Abstract: The heat exchanger (10) includes a ceramic matrix composite (12) (stable at temperatures up to 1,650° C.) surrounding and defining a hot fluid conduit (14). A hardenable material (18) having a high thermal conductivity is formed into a heat transfer layer (16) surrounding the ceramic matrix composite (12). A metal pipe (20) is coextensive with the heat transfer layer (16) and defines at least a portion (22) of at least one cool fluid passage (24, 34, 54) defined adjacent to and in heat exchange relationship with the heat transfer layer (16) so that a fluid passing through the cool fluid passage (24, 34, 54) absorbs heat passing through the heat transfer layer (16) from the hot fluid passing through the hot fluid conduit (14).

Abstract: A method for operating a heat exchanger, through which a heat transfer medium flows on a primary side, entering the heat exchanger with a first temperature and exiting the heat exchanger with a second temperature. The heat transfer medium emits on a secondary side a heat flow to a secondary medium flowing through the heat exchanger in the case of heating or, in the case of cooling, absorbs a heat flow from the secondary medium which enters the heat exchanger with a third temperature and exits the heat exchanger again with a fourth temperature. The heat exchanger is capable of transferring a maximum heat flow. At least three of the four temperatures are measured and the respective saturation level of the heat exchanger is determined from these measured temperatures and is used for controlling the operation of the heat exchanger.

Abstract: A heat exchanger apparatus containing a heat exchanger and a thermally actuated bypass valve is described. The heat exchanger has a plurality of plates defining a first, a second and a bypass channels. A first fluid inlet manifold is in fluid communication with the first and the bypass channels. The bypass valve is positioned in the first fluid inlet manifold, and contains a sleeve having a first slot and a second slot, that permit fluid flow from a first fluid inlet to the bypass channel and to the first fluid inlet manifold, respectively. A drum is positioned within the sleeve and is movable from a first position to a second position. The drum has an aperture permitting first fluid flow to the first slot in the first position and to the second slot in the second position. An actuator engages the drum and actuates it to move from the first position to the second position.

Abstract: A hinged-breech weapon includes a receiver, a barrel part arranged to be tiltable around a rotational axis on the receiver, a front shaft removably fastened on the barrel part, and a bearing piece arranged on the rear end of the front shaft, when viewed in the firing direction of the hinged-breech weapon. The bearing piece includes rear bearing surfaces for pivotable mounting on the front mating surfaces of the receiver and a positioning device for adjustment of the position of the bearing piece relative to barrel part. The positioning device includes a clamping element movable in the bearing piece in the longitudinal direction of front shaft and adjustable by a control element for mounting on a stop arranged on the barrel part.

Abstract: An improved jig for manufacturing a firearm lower receiver is comprised of a power tool mount; an adapter; a guide plate with plate screws; a rear support with mounting screws; a front support; and at least one of a carriages with at least one locating pin. A guide plate is disposed below the top surface of a lower receiver in conjunction with an adapter. The jig is a universal fitment and includes a bearing to support a rotary tool and at least one guiding feature can be used to facilitate in the guidance of the rotary tool without placing the rotary tool in direct contact with any of the guidance features. A removable locating pin is situated a long the front and rear takedown pin holes of a firearm receiver that is not threaded and is provided with at least one of a pull, string or other handle.

Abstract: A noise suppression device for use with a firearm includes a body including an outermost external surface of the noise suppression device and an internal portion and a core seamlessly connected to the internal portion of the body, wherein the noise suppression includes no joints, no seams, or any formerly separate pieces within the body or the core, and the core includes a structure of a plurality of holes defined by a framework of a connecting structure that connects to the internal portion of the body. Optionally, the core can include one or more baffles or one or more chambers.

Abstract: In some embodiments, a crossbow comprises a stock and a bow portion comprising at least one limb and a string. In some embodiments, an accessory comprises a grip and a stirrup.

