47results about How to "Comfortable wearing experience" patented technology

The invention relates to an adjustable near-infrared orthodontic accelerator capable of realizing precise treatment, which comprises a tooth bottom sleeve and a tooth peripheral sleeve, the tooth bottom sleeve and the tooth peripheral sleeve form a U-shaped tooth socket structure, a light inlet window is arranged in the middle of the tooth peripheral sleeve, chutes are arranged on the tooth peripheral sleeve on the upper side and the lower side of the light inlet window, a plurality of laser emitting devices are slidably arranged in the chutes side by side, each laser emitting device comprises a base and sliding plates arranged at the upper end and the lower end of the base, the sliding plates are arranged in the chutes, and infrared laser lamps are arranged on the bases. The low-intensity near-infrared light is utilized to irradiate teeth to accelerate tooth movement, the laser irradiation area is controllably adjusted while orthodontic treatment is assisted, the laser action range is more accurate, the accuracy and speed of orthodontic treatment are guaranteed, the temperature rise of materials is small after long-term use, the safety is high, the light source is tightly attached to gingiva, a patient can achieve retention without occlusion, the comfort degree is high, the size is small, and carrying is convenient.

The invention discloses a method for preparing a calcium-zinc stabilizer for shoe materials. The method comprises the following steps: S1. separately weighing 1-10 parts of zinc stearate, 10-25 partsof calcium stearate, 0.1-2 parts of zinc acetylacetone, 0.5-3 parts of calcium acetylacetonate, 20-50 parts of brucite, 5-15 parts of epoxidized soybean oil, 2-16 parts of lubricant, 5-20 parts of other metal soap, 5-25 parts of organic auxiliary heat stabilizer, 1-10 parts of unsaturated acid ester, 0.1-2 parts of antioxidant and 1-5 parts of dispersant; and S2. firstly, uniformly mixing variouspowder materials, then, adding a liquid ingredient, i.e., the epoxidized soybean oil, the lubricant and the dispersant, and continuing to carry out stirring until the material is of a wet powder or paste mixture, thereby obtaining the calcium-zinc stabilizer for the shoe materials. The calcium-zinc stabilizer for the shoe materials, prepared by the method, is free of organic lead salts and the like, thereby being environmentally friendly and safe; flying of dust can be effectively lowered; the whiteness and yellowing resistance of the shoe materials can be better guaranteed; the calcium-zinc stabilizer is difficult to separate out; and the color fastness and the like of the shoe materials can be improved.

The invention belongs to the technical field of electrophysiological signal detection, and particularly relates to a flexible contact EEG electrode and a preparation method thereof. The EEG electrodeis composed of a flexible silica gel electrode piece and an electrode base, the upper layer of the flexible silica gel electrode is a flexible silica gel layer while the lower layer of the same is a composite conductive layer, and the electrode piece after being cut is a round electrode and a connection handle; the electrode base comprises a fixing nut of an electrode piece outer fixing buckle, anelectrode lead, an EEG cap fixing base, the electrode piece outer fixing buckle and an electrode lead fixing buckle, and the electrode piece outer fixing buckle fixes the silica gel flexible electrode piece onto the electrode base and is fixed by the fixing nut; the electrode lead and the flexible silica gel electrode piece are closely press-fitted from protrusions on the inner wall of the electrode outer fixing buckle and fixed onto the EEG cap fixing base by the fixing nut. The flexible contact EEG electrode has good contact effect and is convenient and comfortable to wear, low in impedancebetween the electrode and skin, excellent in conductivity and capable of collecting high-quality EEG signals.

The invention relates to the field of disposable hygienic products, in particular to a preparation method of an antibacterial and deodorizing absorption product. The method comprises the following steps of 1, rolling a hydrophilic non-woven fabric, forming a bottom layer with a plurality of hydrophilic recesses, laying wood pulp cotton, compounding an antibacterial non-woven fabric material, carrying out secondary rolling to form antibacterial recesses, laying an SAP material, then compounding a bottom-layer non-woven fabric material on the peripheral sides of the hydrophilic recesses in a hot rolling or ultrasonic welding manner, forming dotted joint parts, and forming an absorption core; 2, forming a plurality of liquid-permeable recesses in a liquid-permeable surface layer, and forming through holes in the bottoms of the liquid-permeable recesses; 3, compounding the liquid-permeable surface layer and the absorption core, and enabling the liquid-permeable recesses and the hydrophilic recesses to be distributed in a staggered manner; and 4, compounding a bottom-layer water-repellent material to form a basic absorption product. The method solves the technical problems that an existing antibacterial and deodorizing absorption product is relatively thick and relatively poor in absorption performance.

