51 results about "Colored smoke" patented technology

A multifunctional law enforcement tool, preferably includes several of the tools needed by law enforcement and security personnel. In one embodiment the multifunctional tool comprising a flashlight, stun gun, deterrent spray, glass breaker, I.D. holder, deterrent spray stun and cartridge housings. The cartridge housings allow the user to fire non-lethal rounds such as stun, bean bag, rubber bullets, balls and other projectiles. It may also fire tactical rounds such as colored smoke, breach rounds and concussion rounds. The cartridge housings may also house other battery powered devices such as cameras, audio and video recorders. In a second embodiment the cartridge housings are removed for a lighter more compact unit.

The invention is a multifunctional law enforcement tool, which includes several of the tools needed by law enforcement and security personnel. In one embodiment, the multifunctional tool comprises a flashlight, deterrent spray dispenser and removable cartridge housing. The cartridge housing is an open bay on the tool, and is adapted to receive cartridges which allow the user to fire non-lethal rounds such as bean bags, rubber balls, O.C. powder, multiple probe neuromuscular disruption rounds, and many other projectiles. Inserted cartridges also fire tactical rounds such as colored smoke, breach rounds, and concussion rounds. In addition, the tool may optionally include LED light, stun gun, stun projectile, glass breaker, I.D. card holder, pistol mount, laser sight, and audio microphone or audio / visual camera. Additionally, a standard defense, ballistic defense and / or electrified “stun” shield may be attached to the tool. Additionally, a handle canister with dual bladders creating a deterrent spray stun mechanism may be provided. Additionally, other optional equipment, for example, a walkie talkie, telephone, safety strap, video display screen and Global Positioning System may also be added to the tool.

The invention is a multifunctional law enforcement tool, which includes several of the tools needed by law enforcement and security personnel. In one embodiment, the multifunctional tool comprises a flashlight, deterrent spray dispenser and removable cartridge housing. The cartridge housing is an open bay on the tool, and is adapted to receive cartridges which allow the user to fire non-lethal rounds such as bean bags, rubber balls, O.C. powder, multiple probe neuromuscular disruption rounds, and many other projectiles. Inserted cartridges also fire tactical rounds such as colored smoke, breach rounds, and concussion rounds. In addition, the tool may optionally include LED light, stun gun, stun projectile, glass breaker, I.D. card holder, pistol mount, laser sight, and audio microphone or audio / visual camera. Additionally, a standard defense, ballistic defense and / or electrified “stun” shield may be attached to the tool. Additionally, a handle canister with dual bladders creating a deterrent spray stun mechanism may be provided. Additionally, other optional equipment, for example, a walkie talkie, telephone, safety strap, video display screen and Global Positioning System may also be added to the tool.

A colored smoke module is disclosed that is mountable to at least a portion of a cigarette or other smoking device. The colored smoke module produces colored smoke when burned. Further, the colored smoke module is user mountable to a cigarette or other smoking device.

A tread rubber composition for tires, including a sublimation dye that is activated by heat generated by frictional contact with a road surface to generate smoke having various colors at a wavelength of about 39˜76 10-6 cm in a frequency range of about 39.5˜77×10-13 vps. In addition, a tire including the tread rubber composition and a method of manufacturing the tread rubber composition are also provided. According to the current invention, the tread rubber composition included in the tire can generate smoke having a single color or mixed colors selected from among various colors, therefore obtaining smoke that gives optimal enjoyment and satisfies requirements of drivers at motor sports events, such as drifting.

The invention relates to a device and a method for eliminating colored smoke plume generated during wet desulphurization. The device comprises a wet desulfurization absorption tower, a wash-cooling system and a smoke heat exchange system. By arranging the wash-cooling system between a spray layer of a traditional wet desulfurization absorption tower and a defogger, smoke in the wet desulfurizationabsorption tower is washed and cooled, temperature of clean smoke at an outlet of the wet desulfurization absorption tower is lowered, and humidity of saturated smoke is decreased. By arranging the smoke heat exchange system at an inlet and the outlet of the wet desulfurization absorption tower, clean smoke at the outlet of the wet desulfurization absorption tower is heated by heat of raw smoke generated before desulphurization, temperature of exhaust smoke is enabled to be 10 DEG C higher than a dew point temperature, and no forming of colored smoke plume or gypsum rain is ensured. The device and the method for eliminating the colored smoke plume generated during wet desulphurization have the advantages that desulphurization efficiency is increased, the carried fluid in the smoke is reduced, dedusting efficiency of the wet desulfurization absorption tower is increased, exhaust smoke humidity is decreased, and the exhaust smoke is free from colored smoke plume or gypsum rain.

