Abstract: The advanced control heat transfer loop apparatus (1) for heat transfer and thermal control applications uses a two-phase fluid as a working media and comprises at least one evaporator (2) to be connected with a heat source and comprising primary capillary pump (4), a thermal stabilization-compensation chamber (3) being attached to the at least one evaporator (2), at least one condenser (24) to be connected with a heat sink, liquid lines (22) and vapor lines (23) connecting the at least one evaporator (2) and the at least one condenser (24), a remote compensation chamber (20), temperature sensors (27) for detecting the temperature of the remote compensation chamber (20) and at the thermal stabilization compensation chamber (3) attached to the at least one evaporator (2),at least one heating element (19) for heating the remote compensation chamber (20), and a controller (28).

Abstract: A heat transfer fin (3) comprises a plate-like base section (4), a cylindrical collar section (5), a recessed section (7) which has a sloped surface (7a), and a flare section (6) which, when combined with another heat transfer fin (3), is in surface contact with the sloped surface (7a) of the another heat transfer fin (3). The sloped surface (7a) of the recessed section (7) and the root of the collar section (5) are connected, the connection portion where the sloped surface (7a) of the recessed section (7) and the collar section (5) are connected is bent at an acute angle, and the root of the collar section (5) reaches a position beyond a reference plane (S) which is in contact with a surface (4a) of the base section (4), the surface (4a) being located on the side opposite the flare section (6).

Abstract: An apparatus body heat dissipation device includes an apparatus case, at least one plate body and at least one drive member. The apparatus case has at least one first opening and at least one second opening and a receiving space. The plate body is disposed in the receiving space. The drive member serves to drive the plate body to move within the receiving space to produce air convection effect between the interior of the apparatus case and the ambience of the apparatus case so that the air convection in the limited space of the apparatus body can be effectively enhanced to greatly enhance the heat dissipation efficiency.

Abstract: The invention relates to a shell-and-tube apparatus comprising a housing (3) having a bundle (9) of tubes accommodated therein, where the tubes (15) are joined on one side to a first tube plate (11) and on the side opposite the first tube plate (11) to a second tube plate (13), with the first and second tube plates (11, 13) being fastened detachably in the housing (3). The side of the first tube plate (11) opposite the tubes (15) rests against a stop (31) on the housing (3) and is fixed on the stop (31) and the second tube plate (13) is installed with a sealing element (41) in the housing (3). The invention further relates to the use of the shell-and-tube apparatus.

Abstract: A self-cleaning fan assembly is provided that can be used to automatically clean the assembly's heat exchanger or air filter. In use, once the system determines that the heat exchanger/air filter should be cleaned, for example based on the total operational time or the number of use cycles for the system, or based on the air flow passing through the heat exchanger/air filter, the controller temporarily reverses the direction of the fan, thereby reversing the flow of air through the heat exchanger/air filter and forcing out dust, dirt and other debris.

Abstract: A shell loading system for a firearm in one embodiment includes a barrel, receiver, reciprocating slide and bolt assembly, tubular magazine, carrier operable to receive and feed shells from the magazine into the action, a spring-biased carrier latch laterally moveable to engage the carrier, and a pawl pivotably mounted on the carrier. A carrier latch disconnect is also pivotably mounted to the carrier and operated by the pawl. The carrier latch disconnect and pawl are movable independently of each other in one embodiment. The carrier latch disconnect is operable to block the carrier latch from engaging the carrier in a first position. In a second position when activated by the pawl, the carrier latch disconnect releases the carrier latch to engage the carrier which is locked in a downward position to receive a shell from the magazine.

Abstract: A rifle has a receiver, a cartridge chamber connected to the receiver, and a bolt slideable longitudinally in the receiver, the bolt is engageable with a cartridge in the chamber. A bolt carrier is slideable longitudinally in the receiver to move the bolt into and out of engagement with a cartridge in the cartridge chamber, and a bolt handle is connected to the bolt carrier. The bolt handle is positionable in a manual position extending from one side of the rifle to permit manual firing of the rifle and in a semiautomatic position about 180 degrees different from the manual position and extending from the other side of the rifle to permit semiautomatic firing of the rifle. The position of the bolt carrier may be changed between the manual and semiautomatic positions without removing the bolt carrier from the rifle.

