Abstract: Provided are a treatment apparatus using proton and ultrasound and a method for treating cancer using the same. The treatment apparatus includes a proton generator configured to emit a proton beam to a tumor of a human body, an ultrasound generator configured to emit an ultrasonic beam to the tumor in a direction crossing an emission path of the proton beam, and a sensor configured to measure an acoustic signal generated during the emission of the proton beam.

Abstract: An optimization method for a radiotherapy plan using robust optimization to handle different scenarios that may occur during one treatment session because of patient movement. The optimization is based on the period and amplitude of the movement, the starting point of the treatment session within a period and the delivery time structure.

Abstract: A particle beam therapy apparatus includes: a particle beam irradiator outputting a particle beam; a movable supporting structure supporting the particle beam irradiator; movable plates disposed on a displacement trajectory of the particle beam irradiator, forming a substantially horizontal enveloping surface below a table for placing an irradiation object, and including first and second floor members in at least one of the movable plates, the second floor member being larger in X-ray transmittance than the first floor member; an X-ray generator provided in a non-collision area where the X-ray generator does not collide with any of the particle beam irradiator, the supporting structure, and the movable plates; and an X-ray detector installed at a position where the X-ray detector faces the X-ray generator.

Abstract: A method of sequential monoscopic tracking is described. The method includes generating a plurality of projections of an internal target region within a body of a patient, the plurality of projections comprising projection data about a position of an internal target region of the patient. The method further includes generating external positional data about external motion of the body of the patient using one or more external sensors. The method further includes generating, by a processing device, a correlation model between the projection data and the external positional data by fitting the plurality of projections of the internal target region to the external positional data. The method further includes estimating the position of the internal target region at a later time using the correlation model.

Abstract: Aspects of the present disclosure involve systems, devices, and methods for detecting and treating skin conditions such as skin cancers; more particularly it relates to detection of skin cancers and superficial radiotherapy treatment thereof. The system uses Augmented Reality (“AR”) display systems that help visualize radiation patterns and overall tumor shape/size at least when setting up for radiotherapy treatment.

Abstract: An assembly for preventing an overdose of a charged particle beam during therapy to a patient includes a pixelated detector apparatus and a controller. The controller includes, for each pixel: a current integrator circuit that converts the local measured current into a total local detected charge integrated from a start time, the integrator circuit outputting an integrator voltage that corresponds to the total local detected charge; and a discriminator circuit that compares the integrator voltage with a reference voltage, the reference voltage corresponding to a maximum acceptable dose for the patient. A logic circuit generates an overdose fault signal if, at any of the pixels, the integrator voltage is higher than the reference voltage.

Abstract: The disclosed systems and methods for Image-Guided Radiation Therapy (IGRT), utilises an iterative approach which adjusts a treatment plan based on inter- or intra-fraction images to improve the accuracy of the radiation delivered during the overall treatment. The prescribed dose of radiotherapeutic radiation is mapped onto the patient's anatomy using an image acquired of the region, which is to be the target for radiotherapeutic radiation. Following beam-angle-optimisation, fluence optimisation and segmentation, the efficiency of delivery of each segment is determined using an objective function, and the segments ranked according to their efficiency. The plan proceeds with the choice of the most efficient segment (or segments) to be delivered first.

Abstract: A treatment instrument includes: a proximal side probe transmits ultrasonic vibration from its proximal end to its distal end; a distal side probe configured to transmit the ultrasonic vibration from its proximal end to a treatment portion at its distal end; and a holding portion which holds a state where the proximal end of the distal side probe is into collision with the distal end of the proximal side probe, and a state where vibration is transmittable from the proximal end of the proximal side probe to the distal end of the distal side probe.

Abstract: A fall protection device includes a frame, a rotation unit, a safety belt, and a braking unit. The rotation unit is rotatably disposed in the frame; the safety belt is wound up on the rotation unit, and adapted to be pulled to drive a rotation of the rotation unit. The braking unit includes a braking plate, a braking block, and a stopper. The braking plate is connected to the rotation unit, rotates with the rotation unit coaxially. The braking block is pivotally connected to the braking plate, and includes a stopping part. The stopping part of the braking block can be spun out by a centrifugal force produced by a rotation of the braking plate, and abuts against the stopper to limit the rotation of the rotation unit. The braking block includes an abutted part. The stopper is disposed in a movement path of the abutted part.

