Abstract: In a method for generating a transillumination signal of a section of the subsurface, an HPEM radiation source radiates an electromagnetic pulse into the section for the purpose of exciting electromagnetically reactive structures to emit an electromagnetic response signal. For the pulse, a pulse duration of at most 500 ns, a center frequency in the range between 10 MHz and 10 GHz, and a bandwidth in the range from 10% to 150% of the center frequency is set. The transillumination signal is formed as the sum of response signals received at a measuring location. In a method for detecting a cavity in the subsurface, the above method is carried out, and the structures are detected from the transillumination signal with the aid of a detection method, and the cavity is detected if the structures satisfy a detection criterion.

Abstract: A method for determining an amount of charge uses a capacitive structure which has an electrode device, a dielectric material with a voltage-dependent permittivity, and a counter-electrode device. The method has an adjusting step, an applying step, and a detecting step. In the adjusting step, an electric reference potential is adjusted between the electrode device and the counter-electrode device in order to adjust a reference capacity. In the applying step, an electrical potential resulting from the amount of charge is applied in addition to the reference potential in order to obtain a resulting capacity. In the detecting step, a capacity change is detected between the reference capacity and the resulting capacity in order to determine the amount of charge.

Abstract: This invention relates to a system for measuring electrical characteristics of a multiphase fluid flow in a pipe, the system comprising an essentially coaxial insert in said flow defining an annular space between a chosen part of said insert and the pipe wall. The system including resonance measuring means including at least one first antenna, the resonance measuring means being adapted to transmit an electromagnetic signal into said volume within a frequency range comprising at least one predetermined resonance in said volume, the resonance measuring means also being adapted to measure the resonance properties in said volume, said resonance having an amplitude minimum in at least one known position in said volume and said first antenna positioned outside said known position of amplitude minimum.

Abstract: Antenna systems are described which provide means of mitigating the undesirable transmission line effect(s) by using fractal metamaterials in close proximity to an antenna, with both the antenna and fractal metamaterials being positioned a conductive surface, which may be inside or adjacent to a cavity. The fractal metamaterial can include an array of close spaced (e.g., less than 1/10 wavelength separation) resonant structures of a fractal shape, resonant at or near the intended frequency of use of the antenna. The fractal metamaterial can reverse the phase of the reflected wave so that the metal cavity no longer produces an out of phase current induced by the antenna. Without the cavity being out of phase to the antenna, the transmission line effect is mitigated substantially and the antenna performance can accordingly be enhanced. Further embodiments omit a cavity and locate a fractal metamaterial and antenna(s) adjacent to an underlying conductive surface.

Abstract: A deformometer includes: a cavity body; entry and exit optical cavity optics, such that the optical cavity produces filtered combined light from combined light; a first laser that provides first light; a second laser that provides second light; an optical combiner that: receives the first light; receives the second light; combines the first light and the second light; produces combined light from the first light and the second light; and communicates the combined light to the entry optical cavity optic; a beam splitter that: receives the filtered combined light; splits the filtered combined light; a first light detector in optical communication with the beam splitter and that: receives the first filtered light from the beam splitter; and produces a first cavity signal from the first filtered light; and a second light detector that: receives the second filtered light; and produces a second cavity signal from the second filtered light.

Abstract: A head mounted display device including a processor configured to compute a rendered rendering surface of a predicted scene having a predicted user viewpoint, the predicted user viewpoint being a prediction of a viewpoint that a user will have at a point in time that was predicted for the user of the head mounted display device prior to the point in time, receive, from the user input device, a subsequent user navigation input near the point in time in the stream of user input, determine an actual user viewpoint based on the subsequent user navigation input, determine a user viewpoint misprediction based on the predicted user viewpoint and the actual user viewpoint, and reconstruct a viewport for the actual user viewpoint from the rendered rendering surface.

Abstract: An optical element includes a gain chip, a ring modulator, which is a band-pass filter, a first optical waveguide and a second optical waveguide that are optically connected to the ring modulator, and a heater, wherein the first optical waveguide and the second optical waveguide are formed to be equal in optical path length (have no difference in optical path length) between a first light coupling point and a second light coupling point and equal in shape and length between the first light coupling point and the second light coupling point (to be symmetrical with the ring modulator interposed therebetween (with respect to the ring modulator)).