A colored smoke module is disclosed that is mountable to at least a portion of a cigarette or other smoking device. The colored smoke module produces colored smoke when burned. Further, the colored smoke module is user mountable to a cigarette or other smoking device.

A smoking device is disclosed including an inhalation portion and a combustion portion joined to the inhalation portion. The combustion portion includes a combustible product portion surrounded by a wrapping portion. The combustion portion also includes a colored smoke producing element that produces colored smoke. The color of the smoke produced is communicatively significant, and may correspond to a quality of the smoking device, and / or a characteristic of one smoking the smoking device, and / or an event.

The invention, which belongs to the technical field of fuel oil leakage detection, discloses a leakage detection device of a fuel oil evaporation system. The leakage detection device comprises an electric pump, a pressure sensing unit, a voltage control unit, and a color smoke generator. The electric pump is used for filling a fuel oil evaporation system with gas in a gas storage tank. The pressure sensing unit is used for detecting a current pressure value in the fuel oil evaporation system. The voltage control unit is used for receiving the current pressure value fed back by the pressure control unit and determining whether the fuel oil evaporation system has an unqualified leakage point or not according to the current pressure value and a first preset pressure value. The color smoke generator is used for outputting color smoke to the fuel oil evaporation system when an unqualified leakage point exists in the fuel oil evaporation system so as to prompt the position of a leakage point. In addition, the invention further discloses a leakage detection method of the fuel oil evaporation system, so that the leakage points of the fuel oil evaporation system are convenient to remove, the detection efficiency is improved, and maintenance procedures are reduced.

The invention provides a high-temperature water slag flushing steam colored smoke plume treatment system and method, and the system comprises a granulation white smoke elimination tower, a slag flushing water inlet, a high-temperature slag inlet, a spraying device, a condenser, a second demister, a re-heater, an exhaust fan, a slag flushing pool, a water spraying unit and a heat taking unit, the slag flushing pool is connected with the tower wall at the bottom of the granulation white elimination tower through a slag ditch A, and the side wall at the top of the slag flushing pool is connectedwith the tower wall of the granulation white elimination tower through a steam return pipeline B; wherein a high-temperature slag runner of the heat removal unit is connected with a high-temperature slag inlet in the bottom of the granulation white elimination tower, the heat removal pipe bundle is arranged under the ground of the high-temperature slag runner, an inlet of the heat removal pipe bundle is connected with a heating medium water outlet of the re-heater, and an outlet of the heat removal pipe bundle is sequentially connected with a heating medium water pump and a heating medium water inlet of the re-heater. The blast furnace slag flushing steam can be deeply purified, the discharge amount of hydrogen sulfide, sulfur dioxide and other acid pollutants is reduced, slag flushing steam waste heat recycling is achieved, and the water consumption of a slag flushing system is greatly reduced.

The invention provides a double-curve natural ventilation, condensation, water lifting and white smoke elimination integral device which comprises a condenser, wherein the condenser comprises a smokeinlet and a smoke outlet; the smoke outlet is communicated with a chimney; a demister is arranged on the chimney; a water storage tank is arranged on the lower side of the chimney; a double-curve ventilation tower is arranged on a cooled gas flowing side of the condenser; and the smoke outlet of the chimney faces the air outlet of the ventilation tower. By adopting the device, water can be saved,the manufacturing cost is low, low energy consumption can be achieved in the operation process, and in addition, phenomena of colored smoke plume and gypsum rain can be effectively eliminated.

