|| List of recent Pressor-related patents
| Implementing misr compression methods for test time reduction|
A method and circuits for implementing multiple input signature register (misr) compression for test time reduction, and a design structure on which the subject circuits reside are provided. The misr compression circuit includes a first misr, a second misr provided with the first misr, and a compressor to compress misr data positioned in one of between the first misr and second misr and after the second misr..
International Business Machines Corporation
| Efficient one-pass cache-aware compression|
Exemplary method, system, and computer program product embodiments for efficient one-pass cache-aware compression are provided. In one embodiment, by way of example only, an output of a fast compressor to huffman encoding for achieving the one-pass cache-aware compression by using a predetermined huffman-tree upon determining by the fast compressor a final representation of each data byte..
International Business Machines Corporation
| Voice quality enhancement techniques, speech recognition techniques, and related systems|
An echo canceller can be arranged to receive an input signal and to receive a reference signal. The echo canceller can subtract a linear component of the reference signal from the input signal.
| Process and plant for manufacturing polyethylene-silane-copolymers|
The present invention relates to a process for manufacturing polyethylene-silane-copolymer conducted in a plant including at least one compressor unit and at least one reactor downstream of the compressor unit. The process includes the steps of (a) feeding a first feed stream including ethylene into the at least one compressor unit and subsequently to the at least one reactor, and (b1) feeding a second feed stream including at least one silane comonomer to the at least one reactor as front feed and/or (b2) feeding a second feed stream including at least one silane comonomer to the at least one reactor at at least one location along the reactor..
| Methods and compositions for generating and using allogeneic suppressor cells|
The present invention is directed to generating suppressor cells by treating naive t cells with a suppressor-inducing composition such as anti-cd3, anti-cd28, il-2, tgf-β, or some combination thereof. Such suppressor cells are administered to patients to prevent or treat immune disorders and are allogeneic to the patient..
University Of Southern California
| Generating methanol using ultrapure, high pressure hydrogen|
In various implementations, methanol is produced using a (co+h2) containing synthesis gas produced from a combined pox plus ehtr or a combined atr plus ehtr at a pressure of 70 bar to 100 bar at the correct stoichiometric composition for methanol synthesis so that no feed gas compressor is required for the feed to the methanol synthesis reactor loop.. .
| Compressor with cyclone and internal oil reservoir|
A rotary compressor including a housing that defines an inlet, a low pressure chamber, an outlet, and a high pressure chamber defining a high pressure lubricant sump. A drive shaft passes through the housing and a compression element is coupled to the drive shaft between the low pressure chamber and the high pressure chamber.
Thermo King Corporation
| Adjusting device for an adjusting piston of a variable clearance space of a reciprocating compressor|
In order to enable a continuous adjustment of the variable clearance space (1) of a reciprocating compressor (15), a threaded spindle drive with a threaded spindle nut (10) and a threaded spindle (9) is provided as an adjusting device (7), wherein the threaded spindle nut (10) is embodied as a plastic nut (20) with internal thread (24), the plastic nut (20) is arranged with an external thread (23) on an internal thread (22) of a nut carrier (21) of the threaded spindle nut (10), and the thread height (y) of the internal thread (22) of the nut carrier (21) and the thread height (x) of the external thread (25) of the threaded spindle (9) is respectively embodied with 50 to 80% of the radial thickness (d) of the plastic nut (20) and the plastic thickness is at least 15% of the thread pitch (z1) of the internal thread (24) at least in the region of the thread flanks (26) of the internal thread (24) of the plastic nut (20).. .
Hoerbiger Kompressortechnik Holding Gmbh
| Exhaust-gas turbocharger|
An exhaust-gas turbocharger (1) with a housing (2), a shaft (3) mounted in the housing (2), a compressor wheel (5) which is arranged on the shaft (3) and which has a plurality of blades (6), and a turbine wheel (4) which is arranged on the shaft (3) and which has a plurality of blades (6), with a rotary measurement arrangement having a pressure sensor (8), wherein the pressure sensor (8) is arranged to detect pressure fluctuations (10) in the gas at the compressor wheel (5) or turbine wheel (4).. .