Abstract: An apparatus and method for efficient image reprojection in a virtual reality system. For example, one embodiment of an apparatus comprises: a sensor interface to collect motion data from one or more sensors during a virtual reality session; graphics circuitry to execute graphics program code to render an image frame during the virtual reality session; a processor to generate motion transform data using the motion data, the motion transform data specifying how the image frame is to be adjusted prior to display; a reprojection engine to perform an in-line reprojection of the frame using the motion transform data to generate a reprojected image frame; and display circuitry to display the reprojected frame.

Abstract: Various embodiments of a millimeter-wave wireless point-to-point or point-to-multipoint communication system which enables determining preferred directions of transmissions, and transmitting in such preferred directions without routing radio-frequency signals. The system comprises a millimeter-wave focusing element, multiple millimeter-wave antennas, and multiple radio-frequency-integrated circuits (“RFICs”). In various embodiments, preferred directions are determined, and millimeter-wave beams are transmitted in the preferred directions.

Abstract: A method of amplifying a phase shift, comprises: receiving an input signal in response to an output signal; generating a reference signal; varying a modulation of at least one of the signals such that a ratio between modulation amplitudes of the input and reference signals is at least 0.9 and at most 1.1, and a phase difference between the reference and the input signals is from about 0.9 pi to about 1.1 pi; forming an output signal which comprises a sum of the reference and input signals, following the variation; and filtering the output signal by a bandpass filter to form a filtered output signal, wherein a bandwidth of the bandpass filter is selected such that XG<0.1, wherein X is a noise fluctuation average of the filtered output signal, and G is an expected amplification factor of a phase shift between the input and the reference signals.

Abstract: A phased array antenna panel includes an array of antenna cells. Optionally, the phased array antenna panel includes a frame with multiple shielding fences housing the array of antenna cells. Each antenna cell includes a raised antenna patch with air dielectric. In one example, the raised antenna patch may include four projections having outwardly increasing widths, and four supporting legs, each of the four supporting legs situated between a pair of adjacent projections. A first differential feed port may be coupled to first and second supporting legs of the raised antenna patch through first and second transformers, and a second differential feed port may be coupled to third and fourth supporting legs of the raised antenna patch through third and fourth transformers. A return loss in a frequency range of between 27.5 GHz and 29.5 GHz of each antenna cell is less than about ?10 dB.

Abstract: A read chamber device disclosed for use within a radio frequency identification (RFID) scanning enclosure which provides a means of reading a plurality of cartons moving through the enclosure via a conveyor belt. The enclosure is positioned over a section of the conveyor belt, such that the plurality of cartons on the conveyor belt pass directly through the enclosure. The read chamber device that may be positioned centrally to the enclosure and projects a read zone via an antenna positioned centrally within the read chamber device. The read chamber device provides for tuning the read zone via a movable metal plate comprising absorber material components secured to it, that is positioned at variable distances to partially or fully cover the read zone. The metal plate is moved into the read zone to obstruct a percentage of radio frequency energy from escaping the read zone, and thus narrowing the total read field.

Abstract: Systems and methods for autonomous signal modulation format identification are disclosed. In an example embodiment of the disclosed technology, a method includes mapping an input signal to Stokes space to determine whether a considered number of three-dimensional clusters value is above or below a predetermined value. The method may include selecting a modulation format from a first set of modulation formats if the considered number of three-dimensional clusters value is above the predetermined value. The method may further include applying higher-order statistics if the considered number of three-dimensional clusters value is below the predetermined value.

Abstract: An electron microscope is offered that is capable of achieving noise cancellation which results in a low level of noise and which can be implemented at high speed. An electron microscope (1) associated with the present invention includes: an electron beam source (11) for producing an electron beam; a noise detector (4) for detecting a part of the beam to thereby produce a beam detection signal and dividing a dividend by the beam detection signal; at least one image signal detector (6) for detecting an image signal obtained by making the beam impinge on a sample (A); and an arithmetic section (60) for performing a multiplication between an output signal of the image signal detector (6) and an output signal of the noise detector (4).