Abstract: A face mask comprises a mask body having apertures; an exhalation valve positioned within one of the apertures of the mask body; a harness assembly configured to extend about the wearer's head wherein the harness assembly; a first strap attached to the harness assembly, a strap retainer positioned on the mask body and disposed over the exhalation valve, the strap retainer configured to receive the first strap; and a valve protector. The first strap has front and rear surfaces, the front and rear surfaces defining a second thickness therebetween. The valve protector is positioned between the first strap and the exhalation valve and has a first surface configured to engage the exhalation valve and a second surface, opposite the first surface. The first and second surfaces define a first thickness therebetween such that a spacing between the first strap and the strap retainer controls the friction between the first strap and the front surface of the strap retainer.

Abstract: Assembly intended to be arranged in an aircraft cockpit having a pressurized cabin, in order to supply a breathing gas to a crew member, said assembly comprising a respiratory mask having an oronasal face cover and a harness, the oronasal face cover having a respiratory cavity and being suitable for applying on the face of the crew member around the mouth and nose, the harness forming a loop adapted to be extended around the head of the user on a side opposite from the oronasal face cover so as to hold the oronasal face cover on the face of the user, and a storage device, said storage device comprising a base and a platform, the platform being mounted so as to be movable relative to the base between a retracted position and an extended position, the platform having a receiving surface, the receiving surface of the platform being adapted to receive the respiratory mask in a storage position where the harness holds the oronasal face cover against the receiving surface of the platform by encircling the platform

Abstract: A water survival mask that seals to the user's face covering the nose and mouth and preventing the unwanted inhalation of water. The mask lets air in through slots located at the bottom of the mask that also allow water to drain out. Once through the slots, water is prevented from entering the mask by a water impermeable barrier that selectively allows for air and not water to be inhaled, which may be a float valve. If water penetrates through the water impermeable barrier it is caught by splash guards and funneled back out of the mask before it can enter the primary airway of the user. The water survival mask works exceptionally well at preventing inhalation of windblown water droplets or wave water when floating in rough waters, thereby preventing pulmonary aspiration and pulmonary edema. It also prevents immediate inhalation of water do to submersion in cold water.

Abstract: Disclosed is a modular serviceable cartridge assembly for a respirator exhalation unit that is simple in construction and that allows quick-connect of an exhalation valve cartridge in a mask to minimize the need for reconfiguration when changing personal protective equipment, and that allows for easy removal and breakdown for servicing and/or replacement of individual components of the exhalation valve without modifying or replacing other elements of the protective mask. The assembly may be convertible from a negative pressure valve assembly to a positive pressure valve assembly, and vice versa, and a grill may be provided on an outlet side of the cartridge assembly, the rotation of which converts the assembly from a negative pressure valve to a positive pressure valve.

Abstract: A system for monitoring the bed health of a molecular sieve bed within a pressure swing adsorption (PSA) system includes an oxygen sensor coupled to an outlet of the PSA system. The oxygen sensor measures an oxygen concentration of an output air produced by the molecular sieve bed. A controller is in communication with the oxygen sensor and records a series of oxygen concentrations over time. The controller is configured to determine bed health based upon the series of recorded oxygen concentrations.

Abstract: This invention relates to a fireproofing article and the method of manufacturing the same. The fireproofing article comprises an external portion and an inner portion. The external portion defines external surfaces of the fireproofing article that are exposed to the environment. The inner portion is formed inside of the external portion. The external portion and the inner portion are both porous and made of a fireproofing material. The external portion has a first material density and the inner portion has a second material density. The first material density is less than the second material density. The method of manufacturing a fireproofing article comprises forming the fireproofing article with a fireproofing material through 3D printing; wherein the fireproofing article formed is porous.

Abstract: Fire block devices for application to a wall component. The fire-block device can be a wall component that includes a fire-resistant material strip that expands in response to sufficient heat to create a fire-resistant barrier. In some applications, the fire-block wall component is positioned to extend lengthwise along and across a gap between wallboard members. The fire-block wall component may have a U-shaped central portion and a pair of side portions extending in opposite directions from the central portion. The fire-resistant material may be positioned on the central portion of the fire-block device. The central portion may be positioned within the gap such that the fire-resistant material expands in response to sufficient heat to create a fire-resistant barrier.

Abstract: An apparatus is disclosed for extinguishing a stovetop fire over a stovetop having a first burner, the apparatus including a container detachably mountable to a microwave positioned above the stove top. A supply of fire suppressant material is retained within the container. A heat responsive actuator is disposed on the container. When the container is mounted to the microwave over the first burner, and the fire actuates the heat responsive actuator, at least a portion of the supply of fire suppressant material falls from the container toward the first burner.