The invention provides a method, an apparatus and a system for predicting a shoe size, and a computer readable storage medium. The method includes: receiving selection of shoes from an individual; acquiring at least one shoe feature vector regarding selection of the shoes; acquiring at least one foot feature vector for at least one foot of the individual; evaluating the at least one shoe feature vector and the at least one foot feature vector by comparison with a predictive model to generate the shoe size of the individual, wherein the predictive model is generated from records of a pluralityof data bodies, and each record is associated to the shoe size selected by one of the plurality of data bodies, the at least one shoe feature vector of the selected shoe, and the at least one foot feature vector.

The invention relates to a health-care sports jumpsuit. The health-care sports jumpsuit comprises a jumpsuit body, a smart device and maintenance components, wherein fabric containing silver fiber issewn in an area of the jumpsuit body; the smart device comprises a device casing, a functional circuit board and a battery; a maintenance and healthcare control system is arranged on the functional circuit board and comprises a main control module, a power management module, at least one load output control module, an equipment interface module, a wireless communication module and a display module. According to the health-care sports jumpsuit, the temperature of the surface of the health-care sports jumpsuit can be adjusted according to the environment temperature by means of the area containing the silver fiber, and comfortable wearing experience of the jumpsuit which is warm in winter and cool in summer is brought to a user; static electricity of the body of the user can be eliminated, and injury of electromagnetic radiation is avoided; operation of the maintenance components is controlled through the smart device, blood circulation is promoted, development of cells of the body is stimulated, each part of the body is promoted to develop normally, and the bodybuilding exercise effect is realized.

The invention relates to the technical field of medical supplies, in particular to human body contact fixing equipment for medical exercise cardiopulmonary function testing equipment. The human body contact fixing equipment comprises an upper ring and a lower ring, the upper ring and the lower ring are semi-cylindrical, the outer wall of the end part of the cylinder is integrally connected with a protruding transverse plate, hook devices are arranged at the two ends of the upper ring, one side of each hook device is in contact with a pressure body, the hook devices and the pressure bodies are arranged in the protruding transverse plate of the upper ring, one end of each pressure body is in contact with a supporting body, the supporting bodies are arranged in a semi-cylindrical shell of the upper ring, one side of the lower ring is fixedly connected with a pulse sensing instrument, and the upper ring and the lower ring are oppositely buckled to form a cylindrical shape. According to the human body contact fixing equipment for the medical exercise cardiopulmonary function testing equipment, the fixing equipment can be conveniently and rapidly installed on the arm of a patient, control can be rapidly completed only by manually pulling a door-shaped plate frame in the installation or removal process, a large amount of time is saved, the upper ring and the lower ring are matched to firmly bind the arm, and the problem of separation is avoided.

The invention discloses antibacterial cotton chinlon graphene twill fabric and a dyeing method thereof, and belongs to the technical field of textile. The fabric adopts a structure of two upper twillweaves and one lower twill weave formed by tatting warp yarns and weft yarns; the twill weaves are repeated continuously; the warp yarns are 32S cotton yarns and are formed by spinning combed cotton through a ring spinning method; the weft yarns are 70D pure chinlon and 70D chinlon containing graphene; the 70D pure chinlon and the 70D chinlon containing graphene are distributed at intervals; in the chinlon spinning process of the 70D chinlon containing graphene, 0.5 to 5 percent of graphene materials are added into spinning liquid, so that the yarns have the wear resistance and high stretchingresilience rate characteristics of the chinlon, also has the antibacterial property, warm-keeping property, anti-static property, ultraviolet resistance and high air permeability of the graphene, andeffectively protects human body health while increasing the comfort level of the clothing fabric.