Abstract: Subject matter disclosed herein relates to arrangements and techniques that provide for harvesting thermal energy within a display, for example an electrowetting display, of an image display apparatus and converting the thermal energy into electricity. The electrowetting display comprises a first substrate and a second substrate opposite to the first substrate, a plurality of pixel portions defined between the first substrate and the second substrate, and a hydrophobic surface on the first substrate. A first fluid is included within the pixel portions and on the hydrophobic surface, while a second fluid is included on the first fluid, wherein the second fluid is substantially immiscible with the first fluid. A pyroelectric layer is included between the first substrate and the second substrate, wherein the pyroelectric layer is configured to absorb thermal energy within the electrowetting display and output a voltage based upon the thermal energy.

Abstract: A bolometric detector includes a substrate; bolometric detection microbridges suspended above the substrate and thermally insulated from the substrate; bolometric compensation microbridges suspended above the substrate and thermalized to the substrate; and a read circuit formed in the substrate to apply a biasing to the detection microbridges and to the compensation microbridges and to form differences between signals generated by detection microbridges and signals generated by compensation microbridges under the effect of the applied biasing. Each detection microbridge and each compensation microbridge includes electrically-conductive anchoring nails connected to the read circuit, a membrane attached to the anchoring nails above the substrate, and a thermometric element arranged in the membrane. The detector further includes thermal short-circuit elements between the membrane of each compensation microbridge and the substrate.

Abstract: A passive radiometric imaging device and a corresponding method for scanning a scene and reconstructing an image of said scene provide an improved image quality. The device comprises a radiometer for detecting radiation and a processing means for subsequently determining pixel values of pixels of the image to be reconstructed. A cost calculation unit calculates costs for the radiation samples of said data sub-set according to a predetermined cost function, said costs indicating the level of noise in the respective radiation sample. An optimization unit determines a pixel value as a label value from a set of label values, a label indicating a radiation sample or a group of radiation samples of the respective data sub-set, by determining an extremum of energy values determined for different radiation samples or different groups of radiation samples of the respective data sub-set by use of an energy function.

Abstract: For example, display image input units 131R, 131L detect additional information indicating left and right directionality from images for display. Then, in a stereoscopic display device having a display device for the right eye and a display device for the left eye, a switcher 132 capable of switching the connections between input and output input-output is controlled so that the correct image for display is provided to the correct display device. With such a configuration, even when the cables are connected incorrectly, it is still possible to input stereoscopic images to the stereoscopic display device so that such images are always displayed in the correct left-right relation.

Abstract: The invention relates to a water treatment using an UV AOP. The invention combines an UV AOP (11) applied to a water containing a free chlorine species (8) with a chemical post treatment (14), a quenching. The quenching (14) is applied to said water (9) after the UV AOP (11) able to reduce a remaining content of said free chlorine species in said water (9).

Abstract: The present invention relates to a method and a device for calibrating an irradiation device of an apparatus for generatively manufacturing a three-dimensional object. The calibration includes steps of arranging an image converter plate (12) in or in parallel to a working plane of the apparatus, wherein the image converter plate (12) outputs detectable light (13), when the irradiation device irradiates predetermined positions of the image converter plate (12) with energetic radiation; of scanning the image converter plate (12) by the irradiation device; of detecting the detectable light (13) by a light detector (15); of determining coordinates of the irradiation device, when the detected light (13) is detected; of comparing the determined coordinates with predetermined reference coordinates; and of calibrating the irradiation device on the basis of a deviation between the determined coordinates and the reference coordinates.

Abstract: Systems and methods which provide modeling or simulation of gamma ray (GR) tool response using a hybrid analytical and numerical technique are shown. Embodiments employ a GR tool simulation technique which provides gamma ray information simulated as a function of only the gamma particles which reach the detector without scattering. Embodiments utilize a discretization function to determine the gamma particles which would reach a point detector from each unit volume source of an investigation domain without scattering. Embodiments further utilize the foregoing discretization function with respect to a plurality of point detectors, wherein the particular number and configuration of point detectors are selected to relatively accurately simulate the results of a particular GR detector configuration, such as line detector or volume detector configurations.