Abstract: A system and a controlling method for extinguishing a fire in a battery of a vehicle is provided for preventing the vehicle from being completely burned out and protecting consumer's physical assets by injecting cooling water of a water cooling system when a fire occurs in a battery to extinguish the fire of the battery at an early stage and by supplying an external cooling material from outside of the vehicle to extinguish the fire of the battery when the fire of the battery is not extinguished at the early stage.

Abstract: A temperature-sensing and automatic on and off extinguishing device includes: a valve body (1), a sealing auxiliary member (2), a sealing pad (3), a magnetic ring (4), a lower magnetic ring sleeve (5), an upper magnetic ring sleeve(6), a first temperature-sensing element (7), a bi-directional spacer (8), a large reset spring (9), a valve cover (17), a second temperature-sensing element (13), an actuating sleeve (12), a small reset spring (14), a connecting element (10), a sealing sleeve (18), a screw (11), a magnetic core rod (21) and a sealing cap (22). When a fire occurs, the first temperature-sensing element (7), affected by the rise of the surrounding environmental temperature, pushes the bi-directional spacer (8) to move upward.

Abstract: A sprinkler head for use in a structure for the delivery of a liquid includes a housing, a sleeve, a cap, a spray assembly, a return spring and an SMA spring. The sleeve includes a first portion which is positioned in the housing. The cap is threadedly assembled with the housing. The spray assembly is assembled to a second portion of the sleeve. The return spring is positioned between the cap and the first portion. The SMA spring is positioned between the cap and the spray assembly. The sleeve is movable relative to the housing in order to open a liquid flow path due to activation of the SMA spring resulting from an elevated temperature.

Abstract: A fire apparatus includes an engine, a water tank configured to store water, an agent tank configured to store a fire suppressing agent, a fuel tank configured to store a fuel used to power the engine, and a processing circuit. The processing circuit is configured to monitor the fluid level data indicating at least one of a water level within the water tank, a fire suppressing agent level within the agent tank, and a fuel level within the fuel tank; monitor fault data indicating any active faults of the fire apparatus; monitor maintenance data indicating whether maintenance is due; monitor exercise data indicating an elapsed time since the fire apparatus was last exercised; determine a readiness score based on the fluid level data, fault data, maintenance data, and exercise data; and at least one of transmit the readiness score to (i) a display device and (ii) a remote server.

Abstract: A trampoline comprising a trampoline frame having legs. The trampoline frame has a trampoline frame horizontal portion. A trampoline bed is suspended across the trampoline frame horizontal portion. Springs extend between the trampoline frame and trampoline bed. An enclosure is connected to the trampoline frame. The enclosure has an enclosure upper support. The enclosure supports an enclosure net. A pad system covers the springs. The pad system includes a wall pad extending upwardly from the springs and terminating at a pad system apex. The pad system further includes a buttress pad connected to the pad system apex at an apex angle from the wall pad, which is defined as an angle between a wall pad outside surface and the buttress pad. The buttress pad extends downwardly to cover at least partially the trampoline frame horizontal portion.

Abstract: The present invention relates to an exercise assistance device for assisting muscle exercise by means of a motor driven by means of electronic control.

Abstract: An exercise platform having a base member being a firm, resilient structure having in some aspects an edge member or a surrounding frame. The shape of the base member varies on design considerations, one shape being a generally planar, pear shape, another rectangular with side extensions. The base member is or has positioned thereon a cushioned top member, such as a foam or soft yoga mat type cushion. In an embodiment, the base member has around its periphery a pattern of anchor points or apertures to which resistance bands are attached, coupled or threaded. The use of resistance bands accessible around the periphery enable the user to utilize positions that enhance comfort, prevent injury, and maximize the benefit to each muscle group.

Abstract: A retractable wall mounted exercise rack system for providing an exercise rack that may be easily and compactly stored when not in use. The retractable wall mounted exercise rack system generally includes one or more brackets attached to a wall, a pair of support members, and a plurality of arms pivotally extending from the brackets and pivotally connecting to the support members. One or more actuators are connected between the brackets and the arms to assist in lifting the structure into a compact retracted position for storage.