The invention discloses a glove which comprises a first palm piece of a glove fingertip and a rear side piece of the glove fingertip; the first palm piece and the rear side piece are integrally formed; and the tail ends of the finger parts of the first palm piece and the rear side piece are sewn together to form a three-dimensional structure, and the seam of the first palm piece and the rear side piece is located on the fingernail or located on the back face of the finger. The glove comprises a complete material piece which is completely wrapped on the fingertips and is integrally formed by the first palm piece and the rear side piece, and the sewing part of the first palm piece and the rear side piece is moved from the fingertips to the back faces of the fingers. Compared with the prior art, the glove is provided with a glove structure capable of fully covering the fingertips, in working gloves and sports gloves, thick seam edges on the fingertips are completely eliminated, the material pieces are smoothly attached to the operation faces of the whole fingertips, and finally the touch feeling of the fingers is improved. Due to the increase of the touch feeling, the glove is more comfortable and more practical than gloves in the prior art.

The invention relates to a watchband, and particularly provides a stepless adjustment watchband of an intelligent terminal; the stepless adjustment watchband of the intelligent terminal comprises a first watchband piece and a second watchband piece. The second watchband piece is fastened in the first watchband piece in a sliding manner, wherein the first watchband piece comprises a watchband external member, a first buckling element, a buckled part, an elastic unit and a button unit. According to the invention, the structure is adopted; the buckled part and the buckling part are meshed and fixed, and unlocking and reset fixing are realized through the button unit and the elastic unit, so that stepless adjustment is realized while the appearance integrity of the watchband is ensured; the problems that in the prior art, holes need to be formed in the appearance of a long watchband body in two connecting modes, the appearance integrity of a product is damaged, meanwhile, due to the influence of the distance between the holes, stepless fine adjustment and adaptation of the length of the watchband cannot be achieved after buckling are solved, and thus a wearer can have the wearing experience of fitting the watchband more comfortably.

The invention discloses a pair of dual-purpose smart bras, which comprises cups, shoulder straps, a bottom band, side panels and back straps, wherein a back buckle is arranged on the back straps; each cup comprises an upper cup and a lower cup; openings are formed between the upper and lower cups; zippers are arranged at the openings; the back buckle comprises a left side back buckle and a right side back buckle; a flat thin electromagnet group is arranged in the left side back buckle; a flat thin magnet is arranged in the right side back buckle; a controller is arranged on one back strap; a power supply, a fingerprint identification system and a conversion switch are arranged in the controller; the positive pole of the power supply is connected with the fingerprint identification system; the fingerprint identification system is connected with the conversion switch; the conversion switch is connected with the flat thin electromagnet group; the flat thin electromagnet group is connected to the negative pole of the power supply; a Bluetooth module is arranged on the conversion switch, and communicates with a mobile terminal. According to the dual-purpose smart bras, a detachable cup structure is adopted, so that the bras can be used as strap bras with 3 / 4 cups, and can also be worn as strapless decorative bras with 1 / 2 cups; in addition, a smart back buckle structure is additionally arranged, so that the dual-purpose smart bras are convenient and rapid.

The invention relates to the field of intelligent wearable equipment, in particular to a wearable device for monitoring human health parameters in real time. The device comprises a device body, a fixing structure, a wearing structure, a driving structure, an adjusting structure, an extrusion structure and a rotating structure. By the arrangement of the fixing structure, the device body can be fixed, so that the device is prevented from falling off in a running process after being worn; Through the arrangement of the wearing structure, the device body can be more comfortably worn on the arm; through the arrangement of the driving structure, the fixing structure is convenient to control, so that the device body is convenient to disassemble and assemble; through the arrangement of the adjusting structure, the adjusting structure can be matched with the driving structure to move, so that the device body is convenient to disassemble and assemble on the fixing structure; the wearing structure can be more convenient to use through the arrangement of the extrusion structure; and the wearing structure can be more convenient to use in combination with the extrusion structure through the arrangement of the rotating structure.

The present invention is a neck care collar, which includes an outer shell and an inner liner, the outer shell includes a flannelette layer and a plastic layer, and the flannelette layer and the plastic layer are sewn into an outer shell, and the outer shell is connected to form a ring structure through a connecting piece; The inner lining plate is a plastic plate whose two ends are arc-shaped and tapered in the middle; a zipper for assembling and disassembling the inner lining plate is connected to the outer casing; a plurality of ventilation holes are opened on the plastic layer; The inner surface of the fleece layer is connected with a memory cotton layer. The present invention can be used in daily use, and can also be used for rehabilitation of cervical spine patients, especially for workers who face computers for a long time or people who often play with mobile phones, it will have better protection and correction effects.