Abstract: There is described a sensor device for spectrally resolved capture of optical detection radiation which emanates from a value document transported through a capture area of the sensor device in a predefined transport direction, comprising a detection device for spectrally resolved detection of the detection radiation in at least one predefined spectral detection range and emission of detection signals which represent at least one, in particular spectral, property of the detected detection radiation, at least one reference radiation device which emits optical reference radiation which is coupled into a detection beam path of the detection device at least partly in dependence on the position of a value document relative to the capture area, and which has a spectrum with a narrow band which is within the predefined spectral detection range, and/or at least one spectrum with an edge which is within the predefined spectral detection range, and a control and evaluation device which is configured for employing the d

Abstract: Provided is a terahertz wave generator that improves efficiency of generating a terahertz wave. The terahertz wave generator includes a generating layer for generating the terahertz wave, a waveguide layer for propagating excitation light entering the generating layer and a terahertz wave generated by the excitation light entering the generating layer, and a first confinement layer for confining in the waveguide layer the excitation light propagating in the waveguide layer and the terahertz wave propagating in the waveguide layer. The generating layer, the waveguide layer, and the first confinement layer are laminated in the stated order.

Abstract: A method and system for mitigating the effectiveness of IEDs are disclosed. The method can include detecting IEDs by sensing the presence of a non-linear electronic component of an IED. The presence of a non-linear electronic component of the IED can be detected by illuminating the device with a high power microwave signal containing a plurality of radio frequencies of electromagnetic radiation and receiving sum and/or difference frequency components that are produced by interaction of the illuminating signals with a non-linear IED component and subsequently re-radiated.

Abstract: A method for correcting PET emission data for prompt gamma emission background components present in non-pure positron-emitting isotopes uses a two component fit of modeled scatter and modeled prompt gamma emission in the area of scatter tails in a normalized emission sinogram. The method allows a PET scan using non-standard PET isotopes to be quantitative and thus more clinically useful.

Abstract: The present invention provides an optical semiconductor device including a semiconductor thin film (4) having photoconductivity and a pair of electrodes (5) and (10) for applying an electric field to an inside of the semiconductor thin film (4) in a direction approximately vertical to a surface of the semiconductor thin film (4), wherein the semiconductor thin film (4) generates an electromagnetic wave when light is applied to a region thereof to which the electric field is applied. The electrodes are provided to a front surface and a back surface of the semiconductor thin film (4) with the semiconductor thin film interposed therebetween.

Abstract: A change of a beam current of an ion beam which passes an outside of the side of a forestage beam restricting shutter, and which is incident on a forestage multipoints Faraday is measured while the forestage beam restricting shutter is driven in a y direction by a forestage shutter driving apparatus in order to obtain a beam current density distribution in the y direction of the ion beam at a position of the forestage beam restricting shutter. A change of a beam current of the ion beam which passes an outside of the side of a poststage beam restricting shutter, and which is incident on a poststage multipoints Faraday is measured while the poststage beam restricting shutter is driven in the y direction by a poststage shutter driving apparatus in order to obtain a beam current density distribution in the y direction of the ion beam at a position of the poststage beam restricting shutter.

Abstract: The present invention provides for an improved scanning process having microwave arrays comprised of microwave transmitters in radiographic alignment with microwave receivers. The microwave array emits controllably directed microwave radiation toward an object under inspection. The object under inspection absorbs radiation in a manner dependent upon its metal content. The microwave radiation absorption can be used to generate a measurement of metal content. The measurement, in turn, can be used to calculate at least a portion of the volume and shape of the object under inspection. The measurement can be compared to a plurality of predefined threats. The microwave screening system is used in combination with other screening technologies, such as NQR-based screening, X-ray transmission based screening, X-ray scattered based screening, or Computed Tomography based screening.

Abstract: A method and system for mitigating the effectiveness of IEDs are disclosed. The method can include detecting IEDs by sensing the presence of a non-linear electronic component of an IED. The presence of a non-linear electronic component of the IED can be detected by illuminating the device with a high power microwave signal containing a plurality of radio frequencies of electromagnetic radiation and receiving sum and/or difference frequency components that are produced by interaction of the illuminating signals with a non-linear IED component and subsequently re-radiated.