Abstract: A handheld archery release is convertible between hinge and trigger modes of operation. The release includes a handle which contains a sear assembly operable between hold and fire positions. Hinge and trigger assemblies are connected with the handle and with the sear assembly to operate the sear assembly in both modes of operation. A linkage assembly is connected with the handle and rotates the sear assembly toward the fire position when the trigger assembly is operated and biases the sear assembly in a first direction when the hinge assembly is operated.

Abstract: An air gun includes two different types of energy sources that may be used to fire a projectile. A first type of energy source may include an air cylinder having a piston that moves through a cylinder, as urged by a mechanical spring or gas strut, to create compressed air charge for firing a projectile. A second type of energy source may include a compressed gas storage tank that holds compressed air, or another propellant, that is released during firing to urge the piston through the air cylinder to create a compressed air charge for firing a projectile. An air gun may, additionally or alternately, include features that promote efficient delivery of a compressed air charge to a transfer port and projectile chamber, during firing. Examples of such features include piston configurations that reduce or prevent piston rebound through the interaction of the piston face and air cylinder, upon impact.

Abstract: A firearm that provides a user with tactile biofeedback. The firearm includes a tactile reference feature that extends longitudinally along an exterior body surface and is formed with dimensions specifically tailored to harness the user's natural attributes of sensibility, proprioception, and neuromuscular memory to improve a user's accuracy.

Abstract: A holster for carrying a handgun inside a wearer's beltline. In one embodiment, the holster includes a body-interface-surface (BIS) having a body-side (BS) and a gun-side (GS). A rigid mold is interfaced with the BIS. In another embodiment, the BIS may include a gun-lock region. A clip may be interfaced with the rigid mold. Other embodiments include methods of making and using a holster.

Abstract: An inner red-dot gun sighting device powered by a solar cell and provided with a micro-current LED light source comprises a housing (1) and a micro-current LED light source (6) disposed in the housing (1) or on the housing (1). A solar cell (2) is disposed on the housing (1). The solar cell (2) is connected to the micro-current LED light source (6) by using a conducting wire, so as to supply power to the micro-current LED light source (6). Power is supplied to the micro-current LED light source (6) by using the solar cell (2), so that the number of cells used is reduced and use costs are reduced; power supplies of the micro-current LED light source (6) are switched by using a dual-power supply automatic switching module.

Abstract: A weapon accessory includes a tactical rail attachment attachable to a firearm and a concealed weapon clip attached to the tactical rail attachment.

Abstract: An impact penetration resistant laminate comprises a plurality of alternating layers of (i) non-fibrous ultra-high molecular weight polyethylene monolayers and (ii) a thermoplastic adhesive, the adhesive having a basis weight of no greater than 5 gsm and a zero-shear-rate viscosity, determined from an oscillating disc rheometer in a frequency sweep between 0.1 rad/s and 100 rad/s, conducted per ASTM D 4440 at 125° C., and calculated from fitting to a Carrea-Yasuda four parameter model, of at least 1500 Pa-s, wherein (a) at least 90 percent of the monolayers are arranged such that the orientation of one monolayer is offset with respect to the orientation of an adjacent monolayer, and (b) the modulus of elasticity through the thickness of the laminate is at least 3 GPa.

Abstract: A violent intruder mitigation shield that provides a defender with ballistic protection along with options for communication, first aid, and counter-attack capability. The violent intruder mitigation shield may have a functional or decorative front layer that allows the shield to serve a secondary function in addition to functioning as a protective shield.

Abstract: A patrol vehicle protection system with a quick release bullet resistant transparent panel and door panel covering system that requires no permanent modifications to the patrol vehicle, offers head impact safety protection, and ventilation. The system includes a bullet resistant transparent panel that temporarily attaches to a door window opening mounting mechanism attached to the vehicle door. The mounting mechanism includes z-shaped upper and lower brackets designed to fit into the upper and lower slots formed around the window opening. An adjustment plate or brace holds the brackets in place in the slots. The transparent panel is securely held between the two brackets during normal use but automatically releases outward in a side impact collision. The system also includes a ballistic fabric panel that hangs from the lower bracket over the inside surface of the door panel to protect the driver's legs and lower torso of the driver sitting in the patrol vehicle.