The invention relates to a novel application of a screened pigment to color fuming, a fuming method and equipment for realizing the method. According to the fuming method, a prepared fuming agent is a single pigment component or a mixture; during tank filling, compressed nitrogen is introduced; ignition is performed with a valve instead of a firing mechanism; and the fuming agent is not heated under the driving action of the pressure storing gas, and aerosol is formed directly and is discharged into the atmospheric air for forming colored smoke. The pigment is preferably pigment scarlet, hansa yellow G, phthalocyanine blue B or phthalocyanine green G. A fuming tank comprises a guiding tube, a pressure handle, a safety pin, a lifting handle, a thimble, a pressure gauge, a device head, a barrel, a powder absorbing tube, a guiding tube socket, a bottom ring and a nozzle. Due to the adoption of the color fuming method and fuming equipment disclosed by the invention, a fuming agent formula does not contain a large quantity of dangerous goods and toxic substances, fuming components are greatly increased, energy is saved, environmental protection is facilitated, and safety and reliability are realized; and the problem of different igniting time caused by different temperatures is solved, and fuming can be stopped at any time as required.

The invention discloses a multi-physical-quantity measurement system based on light-gas gun loading and an experiment method, and belongs to the technical field of mechanical experiments and digital measurement. The two-point high-frequency laser velocimeter is arranged between the light-gas gun and the slide bar type clamp capable of measuring the impact force, the adjustable compensation light source is erected near the slide bar type clamp capable of measuring the impact force, the high-strain-rate strain gauge is pasted at a preset key point of the target plate and is electrically connected with the dynamic strain gauge, the transient impact force sensor is installed in the target bin, the transient impact force sensor is connected with the high-speed data collector through a signal line, the high-speed data collector is connected with the integrated signal processor through a data line, the laser focusing device is installed on the side, away from the light-gas gun, of the target bin, and the high-frequency laser displacement meter is installed on the side, away from the light-gas gun, of the target bin, the colored smoke generator is communicated with the target bin through a smoke conveying pipeline, and high-speed cameras are installed on the side, away from the light-gas gun, of the target bin and the left side or the right side. The method is used for multi-physical-quantity measurement.

The invention provides a science popularization teaching aid and a science popularization method about the safety of nuclear power station reactors. The science popularization teaching aid comprises a sealed containment vessel, a loop pressure boundary arranged in the containment vessel in a sealed manner, and a fuel jacket arranged in the loop pressure boundary in a sealed manner, the science popularization teaching aid also comprises a containment vessel evacuation valve, a colored smoke generator, a colored smoke filling valve arranged on a pipeline between the colored smoke generator and the loop pressure boundary, and a loop leakage valve arranged on a pipeline between the loop pressure boundary and the containment vessel, the containment vessel discharges internal gas via the containment vessel evacuation valve, the containment vessel and the loop pressure boundary are at least partly transparent, and light bands are arranged in the fuel jacket. According to the above science popularization teaching aid, colored gas is employed to simulate the diffusion process of radioactive materials during accidents in a nuclear power station, and the effect of three safety barriers of the nuclear power station is visually and vividly displayed to the public.

The invention discloses a device for recovering smoke waste heat and dedusting and eliminating colored smoke plume. The device is capable of greatly reducing the moisture content of purified smoke byusing an absorption device firstly, in a process that vapor is absorbed by absorption liquid, because of latent heat released by phase change, the dryness and temperature of the purified smoke are improved, and the effect of eliminating the colored smoke plume, deeply lifting water, reducing the dust content of the purified smoke and recovering the water vapor low-quality latent heat in the purified smoke can be achieved; and the absorption liquid in the absorption device turns into waste liquid after water vapor is absorbed, the waste liquid is sent to a regeneration device, regenerated to become the absorption liquid through the heat exchange with the original smoke, and conveyed to the absorption device again, the waste heat of the original smoke is used in a regeneration process, the vapor of a power plant is not used in the regeneration process, and the vapor consumption can be effectively reduced; finally, sensible heat of the original smoke and the latent heat of the purified smoke water vapor are deeply recovered and used through the above means, the fact that a lot of cold sources is used in cooling and condensing processes in the prior art is avoided, and water resourcesare greatly saved.

The invention discloses a waste gas purification treatment system which is used for recovering waste gas generated by crushing and cracking waste lithium batteries. The lithium battery cracking wastegas purification system comprises a 2-stage incinerator, an air-cooled heat exchanger, a bag dust remover, an induced draft fan, a 2-stage washing tower, a colored smoke plume treatment device, and anactivated carbon adsorption device, and waste gas finally enters a chimney for reaching the standard discharge; waste gas generated by the recovered waste lithium batteries subjected to freezing, crushing and pyrolysis of a rotary kiln are collectively referred to as pyrolysis waste gas, similarly hereinafter; and after the pyrolysis waste gas is subjected to the high-temperature incineration technology, the pyrolysis waste gas is subjected to multi-stage purification. The system realizes dry purification so as to facilitate the recovery of precious rare metals (such as positive electrode materials, aluminum powder and the like) in the lithium batteries, and meanwhile, the system realizes the standard discharge and achieves the environment impact assessment requirement.