Abstract: A rotary exercise system in one embodiment includes a chassis configured for mounting to stationary support members, a rotational support shaft rotatably coupled to chassis, and handle bar assembly coupled to the support shaft and manually rotatable therewith by a user. A variable resistance mechanism applies a user-adjustable rotational resistance force on the support shaft, which changes the force required to be applied by the user to rotate the handle bar assembly during an exercise routine. In some embodiments, the resistance mechanism may be a frictional resistance mechanism, such as a drum or disc brake assembly. A user-operated control actuator allows the user to readily change resistance settings to increase or decrease the rotational resistance imparted to the support shaft by the resistance mechanism. In some implementations, the chassis may be detachably mounted on vertical supports of a power rack and adjustable in height for performing different exercise routines.

Abstract: A muscle training system according to the present invention includes a belt that is provided with a gas bag and configured to apply a pressurizing force based on an amount of a gas in the gas bag to a specific portion of four limbs of a user in a state of being wound around the specific portion, a control device that receives a control command transmitted from the outside and is configured to control the pressurizing force to be applied by the belt to the specific portion by controlling a supply amount and a discharge amount of the gas to the gas bag of the belt based on the control command, and a portable information terminal device that is configured to transmit the control command to the control device by wireless communication in a case of operating in a predetermined aspect.

Abstract: An exercise apparatus comprising a weight stack, a flexible elongated cable having a downstream portion that is interconnected to a user selectable number of the one or more individual bodies of weight and to a second resistance device, a manually movable actuating device interconnected to a proximal end of the cable, a downstream portion of the cable being interconnected to the one or more individual bodies of weight and to the second resistance device in an arrangement that pulls on both the one or more individual bodies of weight and the second resistance device.

Abstract: An adjustable exercise suspension system and related methods of use and exercise are disclosed. The system includes a length-adjustable suspension strap assembly attached at one end to a fixed overhead support structure and at an opposite end to a weight element. The strap assembly comprises a plurality of straps detachably connected together. The weight element is suspended from the overhead support structure creating a tensile force in the strap assembly establishing a taut condition. The weight element is manually movable by a user during the exercise routine along an arcuate path in a plane of stable motion while the tensile force maintains the taut condition of the strap assembly. The strap assembly advantageously provides guided and stabilized motion of the weight element for the user thereby minimizing risk of injury. The resistance force of the system is user-variable by attaching different size weight elements to the strap assembly.

Abstract: A leg stretching and raising workout apparatus includes: a load bearing unit having a base for underpinning a shoe or foot, cord penetrating openings disposed at the base, and an anchoring portion; at least one fastening unit each having a cord fastened to a corresponding one of the cord penetrating openings of the load bearing unit, thereby enabling the cord to be fastened to the shoe or foot; and a pulling cord member having a pulling cord and a cord connecting portion connected to the anchoring portion of the load bearing unit.

Abstract: A leg stretching and raising workout apparatus include: a load bearing unit having a base for underpinning a shoe/foot and cord-penetrating openings disposed at the base; at least one fastening unit having a cord connected to the cord-penetrating openings to fasten the shoe or foot, and two anchoring portions disposed bilaterally; and two pulling cord members each having a pulling cord, and a cord connecting portion connected to a corresponding one of the anchoring portions. Another leg stretching and raising workout apparatus includes: a load bearing unit having a base for underpinning a shoe/foot, cord-penetrating openings disposed at the base, and two anchoring portions disposed bilaterally; at least one fastening unit having a cord connected to the cord-penetrating openings to fasten the shoe or foot; and two pulling cord members each having a pulling cord and a cord connecting portion connected to a corresponding one of the anchoring portions.

Abstract: The disclosed stretch exercise system includes a waist harness, an upper limb extension unit having a right and a left upper limb elastic straps which are set symmetrically on the waist harness and has a wrist loop, a lower limb extension unit having a right and a left lower limb elastic strap units which are set symmetrically on the waist harness, two Achilles tendon retro-stretch angle units connecting with the right and the left lower limb elastic strap units respectively and two sole fastening units set thereon respectively to hold the feet of a user. When the disclosed system is operated, the static balance is reached with the force applied on the upper limb extension unit and the force applied on the Achilles tendon retro-stretch angle units by the user.

Abstract: The present invention is a variable grip triceps push down exercise attachment comprising a curved bar to be grabbed by a user and a curved neck-bar, which is rigidly attached to the center point of the curved bar on its upper angled portion from one end and extending upward to attach to a variable resistance system. The curved neck portion has a gentle arcing shape which re-directs the resistance such that the line of force applied by the user is guided towards the user's center of gravity. Therefore, the user does not have to be directly below the cable or in any way directly in the force vector pattern of force of the attachment and the resistance attached.

