Abstract: Systems and methods for reducing a degradation effect on a signal are described. One of the methods includes pre-processing data based on a scan of a reference object and a scan of a substance. The reference object includes a material having an atomic number ranging from and including forty to sixty.

Abstract: Disclosed herein is a detection system for identifying an unidentified substance in a sample, comprising light emitting sources, where at least one of the light emitting sources emits light in the infrared region; a circuit board; a trigger, that activates a pulse of electrons from the circuit board to the light emitting sources; a detector; and a central processing unit, where fluorescence generated from the unknown unidentified substance that is illuminated by light from the light emitting sources is collected in the detector and analyzed in the central processing unit.

Abstract: A passenger screening system including a first gradiometer, and a second gradiometer disposed adjacent the first gradiometer. The first and second gradiometers are each configured to operate at a first frequency and a second frequency to facilitate detecting the presence of an explosive material. A method of operating the passenger screening system is also described herein.

Abstract: A method for fabricating a collimator assembly is provided. The collimator assembly includes a first collimator grid having a first surface and an opposing second surface, wherein the first collimator grid defines a plurality of cells. Each cell of the plurality of cells is aligned in a first direction and extends between the first surface and the second surface. The method includes coupling a reinforcing layer to the first collimator grid such that the reinforcing layer extends substantially perpendicular to the first direction.

Abstract: An integrated, multi-sensor, Level 1 screening device is described, which system provides a next-generation Explosives Detection System (EDS) that enables high throughput, while drastically reducing false alarms. In exemplary embodiments, the present system comprises a non-rotational, Computed Tomography (CT) system and a non-translational, X-ray diffraction (XRD) system, both in an inline configuration.

Abstract: The calibration tool is provided for use with a detector, such as a detector for detecting trace amounts of one or more substances of interest. The calibration tool includes a body with at least one reservoir for retaining the calibration solution therein. A nib projects from the body and communicates with the reservoir. The nib can be wiped across a detection surface and the detection surface then may be presented to a detector. The detector then can be calibrated for the particular substance of interest in the calibration solution. The calibration tool may include plural reservoirs isolated from one another and plural nibs for applying the calibration solution to a detection surface. A detector kit is also provided.

Abstract: A method to account for cross-talk among a plurality of coherent scatter detectors of a multi-detector inverse fan beam x-ray diffraction imaging (MD-IFB XDI) system. The MD-IFB XDI system includes a multi-focus x-ray source (MFXS) that emits radiation sequentially from a plurality of focus points denoted by F1, F2, . . . Fn with a running index i. The method includes measuring a diffraction profile Xk for each coherent scatter detector Dk of the plurality of coherent scatter detectors. The diffraction profile includes a spectrum of a number of photons measured in a plurality of corresponding coherent scatter detectors. Each coherent scatter detector Dk is corrected to remove scatter from a plurality of primary beams directed to remaining coherent scatter detectors of the plurality of coherent scatter detectors.

Abstract: A portable substance identification system and method are configured to identify at least one detection target faster and with greater accuracy than is possible using prior substance identification systems and/or prior substance identification techniques. An embodiment of the portable substance identification system includes a portable substance identification device containing a Raman spectrometer, and a collection stem that includes a dry collector. One or more reservoirs for a liquid medium and/or a reagent can be formed in a cartridge that is configured to couple with a portable substance identification device. The cartridge has a chamber in which the reagent, liquid medium, and a detection target picked up by the dry collector are mixed. A magnet, positioned at a slant angle, can be used to form at least one pellet of aggregated magnetic particles within a pellet forming area of the chamber. The pellet is formed to maximize its surface area.

Abstract: In a control system comprising control device adapted for, on the one hand, receiving signal indicating a first biometric datum (W), and, on the other hand, obtaining a second biometric datum captured (w?), at the level of the control device, the first and second biometric date are compared. Next, it is decided whether the first and second biometric data correspond on the basis of the comparison. Thereafter, at least a secret cryptographic key part (H(w)) is generated by applying cryptographic function to the first biometric datum.

Abstract: A method of improving the rate of detection of attempts at fraud when a person passes through a controlled space based on the use of different sets of parameters issuing from at least two different sensor systems, some sets of parameters being based on correlations of measurements issuing from various sensor systems. Learning is carried out so as to characterize various types of fraud to permit identification of attempts at fraud by correlation between measurements obtained and characterizations of each type of fraud for each set of parameters.

Abstract: Portable substance identification system and method are configured to identify at least one detection target faster and with greater accuracy than is possible using prior substance identification systems and/or prior substance identification techniques. An embodiment of the portable substance identification system includes a portable substance identification device containing a Raman spectrometer, and a collection stem that includes a collector. One or more reservoirs for a liquid medium and/or at least one reagent can be formed in the collection stem. The cartridge can include a chamber in which the reagents, liquid medium, and at least one detection target picked up by the collector are mixed. A magnet, positioned at a slant angle, can be used to form at least one pellet of aggregated magnetic particles within a pellet forming area of the chamber. The pellet is formed to maximize its surface area.