Abstract: A portable, moving target system that generates variable movements and mimics movements of prey. Movement of the target system may be varied in speed and pattern.

Abstract: The present invention relates to a shooting training control system having a plurality of shooting lines arranged in parallel to each other to allow a plurality of shooters to be located thereon to conduct shooting and a shooting control room for controlling shooting training of the plurality of shooters, the shooting training control system including: isolation covers disposed on the respective shooting lines, forming isolation spaces from the ground to allow the shooters to be located therein, and having both sides isolated from the adjacent shooting lines thereto; opening and closing means for opening and closing each isolation cover from the ground; and switching means disposed in the shooting control room to control the opening and closing means, so that each isolation cover is open and closed to open and close the isolation space formed therein.

Abstract: A compression molded combined firework includes a plurality of tubular cavity bodies evenly distributed in parallel on a body. Upper ends of the tubular cavity bodies are open, lower ends of the tubular cavity bodies are closed. Chemicals for launching fireworks and effect parts are disposed in the tubular cavity bodies. Flash holes penetrating through the bottom surface of the body are formed in the closed ends of the tubular cavity bodies. Bottom surface openings of the flash holes are located in a wiring groove. A blocking groove is disposed in the wiring groove and between the bottom surface openings of the flash holes. The wiring groove is sealed with glue. The glue forms a closed ring shape along the cross section direction of a leading wire in the wiring groove, thereby blocking a channel where powder gas goes forwards along a gap, and eliminating the phenomenon of blaze.

Abstract: A water penetrating blowgun dart is provided. The blowgun dart has a funnel removably attached to a tail end of the dart shaft so that upon contact with a water surface, the funnel moves from an engaged configuration to a disengaged configuration. The tail end may provide a slot for snugly receiving an eye, wherein the tail end and the eye have cooperating grooves so that when in the engaged configuration, the eye and tail end are secured with a filament that slightly protrudes from the flush outer surface of the shaft and eye. The protruding filament frictionally engages the funnel in the engaged configuration so that the funnel remains engaged with the shaft prior to hitting the water's surface.

Abstract: A collapsible arrow having an outer shaft. An inner shaft is preferably in slidable contact with the outer shaft in order to aid longitudinal stability. In order to be shot with a bow, the inner shaft can be extended from the outer shaft; to be stored, the inner shaft can be retracted into the outer shaft. A locking mechanism having minimal aerodynamic impact holds the inner shaft in its maximum extend position for shooting and flight. Preferably, traditional aerodynamic stabilizers are located on the outer surface of the aft section of the inner shaft.

Abstract: An arrow shaft having a reinforced nock end includes an arrow shaft and a carbon fiber tube retained in a nock end of the arrow shaft. An end of the carbon fiber tube may be flush with the nock end of the arrow shaft or be inserted to a depth to provide clearance for a shaft of an arrow nock. The carbon fiber tube is secured to an inside perimeter of the arrow shaft with any suitable bonding substance. A length of the carbon fiber tube is at least 1.5 inches long, but no longer than 45% of a length of an arrow shaft.

Abstract: The present invention teaches an arrowhead of foam, having a front aperture leading to a front cavity: the front cavity is either an injectable paint cavity or a partial spherical shape, the aperture formed by the bisection of the cavity with the front end of the arrowhead and smaller in diameter than the cavity. The cavity diameter may be such that the resilience of the foam secures a paintball therein. The rear end of the arrowhead has a second aperture dimensioned and configured to secure an arrow shaft therein on a threaded connector. The arrowhead has a shock absorber mechanism and other details which provide for extreme cushioning of impact.