Disclosed compressor embodiments can prevent or substantially reduce the inefficient upwardly spiraling heat buildup found in typical compressors by significantly increasing the surface area of mating piston and chamber walls, using the meshing and undulating geometry of the piston/chamber walls to create increased air turbulence in the chamber and generate more air flow against the cooling walls, promoting turbulence even more by varying the axial path of the piston head so that it is not simply linear, using fluid to cool the non-working side of the piston, and/or providing additional cooling features (such as fins) on the non-working side of the piston to provide still further cooling means for the piston head. Analogous principles can also be included in wobble-plate compressors, scroll compressors, blowers, and other compressor types..
Hybrid drive engine
A hybrid drive engine uses air foil shaped disks of a first configuration for a compressor portion thereof and air foil shaped disks of a second configuration for a turbine portion thereof, whereby the disks exhibit aerodynamic effects of lift. Particularly, the compressor disks are configured to cause aerodynamic lift off of a periphery of the disks, while the turbine disks are configured to cause aerodynamic lift off of an inner hole of the disks.
The invention relates to an instrumented airfoil for mounting in a flow passage through a turbine, compressor, or module of a turbine engine. An instrumentation member is attached to an airfoil and includes information-obtaining means received in a cutout formed in the airfoil and projecting relative to the leading edge or the trailing edge.
An exhaust-gas turbocharger (1) with a bearing housing (2), a shaft (3) mounted in the bearing housing (2), a compressor wheel (5) arranged on the shaft (3) and a turbine wheel (4) arranged on the shaft (3), a housing component (7) which surrounds the compressor wheel (5) or the turbine wheel (4), and a sealing ring (14) between the bearing housing (2) and the housing component (7), wherein the sealing ring (14) is, in order to impart its sealing action, compressed in a direction perpendicular to the shaft (3).. .
System and digital signal processing
The present invention provides methods and systems for digital processing of an input audio signal. Specifically, the present invention includes a high pass filter configured to filter the input audio signal to create a high pass signal.
Device and optimizing compression level of harq signal
A device for optimizing a data compression level when processing a hybrid automatic repeat request (harq) signal includes a combiner which receives a log likelihood ratio (llr) signal, determines whether the llr signal is a new or retransmitted signal, and generates a composite signal by combining the llr signal with a related signal received and previously stored when the llr signal is the retransmitted signal; a compression level decision unit which calculates a first compression level based on quality of a received signal, calculates a second compression level based on an available memory size, and decides a final compression level according to the first compression level and the second compression level; a compressor which compresses the llr signal according to the final compression level; a harq memory which stores the compressed signal; and a decompressor which decompresses a signal read from the harq memory.. .
Disclosed are can taps for dispensing fluids from containers. The can tap has a housing with a housing net and a housing outlet, and a pin and a tap outlet.
E I Du Pont De Nemours And Company
Portable generator and air compressor mounting arrangement
A system, in one embodiment, may include a chassis, an engine coupled to the chassis, a generator coupled to the engine, and a rotary screw compressor coupled to the chassis independent from the engine. The engine may be configured to drive both the generator and the rotary screw compressor.
Illinois Tool Works Inc.
Method and compressing gas in a plurality of stages to a storage tank array having a plurality of storage tanks
A method and apparatus for compressing gases and supplying compressed gaseous fuel to a consuming device, such as a gaseous fueled vehicle or the like. One embodiment includes a gas compressor for compressing the gaseous fuel to an array of tanks having predetermined initial set points which are increasing for tanks in the array.
New Gas Industries, L.l.c.
Modulating check valve
A modulating check valve and method of operating the modulating check valve adapted for mounting to an inlet of a compressor. The modulating check valve includes a flow section through which fluid flow.
A system and method for controlling the quantity of compressed air that may enter into an engine cylinder during the intake stroke of a piston during an engine braking event. A control throttle may be positioned to restrict the quantity of compressed air that may enter into the cylinder during the intake stroke.
International Engine Intellectual Property Company Llc
In the case of a heating operation in which a use side heat exchanger functions as a condenser when the outside air has a predetermined low temperature, a low-outside-air-temperature heating operation start mode is executed in which, while a refrigerant, as discharged from a compressor, flows into the use side heat exchanger, the refrigerant is supplied to the injection port of the compressor via an injection pipe and a part of a refrigerant that is accumulated in an accumulator is supplied to the compressor via a connecting pipe, and thereafter a low-outside-air-temperature heating operation mode is executed in which the refrigerant, as discharged from the compressor, is supplied to the injection port of the compressor via the injection pipe while flowing into the use side heat exchanger.. .
