Abstract: A method of adjusting a map area displayed on a portable electronic device includes displaying a map of a current location of the portable electronic device on a display of the portable electronic device, calculating a current speed of the portable electronic device, and adjusting data shown on the display by hiding menu information and increasing a size of the displayed map when the current speed of the portable electronic device is greater than a threshold value.

Abstract: An on-vehicle apparatus includes a microphone which inputs voice produced by a user, a speech example provision unit which provides a speech example for the user before the voice input is performed using the microphone, a hard disk device which stores registration information which is registered and updated in response to operations performed by the user and which includes an address itself or unique information used to specify the address, and a speech example setting unit which reads the registration information stored in the hard disk apparatus and set the address corresponding to the registration information as the speech example.

Abstract: To facilitate various functionality related to interactions between a portable device and a vehicle head unit, systems and methods (i) efficiently provide audio navigation instructions to a vehicle head unit; (ii) enable data exchange between a portable device which is not in direct communication with a vehicle head unit and the vehicle head unit; and (iii) provide visual output in response to user gestures in an automotive environment.

Abstract: A navigation apparatus includes storage configured to store a graphic map and a photographic map, a controller configured to control to convert the photographic map into the graphic map to display the graphic map when the photographic map and actual topography or the photographic map and the graphic map include mutually different positions in a photographic map display mode, and a display configured to display the graphic map or the photographic map and display a current position of a vehicle on the graphic map or the photographic map.

Abstract: Aspects of the present disclosure relate generally to identifying and displaying traffic lanes that are available for autonomous driving. This information may be displayed to a driver of a vehicle having an autonomous driving mode, in order to inform the driver of where he or she can use the autonomous driving mode. In one example, the display may visually distinguishing between lanes that are available for auto-drive from those that are not. The display may also include an indicator of the position of a lane (autodrive or not) currently occupied by the vehicle. In addition, if that lane is an autodrive lane the display may include information indicating how much further the vehicle may continue in the autonomous driving mode in that particular lane. The display may also display information indicating the remaining autodrive distance in other lanes as well as the lane with the greatest remaining autodrive distance.

Abstract: A server includes: an allocation unit that switches areas responsible for the respective meter readers based on an order for allocating a plurality of meter readers of a meter reader management unit and an order for allocating areas of an area management unit to allocate the switched area to the respective meter readers; and an instructing unit that instructs the allocated meter readers to read the corresponding areas.

Abstract: A sensor unit for sensing the angular position of a rotating element with respect to a fixed element includes a target fastened to the rotating element and a given number of sensing cells. Each sensing cell is connected to a connection device adapted to provide power supply, transmit data delivered by the sensing cells and connect each sensing cell to the ground. The sensor unit provides an output connector for electrically connecting the sensor unit to a reception device, a power supply system and the ground, via a connection cable having at least two connection wires. The connector includes, for each wire of the connection cable, a connection pin having a clamp portion adapted to receive an end of the wire, and a plug portion adapted to make a pressing contact with the connection device.

Abstract: A method and an apparatus (280) for determining an estimate of a position of a hydraulic subsea actuator (200), wherein the hydraulic subsea actuator (200) has a fluid port (220) fluidly connected to a fluid source (260). The apparatus (280) comprises a hydraulic cylinder (310) connected in series between the fluid source (260) and the fluid port (220) of the hydraulic subsea actuator, and a movable piston (320) arranged in the second hydraulic cylinder (310), a position determining device, arranged to determine a position of the movable piston (320), and a signal processing device (350), arranged to calculate the estimate of the position of the hydraulic subsea actuator based on the position of the movable piston.

Abstract: A magnetic sensor for detecting the position of a magnet in an X direction includes two magnetic sensor elements which are disposed to be spaced apart from each other in a Y direction and are disposed to face the magnet in a Z direction, in which a soft magnetic body is provided to be located between the magnet and the two magnetic sensor elements and to be located between the two magnetic sensor elements, the two magnetic sensor elements are provided in a range in which magnetic flux which is generated from the magnet saturates magnetization of free magnetic layers of the two magnetic sensor elements, magnetization directions of fixed magnetic layers of the two magnetic sensor elements are the same as each other, and a bridge circuit is configured with the two magnetic sensor elements.