Abstract: A motion vector calculation method includes: processing for calculating multi-resolution data up to a predetermined resolution level L from a plurality of inputted image data; and processing for estimating motion vectors per resolution executing a matching step for temporarily calculating motion vectors minimizing an energy function within a predetermined range of the input motion vectors and a smoothing step for finally calculating the motion vectors by averaging the surrounding data. By using the motion vectors of the resolution level L finally calculated as input motion vectors of a further higher resolution level L-1, the processing for estimating motion vectors per resolution is successively repeated on image data of a high resolution, thereby calculating the motion vectors.

Abstract: System and method for XRD-based false alarm resolution in computed tomography (“CT”) threat detection systems. Following a scan of an object with a megavoltage CT-based threat detection system, a suspicious area in the object is identified. The three dimensional position of the suspicious area is used to determine a ray path for the XRD-based threat detection system that provides minimal X-ray attenuation. The object is then positioned for XRD scanning of the suspicious area along this determined ray path. The XRD-based threat detection system is configured to detect high density metals (“HDMs) as well as shielded Special Nuclear Materials (“SNMs”) based on cubic or non-cubic diffraction profiles.

Abstract: A method for determining the change in position of an object in an item of luggage using two X-ray images. The method includes allocating points to individual features in each X-ray image, and extracting the individual features to produce a set of extracted points for each X-ray image. The method includes searching for clusters in each set of extracted points. For each X-ray image a valuation function that displays different values when points of a cluster are close than when points of the cluster are not close is used to determine the proximity of each cluster. This permits analysis of the movement of the object to be performed by observing the proximities of the clusters.

Abstract: A method for automatically inspecting a container for a target material using a computed tomography (CT) scanning system includes performing an initial radiographic scan of the container. Based at least partially on projection data generated during the initial radiographic scan, at least one location within the container is identified that requires CT inspection. A dual energy CT scan of the at least one identified location within the container is performed based on a single energy algorithm or a dual energy algorithm. The dual energy CT scan includes a low energy scan of the at least one identified location and a high energy scan of the at least one identified location. Based on dual energy scan information generated during the dual energy CT scan, a determination is made to confirm or clear an alarm corresponding to the at least one identified location within the container.

Abstract: An X-ray diffraction imaging system is provided. The X-ray diffraction imaging system includes an X-ray source configured to emit an X-ray pencil beam and a scatter detector configured to receive scattered radiation having a scatter angle from the X-ray pencil beam. The scatter detector is located substantially in a plane and includes a plurality of detector strips. A first detector strip has a first width equal to a linear extent of the X-ray pencil beam measured at the plane in a direction parallel to the first width.

Abstract: A control entity communicates with an entity to be controlled so as to effect a control, a secret key being associated with the control entity. These entities share public parameters, a second public parameter being a combination of a first public parameter of the said plurality with the secret key. At the level of the entity to be controlled, a random value is generated, a first message is transmitted to the control entity, this first message comprising at least one value obtained by combining the first public parameter with the random value; and a second message is transmitted to the control entity, this second message comprising at least one value obtained by combining the first random value, a secret key of the entity to be controlled and a value received from the control entity. One of the values included in the first or the second message is based on the second public parameter.

Abstract: A system and methods for characterizing an unknown substance is described. One of the methods include determining an effective atomic number of the unknown substance as a first function of a first gradient of a first line.

Abstract: In an RF label identification system comprising a label reader and a plurality of labels, a unique and secret identifier being associated with each label, a first random number is sent from a label to the reader. A second random number is then sent from the reader to the label. In the RF label, a value of the encrypted identifier is then obtained by generating third and fourth random numbers in accordance with a probabilistic rule, by transforming the first and second random numbers in accordance with a determined function and by combining the identifier with the first and second random numbers, with the first and second transformed numbers and with the third and fourth random numbers. The value of the encrypted identifier is sent to the reader. After N repetitions of the above process, the reader identifies the RF label as a function of the N values of the encrypted identifier received, of the determined function, of the N first and second random numbers and of the probabilistic rule.

Abstract: A database comprising biometric data stored in encrypted form is managed by a management unit. It comprises a set of filters respectively associated with filter identifiers. A biometric data item is received at a management unit; next, said biometric data item is stored in an encrypted form at a given address in the database. Then keywords are obtained on the basis of a first set of hash functions and of the biometric data item. A subset of indexing filters is associated with each keyword by selecting, for each keyword, filters as a function of the respectively associated filter identifiers, of said keywords, and of a second set of hash functions; and the given address is associated with each of the filters of the subset of filters.