Mitsubishi Electric Corporation
High pressure ratio multi-stage centrifugal compressor
A heat pump system includes a refrigerant circuit. First and second heat exchangers are arranged in the refrigerant circuit.
Danfoss Turbocor Compressors B.v.
Removal device for a fluid
The invention relates to a removal device (10) for removing a fluid from a refrigeration system, comprising a cooling device (11), through which the fluid is to flow and which has a pipeline assembly (12), which has a plurality of pipeline elements (24, 26) connected to each other, a fluid inlet (28) arranged above the pipeline elements, and a fluid outlet (30) arranged below the pipeline elements, the removal device having a compressor (14), which is arranged before the cooling device (11) in the flow direction and through which the fluid can flow and which is connected to the fluid inlet (28), is easier to clean because the pipeline elements are each arranged at an inclination of an angle (alpha) from the horizontal in such a way that all fluid entering through the fluid inlet (28) is moved to the fluid outlet (30) by gravity.. .
The present invention provides a heat pump that includes: a compressor, a switching valve, an indoor heat exchanger, a first expansion valve, and an outdoor heat exchanger, wherein the outdoor heat exchanger includes: a primary heat exchanging unit connected with the first expansion valve through a refrigerant pipe and through which outdoor air exchanges heat; a secondary heat exchanging unit connected with the switching valve through a refrigerant pipe, disposed behind the primary heat exchanging unit in the flow direction of outdoor air, and through which the outdoor air, which has exchanged heat through the primary heat exchanging unit, exchanges heat; a connection pipe that connects the primary heat exchanging unit and the secondary heat exchanging unit with each other; and a second expansion valve that is disposed in the connection pipe. Therefore, it is possible to improve both cooling performance and heating performance with minimum parts and a simple structure..
Lg Electronics Inc.
Refrigerating capacity control device, a testing apparatus and a refrigerating control method using the device
This invention hereof discloses a refrigerating capacity control device, a test apparatus and a refrigerating control method using the device. The refrigerating capacity control device comprises a compressor (2), a condenser (5), an evaporator (7), a controller (1), a pressure regulating valve (4), a throttling device (6), a control panel (13) for driving a hot-gas valve, and a hot-gas valve (11).
Xutemp Temptech Co., Ltd.
Controller for a vapour compression system and a controlling a vapour compression system
The invention discloses a controller for a vapour compression system for cooling a refrigerated space. The system comprises a circuit for circulation of a refrigerant between a compressor, a condenser, and an evaporator.
Apparatus and recovering and regenerating a refrigerant from an a/c plant
An apparatus (230) for recovering refrigerant from an air conditioning system (200) comprises an evaporator (232) arranged to receive the refrigerant from the air conditioning system (200) and to separate it from impurities in it present, obtaining purified refrigerant, a compressor (233) for circulating the purified refrigerant, a condenser (236), and a storage container (60) arranged to contain the condensed refrigerant. The storage container (60) defines a storage chamber (61) arranged to contain a liquid phase of the refrigerant (25) and a gaseous phase (26) comprising a vapour component of the refrigerant (26a) and an air component (26b).
Device and icing prevention regulation for heat pump evaporators
The invention relates to a device and a method for icing prevention regulation for a heat pump evaporator (3) in air conditioning systems of vehicles, composed of a subsection (1) of a refrigerant circuit which can be operated both as a heat pump and also as an air conditioning system. The device comprises the heat pump evaporator (3), an electrical or mechanical refrigerant compressor (4), a cooler fan (9) which is attached to the heat pump evaporator (3) and which draws ambient air (11) upstream from and through the heat pump evaporator (3) at an adjustable flow speed, and which thus permits a permanent flow of ambient air (11) over the heat pump evaporator surface, a first temperature sensor (6) in or on the refrigerant line (5, 5a) upstream from the heat pump evaporator (3) with respect to the heat pump operating direction, and a control and regulating unit (8).
Pneumatic system for an aircraft
A bleed air system for an aircraft has a gas turbine engine and operating method. The system includes an environmental control system (ecs) for providing cabin airflow to the aircraft, including operating modes such as first and second air cycle machine operating modes and heat exchanger operating modes.