Abstract: A firearm can have a bolt having a plurality of locking lugs that are configured to have a shear area that is larger than that of a standard M16/M4. A bolt carrier can have a bolt that has a double cut cam having an unlocking cam surface that has sufficient dwell increase to delay a start of unlocking when the bolt carrier is used in an M4 carbine. A stepped extractor pin may be provided that prevents disengagement of the extractor pin. A tube can be configured to provide gas from a barrel of the firearm to the piston via the carrier key. The tube can have a heat radiator formed from triangular shaped threads on at least a portion of the tube. A piston on the bolt and can have a plurality of rings including pairs of mating rings that are formed and maintained as a matched pair.

Abstract: A semi-automatic pistol has a frame having a trigger guard defining a trigger finger space, a barrel connected to the frame and defining a bore axis, a slide connected to the frame and operable to reciprocate along the bore axis between a forward battery position and a rearward open position, a recoil mechanism operably connected between the slide and the frame, and operable to bias the slide to the battery position, and the recoil mechanism being entirely below the barrel axis and forward of the trigger finger space. The recoil mechanism may be a recoil spring defining a spring axis. The spring axis may be parallel to the bore axis. The recoil spring may be a helical shape defining a bore receiving a guide rod. The guide rod may be below the barrel. The trigger guard may have a downwardly facing upper surface defining the trigger finger space.

Abstract: A firearm having a gas piston system includes a bolt carrier, an adjustable gas piston block located forward on the firearm and an over-the-barrel spring and guide rod arrangement, all of which is housed and contained in a top rail that runs the length of the firearm and that maintains the alignment of these firearm components. The firearm also includes an ambidextrous, non-reciprocating charging handle located forward on the firearm and positioned within the top rail for charging the firearm.

Abstract: A drop-in adjustable trigger assembly has a camming safety linkage to selectively move and engage a bolt sear to positively prevent movement of the bolt sear. The drop-in trigger assembly housing carries a pivoting bolt sear engagement member which is connected to a sear safety linkage. The housing has a sear safety linkage slot defined therein which guides the pivoting sear safety linkage in response to actuation of an upwardly projecting thumb safety lever's actuation. A trigger bracket preferably carries a removable, reversible trigger shoe and is configured to pivot within the housing about a pivot point within the housing, and the trigger bracket carries an adjustable rocker having (preferably) a first stage movement adjustment and a second stage length adjustment. The pivoting safety mechanism's safety linkage pivots rearwardly to push upon or cam the bolt sear upwardly, thus disengaging the bolt sear from the trigger sear.

Abstract: The present invention relates to devices and methods for introducing, in a firearm comprising a movement space arranged in a housing of the firearm and provided for a moveable component of the firearm or for a fluid moveable within the firearm, a filling material, which, at least in part, fills the movement space and preferably solidifies therein, into the movement space, when there is a condition in which the firearm is to be disabled.

Abstract: A remote trigger actuator, including a driver, a shaft coupled to the driver, the shaft including a central axis, a proximal end, and a distal end opposite the proximal end, and a cam coupled to the shaft proximate the distal end, the cam including a first end and a second end opposite the first end. Wherein rotation of the shaft about the axis causes the second end of the cam to engage a trigger of the firearm thereby discharging the firearm. The trigger actuator is configured to be mounted to the firearm.

Abstract: Methods, computer-readable media, and systems are disclosed for controlling a turret assembly with two or more gimbaled, swivel assembly sub-systems, such as a gimbaled gun and a gimbaled electro-optical sensor. The turret can be automatically slewed in response to one of the swivel assemblies rotating. A user can switch turret modes reflecting a priority between the gimbaled sub-systems system so that one takes priority over the other(s) during a mission.