Abstract: This disclosure provides for payload delivery systems and cartridges and methods that incorporate the payload delivery systems. The payload delivery system can comprise a stabilizer having a longitudinally cut side wall defining a series of vanes that are folded forward in the pre-launched configuration. Cartridges that include the payload delivery system are disclosed, which can be used to deliver payloads such as solid projectiles, shot of all sizes, powders, gels, liquids, and other payloads to exploit their specific function.

Abstract: The present invention relates to warheads with blast wave conditioners and in particular to devices for quickly removing a door to permit entry through the doorway. It discloses a device and method of shaping the pressure wave pattern by the use of inert material. The inert material of the present invention is used to reduce localized directional effects occurring at the point of impact, instead generating a more diffuse pressure-wave pattern across the target surface.

Abstract: A device for the controlled breakdown of the shell of a warhead, wherein, by exploiting the hollow charge effect, the shell is substantially weakened and/or penetrated in the affected areas, thus enabling fragments of a desired size to form.

Abstract: A bullet with controlled fragmentation has a core in the form of a generally cylindrical body having a forward end and a rear end and intermediate side portions extending there between, the forward end of the core defining a cavity, a jacket encompassing the rear end and at least selected portions of the sides of the core, the jacket having a sidewall having a first drive band portion having a first wall thickness, and a second portion immediately forward of the drive band portion having a second thickness less than the first thickness, the exterior of the jacket defining a cannelure groove encircling the bullet, and the cannelure groove being positioned forward of the first drive band portion. The drive band may have forward edge defining a step. The bullet of the present invention may also be received in the case mouth of a rimless case and be partially protruding therefrom.

Abstract: A munition, such as a projectile formed of at least one reactive material. In one embodiment, the projectile includes a body portion formed of at least one reactive material composition wherein the at least one reactive material composition defines at least a portion of an exterior surface of the projectile. In other words, a portion of the reactive material may be left “unbuffered” or exposed to the barrel of a gun or weapon from which it is launched and similarly exposed to a target with which the projectile subsequently impacts. In one embodiment, the projectile may be formed with a jacket surrounding a portion of the reactive material to provide additional structural integrity. The projectile may be formed by casting or pressing the reactive material into a desired shape, or the reactive material may be extruded into a near-net shape and then machined into the desired shape.

Abstract: An automatic ammunition reloading system includes an actuation assembly in communication with a control system. The actuation assembly is joined to a reloading press by attaching to a control lever of the ammunition press so as to put the reloading press in operative relation with the actuation assembly. The control system receives input from a control lever position sensor to sense an extremity position of the control lever and to determine an actuation distance of the control lever for a full stroke of the reloading press. The control system controls operation of the actuation assembly so as to oscillate the control lever through the actuation distance.

Abstract: A hydrogen-propelled projectile for using with a firearm eliminates cleaning the firearm and a method of making the projectile eliminates storing explosive propellant. The projectile has a cylindrical brass body closed at top and sealed at bottom with a primer and a brass seal. When the projectile is used with the firearm, the primer ignites hydrogen in the presence of oxygen, producing water vapor and energy that propels projectile toward a target. To make the projectile a salt water solution is electrolyzed to produce hydrogen and oxygen. A mixture of hydrogen and oxygen is then fed to a loader. The loader fills up the projectile, attached at a gas outlet, with gas by exerting pressure on gas using a load piston and channeling gas to the projectile. Finally, the loader seals the projectile with the primer by pressing a primer ram and affixing the primer at bottom of the projectile.

Abstract: A tape measure marking attachment assembly includes a mount including a housing that has a top side, a bottom side, a front side, and a rear side. The top side has a slot extending downwardly therein that releasably receives and frictionally engages a tab of a tape measure. A receiver is positioned on the mount. A marking element is releasably engaged to the receiver.