Abstract: A single interconnection unit provides all of the signal connections required to operate a group of PMTs and to transmit signals therefrom to acquisition electronics exterior to an enclosure for the PMTs in a nuclear scanner. In a preferred embodiment, the interconnection unit provides a shielded differential pair connection for RF signals; power supply connections for the PMTs, providing all of the voltages required to operate PMTs and the associated circuits, as well as connections for those signals and appropriate ground planes. Preferably, interconnection unit comprises a flex circuit with end connectors designed to connect to a power supply unit and an acquisition unit remote from the PMTs.

Abstract: Apparatus and methods for reducing the exposure of a human eye to external radio frequency (RF) radiation comprises eyeglass frames and/or a lens, positioned in front of the eye, and a material, intentionally added on or in the frames or lens, which is operative to shield, attenuate, or reflect high-frequency RF energy. The invention is also applicable to contact lenses without frames. The invention is also effective in shielding the human brain and other tissues. In the preferred embodiments, the material is operative to shield, attenuate, or reflect energy in the range of 100 MHz to 30 GHz and/or provide an RF power reduction of at least 25 percent. The material may include ferrite beads. Embedded components may include an RF detector and circuitry to actively attenuate the level of RF energy received in response to the detected level, or an RF detector and circuitry to alert a user as to the level of RF energy received in response to the detected level. The alert may be visual or audible.

Abstract: The present invention provides for an improved scanning process having microwave arrays comprised of microwave transmitters in radiographic alignment with microwave receivers. The microwave array emits controllably directed microwave radiation toward an object under inspection. The object under inspection absorbs radiation in a manner dependent upon its metal content. The microwave radiation absorption can be used to generate a measurement of metal content. The measurement, in turn, can be used to calculate at least a portion of the volume and shape of the object under inspection. The measurement can be compared to a plurality of predefined threats. The microwave screening system can be used in combination with other screening technologies, such as NQR-based screening, X-ray transmission based screening, X-ray scattered based screening, or Computed Tomography based screening.

Abstract: A process for constructing a three-dimensional geologic model of a subsurface earth volume wherein resolution scales of multiple diverse data types, including seismic data, are accounted for by generating multiple frequency passband models and combining them together to form the complete geologic model. Preferably, a model is generated for each of a low-frequency passband, a mid-frequency passband, and a high-frequency passband. When integrating seismic data into the modeling process, the seismic-frequency passband constitutes the mid-frequency passband model. The process further contemplates updating tentative frequency-passband models through optimization of assigned rock property values in each tentative model according to specified geological criteria. Such optimization is carried out by perturbation of the rock property values in a manner wherein the frequency content of each model is maintained.

Abstract: A radiometer imaging system includes an antenna array having a plurality of sub-arrays, each being formed of a plurality of antenna elements arranged in a sub-Y-type, a receiver array having the same number of receivers as the antenna elements, each receiver being associated with one of the antenna elements in a one-to-one correspondence to thereby define a channel to generate a first signal and a second signal from an output of each antenna element, and a correlation processor for calculating a correlation for each correlated channel pair, by using the first signal and the second signal for each antenna element, to thereby obtain an 3-D image for the object.

Abstract: A dielectric profiler establishes a dielectric profile of microwave characteristics for identifying, sterilizing or inactivating a target material prior to performing a microwave irradiation event to sterilize or inactivate the target material.

Abstract: A single interconnection unit provides all of the signal connections required to operate a group of PMTs and to transmit signals therefrom to acquisition electronics exterior to an enclosure for the PMTs in a nuclear scanner. In a preferred embodiment, the interconnection unit provides a shielded differential pair connection for RF signals; power supply connections for the PMTs, providing all of the voltages required to operate PMTs and the associated circuits, as well as connections for those signals and appropriate ground planes. Preferably, interconnection unit comprises a flex circuit with end connectors designed to connect to a power supply unit and an acquisition unit remote from the PMTs.