Abstract: In one embodiment, a compact slingbow/quiver combination includes first and second arms joined by a generally central cross piece. Slingbow arms form first and second elongate storage chambers which are used to create a shared elongate storage chamber within the slingbow. The shared elongate storage chamber may be used for storing items such as arrows. Other embodiments are also disclosed.

Abstract: A receiver of an automatic air rifle includes a front sliding sleeve including upper and lower recesses; a main biasing member secured to the front sliding sleeve and the charging handle respectively; a roller; an L-shaped rod; a rear diversion channel through the front sliding sleeve; a rear sliding sleeve including pivotal upper and lower hooks; a main tube through the rear sliding sleeve and including a rear inlet and an annular flange proximate the rear inlet; a gas piston disposed forwardly of the main tube; an inlet member at a rear end of the gas piston; and an auxiliary biasing member put on the main tube and biased between the front sliding sleeve and the rear sliding sleeve. The air rifle is capable of firing in semi-automatic or fully automatic position.

Abstract: Improvements in an airsoft kit to convert an airsoft gun to fire paintballs is disclosed. The airsoft kit to convert an airsoft gun to fire paintballs to fire paintballs. The firing of paintballs can be with firing individual paintballs, a burst of about three paintballs successive paintballs rapid fire as paintballs are sprayed in a general area of an opponent. The kit converts an airsoft gun to fire paintballs to handle feeding either airsoft projectiles or paintball projectiles depending upon the installed kit. The kit allows for a user to purchase a single reliable gun that can be used for either activity and then install or remove a fit that allows the gun to be used in either of the two activities. The conversion requires little or no tools and can be performed in the field as the user prepares for their next combat.

Abstract: A defensive stick and relayed system and method of use system, comprising: a defensive stick comprising at least one and no more than two strike ends thereof; a user grip tightly affixed and substantially immobile relative to the strike ends; a carriage housing removably mating with the first one of the strike ends; and a connector connecting the carriage housing to a carriage point selected from the group consisting of: a place on the user's body, a fixed place near the user, and a material object carried by the user; wherein: when, in response to a perceived threat, the user applies a separation force at least one and no more than ten pounds, the defensive stick separates from the carriage housing, has its first strike end exposed, and thereby deploys for immediate defensive use with a single separation hand motion.

Abstract: A gun assembly comprising a cylindrical gun action mated within a generally semi-cylindrical cavity of a synthetic gunstock to thereby define a specialized interference fit between the gunstock and the gun action is disclosed herein. The innovative gun assembly comprises at least three zones of interference fit established by assembling together a synthetic gunstock that includes a specialized receiving cavity generally in the form of a semi-cylinder and defined by a first radius R1 (correspond to zone surfaces) and a second radius R2 (corresponds to relief surfaces); and a metallic gun action generally in the form of a cylinder defined by a third radius R3. In order to achieve the specialized interference fit, the length of the third radius is selected to be slightly greater than the length of the first radius.

Abstract: A method of aligning a point of aim with a point of impact for a projectile device is disclosed. Using a superposition device coupled to the projectile device, at least three reference points are superposed within a first target area with at least three diverging beams of the superposition device. Positions for at least three of the reference points are noted. A projectile is shot from the projectile device at a second target area, while the positions of the at least three reference points are maintained, to create the point of impact. The point of aim for the projectile device is adjusted to correspond with the point of impact while the positions of the at least three reference points are maintained. A system for aligning a point of aim with a point of impact for a projectile device is also disclosed.

Abstract: A method of aligning a point of aim with a point of impact for a projectile device is disclosed. Using at least one superposition device coupled to the projectile device, multiple optical reference points are superposed within a first target area. Positions for at least two of the optical reference points are noted. A projectile is shot from the projectile device at a second target area, while the positions of the at least two optical reference points are maintained, to create the point of impact. The point of aim for the projectile device is adjusted to correspond with the point of impact while the positions of the at least two optical reference points are maintained. A system for aligning a point of aim with a point of impact for a projectile device is also disclosed.