Abstract: A magnetic field rotation detection sensor that detects a rotation of a magnet, includes: a plurality of first magnetic sensor elements constituting a first bridge circuit; and a plurality of second magnetic sensor elements constituting a second bridge circuit, wherein sensitivity axes of the plurality of first magnetic sensor elements and sensitivity axes of the plurality of second magnetic sensor elements are oriented in directions where the sensitivity axes intersect each other, and the plurality of first magnetic sensor elements are disposed further inside than the plurality of second magnetic sensor elements.

Abstract: A scale is configured to measure a displacement or velocity of a rotating object. The scale includes a first region that includes a first mark row including a plurality of marks arranged in a first period, and a second region that includes a second mark row including a plurality of marks arranged in a second period having a phase continuity with the first mark row formed in the first region. A periodic mark row including the first mark row and the second mark row is formed over an entire circumference of the rotating object including the first region and the second region.

Abstract: Various embodiments related to a cart movement detection system for a dynamics track are disclosed. One disclosed embodiment includes a cart movement detection system for a cart on a dynamics track comprising an encoder system comprising a sensor system on the cart configured to read an encoder scale on the dynamics track and produce quadrature outputs representing an increment of movement of the cart on the dynamics track. The encoder system is further configured to obtain and encode pulse information from the quadrature outputs and transmit the encoded pulse information over an infrared channel. The cart movement detection system further includes a receiver system configured to receive the encoded pulse information transmitted over the infrared channel from the encoder system and determine from the encoded pulse information a direction of the increment of movement of the cart.

Abstract: An interferometer apparatus for an optical fibre system and method of use is described. The interferometer comprises an optical coupler and optical fibres which define first and second optical paths. Light propagating in the first and second optical paths is reflected back to the optical coupler to generate an interference signal. First, second and third interference signal components are directed towards respective first, second and third photodetectors. The third photodetector is connected to the coupler via a non-reciprocal optical device and is configured to measure the intensity of the third interference signal component directed back towards the input fibre. Methods of use in applications to monitoring acoustic perturbations and a calibration method are described.

Abstract: The present invention is directed to unmanned vehicle (UV) systems and methods. A method may include capturing data with at least one UV proximate an area of interest. The method may also include processing the data at a computing device. In addition, the method may include at least storing the processed data, sharing the processed data with another device, combining the processed data with related historical data, developing a model based at least partially on the processed data, determining at least one future task to be performed by the UV based at least partially on the processed data, or any combination thereof.

Abstract: A device including an optical sensor is provided. The device includes a window including a first region, a second region and a partial region located between the first region and the second region, an optical sensor located inside one region among the first region and the second region, and a light blocking part formed in the partial region of the window.

Abstract: Methods and systems for calibrating sensors on a computing device are described herein. In an example implementation, a computing device may perform a method to calibrate one or more sensors, which may include receiving an indication that a sensor has been calibrated. The computing device may further receive independent observations of a motion of a device from the calibrated sensor and a potentially non-calibrated sensor. The device may determine as independent estimation of motion based on the movement of the device corresponding to the outputs of the respective sensors. Based on whether or not the estimation of motion as provided by the potentially non-calibrated sensor is within a threshold variance of the estimation of motion as provided by the calibrated sensor, the computing device may provide instructions to adjust parameters of the non-calibrated sensor.

Abstract: A device having a sensor may be calibrated by obtaining a condition of a device incorporating the sensor and initiating a calibration operation for the sensor based, at least in part, on the condition of the device. The condition may be a motion state, a charging state, a pattern of motion, an orientation, a location, a surrounding environment measurement, sensor usage, an age of calibration, a quality of calibration, or any combination. Further, the sensor may be an accelerometer, a gyroscope, a magnetometer or a pressure sensor.

Abstract: In order to provide a thermal flow meter (300) for improving workability of a flow rate measurement device having a temperature measurement function for the measurement target gas (30) and measurement accuracy for measuring a temperature, the thermal flow meter is structured such that a flow rate measurement circuit package (400) having a protrusion (424) for measuring a gas temperature is formed through resin molding, an inlet port (343) opened to the upstream side of the measurement target gas (30) is formed, a protrusion (424) is arranged inside the inlet port, an inlet port (344) and an outlet port (345) are formed in the front and rear covers (303 and 304) along the protrusion (424), and the measurement target gas (30) received from the inlet port (343) flows along the protrusion (424). Since the measurement target gas (30) subjected to the measurement flows along the protrusion (424), it is possible to reduce influence of the heat from other heat resources and improve measurement accuracy.