The invention relates to a fluid catalytic cracking (FCC) flue gas treatment system and an FCC flue gas treatment method. The system comprises a selective catalytic reduction (SCR) reactor, a waste heat boiler, a pre-dust remover, a water mist generator, a wet desulphurization device, a wet electrostatic precipitator, a jet apparatus, a temperature detection device and a sulfur trioxide concentration detection device, wherein a flue gas inlet of the SCR reactor is used for introducing FCC flue gas to be treated; a flue gas outlet of the SCR reactor is communicated with a flue gas inlet of thewaste heat boiler by means of a pipeline, a flue gas outlet of the waste heat boiler is communicated with a flue gas inlet of the pre-dust remover by means of a pipeline, a flue gas outlet of the pre-dust remover is connected with a flue gas inlet of the wet desulphurization device by means of a pipeline, and a flue gas outlet of the wet desulphurization device is communicated with a flue gas inlet of the wet electrostatic precipitator by means of a pipeline; a flue gas outlet of the wet electrostatic precipitator is used for discharging the treated FCC flue gas. The FCC flue gas treatment system and the FCC flue gas treatment method have the advantage of effectively treating colored smoke plume in the FCC flue gas.

The invention discloses an oil and gas pipeline protection device. The device comprises a pipeline, a protection device body, a spring part, a rubber sheet, a plastic square box, bolts and other components; the protection device body is formed by welding supporting legs and diagonal bars on the lower portion, a concentric-square-shaped steel pipe, steel wire meshes and the like on the upper portion; the concentric-square-shaped steel pipe is welded to be in a grid shape; the steel wire meshes are welded to the upper surface and the lower surface of the concentric-square-shaped steel pipe; the plastic square box is filled with colored smoke and arranged in grids of the concentric-square-shaped steel pipe; the rubber sheet and the spring part are sequentially located on the lower portion of the concentric-square-shaped steel pipe; the pipeline protection device and the pipeline are fixed through the bolts; and when external force acts on the pipeline, the concentric-square-shaped steel pipe and the steel wire meshes counteract part of the external force, if the plastic square box is damaged, the colored smoke of the plastic square box escapes, constructors can be warned, and part of impact force can be relieved through the spring part and the rubber sheet under the plastic square box. The pipeline can be protected in a multi-layer manner, the reminding function is achieved, the application range is wide, and operability is high.

The invention relates to a high-efficiency energy-saving colored smoke plume management system, and belongs to the technical field of smoke plume management. The system comprises gate valves 1, air-cooling heat exchangers 2, defoggers 3, a flue gas pipeline 4, air-cooling heat exchanger fans 5, an air-cooling hot air pipeline 6, air coolers 7, a cold air pipeline 8, a mixer 9, a mixed gas pipeline10 and an exhaust funnel 11. The system provided by the invention effectively utilizes air as a cold source and as a heat carrier to superheat dead steam, no water resources or other heat sources areconsumed, and the system is simple, reduced in investment and reduced in operating costs, and has broad application prospects.

The invention relates to the technical field of environmental protection devices, in particular to a double-effect device for utilizing waste heat of tail gas of a gas-fired boiler and eliminating colored smoke plume. The double-effect device comprises a smoke-organic working medium heat exchanger, a smoke-water heat exchanger, a compressor, a condenser, a drying filter, a metal corrugated pipe, astop valve, a hot water pump, a water-water heat exchanger, a U-shaped pipe and an expansion valve. The mode adopted by the invention is a condensation dehumidification mode, the flue gas temperatureis reduced to T through two-stage cooling and heat pump technologies, the moisture content in the flue gas is effectively reduced to eliminate colored smoke plume, waste heat in the flue gas is recycled, the quality is improved, and the double-effect device is used for supplying heat and has environment-friendly and energy-saving values.