Gas turbine with flexible air cooling operating a gas turbine
A gas turbine for a gas and steam turbine plant and method for operating a gas turbine is provided. The gas turbine includes a cooling system for cooling inlet air taken from compressor extractions or compressor discharge and introduced to the turbine(s) and/or combustor(s) of the gas turbine which is adapted for flexible operation in a combined cycle application as well as a simple cycle application.
Alstom Technology Ltd.
Flushing the exhaust gas recirculation lines of a gas turbine
A method and gas turbine are provided for the reliable purging of an exhaust gas recirculation line of the gas turbine with exhaust gas recirculation without the use of additional blow-off fans. A blow-off flow of the compressor is used for the purging of the exhaust gas recirculation line.
Alstom Technology Ltd
Extracting heat from a compressor system
A system includes a gas compressor system and a thermal cycle. The gas compressor system includes a compressor housing defining an interior compressor chamber.
Access Energy Llc
Displaying device and using the same
A displaying device comprises a movable storage device adjustable between at least a closed position and an open position, an elastic image-building body adjustable between at least an inactive position and an active position. The image-building body, in its inactive position, is arranged to be accommodated by the storage device in the closed position thereof.
Outdoor fan and indoor blower controller for heating, ventilation and air conditioning system and operation thereof
An hvac controller, a method of operating an hvac controller and an hvac system employing the controller or the method. In one embodiment, the hvac controller includes: (1) a processor couplable to at least two refrigerant pressure sensors via separate data paths to receive input signals therefrom and further couplable to a compressor stage and a condenser fan to provide output signals thereto, and (2) memory coupled to the processor and storing a software program having program instructions capable of causing the processor to command the compressor stage or the condenser fan to turn on irrespective of a state of an input signal generated by either of the at least two refrigerant pressure sensors, and generate an error message at least partially depending upon whether or not a high pressure shutdown occurs after the processor commands the compressor stage or the fan to turn on..
Lennox Industries Inc.
Process for deep thermal treatment of corn, for high-yield production of whole nixtamal (boiled corn) and reactor for obtaining the necessary conditions for the process
The present invention refers to a new, different cooking process of products to be nixtamalized, for instance, corn, as well as a specially designed reactor to be used in the deep thermal treatment. Essentially, the process comprises the loading of a mixture of product to be nixtamalized and water into the container; shaking of the mixture by air injection from an air compressor; separation of floating residues and discharge of wastewater; introduction of hot and clean water into the container and the addition of lime, thus creating a product-water-lime mixture; stirring of the product-water-lime mixture by injecting air from the air compressor; igniting the burner until a target temperature is obtained in the reactor container; and turn off the burner and conditioning of moisture inside the reactor container for a determined period of time where prior to the end of the determined period of time it is proceeded to shake the cooked product-water-lime mixture by air injection from the air compressor..
Materials and methods useful for affecting tumor cell growth, migration and invasion
It is disclosed herein that mir-221 and mir-222 down-regulate pten and timp3 tumor suppressors, resulting in trail resistance. The present invention provides research, diagnostic, and therapeutic tools and methods related to this discovery.
The Ohio State University
The orbiting base plate 61 has a compression side surface and a back pressure chamber side surface. The gas passage 64 has an opening 641 in the compression side surface of the orbiting base plate 61 between portions of the orbiting spiral wall 62 that face each other, and the gas passage 64 has an opening 642 in the back pressure side surface at a position that faces an area on a radially inner side than the outer circumference of the bearing 5, so as to feed the refrigerant gas in the compression chamber 15 to the back pressure chamber 16..
Kabushiki Kaisha Toyota Jidoshokki
Bypass valve, in particular compressor bypass valve
A bypass valve (1), in particular a compressor bypass valve, having a valve housing (2); a valve guide body (3), which is fixed in the valve housing (2); and a valve disk (4), which is guided between a closed position and an open position by the valve guide body (3) in the valve housing (2). The the valve guide body (3) and the valve disk (4) are in the form of plastic parts..
Internal-driven compressor having a powered compressor rotor
The internal-driven compressor having a powered compressor rotor. The internal-driven compressor includes a compressor housing including a suction port and a discharge port, an internal driver including a rotor and a stator, the rotor and the stator located within the compressor housing, the stator located radially inward of the rotor, and a powered compressor rotor including an annular body extending about a center axis, wherein the rotor is fixed to the powered compressor rotor and configured to rotate the powered compressor rotor about the center axis in response to a force imparted by the stator..
