and the input data source.

Abstract: An impulsive snap-through acoustic pulse generator may be used to generate n acoustic pulse in an aqueous environment without gas bubbles. The impulsive snap-through acoustic pulse generator includes a support structure having an open end; a resilient shell mounted to the support structure to define a chamber, and a gas vent in fluid communication with the chamber through which a gas passes for changing the pressure in the chamber so that the resilient shell transitions from a first stable state to a second stable state, thereby generating an acoustic pulse.

Abstract: The invention provides a computer implemented system comprised of two computer terminals for effectuating bidirectional digital, time synchronized communications between networks operating asynchronously with respect to one another. The system repackages the data field of a message received from a network into a message that further includes time indicia corresponding to a time slot in which the repackaged message is to be transmitted so that it may be received by a second network. The repackaged message then is buffered until it is transmitted in the the appropriate time slot so that it may be detected by the second network. The invention overcomes the problem of effectuating communications between distant networks where the message propagation time and time slot period for receiving messages limits the range of communications.