The invention discloses a device for recovering flue gas waste heat and cooperatively eliminating wet smoke plume. The water content of clean flue gas is greatly reduced by the aid of an absorption device, steam releases latent heat owing to phase change when being absorbed by absorption liquid, the dryness and the temperature of the clean flue gas can be improved, colored smoke plume can be eliminated, deep water extraction can be performed, the dust content of the clean flue gas can be reduced, and low-quality latent heat of water vapor in the clean flue gas can be recovered. The absorptionliquid absorbing the water vapor in the absorption device is changed into dilute solution, the dilute solution is conveyed into a regenerating device, exchanges heat with saturated steam generated bythe regenerating device and is regenerated into concentrated solution, the concentrated solution is conveyed into the absorption device, the saturated steam generated after compression of secondary steam at the top of the regenerating device in the regeneration process, the saturated steam releasing the latent heat is changed into condensed water, cost and energy consumption are reduced, and the device has excellent social and economic impact.

The invention discloses a system and method for eliminating colored smoke plume in wet desulphurization flue gas, belonging to the technical field of atmospheric governance. The system comprises a super-gravity dehumidification absorber, wherein the super-gravity dehumidification absorber is provided with a desulphurization wet flue gas inlet, an absorbent inlet and a purified flue gas outlet, andthe super-gravity dehumidification absorber is used for mixing desulphurization wet flue gas entering from the desulphurization wet flue gas inlet and an absorbent entering from the absorbent inlet in the super-gravity dehumidification absorber to remove water vapor and SO3. The system is simple in structure and suitable for industrial treatment of the atmosphere. The method comprises the step ofmixing the desulphurization wet flue gas and the absorbent in the super-gravity dehumidification absorber to remove water vapor and SO3 by adopting the system. According to the method, 60-70% of water vapor and all SO3 in the dehumidified flue gas can be effectively removed; and compared with a traditional method, the method has the advantages that blue smoke generated by SO3 can be thoroughly removed while white smoke is removed, energy consumption is greatly reduced, and good economic benefits and social benefits are achieved.

The invention provides an air conditioner disinfector function display device and method. According to the air conditioner disinfector function display device and method, a disinfection and purification module and a fan are fixed in a glass air duct, and the area between the disinfection and purification module and an air inlet valve can be filled with colored smoke through the air inlet valve and a smoke generating device. By controlling the working states of the fan and the disinfection and purification module, the disinfection and purification effect of the disinfection and purification module can be displayed; a user can see the disinfection and purification effect of the disinfection and purification module more visually, the disinfection and dust removal effect of the air conditioner disinfector comprising the disinfection and purification module can be proved, and the user experience feeling is improved; and moreover, the publicity credibility can be improved, and the sales volume of the air conditioner disinfector is improved.

The invention relates to the technical field of fan performance testing, and provides a performance test device for multifunctional fans. The device is mainly composed of a measuring port, a front aircylinder, a rear air cylinder, a support frame and rubber plugs. The measuring port, the front air cylinder and the rear air cylinder are sequentially connected and supported by the support frame. The rubber plugs are arranged in corresponding holes of the front and rear air cylinders. The device adopts a detachable measuring port which can realize testing analysis of many different sizes of fans. The air cylinders are divided into two parts, the front and the rear. An L-shaped structure is adopted at the joint to realize circumferential positioning, and a flange is adopted to realize axial positioning. Other components can be added between the front and rear air cylinders, so the device has high configurability. Measuring holes of different sizes are formed on the front and rear air cylinders for testing the performance of a fan such as flow, noise and gas flow traces. The air cylinder is made of transparent organic glass, and colored smoke is blown into the hole of the front cylinder, so that the gas flow trace therein can be observed. The device has the characteristics of low cost, wide application, high configurability and comprehensiveness.

The invention belongs to and relates to a flue gas emission purification device, in particular to low-temperature flue gas efficient desulfurization, denitrification and white smoke removal integratedequipment, which solves the technical problems in the background art, and comprises an equipment shell, the front end and the rear end of the equipment shell are respectively provided with a flue gasinlet and a flue gas outlet; wherein a cooling heat exchange device, a mixed oxidation device filled with a strong oxidant, a high-pressure atomization spraying device filled with alkali liquor, a condensation heat exchange device, an adsorption device and a heating heat exchange device are sequentially arranged in the equipment shell from front to back. The device is simple in process route, lowin investment cost, small in occupied area, simple and compact in structure, high in automation degree, high in removal efficiency, low in operation cost and high in applicability; the SOX and NOX removal efficiency is high, the colored smoke and rain treatment effect is good, and the requirements that desulfurization, denitrification and white smoke removal can be conducted at the same time through only one set of equipment, and finally environment-friendly ultra-clean emission is achieved are truly met.