Abstract: Provided is a comparator including: a substantially U-shaped frame; an anvil supported at one end of the frame in an advanceable and retractable manner; a spindle supported at another end of the frame coaxially with the anvil in an advanceable and retractable manner; a measurement unit that measures the advancement and retraction of the anvil; and a display unit that displays a measurement result of the measurement unit. The measurement unit includes: an anvil contact portion that rotates around a support shaft in accordance with the advancement and retraction of the anvil; an interlocking portion that is formed to have a length greater than the length of the anvil contact portion, is supported so as to be rotatable around the support shaft, and is coupled to the anvil contact portion; and a detection unit that detects a displacement of rotation of the interlocking portion.

Abstract: A system and method for creating and utilizing a construction aid for the construction of a mechanical structure is provided. Specifically, the disclosure may provide a visually transparent or semi-transparent, adhesive template capable of conforming to objects having curved and/or flat surfaces including indicia marked on portions thereof indicating, for example, the location, size, and type of fasteners to be used, or other construction information, is provided. The indicia may be comprised of lines and symbols of differing size, shape and color, as well as verbiage for additional assembly instructions. The adhesive template may be either visually or mechanically indexed to the mechanical structure.

Abstract: A method for determining measurement conditions of a roughness sensor having at least one measuring needle, a computer program product and a measuring device for carrying out the method are provided. The measuring needle is positioned on a surface in a rest state and rests on the surface without being moved. Measurement signals are recorded in the rest state. A signal line of the roughness sensor is electrically grounded and measurement signals are recorded in the grounded rest state. Further, a method for measuring a roughness of a workpiece surface by the roughness sensor is provided in which the measuring needle is guided along a surface section of the workpiece surface to be measured and moved in a measurement direction (x-direction). The movement of the measuring needle in a plane (yz-plane) perpendicular to the measurement direction is recorded during the movement of the measuring needle along the workpiece surface.

Abstract: A displacement sensor is disclosed for contactlessly measuring a relative position of a magnetic field source which produces a magnetic field and a magnetic field sensor in relation to each other, wherein the magnetic field source and the magnetic field sensor are movable relative to each other. Each magnetic field probe detects at least two spatial components of a magnetic flux density of the magnetic field. A storage unit stores individual position signals. A control and calculation unit calculates an output signal of the displacement sensor based on the position signals, and calculates a magnitude of the magnetic flux density and compare it with a predetermined threshold value to output a current calculated position signal for each magnetic field probe if the magnitude is greater than the threshold value and to output a preceding stored position signal if the magnitude is less than or equal to the threshold value.

Abstract: Embodiments relate to magnetic field angle sensors, including off-axis and on-axis sensors. In an embodiment, a magnetic field angle sensor comprises two sensor units, and each sensor unit comprises two sensor elements. The sensor units are spaced apart from one another and arranged proximate a magnet, wherein the two sensor elements of each sensor unit are responsive to the same magnetic field component induced by a magnet coupled to a shaft as the shaft rotates. In each sensor unit, a sum and a difference of the output signals of the two sensor elements can be calculated to determine a coarse estimation of a rotation angle, and a more refined estimation can be obtained by combining the coarse estimations of each sensor unit. In embodiment, the magnetic field angle sensor comprises a control unit or other circuitry to carry out this combining.

Abstract: A method corrects the position and deviation of a syringe needle in a machine for automatically preparing intravenous medication. The machine includes an automatic actuator, together with a control system, in which are placed the syringe and a one-dimensional position sensor including a measuring plane. The correction method includes steps in which the position sensor obtains position coordinates of a first and a second point of the needle, and steps of correcting the position and deviation error of the needle, by the control system of the automatic actuator.