Abstract: Microprocessor-based thermal dispersion mass flow meters (i.e., thermal anemometers) are described that use temperature sensing elements in its flow sensor probe(s) in addition to the two elements commonly used. Such systems allow for automatically managing changes in gas selection, gas temperature, gas pressure, and outside temperature. One mass flow meter described has a flow sensor with four temperature sensing elements, wherein one pair is provided in a temperature sensor probe and another pair in a velocity sensor probe. Another variation operates without a separate temperature sensor probe and integrates all function into a single three-sensor probe. Such a device may also be used in conjunction with a one- or two-sensor temperature probe.

Abstract: Microprocessor-based thermal dispersion mass flow meters (i.e., thermal anemometers) are described that use temperature sensing elements in its flow sensor probe(s) in addition to the two elements commonly used. Such systems allow for automatically managing changes in gas selection, gas temperature, gas pressure, and outside temperature. One mass flow meter described has a flow sensor with four temperature sensing elements, wherein one pair is provided in a temperature sensor probe and another pair in a velocity sensor probe. Another variation operates without a separate temperature sensor probe and integrates all function into a single three-sensor probe. Such a device may also be used in conjunction with a one- or two-sensor temperature probe.

Abstract: Microprocessor-based thermal dispersion mass flow meters (i.e., thermal anemometers) are described that use temperature sensing elements in its flow sensor probe(s) in addition to the two elements commonly used. Such systems allow for automatically managing changes in gas selection, gas temperature, gas pressure, and outside temperature. One mass flow meter described has a flow sensor with four temperature sensing elements, wherein one pair is provided in a temperature sensor probe and another pair in a velocity sensor probe. Another variation operates without a separate temperature sensor probe and integrates all function into a single three-sensor probe. Such a device may also be used in conjunction with a one- or two-sensor temperature probe.

Abstract: Microprocessor-based thermal dispersion mass flow meters (i.e., thermal anemometers) are described that use temperature sensing elements in its flow sensor probe(s) in addition to the two elements commonly used. Such systems allow for automatically managing changes in gas selection, gas temperature, gas pressure, and outside temperature. One mass flow meter described has a flow sensor with four temperature sensing elements, wherein one pair is provided in a temperature sensor probe and another pair in a velocity sensor probe. Another variation operates without a separate temperature sensor probe and integrates all function into a single three-sensor probe. Such a device may also be used in conjunction with a one- or two-sensor temperature probe.

Abstract: A flow sensor includes an auxiliary channel having an opening into which a fluid to be measured is taken; a sensor element that measures the flow of the fluid to be measured; a housing that accommodates electronic parts; and a resin cover. The flow sensor is configured such that junctions of the housing and the cover are formed in locations where first target weld portions, which are formed so that the circuit chamber is surrounded, face each other and second target weld portions, which are disposed for additional reinforcement of the joints, face each other on a bonding face of the housing and a bonding face of the cover with a step being provided. The positioning of the housing and the cover is determined, and the first target weld portions are welded to each other and second target weld portions are welded to each other by way of laser radiation.

Abstract: A sensor system (30) including a sensor assembly (10) for a fluid meter (5) is provided. The sensor assembly (10) includes one or more fluid conduits (103A, 103B). The sensor assembly (10) also includes a case (101) surrounding at least a portion of the one or more fluid conduits (103A, 103B). The sensor system (30) also includes a case support (300). The case support (300) surrounds at least a portion of the case (101). The case support (300) includes one or more ribs (330) that extend along at least a portion of the case (101) and contact the case (101) at least when the case (101) deforms outward by a threshold amount.

Abstract: A server system for remote monitoring includes a wireless communication interface, a processor, and a storage device. The wireless communication interface receives at least one data packet over wireless communications from a remote monitoring system. The processor processes the data packet including sensor information from a sensor coupled to the remote monitoring system. The storage device stores the sensor information.