Abstract: An exercise apparatus with divergent/convergent motion along the symmetric semi elliptical route includes a base frame for supporting all the components of the apparatus, two handlebars move along the symmetric semi elliptical route, two feet pedals move along the symmetric semi elliptical route in harmony with the handlebars, Two link mechanisms to create symmetrical semi elliptical route to support handlebars and feet pedals, power transmission system to connect link mechanisms and synchronize their motion. This apparatus enables user to move hands forward/backward in the same direction so that hands have a lateral divergent motion at the start of the route and lateral convergent motion at the end of the route. By moving hands along the symmetric semi elliptical route a symmetrical variable pressure will be applied on the different muscles. Feet move along the symmetric semi elliptical route in full harmony with hands so that hands move backward/forward in the opposite direction of feet.

Abstract: An exercise apparatus includes a pair of step-up apparatuses wearable on feet of a user. Each step-up apparatus is configurable between an expanded configuration and a compressed configuration to simulate a selected motion when the user wearing the pair of step-up apparatuses travels by foot. One of the step-up apparatuses moves towards the expanded configuration while the other step-up apparatus moves towards the compressed configuration.

Abstract: The invention relates to an elliptical trainer including: a frame having a first end and a second end; a rocker-rod mechanism hingedly connected to the first end of the frame; a pedal mechanism hingedly connected to the second end of the frame through a transmission mechanism; an adjustment mechanism including an adjustment table, one end of the adjustment table being rotatably connected to the frame, the pedal mechanism being slidably connected to the adjustment table, the adjustment mechanism adjusting the position of the pedal mechanism relative to the frame; and a link the two ends of which are connected to the rocker-rod mechanism and the pedal mechanism respectively so that the rocker-rod mechanism is linked with the pedal mechanism.

Abstract: The invention relates to an elliptical trainer including: a frame having a first end and a second end; a rocker-rod mechanism hingedly connected to the first end of the frame; a pedal mechanism connected to the frame and the rocker-rod mechanism, the pedal mechanism being linked with the rocker-rod mechanism on the frame; a resistance adjustment mechanism provided at the first end of the frame, the resistance adjustment mechanism being connected to the pedal mechanism through a transmission mechanism for adjusting the movement resistance of the pedal mechanism. In the apparatus of the invention, there are two resistance adjustment ways i.e. manual resistance adjustment and electronic-controlled resistance adjustment, the user can select any one or both according to requirements.

Abstract: A stretching machine of two seat having bases and backrests which is pivotally mounted to the base including a first leg platform having a pivot end and a free end, the pivot end being connected to the base of the seat and a second leg platform having a pivot end and a free end, the pivot end being connected to the base of the seat. The stretching machine includes a mechanism for rotating the backrest relative to the seat as well as a mechanism for rotating the leg platforms about their respective pivot ends such that the free ends move in a generally arcuate path.

Abstract: A system and method for a mixed or virtual reality-enhanced stationary exercise bicycle, comprising a stationary bicycle device, a belt-like attachment, and a mechanical arm attachment attached to the base of a stationary bike, used for measuring and determining user position for virtual or mixed reality-enhanced software.

Abstract: A robot for assisting a user in playing golf includes a self-propelled body, a memory device, a processor, a display device, a positioning device, a compass device, a lidar device and a Doppler radar that cooperatively estimate a position at which a golf ball would likely land after a shot, and to display the estimated position on a golf course map for assisting the user to find the golf ball.

Abstract: Described is a system for prediction of adversary movements. In an aspect, the system includes one or more processors and a memory, the memory being a non-transitory computer-readable medium having executable instructions encoded thereon, such that upon execution of the instructions, the one or more processors perform operations of computing relative positions of multiple objects of interest, generating a feature representation by forming a matrix based on the relative positions, predicting movement of the multiple objects of interest by applying clustering to the feature representation and by performing canonical correlation analysis, and controlling a device based on the predicted movement of the multiple objects of interest.

Abstract: Apparatuses, methods, and program products are disclosed for tracking physical activity. One apparatus includes a processor, and a memory that stores code executable by the processor. The code is executable by the processor to detect, by use of the apparatus held by a first person, a second person in close proximity to the first person. The code is executable by the processor to track physical activity of the first person. The code is executable by the processor to transmit at least a portion of the tracked physical activity of the first person to an electronic identity corresponding to the second person to enable attaching at least the portion of the tracked physical activity of the first person to the electronic identity corresponding to the second person.