Abstract: This invention provides the three novel La,Fe, La,Cr and Sm,Fe substituted barium titanate solid solution ferroelectric compositions with the formula Ba1-xLnxTi1-xMxO3 wherein when Ln is La, M is Fe or Cr, when Ln is Sm, M is Fe and x is from about 0.02 to about 0.06 and mixtures thereof, the novel La,Fe substituted barium strontium titanate solid solution ferroelectric compositions with the formula (Ba1-ySry)1-xLaxTi1-xFexO3 wherein y is greater than zero and less than about 0.6 and x is from about 0.01 to about 0.06 and the novel La,Al substituted barium strontium titanate solid solution ferroelectric compositions with the formula (Ba1-ySry)1-xLaxTi1-x/4-3a/4Ala(x-a)/4O3 wherein denotes a vacancy, y is greater than zero and less than about 0.6, a is from about 0.01 to about 0.06 and x is from 0.02 to about 0.10 with the proviso that x is greater than or equal to a.

Abstract: A radiometer system includes a housing and an RF board contained within the housing. Balanced radiometer channels receive an unknown signal and known reference. Each balanced radiometer channel includes at least one quadrature hybrid and amplifier circuit to provide distributed gain and an amplified output signal. A detection circuit receives and detects the amplified output signal forming a detected signal. A controller board is contained within the housing and has an integration circuit and microcontroller that receives the detected signal and performs video signal digitization and conditioning and real-time corrections on any radiometer channels to account for changes in temperature or gain.

Abstract: A radiometer includes a housing and an RF board carried by the housing. A hybrid and amplifier circuit receives an unknown signal and a known reference signal. A switch receives signals as inputs from the hybrid and amplifier circuit and switches between the inputs. A detection circuit receives and detects the signal from the switch forming a detected signal. A controller board is carried by the housing and an integration circuit and processor receive the detected signal and produces a digital output.

Abstract: A detector that may contain a glow discharge ionizer and a photo-ionizer. The existence of both ionizers may increase the accuracy and number of chemical compounds that can be simultaneously monitored for chemical screening applications. The detector is particularly useful for screening explosives, chemical agents, and other illicit chemicals.

Abstract: A sample inspection system having a sample stage holding a sample to be inspected, electron beam optics so as to radiate an electron beam to the sample, a detector unit that detects a secondly generated signal generated in response to radiation of the sample by the electron beam, a storage for storing a plurality of images obtained from the generated signal and information for classifying the plurality of images by a type of defect in the sample, and an image processing unit. The image processing unit retrieves any of the plurality of images and classifies the retrieved image depending on the type of defect including an electrical defect and a defect in the figure.

Abstract: A method determines power of a modulated signal that is applied to a wavelength meter by summing bin values within a designated bin range of a frequency transformed interferogram representing the modulated signal and provided by the wavelength meter. In a first embodiment of the method, the bin range within which the bin values are summed is designated by mapping a series of signal characteristics indicative of the types of the modulated signals applied to the wavelength meter, to a series of bin spans within the frequency transformed interferograms that represent the modulated signals. The method then enables a selection of a signal characteristic from the series of signal characteristics to identify the modulated signal that is applied to the wavelength meter.

Abstract: This invention provides the three novel La,Fe, La,Cr and Sm,Fe substituted barium titanate solid solution ferroelectric compositions with the formula Ba1?xLnxTi1?xMxO3 wherein when Ln is La, M is Fe or Cr, when Ln is Sm, M is Fe and x is from about 0.02 to about 0.06 and mixtures thereof, the novel La,Fe substituted barium strontium titanate solid solution ferroelectric compositions with the formula (Ba1?ySry)1?xLaxTi1?xFexO3 wherein y is greater than zero and less than about 0.6 and x is from about 0.01 to about 0.06 and the novel La,Al substituted barium strontium titanate solid solution ferroelectric compositions with the formula (Ba1?ySry)1?xLaxTi1?x/4?3a/4Ala}(x?a)/4O3 wherein } denotes a vacancy, y is greater than zero and less than about 0.6, a is from about 0.01 to about 0.06 and x is from 0.02 to about 0.10 with the proviso that x is greater than or equal to a.