Solar Turbines Incorporated
Variable displacement swash plate compressor
A variable displacement swash plate compressor includes a control pressure chamber and a displacement control valve that controls the pressure of the control pressure chamber. The displacement control valve includes an electromagnetic solenoid, a driving force transmission member, a valve body, and a pressure sensing mechanism.
Kabushiki Kaisha Toyota Jidoshokki
Method for creating a metal reinforcement with insert for protecting a leading edge made of composite
A method for producing a metal reinforcement for protecting a leading edge of a compressor blade of composite, including: creating a core that has a shape of an internal cavity of the reinforcement; creating an insert made of an alloy of a hardness greater than that of the reinforcement; shaping sheet metal by stamping with the creation, upstream of the core, a cavity between the metal sheets, which cavity is configured to accept the insert, positioning the sheets around the core with the insert placed in the cavity and securing the assembly together; creating a vacuum and closing the assembly by welding; consolidation by hot isostatic pressing; cutting the assembly to extract the core and separate the reinforcement; creating an external profile of the reinforcement by a final machining operation that reveals a material of the insert.. .
A turbomachine apparatus for driving a compressor is disclosed. The turbomachine apparatus contains at least one rotor stage and at least one retaining element.
Reaction Engines Ltd.
Motor housing for a cabin air compressor
Motor housing for a cabin air compressor includes a central body portion having a center wall thickness and an internal cavity that is configured to receive an electric motor, a first end portion having a second internal cavity that is configured to receive a first end winding of the stator, and a second end portion having a third internal cavity configured to receive a second end winding of the stator. A ratio of a wall thickness of either of the first or the second end portions to the motor wall thickness is at least greater than 1.68 to 1..
Hamilton Sundstrand Corporation
A turbocharger for an engine includes a compressor impeller, a turbine wheel, a turbine housing, a cover, and a flow passage switching valve. The impeller is for compression of intake air.
Piezoelectric damper system for an axial turbomachine rotor
The present application relates to a rotor of a compressor or axial turbomachine comprising a vibration-damping system equipped with piezoelectric transducers distributed circularly and connected to dissipative resonant electric circuits. The circuits are closed and are equipped with a resistor and a coil.
Universite Libre De Bruxelles
Supersonic compressor with separator
A fluid processing device may include a rotatable shaft, a driver configured to drive the rotatable shaft, a separator installed on the rotatable shaft, and a supersonic compressor fluidly communicating with the separator.. .
Methods and apparatus to adjust bleed ports on an aircraft engine
Methods and apparatus to adjust bleed ports on an aircraft engine are disclosed. An example apparatus for bleeding air from a multi-stage compressor of an aircraft engine includes a compressor case having a plurality of bleed ports.
The Boeing Company
Wellhead mounted transient voltage surge suppression and use thereof
The invention is directed to a system and method for lightning strike protection for oil well electric motors and cables, and in particular, an explosion-proof transient voltage surge suppressor that is mounted internally or attached externally to a packer penetrator directly on a wellhead. The transient voltage surge suppressor can be incorporated directly into the packer penetrator pipes along with the power wires.
Pm&d Engineering, Inc.
Power conversion device, motor drive control apparatus including the power conversion device, air blower and compressor including the motor drive control apparatus, and air conditioner including the air blower or the compressor
A power conversion device includes a switching control unit that controls respective switching elements constituting a plurality of chopper circuits, a rectified-voltage detection unit, a bus-bar voltage detection unit, and a bus-bar current detection unit. The switching control unit includes an on-duty calculation unit that calculates a reference on-duty of respective drive pulses with respect to the switching elements based on a bus-bar voltage and a bus-bar current, an on-duty correction unit that corrects the reference on-duty to output on-duties of the respective drive pulses based on the bus-bar current, so that change amounts of respective reactor currents become substantially the same, and a drive-pulse generation unit that generates the respective drive pulses, based on the respective on-duties..