Abstract: An accessory for coupling to a conventional rifle scope captures sight images through the scope and transmits them through wi-fi to a remote location. The telescopic sight eyepiece is fitted into the front of a tubular portion of the accessory. An adjustable collet nut threadably and coaxially engages the scope eyelet. The scope image is transmitted through the housing from the front to a rear eyepiece through which the user can view images. The image passes through an optical splitter that directs duplicate images to an adjustable camera mounted on a slidable carriage disposed within the housing. A rack and pinion driven by a thumb wheel accessible from the housing exterior displaces the carriage for focusing. Processed camera images are delivered to a wi-fi circuit to transmit images to a remote Smart-phone, equipped with a suitable software program (i.e., an “app”) for decoding the images and recording snapshots and movies.

Abstract: A sight includes a first housing having a line of sight and accommodating an optical and laser receiving module, visible light reflected from a target to enter into the optical and laser receiving module so as to observe the target; a second housing combined with an outer surface of the first housing and accommodating a laser transmitting module emitting a laser beam which is reflected by the target and received by the optical and laser receiving module, whereby a distance of the target is calculated by the sight; an elevation-and-windage-adjustment module mounted on the outer surface of the first housing and disposed under the first housing to adjust the first housing to move so that a sight direction of the line of sight moves; and a power supply, the power supply provides power for the optical and laser receiving module and the laser transmitting module.

Abstract: Embodiments include active protection systems and methods for an aerial platform. An onboard system includes radar modules, detects aerial vehicles within a threat range of the aerial platform, and determines if any of the aerial vehicles are an aerial threat. The onboard system also determines an intercept vector to the aerial threat, communicates the intercept vector to an eject vehicle, and causes the eject vehicle to be ejected from the aerial platform to intercept the aerial threat. The eject vehicle includes alignment thrusters to rotate a longitudinal axis of the eject vehicle to substantially align with the intercept vector, a rocket motor to accelerate the eject vehicle along an intercept vector, divert thrusters to divert the eject vehicle in a direction substantially perpendicular to the intercept vector, and attitude control thrusters to make adjustments to the attitude of the eject vehicle.

Abstract: According to the invention, before firing said projectile (M) from the carrier (L), the mean biases of the accelerometers and of the gyrometers of the inertial unit (IM) of said craft are determined using the inertial unit (IL) of said carrier (L) and, during the inertial navigation of said craft (M), the measurements of the accelerometers and of the gyrometers output by said inertial unit (IM) of said craft (M) are corrected by said mean biases determined before launching.

Abstract: A vessel-based armor system is disclosed that comprises an outer vessel element and a ballistic protection element enclosed within. The vessel itself does not provide protection from ballistic threats; rather, the protective element within the vessel mitigates the ballistic threat. The vessel provides housing for the internal protective element. The design of the vessel permits the insertion and removal of the protective element and the replacement with a different protective element. In the primary embodiment, the protective element is an armored insert comprising at least one ballistic resistant plate (or panel). A preferred embodiment of the armored insert comprises a series of offset panels or plates thereby forming a spaced armor arrangement within the vessel. The same vessel is capable of accepting fill material, strata of fill material and armor interstitial plates, or a liquid, thereby increasing the flexibility of use, range of cost, weight, and setup time in the deployment of the armor system.

Abstract: The present invention is directed to new and improved armor protection that can replace the existing crew cabin with a field replaceable armored crew compartment to be attached to the existing body of an HMMWV military vehicle to protect the military personnel within from explosive blasts, roll-over or collisions. In accordance with the concepts of the present invention, in order to provide additional protection to personnel in the HMMWV crew compartment, a sacrificial V-shaped hull is designed to be attached onto the underside of the crew compartment over the HMMWV frame rails. In the event of an explosion underneath the HMMWV, the V-shaped hull will shield the personnel inside the cabin and absorb the force of the explosion.