Abstract: Apparatus, systems, and methods are provided for measuring and analyzing movements of a body and for communicating information related to such body movements over a network. In certain embodiments, a system gathers biometric and biomechanical data relating to positions, orientations, and movements of various body parts of a user performed during sports activities, physical rehabilitation, or military or law enforcement activities. The biometric and biomechanical data can be communicated to a local and/or remote interface, which uses digital performance assessment tools to provide a performance evaluation to the user. The performance evaluation may include a graphical representation (e.g., a video), statistical information, and/or a comparison to another user and/or instructor. In some embodiments, the biometric and biomechanical data is communicated wirelessly to one or more devices including a processor, display, and/or data storage medium for further analysis, archiving, and data mining.

Abstract: The invention relates to a device for training coordinative faculties. The device has at least one movable standing plate; at least one static base plate; at least two connecting elements, the height of which can be modified and which act between the at least one movable standing plate and the at least one static base plate, a user interface; and a control element. The device is designed to specify a sequence of various setpoint positions of the centre of gravity of a user standing on the at least one movable standing plate, each of the setpoint positions being specified for a determined duration, and to continuously measure the actual position of the centre of gravity of the person standing on the moving plate.

Abstract: Wearable electronic devices that are designed to be worn on the head of a user while the user is swimming can determine swimming strokes and swimming performances of the user using motion sensors. Using a sound speaker, the wearable electronic device can play music and provide audio feedback to the swimmer. By comparing the swimming performance of the swimmer wearing the device with previously recorded swimming data, the wearable electronic device can provide audio comparison results to the swimmer while the swimmer is swimming in water. The wearable electronic device can also support similar functions for other sports and physical activities.

Abstract: Multi-layered golf balls containing a two or three-layered cover assembly are provided. In one embodiment, the cover assembly includes a relatively hard inner cover and relatively soft outer cover. Alternatively, the cover assembly may include a relatively soft inner cover with a relatively hard outer cover. Three-layered covers comprising an inner cover, intermediate cover, and outer cover layer also may be prepared. Preferably, at least one of the layers is formed from a thermoplastic composition that comprises: a) ethylene acid copolymer, b) plasticizer, and c) cation source. A sulfonamide, alkyl diacid ester, or organophosphate or organosulfur compound is preferably used as the plasticizer. The cover assembly has good impact durability and helps provide the ball with relatively high resiliency at given compressions.

Abstract: The invention provides a golf ball having a core and a cover of one or more layer encasing the core, wherein, letting HU-A and HU-B be respectively the Martens hardnesses measured at positions 100 ?m and 200 ?m inward from a surface of an outermost layer of the cover and toward a center of the core, and letting HU-C be the Martens hardness measured at a position 100 ?m from an inner side of the outermost cover layer and toward the surface, HU-A or HU-B is harder than HU-C.

Abstract: An object is to provide a badminton racket capable of easily achieving different performance properties on both sides of the hitting surface easily. A racket includes a frame which extends annularly, a grip, and a string which is stretched across the frame to form a hitting surface on both sides of the frame. The frame is formed to make the front surface portion and the back surface portion thereof asymmetrical in shape in a cross sectional view taken along a plane orthogonal to the extension direction of the frame. The formation of the frame into such an asymmetrical shape makes it possible to change performance properties on shuttlecock hitting between the front and back sides of the hitting surface at the time of hitting the shuttlecock, thus making it possible for the player to obtain two difference capabilities with the single racket simply by changing his or her grip.

Abstract: An object is to make it possible for a single racket to present different design appearances easily. A racket includes a frame which extends annularly, a grip, and a string which is stretched across the frame to form a hitting surface on both sides of the frame. The frame and the shaft is provided with a first colored portion and a second colored portion. As the racket is viewed from a certain angle in a direction nonparallel and non-orthogonal to the hitting surface, the first colored portion appears visible while the second colored portion is hidden from view, and flipping the hitting surface from this state causes the second colored portion to appear visible and causes the first colored portion to be hidden from view.

Abstract: Golf club heads with cavities and inserts, and methods to manufacture golf club heads with cavities. Various embodiments include a golf club head comprising a body. The body comprises a strikeface at a front of the golf club head, a backface opposite the strikeface, a heel region, a toe region opposite the heel region, a sole, a rear portion at a rear of the golf club head, and a cavity located between the backface and the rear portion. In many embodiments, the body further comprises an insert within the cavity.