Mitsubishi Electric Corporation
Tuned vibration neutralizer device
The present invention relates to a vibration neutralizer designed, more specifically, for use in refrigeration compressors, especially aimed at reducing noises and vibrations derived from the operation of the compressor motor used in the refrigeration equipment. It basically comprises at least one rod (2) cooperating with the compressor (1), wherein said physical rod comprises at least one fastening means (21) and at least one shaft (22) cooperating with at least one fastening means(21); and at least one body (3) cooperating with the at least one rod (2), wherein the at least one body (3) comprises an elastomeric material (31) coated with at least a layer (32) of metallic material..
Process for recovering heat from a hydrocarbon separation
A process for recovering heat from the separation of hydrocarbons. The overhead vapor stream from a fractionation column is passed to a two stage heat pump compressor.
System and multi-stage bypass, low operating temperature suppressor for automatic weapons
The present disclosure relates to a suppressor for use with a weapon. The suppressor may be formed to have a body portion having a bore extending concentric with a bore axis of the weapon barrel.
Lawrence Livermore National Security, Llc
Method of controlling an exhaust recirculation gas system
A method of controlling an exhaust gas recirculation system of an internal combustion engine is disclosed. The engine includes a compressor, an intake manifold, an after-treatment system, a low pressure egr system and a high pressure egr system.
Gm Global Technology Operations Llc
Compressor and oil amount management system for compressor
A compressor compresses a coolant gas returned from a refrigerator and supplies the coolant gas to the refrigerator. A compression capsule compresses the coolant gas and cools compression heat generated by compressing the coolant gas, using oil.
Sumitomo Heavy Industries, Ltd.
Method for improved assembly of an actuator for an air bleed valve of a turbine engine
A method for assembling an actuating ram of air bleed valves, which ram is placed between low pressure and high pressure compressors of a turbomachine, the ram including a piston rod surrounded by a spacer extending from the piston cylinder and configured to be connected to an end of the transmission mechanism linked to the bleed valves, the method including: deploying the piston rod such that it projects from the spacer; connecting the projecting piston rod to the end of the transmission mechanism; retracting the piston rod to bring the cylinder closer to the case wall; and attaching the spacer to the case wall.. .
Sealed system for an appliance
A sealed system for an appliance is provided. The sealed system includes a capillary tube for directing refrigerant from a condenser of the sealed system to an evaporator of the sealed system.
General Electric Company
Air conditioner condensing unit for corrosive environments
An improved air conditioner condensing unit for use in corrosive environments, particularly salt water environments. The condensing unit comprises a compressor, a condenser coil comprised of refrigerant carrying tubing, which tubing contains from about 8 to about 19 fins per linear inch of tubing, and a motorized corrosive resistant shrouded fan assembly, all of which are contained in a substantially corrosion resistant housing..
Method for a part load co reduction operation for a sequential gas turbine
The invention concerns a method for a part load co reduction operation and a low-co emissions operation of a gas turbine with sequential combustion. The gas turbine essentially includes at least one compressor, a first combustor which is connected downstream to the compressor.
Alstom Technology Ltd
System and improving efficiency of a gas turbine engine
A gas turbine engine is presented. The gas turbine engine includes a control unit having a first bypass channel that is coupled between an outlet of a first turbine and an inlet of a second turbine.
General Electric Company
A rotational machine such as a turbocompressor has a fluid recovery system for recovering leaked working fluid such as gaseous helium in a helium circuit which has leaked past a shaft seal, a purifier being provided for removing contaminants from the working fluid, and turbocompressor may have one fluid such as helium or hydrogen working through one turbo component such as a turbine thereof and a second working fluid such as air or helium working through a second turbo component such as a compressor thereof, the rotational machine being installable in an engine of a flying machine.. .
Reaction Engines Ltd
Clothes treating apparatus and operating method thereof
A clothes treating apparatus including a drum, an air suction duct forming a flow path of air introduced into the drum, an auxiliary fan introducing air into the air suction duct, an air exhaustion duct forming a flow path of air exhausted from the drum, a main fan exhausting air to the air exhaustion duct from the drum, a condenser heating air sucked into the drum through the air suction duct, an evaporator cooling air exhausted from the drum through the air exhaustion duct, and a compressor and an expander forming a heat pump together with the condenser and the evaporator. The method includes measuring a discharge side pressure of the compressor, and comparing the measured discharge side pressure with a maximum allowable pressure, and determining that the auxiliary fan does not operate when the discharge side pressure is more than the maximum allowable pressure..
Lg Electronics Inc.