In view of the shortage of manufacturing methods and materials of a conventional sleep bruxism protective occlusal splint, the invention provides a sleep bruxism protective occlusal splint prepared byapplying digital impression, computer-aided design and computer-aided manufacturing. The sleep bruxism protective occlusal splint is characterized in that upper and lower jaw dentition data and the occlusal relationship after occlusal elevation are obtained by an intraoral scanning technology, and upper and lower jaw dentition digital models and the occlusal relationship are matched with a virtual occlusal frame system of a computer; with computer-aided design software, front and rear dental cusps can be guaranteed to be in even contact with the occlusal splint; a material is cut through a computer-aided manufacturing device, medical-grade engineering plastic polyether-ether-ketone (PEEK), polyether ether sulfone (PEES) or polyether sulfone (PES) with excellent performance is used, the selected material can be determined according to the order of severity of sleep bruxism and the type of a restoration body of teeth of a patient, a final restoration body is obtained and is worn into amouth, and the dentition is protected and abnormal wear is prevented. The method aims at simplifying and optimizing the manufacturing process of the sleep bruxism protective occlusal splint, reduces discomfort, saves cost, and is beneficial to environmental protection.

The invention discloses an oxygen inhalation device for emergency nursing, comprising an oxygen humidifying bottle, metering tubes, oxygen filters and oxygen cylinders, wherein the oxygen humidification bottle comprises a humidification unit, an intake knob, an outlet pipe, metering tubes, screwed caps and seals, the outlet pipe is connected with an oxygen delivery pipe, the left side of the oxygen delivery pipe is fixedly connected with an oxygen inhalation mask of a child, the bottom of the child oxygen mask is provided with a skin-like structure, the inside of the child oxygen mask is fixedly connected with a nose support, the side of the child oxygen mask is provided with an elastic ear hanger, the air inlet knob is connected with an air inlet pipe, the air inlet pipe is fixedly connected with an oxygen cylinder, and the top of the oxygen cylinder is provided with a leak-proof sealing plug. The invention relates to an emergency nursing oxygen inhalation device, which is easy to useand has strong practicability by providing a skin-like structure at the bottom of an oxygen inhalation mask for children under two years of age, so as to provide comfortable wearing experience for children under two years of age.

The invention relates to the technical field of medical supplies, in particular to a medical exercise cardiopulmonary function test system. It is characterized by comprising a mask and a contact fixing device. According to the medical exercise cardiopulmonary function test system, the effect of conveniently and rapidly replacing breathable cloth is achieved, moisture in a concave plate is sensed through a control device, in this way, the monitoring and timing effects are achieved, the longer the mask is worn by a patient, moisture absorption balls are sufficiently eroded by the moisture, the situation that the clamping position of an L-shaped column is broken can occur, workers can know the situation, and the breathable cloth needs to be replaced in time, By means of the contact fixing device, fixing equipment can be conveniently and rapidly installed on the arm of the patient, control can be rapidly completed only by manually pulling a door-shaped plate frame in the installing or taking-down process, a large amount of time is saved, an upper ring and a lower ring match and firmly bind the arm, and the problem of disengagement is avoided.

The invention belongs to the technical field of electrophysiological signal detection, and particularly relates to an integrated flexible electroencephalogram cap convenient and comfortable to wear. The electroencephalogram cap is of a three-layer structure, the outer layer is a fixed layer, the middle layer is a conductive layer, and the inner layer is an insulation shielding layer; raised fulcrums with holes are arranged on the inner side of the fixed layer, and the positions of the raised fulcrums correspond to the positions of flexible electroencephalogram electrodes; a detachable hardware box is arranged on the outer side and is used for placing a corresponding hardware module; a jaw belt plays a role in tightening and fixing; a flexible electroencephalogram electrode with a hole, a wire and a correspondingly led-out interface are printed on the conductive layer; and holes are formed in the positions, corresponding to the flexible electroencephalogram electrodes, of the insulation shielding layer, and other parts of the insulation shielding layer are insulated and have the shielding function. According to the electroencephalogram cap, the electroencephalogram electrodes and corresponding connecting lines are directly integrated together, good contact, a convenient wearing mode and comfortable wearing experience are achieved, and early-stage work of electroencephalogram monitoring is greatly simplified.