Abstract: A broadband spectroscopic analysis is used for controlling a distance (d) between a miniature solid immersion lens (SIL, 60) and a metrology target (30?). An objective lens arrangement (15, 60) including the SIL illuminates the metrology target with a beam of radiation with different wavelengths and collects a radiation (709) reflected or diffracted by the metrology target. A mounting (64) holds the SIL within a distance from the metrology target that is less than the coherence length of the illuminating radiation (703). A detection arrangement (812, 818) produces a spectrum of the radiation reflected or diffracted by the metrology target. The distance between the SIL and the metrology target or other target surface can be inferred from spectral shifts observed in the detected spectrum. Servo control of the distance is implemented based on these shifts, using an actuator (66).

Abstract: A dimension measuring system includes a target positioning system mounted on a railroad track's parallel rails. The target positioning system includes two targets positioned at fixed positions in a first plane perpendicular to the rails, and another two targets positioned at fixed positions in a second plane perpendicular to the rails and spaced-apart from the first plane. A laser-based distance measuring device measures vector distances to the four targets. A processor, coupled to the laser-based distance measuring device, determines an elevation of each of the rails in the first plane and second plane using the vector distances and the fixed positions of the targets in the first and second planes. The elevation of each the rails in the first and second planes define a top-of-rail reference plane used by the processor when dimensions of an object above the top-of-rail reference plane are to be measured.

Abstract: The present invention provides a measurement apparatus for measuring a shape of a surface of an object, including a probe configured to be scanned on the surface of the object, a plurality of reference members configured to be arranged in a scanning direction of the probe, a plurality of detection units configured to be provided at different positions of the probe in the scanning direction and each configured to detect a distance from a reference member which has been selected from the plurality of reference members in accordance with a position of the probe in the scanning direction, and a processing unit configured to obtain shape information of the surface of the object by obtaining position information of the probe based on at least one of detection results of the plurality of detection units while scanning the probe.

Abstract: The invention relates to an optical measuring process for acquiring a surface topography of a measurement object. To this end, a measuring device with a measuring head in a measuring head guide device is provided for chromatic confocal acquisition of the surface topography or for spectral interferometric OCT acquisition of the distance to the surface topography. Firstly, spectrally broadband light of a light source from a fibre array with i fibres of i measurement spots is directed onto the measurement object via a common measuring head optic, with formation of a spot array of i measurement spots. i reflection spectra of the i measurement channels are then acquired and digitized. Finally, the digitized reflection spectra are evaluated with removal of time variations of systematic measurement errors and time-related deviation movements of the measuring head guide device.

Abstract: A series of structured lighting patterns are projected on an object. Each successive structured lighting pattern has a first and second subset of intensity features such as edges between light and dark areas. The intensity features of the first set coincide spatially with intensity features from either the first or second subset from a preceding structured lighting pattern in the series. Image positions are detected where the intensity features of the first and second subset of the structured lighting patterns are visible in the images. Image positions where the intensity features of the first subset are visible are associated with the intensity features of the first subset, based on the associated intensity features of closest detected image positions with associated intensity features in the image obtained with a preceding structured lighting pattern in said series.

Abstract: A laser measurement system for measuring up to 21 geometric errors, in which a six-degree-of-freedom geometric error simultaneous measurement unit and a beam-turning unit are mounted on either the clamping workpiece or the clamping tool, while an error-sensitive unit is mounted on the remaining one, the beam-turning unit has several switchable working postures and multi-component combinations in its installation state, it can split or turn the laser beam from the six-degree-of-freedom geometric error simultaneous measurement unit to the X, Y, and Z directions in a proper order, or the beam-turning unit can split or turn a beam from the error-sensitive unit to the six-degree-of-freedom geometric error simultaneous measurement unit. The present invention is of simple configuration and convenient operation. Up to 21 geometric errors of three mutual perpendicular linear motion guides are obtained by a single installation and step-by-step measurement.