Abstract: A method for determining and/or monitoring fill level of a medium in a container with a measuring device, which works according to the travel time measuring method, wherein measurement signals are transmitted toward the medium and are received, wherein from the high-frequency total measurement signal, composed by superimposing the transmitted measurement signals, the reflected wanted echo signals and the disturbance echo signals, a raw echo curve or digitized envelope curve is ascertained. The wanted echo signals and/or the disturbance echo signals in the raw echo curve or the digitized envelope curve are ascertained based on an ideal echo curve, which shows the amplitude of the echo signals of an ideal reflector as a function of the distance from the ideal reflector, and based on the ascertained wanted echo signal the fill level is determined.

Abstract: A method may comprise, on board a vehicle, identifying a volume of gaseous fuel in a tank based on a volume of liquid fuel in the tank, the liquid fuel comprising a first fuel and a second fuel, the gaseous fuel comprising essentially the second fuel, and identifying quantities of the first fuel and the second fuel in the tank based on a solubility of the second fuel in the first fuel.

Abstract: A probe operable to measure a fluid level including a tip movably mounted to a housing, the tip including a multiple of steps and a sensor mounted within the housing, the sensor selectively activated in response to movement of the tip toward the housing. A method of measuring a fluid within a chamber of a vehicle includes locating a probe with a tip including a multiple of steps into a fill port of a chamber, only one of the multiple of steps associated with the fill port; and pressing the probe toward the fill port such that a sensor within the probe is selectively activated in response to movement of the tip toward the housing, the sensor determining a distance to a fluid within the chamber.

Abstract: Apparatus and method for determining the filling level of a liquid in a container is provided. The apparatus includes at least one element coupled with a body at least partially immersed in the liquid, the at least one element transmitting and/or receiving acoustic signals. The at least one element may include an element that both transmits and receives acoustic signals, and may include elements that have a transmitting-only element and a receiving-only element. The acoustic signals generated by the at least one element propagate along a surface of the body, which may be solid or hollow. The body is arranged in such a manner that at least one part of a surface can be wetted by the liquid. The body has, at different container heights, regions which reflect the acoustic signals that may be detected and analyzed by a unit to determine the container liquid level.

Abstract: A housing of a liquid level detection device includes an inner case, which has a first wall portion, and a terminal, which has a projection that extends through the first wall portion and projects to an outside of the inner case. The first wall portion and the projection are covered with a covering portion. A first seal film, which connects between an outer peripheral surface of the projection and the first wall portion, is formed in an inside of the covering portion. A film thickness of the first seal film along an edge line of the terminal progressively increases toward the first wall portion.

Abstract: An occupant determination apparatus includes a weight sensor that senses a weight of an object on a seat of a vehicle, a lateral acceleration sensor that senses lateral acceleration of the vehicle, and a processing unit that performs an operation of occupant determination. The processing unit calculates a lateral acceleration difference that is an absolute value of a difference between first lateral acceleration at a time when the weight passes through a first load threshold value and second lateral acceleration at a time when the weight passes through a second load threshold value. The processing unit performs the occupant determination based on an occupant determination threshold value when the lateral acceleration difference is smaller than a lateral acceleration difference threshold value, and does not perform the occupant determination when the lateral acceleration difference is larger than the lateral acceleration difference threshold value.

Abstract: A checkout system includes a workstation having a data capture arrangement for capturing through a horizontal window a target associated with a product to identify the product being checked out at the workstation, and a scale for weighing the product at the workstation. The scale has a scale mechanism, and a weighing platter on which the product is placed for weighing. The weighing platter is integrated with the horizontal window and overlies the scale mechanism. The weighing platter projects past the scale mechanism and has a front end that overhangs the scale mechanism. Non-threaded, interlocking connectors, which are provided on the weighing platter and the scale mechanism, prevent the weighing platter from tipping if a force is exerted on the front end of the weighing platter. The weighing platter is mounted on, and removed from, the scale mechanism without the aid of tools.

Abstract: A method includes collecting a data for a time from sensors to a fixed monitoring system. The fixed monitoring system is fixedly coupled to a turbo-machinery and the sensors are configured to monitor the turbo-machinery, also, the time comprises at least one week. The method also includes recovering the data by coupling a portable machinery monitor to the fixed monitoring system and retrieving the data into the portable machinery monitor. The method also includes analyzing the data to determine one or more machinery conditions. The analyzing the data comprises analyzing the data via the portable machinery monitor, an external system, or any combination thereof.