Abstract: A blast attenuating seat system for protecting a vehicle occupant from impulses generated by blasts from underneath the vehicle, and methods for manufacturing and using same. The blast attenuating seat system includes a post, a mounting body coupled to a portion of the post and a seat assembly movably coupled to the mounting body configured to move relative to the post and mounting body. The seat assembly includes a seat body having a seat support structure configured to support a plurality of seat cushions and a shock assembly coupling the seat body and mounting body and configured to compress and expand such that the seat assembly moves relative to the post and mounting body. The blast attenuating seat system thereby provides/enables improved protection for vehicle occupants that may be exposed to explosive blasts.

Abstract: A method for operating a ground-based anti-aircraft system includes providing a group of main system components containing a sensor system, a tactical operation control and an effector system. Combat target sensor data are passed from the sensor system to the tactical operation control, processed therein and passed in processed form from the tactical operation control to the effector system, using the data to combat the target. A central integration module having a converter unit and a central data distributor allows differently constructed main system components to be connected. Data from all main system components are routed to the central data distributor by the converter unit and converted therein from component protocol into system-internal data protocol, and passed from the central data distributor to one or more main system components, through the converter unit, converting the distributed data back from system-internal data protocol into component protocol.

Abstract: A terrain disruption device includes an air or gas flow generation device mounted on a remote operated vehicle having an extendible arm, wherein the air or gas flow generation device includes an elongate (optionally detachable) ducting arrangement to direct the air or gas flow and an optional nozzle. The air or gas flow generation device and/or the elongate ducting arrangement may be mounted on the extendible arm. Preferably, the air or gas flow generation device is powered by a fan, more preferably an electric ducted fan.

Abstract: A system under international control is in possession of the firing codes required to launch missiles owned by the parties to the system. Upon a request to the international authority for the release of its firing codes so that it may launch a first strike, the target party is advised of the request and given the opportunity to launch its own missiles first. The system deters first strikes.

Abstract: An inflatable dummy target fittable into a carrier missile capable of being released from the carrier missile during exo-atmospheric flight; upon release, the dummy target or portion thereof is capable of being inflated and manifest characteristics that resemble GTG missile characteristics, wherein the GTG missile characteristics include IR signature, RF signature and GTG missile

Abstract: A broadhead arrowhead has blades that deploy when the arrowhead penetrates a target. The blades extend after the arrowhead has penetrated the target a sufficient distance for a lead edge of the blade to contact the wound made in the target. Before and during flight the extendable blades are held in a retracted position by frictional engagement with a retaining element that remains attached to the arrowhead. The configuration of the extendable blades provides a stable profile when the arrowhead is in flight.

Abstract: Various embodiments of projectiles and materials based impact reactive projectiles are described. In one embodiment, a projectile includes a projectile core and a tip. The projectile core may include a core base and a central recess that extends from a leading circumferential rim of the projectile core to the core base. The projectile core may further include projectile fingers each separated by a kerf, extending longitudinally from the core base to the leading circumferential rim, and extending radially apart between an outer periphery of the central recess to an outer periphery surface of the core. Depending at least in part upon the type of materials which the projectile is formed from, upon impact, the projectile fingers and core base of the projectile may fracture apart without a slug remaining. Alternatively, the projectile fingers may bloom out, expanding the cross sectional area of the projectile, and slowing the projectile.

Abstract: A weapon system including a weapon, and methods of manufacturing and operating the same. In one embodiment, the weapon includes a guidance section in a front section of the weapon, and a signal cartridge assembly behind the front section and including a signal cartridge configured to provide a signal indicating a location of impact for the weapon.

Abstract: Disclosed is a claymore mine on which a device for preventing a breakdown attributable to a power noise has been mounted. In order to prevent an electric primer from operating due to a power noise induced by a magnetic field or generated by the falling of a thunderbolt or other factors, such as a communication device, a shield layer formed by weaving or braiding a conductive fiber, such as a carbon fiber, or weaving or braiding a copper-plated tin wire, is formed in the wire and percussion unit of the claymore mine. In order to discharge a power noise introduced into the wire and the percussion unit to the earth, a power noise discharge adaptor including a plurality of diodes, a TVS, a GDT, and an SPD is formed. Accordingly, the introduction of a power noise can be fundamentally blocked, and a power noise can be safely discharged to the earth if the power noise is introduced.