The invention discloses a preparation method of parallel 8-shaped multi-dimensional crimped PA6 / PA66 double-component fibers and a product thereof. The preparation method comprises the following steps: PA6 slices are selected as one raw material, and PA66 is selected as the other raw material, wherein the mass ratio of the PA6 to the PA66 is 1: 2-2: 1; two-component spinning is carried out throughtwo screws, the screw temperature of the PA66 is set to be 270-300 DEG C, the screw temperature of the PA6 is set to be 240-270 DEG C, and POY pre-drawn yarn is prepared; and preparation of the PA6 / PA66 two-component composite DTY fiber is achieved: the prepared PA6 / PA66 two-component composite pre-drafted POY fiber is elasticized through an elasticizer to prepare the PA6 / PA66 two-component composite DTY fiber. The composite fiber is of a parallel 8-shaped multi-dimensional crimped structure, the hand feeling of the prepared yarn is cotton feeling and wool feeling, and the spun fabric has thestyle and comfort of a natural fabric and also has the characteristics of aging resistance and mildew resistance of chemical fibers.

According to the invention, a solution of a flexible substrate material is filled with the gas to form bubbles, then the bubble film is separated from the solution and is rapidly cured at room temperature, therefore a flexible substrate thin film is simply and conveniently prepared by using the expansion bubble blowing method, the thickness of the flexible substrate thin film can be as low as 50nm, then a conductive metal film formed by spraying on a hard substrate is transferred to the flexible substrate film, and the thickness of a flexible bioelectric dry electrode formed by the conductive metal film and the flexible substrate film becomes extremely small. The prepared flexible bioelectric dry electrode is good in transparency and can make conformal contact with the skin surface, the resistance of the flexible bioelectric dry electrode is not affected by skin deformation, the contact impedance between the electrode and the skin is low, and it can be guaranteed that follow-up bioelectric signals are collected. The flexible bioelectric dry electrode is good in air permeability and provides comfortable wearing experience; the pain and skin irritation brought to people in the stripping process can be reduced on the premise that good attachment is achieved without a medical adhesive; and the manufacturing method is simple and low in cost.

The invention provides an AR glasses system based on an ultra wide band and a use method thereof. The AR glasses system comprises an AR glasses end and an AR calculation end. The AR glasses end comprises an AR glasses frame, and a glasses end display module, a glasses end ultra-wideband transmission module, a glasses end sensing module, a glasses end battery module and a glasses end control module which are fixed at the AR glasses frame; the AR calculation end comprises a calculation end operation module, a calculation end ultra-wideband transmission module, a calculation end display module, a calculation end battery module and a calculation end control module; the glasses end ultra-wideband transmission module and the calculation end ultra-wideband transmission module are connected based on an ultra-wideband communication protocol. According to the technical scheme provided by the invention, based on an ultra-wideband wireless communication technology, AR glasses end and the AR calculation end can be ensured to perform effective data transmission, meanwhile, the mass of the AR glasses end is lighter, and a wearer has better wearing experience.

The invention discloses a silver filter element based on electrofluid printing and a preparation method and application of the silver filter element. The printed silver filter element is obtained by printing high-density silver grids on a substrate non-woven fabric through electrofluid printing. The method for printing the silver filter element comprises the steps of cleaning and drying a substrate non-woven fabric, then printing silver grids on the substrate non-woven fabric by adopting an electrofluid printer, and annealing and curing the printed non-woven fabric to obtain the silver filterelement. The preparation process is simple, the cost is low, and good antibacterial, antiviral and breathable properties are achieved.

The invention discloses a protective garment which comprises a garment body, the garment body is provided with a neckline part for a user to stretch out the head, an elastic sealing ring is arranged on the inner circumference of the neckline part, and the elastic sealing ring can be tightly attached to the neck of the user; the helmet is connected with the clothes in a sealed mode, the helmet is provided with a neck opening part, the neck opening part is arranged corresponding to the neckline part, a transparent mask is arranged on the helmet, and the helmet is configured to enable the head of a user to rotate in the helmet; the supporting pieces are arranged on the two shoulders of the clothes body, and the supporting pieces are connected with the helmet and used for supporting the helmet. According to the protective clothing provided by the invention, through the arrangement of the supporting pieces, the supporting pieces can be supported on the two shoulders of the user, the helmet is supported on the supporting pieces, and at the moment, the weight of the helmet can be borne by the two shoulders of the user through the supporting pieces, so that the helmet does not need to be supported by the head of the user, and the pressure of the helmet on the head of the user can be reduced; and a more comfortable wearing body is brought to a user.