Abstract: A radiometer includes a housing and an RF board carried by the housing. A hybrid and amplifier circuit receives an unknown signal and a known reference signal. A switch receives signals as inputs from the hybrid and amplifier circuit and switches between the inputs. A detection circuit receives and detects the signal from the switch forming a detected signal. A controller board is carried by the housing and an integration circuit and processor receive the detected signal and produces a digital output.

Abstract: Storage film (10) serving to produce latent X-ray images in lieu of conventional X-ray film, containing storage particles (20) which are held together by a binding agent (22) and in which metastable electronic excited states can be produced. The refractive index of the binding agent (22) and the storage particles (20) are selected in such a way that they are equally high so that the storage layer (12) formed by the storage particles (20) and the binding agent (22) behave like an optically homogenous body.

Abstract: This invention provides the three novel La,Fe, La,Cr and Sm,Fe substituted barium titanate solid solution ferroelectric compositions with the formula Ba1-xLnxTi1-xMxO3 wherein when Ln is La, M is Fe or Cr, when Ln is Sm, M is Fe and x is from about 0.02 to about 0.06 and mixtures thereof, the novel La,Fe substituted barium strontium titanate solid solution ferroelectric compositions with the formula (Ba1-ySry)1-xLaxTi1-xFex O3 wherein y is greater than zero and less than about 0.6 and x is from about 0.01 to about 0.06 and the novel La,Al substituted barium strontium titanate solid solution ferroelectric compositions with the formula (Ba1-ySry)1-xLax Ti1-x/4 3a/4Ala(x-a)/4O3 wherein denotes a vacancy, y is greater than zero and less than about 0.6, a is from about 0.01 to about 0.06 and x is from 0.02 to about 0.10 with the proviso that x is greater than or equal to a.

Abstract: Methods and systems for dynamic virtual convergence (218) and a video see through head mountable display (200) that uses dynamic virtual convergence are disclosed. A dynamic virtual convergence algorithm (218) includes sampling an image with two cameras. The cameras each have a field of view that is larger than a field of view of displays used to display images sampled by the cameras (210). A heuristic is used to estimate the gaze distance of the viewer. The display frustums are transformed so that they converge at the estimated gaze distance. The images sampled by the cameras (210) are then reprojected into the transformed display frustums. The reprojected images are displayed to the user to simulate viewing of close range objects.

Abstract: The present invention provides a flame-retardant electromagnetic wave absorber that exhibits excellent formability and electromagnetic wave-absorbing properties, and can be easily assembled and constructed. The electromagnetic wave absorber comprises a wave-absorbing body and a base plate supporting the bottom thereof, wherein the wave-absorbing body is formed in a pyramid shape by fitting polygonal wave-absorbing plates into each other.

Abstract: A radiographic camera has a housing, having first and second ends, that encloses a conduit having a radiographic source. The conduit is in communication with a lock assembly at the back end of the camera and to a connector assembly at the front end of the camera. The radiographic camera can be held within a jacket that has a handle with a reinforcement structure. The conduit is surrounded by a radiation shield that has a shield end attached to an endplate having a port outlet. The connector assembly features a front plate having a hole aligned with the port outlet on the endplate. The front plate features an internal surface to which a rotor is rotatably attached. The rotor provides a first rotor hole that is aligned with the port outlet and includes a port shield for blocking the first rotor hole, and a second rotor hole that is alignable with the port outlet. The rotor may be rotated so that either the first or second rotor hole is aligned with the port outlet to shield or expose the source.

Abstract: A method and apparatus for the detection of radioactive material in an area is disclosed. The apparatus comprises a transmitter operatively arranged to transmit electromagnetic radiation, a receiver operatively arranged to measure an intensity of the electromagnetic radiation, and processing means operatively arranged to determine the presence of radioactive material based on the intensity measurement. Two receiver configurations are possible. In the first, the receiver measures the intensity of the electromagnetic radiation reflected by ion tracks in the air proximate to the area scanned for radioactive material. Alternatively, the receiver measures the intensity of the electromagnetic radiation transmitted by the air proximate to the area scanned for radioactive material.