Abstract: A fragmentation structure is provided with improved performance e.g., fragmentation, projectile generation, storage, and manufacturing. An embodiment can include an open fragmentation structure that can be separated into individual components that can include a structure body section with a compartment, a removable initiator or detonator, a top cap section having an aperture configured to accept the removable initiator or removable detonator, and an explosive. An exemplary explosive can be preassembled to fit within the structure without a need for pouring in an explosive. An exemplary structure or top cap of the structure can receive an embrittlement treatment increasing its fragmentation characteristics. An ability of the structure to be easily disassembled allows for safer storage and a longer shelf life. A design of an exemplary embodiment of the structure allows it to be used with a wide range of explosive materials in addition to many types of removable initiators or detonators.

Abstract: The present invention relates to the field of measurement technology, and provides a ruler which can solve the problem that the existing ruler has few kinds of scales and monotonous display content. The ruler of the present invention comprises a strip-like body for performing measurement, the strip-like body is a display screen, and the ruler further comprises a circuit unit, which is connected to the display screen and is used for driving the display screen to display. The ruler provided by the present invention can display rich measurement information when measuring an object.

Abstract: An interference system, comprising: an interference apparatus, configured such that input light pulses interfere at an interference component; wherein the input of said interference apparatus is provided by a phase-randomised light source, said phase-randomised light source comprising: at least one slave light source; at least one master light source configured to intermittently generate master light pulses such that the phase of each master light pulse has a random relationship to the phase of each subsequently generated master light pulse, further configured to supply said master light pulses to the slave light source; and a controller, configured to apply a time varying drive signal to said at least one slave light source such that just one slave light pulse is generated during each period of time for which a master light pulse is received, such that the phase of each slave light pulse has a random relationship to the phase of each subsequently generated slave light pulse.

Abstract: An optical coherent tomographic imaging system includes means for introducing a 180-degree phase inversion in the interference fringes, and generating a two-peak shape point spread function (PSF) in the frequency domain for the interference-based tomographic imaging system. The system further includes means for achieving sharper resolution than the diffraction-limited spectral bandwidth in the tomographic imaging system through subtracting the two-peak shape from the original Gaussian PSF. Means are provided for removing the ghost fringes in the tomographic imaging system, which is introduced by the self-interference between the different layers of the sample arm. The apparatus is configured to realize the real-time super-resolution swept-source optical coherent tomography (OCT) such that the sensitivity of the system is enhanced by suppressing the noise floor in the frequency domain, as well as removing the ghost fringes.

Abstract: Calibrating a scanning interferometry imaging system includes: configuring the scanning interferometry imaging system for operation with an interference objective using light having a narrowband wavelength spectrum; using the scanning interferometry imaging system to direct measurement light and reference light along different paths and to overlap the measurement and reference light on a detector, the measurement and reference light having the narrowband wavelength spectrum; scanning an optical path length difference between the measurement light and the reference light at the detector while acquiring intensity data using the detector, the detector acquiring the intensity data at a frame rate and the scanning being performed at a scan speed; determining information about the scan speed based on the acquired intensity data, geometric information about the scanning interferometry imaging system, and the narrowband wavelength spectrum; and calibrating the scanning interferometry imaging system based on the infor

Abstract: A system for use with a vehicle comprising a tractor and a trailer includes one or more image capture devices. The one or more image capture devices capture images of the interior of a trailer and/or cargo items of the trailer. An image processor estimates available cargo space within the trailer based on the captured images.

Abstract: The invention relates to a method for monitoring the safety of a joint (12) of a serial kinematic structure (30), which carries out tasks within a work region (100) under the control of a control unit (20), wherein a current state variable of the joint (12), such as the absolute position (AP) or the time derivatives thereof, is determined cyclically during operation from the current axis position (P) of the joint (12) and compared to a configurable limit value (SA, TA, SL), wherein a function module (3, 4, 5) is used to monitor the state variable. A function module (3, 4, 5) is assigned to each state variable to be monitored. These function modules (3, 4, 5) are designed independently of the control unit (20) of the serial kinematic structure (30), whereby the safety monitoring system (10) can be operated concurrently with and independently of the control unit (20) of the serial kinematic structure (30).