The invention discloses a self-cooling sports mold cup, a preparation process and a sports bra. The self-cooling sports mold cup comprises a first surface layer, a second surface layer and a middle layer arranged between the first surface layer and the second surface layer, the first surface layer is an outer layer, the second surface layer is a skin-friendly layer, the first surface layer and the second surface layer are both sandwich fabric, the middle layer is made of one or more of sponge, latex sponge, vertical sponge or foamed silica gel, a plurality of through holes are formed in the middle layer, the through holes extend in the thickness direction of the middle layer, and each through hole is of a structure narrowing from the first surface layer to the second surface layer. The self-cooling sports mould cup provided by the invention has a physical ventilating and cooling effect and can realize cooling and self-cooling, so that the bra is more transparent, lighter and cooler, the problem that sports bra cups are stuffy and airtight is solved, and healthier and more comfortable wearing experience feeling can be achieved; and the sports bra provided by the invention meets the functional conditions of hand feeling, water washing, supporting and the like of sports bra.

According to the shoe sole with the magnetic field and the shoe with the shoe sole, the shoe sole with the magnetic field is integrally formed by stacking a sweat absorbing layer, a waterproof magnetic layer and an anti-skid bottom layer, the sweat absorbing layer is located on the top of the whole shoe sole with the magnetic field and is the topmost layer of the shoe sole with the magnetic field, and the waterproof magnetic layer is arranged on the bottom face of the sweat absorbing layer and is located on the bottom face of the anti-skid bottom layer. A plurality of magnetic holes are uniformly distributed in the waterproof magnetic layer; compared with the prior art, the waterproof magnetic layer is composed of a large-area rubber layer and small-area wood blocks, a good waterproof effect is achieved at low cost, meanwhile, a magnetic field can pass through as much as possible, a large number of micropores are fully distributed in the anti-skid bottom layer, water drops can be prevented from entering the anti-skid bottom layer, feet can be prevented from being hurt by pebbles and the like, and the anti-skid bottom layer is good in waterproof effect. Therefore, the whole sole has comfortable wearing experience, the magnetic performance of the sole is guaranteed as far as possible, and the sole is healthy and health-preserving.

The invention provides a sport recovering garment. The garment comprises a first garment area, second garment areas, third garment areas and fourth garment areas; the first garment area which extends from a waist area of the garment to a neck area of the garment along the central back of the garment; the second garment areas extend to an oxter area of the garment along two sides of the waist area; the third garment areas are arranged on an axilla area of the garment; the fourth garment areas are arranged between the first garment area and the second garment areas, between the first garment area and the third garment areas, or between the third garment areas and the second garment areas; the compression degrees of the third garment areas are smaller than the compression degrees of the first garment area, the second garment areas and the fourth garment areas, and the compression degrees of the first garment area and the second garment areas are larger than the compression degree of the fourth garment areas. According to the sport recovering garment, the problems are solved that in the prior art, aiming at the movement process, compression garments are designed without the daily experience of users taken into account, and the compression garments are lower in comfort degree and not suitable for long-time household dressing.

The invention provides a Wi-Fi6-based AR glasses system and a use method thereof. The Wi-Fi6-based AR glasses system comprises an AR glasses end and an AR calculation end, The AR glasses end comprises an AR glasses frame, and a glasses end display module, a glasses end Wi-Fi6 transmission module, a glasses end sensing module, a glasses end battery module and a glasses end control module which are fixed at the AR glasses frame; The AR calculation end comprises a calculation end operation module, a calculation end Wi-Fi6 transmission module, a calculation end display module, a calculation end battery module and a calculation end control module; and the glasses end Wi-Fi6 transmission module and the computing end Wi-Fi6 transmission module are connected based on a Wi-Fi6 communication protocol. According to the technical scheme provided by the invention, based on a Wi-Fi technology, the AR glasses end and the AR computing end can be ensured to perform effective data transmission, meanwhile, the mass of the AR glasses end is lighter, and a wearer has better wearing experience.