Abstract: Provided a terahertz-wave detection element having high spatial resolution in which the occurrence of warping and a crack is suitably suppressed. The detection element includes: an electro-optic crystal layer in which a refractive index at an incident position of the terahertz wave changes in accordance with incident intensity of the terahertz wave; and a substrate supporting the electro-optic crystal layer. The detection element detects a spatial-characteristics distribution generated in probe light in superposition with the terahertz wave, thereby to detect the spatial intensity distribution of the incident terahertz wave. A joined part between the electro-optic crystal and the supporting substrate is an amorphous layer consisting of an oxide including a constituent element of the electro-optic crystal and the substrate, and also having a thickness of 1-50 nm. A thickness of the electro-optic crystal layer is 1-30 ?m.

Abstract: Provided a terahertz-wave detection element with high spatial resolution and suppressing a crack occurrence. A method of manufacturing the detection element capable of detecting a spatial intensity distribution of a terahertz wave includes: a step of forming an oxide layer on one main surface of a first substrate consisting of an electro-optic crystal; a step of joining the one main surface of the first substrate and a second substrate by an adhesive consisting; a step of thinning the first substrate of a joined body, to a thickness of 1-30 ?m by polishing the first substrate; and a step of obtaining a large number of terahertz-wave detection elements by cutting the joined body. The oxide layer is formed such that the first substrate becomes convex to a side of the one main surface by causing a tensile stress to act on it.

Abstract: Disclosed are methods and apparatus for reflecting, towards a sensor, extreme ultra-violet (EUV) light that is reflected from a target substrate. The system includes a first mirror arranged to receive and reflect the EUV light that is reflected from the target substrate, a second mirror arranged to receive and reflect the EUV light that is reflected by the first mirror, a third mirror arranged to receive and reflect the EUV light that is reflected by the second mirror, and a fourth mirror arranged to receive and reflect the EUV light that is reflected by the third mirror. The first mirror has an aspherical surface. The second, third, and fourth mirrors each have a spherical surface.

Abstract: In a sensor apparatus, in particular a sensor apparatus for detecting ambient conditions of a motor vehicle, wherein the sensor apparatus comprises at least one screen which predefines the detection angle of the sensor apparatus and a detector and wherein an optical component is disposed between the screen and the detector, a greater detection angle is to be achieved. This is achieved whereby the optical component has at least one first and one second concavely curved region, the first inner region is disposed adjacent to the optic axis, where the second region surrounds the first region and that the first region has a stronger concave curvature than the second region.

Abstract: According to various embodiments, a light microscope is provided.

Abstract: Systems and techniques for optical spectrometer detection using, for example, IR spectroscopy components and Raman spectroscopy components are described. For instance, a system includes a first electromagnetic radiation source configured to illuminate a sample with a first portion of electromagnetic radiation in a first region of the electromagnetic spectrum (e.g., an IR source) and a second electromagnetic radiation source configured to illuminate a sample with a second portion of electromagnetic radiation in a second substantially monochromatic region of the electromagnetic spectrum (e.g., a laser source). The system also includes a detector module configured to detect a sample constituent of a sample by analyzing a characteristic of electromagnetic radiation reflected from the sample associated with the first electromagnetic radiation source and a characteristic of electromagnetic radiation reflected from the sample associated with the second electromagnetic radiation source.

Abstract: Provided are an apparatus and method for calibrating an extreme ultraviolet (EUV) spectrometer in which a wavelength of a spectrum of EUV light used for EUV lithography and mask inspection technology can be measured accurately.

Abstract: An interference spectrophotometer including a movable mirror unit having a movable mirror capable of reciprocating movement; a stationary mirror; an infrared light source unit which emits an infrared light; a beam splitter; an interference light detection unit which detects light intensity information of light transmitted or reflected by a sample; a movable mirror velocity information detection unit which detects movable mirror velocity information for movable mirror; and a control unit which acquires the light intensity information and movable mirror velocity information and computes the absorption or transmission spectrum of the sample; wherein the interference spectrophotometer further comprises a storage unit which stores a target movable mirror velocity range, and control unit does not employ light intensity information obtained when the movable mirror velocity of movable mirror was outside the target movable mirror velocity range for computing the absorption or transmission spectrum of the sample.