The invention provides a cement kiln tail waste gas colored smoke plume treatment system and method. The system comprises a first exhaust fan, a second exhaust fan, a desulfurization tower, a condensation system, a cyclone mixer and a waste heat boiler. Cement kiln tail waste gas before desulfurization sequentially enters a first exhaust fan, a desulfurization tower, a condensation system and a cyclone mixer through a kiln tail waste gas pipeline A, and cement kiln head dry flue gas sequentially enters a waste heat boiler, a second exhaust fan and the cyclone mixer through a kiln head flue gaspipeline B; an outlet of the cyclone mixer is connected with a chimney through a mixed gas pipeline C; a first flow temperature sensing device is further arranged at an inlet of the rotational flow mixer of the kiln tail waste gas pipeline A, a second flow temperature sensing device is further arranged at an outlet of the rotational flow mixer of the mixed gas pipeline C, and the relative humidity of mixed exhaust smoke is automatically controlled to be lower than the set humidity. According to the invention, deep condensation treatment of pollutants is realized, thorough elimination of visual pollution is also realized, the system is economic, reliable, intelligent and efficient, and the environmental protection problem is solved.

The invention discloses a wet flue gas desulfurization tower which comprises a tower body, wherein a desulfurization slurry tank, a tray, a slurry spray layer and an ordinary demister are sequentiallyarranged in the tower body from bottom to top; a heating type demister is further arranged above the ordinary demister; the heating type demister comprises a flue gas inlet collection box, an inlet mother tube, a radiating tube, a cooling fin, an outlet mother tube and a connection chimney flue; the flue gas inlet collection box is communicated with the inlet mother tube, the inlet mother tube iscommunicated with the radiating tube, the radiating tube is communicated with the outlet mother tube, the cooling fin is arranged on the radiating tube, and the outlet mother tube is communicated with a lower space of the tray in the tower body through the connection chimney flue. The wet flue gas desulfurization tower disclosed by the invention can reduce possibility of gypsum rain and colored smoke plume (white smoke emission) from source.

The invention provides a colored smoke plume removal system and application, and belongs to the field of colored smoke plume treatment. The colored smoke plume removal system comprises a dust removal device, a circulating water cooling device, an ammonia desulfurization tower, a spraying device, a condensation separation device, a demisting device and a gas-liquid mixed heating device which are sequentially arranged in the flowing direction of smoke; a heating medium water outlet of the gas-liquid mixed heating device is communicated with a refrigerant water inlet of the circulating water cooling device; and a refrigerant water outlet of the circulating water cooling device is communicated with a heat medium water inlet of the gas-liquid mixed heating device to form a closed loop. According to the colored smoke plume removal system, conversion circulation of refrigerant water and heating medium water can be achieved while condensation is conducted firstly and then hot removal is conducted on colored smoke plume, so that circulating water systems do not need to be established respectively, the operation cost is reduced, water resources are saved, meanwhile, smoke heat energy can be recycled, and the flue gas temperature can be reduced, ammonia gas can be absorbed, secondary smoke plume is prevented, and the removal effect of the colored smoke plume is improved.

The invention relates to the technical field of aviation colored smoke pulling agent, in particular to a water-based colored smoke pulling agent for aviation and a preparation method thereof. The main components of the water-based color smoke pulling agent are diethylene glycol and coloring dyes. The present invention changes oily fuming components into water-based fuming components, changes coloring dyes into water-based coloring dyes, reduces the types and amounts of various additives used, and selects special water-based coloring components. It solves the problems of difficult cleaning and lack of smoke color in traditional colored smoke-pulling agents, and achieves a safe, environmentally friendly and non-toxic use effect, and also broadens the scope of application of colored smoke-pulling agents to models, and can be applied to multiple It overcomes the shortcomings of the traditional third-generation oil-based color smoke puller, and successfully obtained a fourth-generation aviation color smoke puller that is convenient to clean, safe, environmentally friendly and non-toxic, and suitable for multiple models.