Abstract: A vehicle wheel alignment system and method is provided for performing a rolling wheel axis of rotation and wheel spindle point calculation every time an alignment is performed. Embodiments include an aligner having a target fixedly attachable to a wheel of the vehicle; a camera for viewing the target and capturing image data of the target; and a data processor. The data processor receives the image data from the camera, and determines a vector pointing from the target origin to a wheel spindle point based on the captured target image data, when the vehicle is rolled while the wheel is on a substantially flat surface such that the wheel and target rotate a number of degrees. The data processor is further adapted to calculate an alignment parameter for the vehicle based at least in part on the wheel axis of rotation and the coordinates of the wheel spindle point.

Abstract: An interferometric method for profiling the topography of a sample surface comprises: (i) a first interferometric profiling step at a first magnification M1 to produce a map comprising pixels with planar (X,Y)-coordinates corresponding to the area of the sample surface, (ii) identifying pixel(s) which meet or exceed a Cut-Off Threshold, and meet or exceed a parameter NNAP; (iii) identifying pixel(s) for which no z-coordinate has been recorded; (iv) generating a Low Magnification Frame File (LMFF) which comprises the (X,Y) coordinates of the pixels derived from steps (ii) and (iii); (v) a second interferometric profiling step at a second magnification M2, wherein M2>M1, wherein only selected regions of the sample surface are analysed, said selected regions comprising the features associated with the (X,Y)-coordinates of the pixels in the Low Magnification Frame File; and further comprising a step selected from: (vi) analysing the output of the second interferometric profiling step to differentiate between a

Abstract: A method for determining the thickness of a brake disk of a pneumatic-tired vehicle, in particular a passenger vehicle or a commercial vehicle, including the steps of applying an ultrasonic measuring head on the brake disk, without dismounting the wheel associated with the brake disk; and carrying out an ultrasonic measurement for determining the thickness of the brake disk.

Abstract: A shape analysis method for analyzing shape data acquired by measuring a contour shape of a workpiece to be measured, includes: deciding a geometric element used in shape analysis; deciding one data point to be included in an evaluation range; applying the geometric element to an interval including the one data point; searching the widest interval for satisfying a threshold condition of a preset shape tolerance while changing a width of the interval; pinpointing two boundary points between which the interval found by the search is sandwiched; obtaining two edge points at which the two boundary points are respectively shifted by preset shift amounts; setting a range sandwiched between the edge points in the evaluation range; and targeting the shape data within the evaluation range for calculation of geometric properties.

Abstract: Aspects of the present disclosure provide techniques for determining floors at a geographic location using barometric air pressure sensors in a mobile phone. An exemplary method includes identifying a first height associated with a location based on a client device. The first height indicates an entry level of the client device at the location. Using information regarding an amount of outside air pressure at the location, a pressure sensor in the client device is calibrated. A pressure offset for the location is calculated. The pressure offset identifies a difference between air pressure readings inside the location and the amount of outside air pressure at the location. Using the calibrated pressure sensor, a second height associated with the location is determined based on readings from the calibrated pressure sensor and the pressure offset. The second height indicates a different level at the location that the client device is currently on.

Abstract: An angular acceleration detection device includes a rotating weight, a fixed portion, a support beam, and a detection portion. The rotating weight is rotatable about a Z-axis with respect to the fixed portion by action of an inertial force generated by an angular acceleration about the Z-axis. The fixed portion is disposed at a position spaced from the rotating weight. The support beam is disposed in an X-Y plane between the fixed portion and the rotating weight, the support beam elastically supporting the rotating weight with respect to the fixed portion. The detection portion outputs a detection signal corresponding to stress generated in the support beam. A gravity center position of the rotating weight is aligned with the support beam when viewed in a Z-axis direction.

Abstract: A temperature characteristic correction device corrects a temperature characteristic of an electronic device. The temperature characteristic correction device calculates a peak correction characteristic approximating a peak waveform having a peak value in a second range included in a first range of the temperature characteristic using a first formula, and a correction characteristic approximating a waveform continuing in the first range of the temperature characteristic using a second formula. The temperature characteristic correction device calculates a total correction amount from the peak correction characteristic and the correction characteristic, and then corrects the temperature characteristic using the total correction amount.