Abstract: Snapshot spectral imagers comprise an imaging lens, a dispersed image sensor and a restricted isometry property (RIP) diffuser inserted in the optical path between the source image and the image sensor. The imagers are used to obtain a plurality of spectral images of the source object in different spectral bands in a single shot. In some embodiments, the RIP diffuser is one dimensional. An optional disperser may be added in the optical path, to provide further dispersion at the image sensor. In some embodiments, all imager components except the RIP diffuser may be part of a digital camera, with the RIP diffuser added externally. In some embodiments, the RIP diffuser may be included internally in a digital camera.

Abstract: A component measuring apparatus includes a plurality of light sources having different wavelengths, an irradiation unit that applies lights emitted from the plural light sources to a measurement object, a light receiving unit that receives at least one of light having transmitted through the measurement object and light having been scattered from the measurement object, and a measuring unit that measures intensity of the light received by the light receiving unit per wavelength.

Abstract: A method and system based on spectral domain interferometry for detecting intense THz electric field, allowing the use of thick crystal for spectroscopic purposes, in order to makes long temporal scans for increased spectral resolutions, and overcoming the limitation of over-rotation for presently available high power THz sources. Using this method and system the phase difference of approximately 8898? can be measured, which is 18000 times higher than the phase difference measured by electro-optic sampling (?/2).

Abstract: A system. The system includes a first beam path configured to transmit a first light beam having a first optical wavelength and a second beam path configured to transmit a second light beam having a second optical wavelength distinct from the first optical wavelength. A first beam splitter disposed at an intersection of the first beam path and the second beam path. The first beam splitter is configured to superimpose the first and second light beams to form a third light beam, the third light beam impinging on a first window of a sample cell. The sample cell defines an interior volume and is configured to transfer the third light beam from the first window to a second window along a light path within the interior volume. The light path comprises a plurality of segments. The third light beam undergoes at least one reflection at an end of each segment, wherein the light path passes through a gas sample disposed within the interior volume.

Abstract: A multi-angle colorimeter employs a multi-angle mode and a symmetrical arrangement mode in an optical arrangement. Light detection on both sides of the symmetrical arrangement is performed by a single photodetector unit. The photodetector unit is used on both sides, and thus, the device becomes simpler, without any impact on individual difference in characteristics of multiple photodetector units. Conversely, elements for illumination can be used on both sides. Also in a case where multiple photodetector units are used, the size and cost of the device can be reduced with the use of a photodetector unit having a relatively low wavelength resolution as a photodetector unit to be used on one side. This enables to reduce an attitude error due to relative tilting of a measurement surface while reducing the size and cost of the device.

Abstract: A gas measurement system for measuring the concentration of gaseous and/or vaporous components of a gas mixture by means of a color change of at least one reaction substance on a reaction support unit, which is arranged in at least two light permeable channels in such a manner that the color change on the reaction substance can be detected at low expense on a large number of separate positions. The detecting unit which detects the color change can be designed as a digital camera with an electronic image converter or image sensor, and an imaging optics system (e.g., a lens system). Related systems, methods, apparatus, and articles are also described.

Abstract: An occupancy sensor includes a passive infrared sensor (PIR sensor) and an infrared sensor (IR sensor). The occupancy sensor is configured to confirm occupancy or non-occupancy in dependence on signals measured by both the PIR sensor and the IR sensor.

Abstract: A readout circuit for an uncooled infrared focal plane array includes: a first biasing circuit for generating a detection output signal; a second biasing circuit for generating a first reference output signal; a first integration circuit; and an analog-to-digital circuit including: a ramp signal generating circuit for generating a ramp signal according to a second reference microbolometer of a third biasing circuit. In the readout circuit, subtracting and amplifying the detection output signal and the first reference output signal are provided by the integrator at an analog domain, while ratio counting is provided by an analog-to-digital converter during analog-to-digital conversion. Furthermore, a column level integrated readout channel utilizes only one reference microbolometer, and the chip level ramp signal generator also utilizes only one reference microbolometer. Therefore, a chip area is further saved, and noise sources are decreased.

Abstract: The present invention relates to the use, as a thin sensitive-material film for bolometric detection, of at least one material based on an alloy comprising at least one chalcogenide, said chalcogen element being chosen from sulfur, selenium, telluride and their mixtures, characterized in that said material furthermore contains a sufficient amount of carbon and/or boron to confer upon the material a temperature coefficient of resistivity value at 300° C. at least equal to 40% of the native value of the temperature coefficient of resistivity of said material at room temperature. The invention also relates to a bolometric device and its production process.