Abstract: A method of providing pressure information from a mobile device includes: measuring a barometric pressure at the mobile device; determining a present barometric pressure based on the measured barometric pressure; and sending, from the mobile device toward a server, the present barometric pressure. The server may determine an altitude for the mobile device based on the present barometric pressure and a known reference pressure for a known altitude. The method may further include providing pressure statistics and/or calibration points by the mobile device to the server where the calibration points include pressure measurements for known or determinable locations. The calibration points may enable the server to determine a calibration value to enable an adjustment or correction to the measured barometric pressure.

Abstract: A method of determining, at a server, an altitude of a mobile device, includes: receiving, at the server from the mobile device, a present barometric pressure at the mobile device; and determining, at the server, an altitude of the mobile device based on the present barometric pressure and a present reference barometric pressure at a known altitude.

Abstract: A speed square includes a right isosceles triangle shaped speed square with three sides. The three sides comprise a pitch edge, a hypotenuse, and another side. The speed square also has a closed and arced angular measurement tube extending along a portion of a circumferential arc between the non-hypotenuse sides and the tube contains a fluid and a bubble that moved through the fluid. The speed square also has a measurement scale. When the pitch edge is aligned against a slope to be measured, the bubble rises to the highest point in the tube, and the bubble is aligned on the measurement scale at a point along the measurement scale corresponding to the slope being measured.

Abstract: This disclosure relates to a system configured to display current surf information to a user on a device worn by the user, track physical surfing activity of the user across multiple surf sessions, and/or alert the user when current surf conditions match previously highly rated surf conditions and/or any user selected criteria based on surf/weather forecast data. The system may comprise a first device (a watch) worn by the user, a second device (the user's smartphone) associated with the user but physically separate and unconnected from the first device, external resources, and/or other components.

Abstract: An angular velocity sensor is provided, the angular velocity sensor comprising: a housing an outer edge shape of which is a polygon in a planar view; a planar substrate fixed to the housing; a vibrating weight that is surrounded by the housing and is formed to extend in a perpendicular direction in relation to the planar substrate on the planar substrate; and a vibrating unit to vibrate the vibrating weight in a predetermined direction, wherein the vibrating unit vibrates the vibrating weight in a different direction from a direction of a straight line that connects the shortest distance between the outer edge of the housing and the center of gravity of the vibrating weight in a planar view.

Abstract: A method for fabricating an environmentally robust micro-wineglass gyroscope includes the steps of stacking and bonding of at least an inner glass layer and an outer glass layer to a substrate wafer; plastically deforming the inner glass layer into a mushroom-shaped structure and deforming the outer glass layer into a shield capable of extending over the inner glass layer, while leaving the inner and outer glass layers connectable at a central post location; removing the substrate layer and a portion of the inner glass layer so that a perimeter of the inner glass layer is free; and bonding the deformed inner and outer glass layers to a handle wafer. The resulting structure is an environmentally robust micro-wineglass gyroscope which has a double ended supported central post location for the mushroom-shaped structure of the inner glass layer.

Abstract: A micromechanical rotation rate sensor includes: a substrate having a main plane of extension; a first Coriolis element; a second Coriolis element; a drive device for deflecting the first and second Coriolis elements from a neutral position; and a detection device. The first Coriolis element, with regard to a first axis extending in parallel to the main plane of extension, has a mass-symmetrical design with respect to the second Coriolis element. The first and second Coriolis elements have a common main plane of extension, and in the neutral position the shared main plane of extension extends in parallel to the main plane of extension of the substrate. The first and second Coriolis elements each have a mass-symmetrical design with respect to a second axis extending perpendicularly with respect to the first axis. The first and second Coriolis elements are drivable by the drive device.