76results about How to "Prevent security incidents" patented technology

The invention relates to a detection system for simulating inner leak of a valve and a method thereof. The state of inner leak of a valve is simulated by controlling different openings of the valve, signals are transmitted through a differential pressure transmitter, a flow sensor and an acoustic emission probe, and corresponding data of each group is acquired by the data acquisition software at the rear end. Moreover, a set of judgment software is formed based on a great quantity of data, which can judge whether inner leak of the valve happens and judge the magnitude of leak by calling the corresponding information in a database when in field offline detection. The simulation system provided by the invention comprises medium storage tanks 1 in sequential connection and a two-level pressure reducing valve 2, a stop valve 3, a filter 6, a second valve 9, a to-be-detected valve 8, a third valve 10, a visual window 13, a flow meter group 14 and a collection tank 17.

The invention discloses an industrial control system safety protection method and device, and the method comprises the steps: monitoring and obtaining the network information of an industrial control system in real time, and recognizing a safety risk according to an industrial control safety baseline, wherein the industrial control security baseline is established on the basis of a terminal layer security baseline and a network layer security baseline in combination with a vulnerability database and a threat intelligence database. According to the method, the industrial control security baseline is established, and security risk identification, prediction, disposal, transfer and the like are carried out on the industrial control system according to the industrial control security baseline, so that security protection of the industrial control system is realized, and the security level of the industrial control system is greatly improved.

The invention provides a method for monitoring stealthy ATM (automatic teller machine) bank card substituting behavior. The method has the advantages that the method is based on a video image detection technology, characteristics of multi-channel data of occurrence of the stealthy substituting behavior are extracted by means of face and identity recognition, card fetching movement mode recognition and card inserting and fetching time interval monitoring, correlative fusion is performed on the behavior, and whether the stealthy bank card substituting behavior occurs or not is judged, so that alarm information can be generated timely, and safety accidents that bank cards are stealthily substituted can be prevented.

The invention discloses low-rank coal quality-improving pyrolysis equipment. The low-rank coal quality-improving pyrolysis equipment comprises a closed kiln with a feed inlet and a discharge outlet. A high-temperature gas pipeline is arranged in the kiln. A low-rank coal propelling and decomposing channel is formed between the high-temperature gas pipeline and the inner wall of the kiln. A decomposed gas collection pipe communicated with the low-rank coal propelling and decomposing channel is arranged on the kiln. The high-temperature gas pipeline is communicated with a high-temperature gas output / input mechanism arranged on the surface of the kiln. The low-rank coal quality-improving pyrolysis equipment has the advantages that the high-temperature gas output / input mechanism arranged on the surface of the kiln is communicated with the high-temperature gas pipeline to enable high-temperature gas to pass in the high-temperature gas pipeline, heat brought by the high-temperature gas is fully absorbed and decomposed by low-rank coal, and fuel gas, tar gas and coal with high heat value are generated in the low-rank coal propelling and decomposing channel through decomposition.

The invention discloses an intelligent driving traffic transportation system. The intelligent driving traffic transportation system comprises an intelligent rapid vehicle, an intelligent system management platform, a data interaction interface and a user terminal, wherein the intelligent rapid vehicle is used for carrying people and objects and automatically executing a conveying instruction, andcan reach the functions of precise positioning, navigation, route planning, intelligent driving and process data interaction; the intelligent system management platform is used for managing the vehicles and users, so as to reach the functions of vehicle intelligent scheduling, multi-vehicle running, cooperation and automatic charging; the data interaction interface is butted with an area server, the user terminal and Internet. The intelligent driving traffic transportation system has the advantages that the intelligent techniques of high-precision map, precise positioning, intelligent navigation, automatic driving, human and machine interaction, automatic following and the like are covered; the short-distance traffic requirement of the user in the areas can be realized by the intelligent rapid vehicle share mode based on Internet of Things, thereby improving the outgoing efficiency of the user and the utilization rate of area roads, and reducing the labor cost in the area.

The invention relates to a remote online driving management and control system and method. The system comprises a user authentication module, a remote management and control platform, a local equipment module and a remote driving module. The method comprises the following steps: receiving riding request information of a passenger, generating driving route information according to the riding request information, generating a driving command according to a driving operation executed by a local driver by referring to the driving route information, controlling the vehicle to run according to the driving command, and uploading vehicle running state data information to a remote management and control platform. According to the system and the method, a driver is separated from a riding user, safety of passengers and drivers is guaranteed, safety events between the passengers and the drivers are avoided. Meanwhile, the passengers and the drivers can send emergency request information to the remote management and control platform through the corresponding riding user modules and the corresponding local equipment modules in emergency, and timely rescue is guaranteed.

The invention discloses a safety helmet detection system for a complex scene. The safety helmet detection system comprises a data acquisition module, a safety helmet detection module and a detection result display module, the data acquisition module is used for transmitting various forms of data to the safety helmet detection module for real-time safety helmet detection; the safety helmet detection module is used for detecting videos or pictures transmitted by the data acquisition module, accurately identifying safety helmets in three states in various production scenes and transmitting detection frame coordinates and confidence coefficients to the detection result display module; and the detection result display module performs real-time labeling in input pictures and videos by utilizingthe category label, the detection frame coordinate and the confidence coefficient returned by the safety helmet detection module so as to realize real-time detection of the safety helmet in a complexscene. According to the invention, real-time and high-precision detection can be carried out on the safety helmet in complex scenes such as construction sites and mining areas, the detection accuracyis high, the robustness is high, and the situation that personnel do not wear the safety helmet can be supervised to avoid safety accidents.

The invention relates to the network security technology, and discloses a unified security defense system based on a cloud platform. The problems that the coupling degree of a transaction code and security components is high, the security problem solved by the security component is incomplete, the response speed to a security event is slow and a new security event cannot be discovered in the traditional network security scheme are solved. The system comprises a traffic analysis cluster, a request receiving cluster, a security component cluster, and an application service component cluster; the unified security defense system based on the cloud is existent in a service way in the invention, various security components are operated in the cloud platform in micro-service-oriented architecture software, and interact through inter-process communication interfaces. All applications deployed on the cloud platform only need to consider the realization of the own transaction code, the user request, the user data and the returned data are regarded as security by default; the security checking and filtering on the user request, the user data and the returned data are accomplished by the security components.

The invention relates to a wind generating set load testing system meeting the international electrical committee IEC61400-13 standard. The wind generating set load testing system is characterized by comprising a subsystem and a master control system (3), wherein the subsystem comprises a wheel hub testing system (1), a tower top testing system (2) and a meteorological testing system (4); the meteorological testing system (4) is arranged at the bottom of a meteorological anemometer mast; the tower top testing system (2) is arranged on the top of a tower cylinder; the wheel hub testing system (1) is arranged in a wheel hub of the wind generating set and rotates with the wheel hub of the wind generating set when runs; and the master control system is arranged at the bottom of the tower cylinder. The wind generating set load testing system can be applied to verifying design load of the wind generating set, optimizing design scheme of the wind generating set, detecting quality of the wind generating set which leaves factory, avoiding safety accidents and the like and has high practicability.

The invention discloses an intelligent guide method for movie theater audiences. The method comprises the following steps that 1, an LED floor lamp is arranged; 2, the floor lamp is arranged on a seat on one side of a longitudinal channel of a movie theater studio; 3, LED light sources and pyroelectric human infrared sensors are obliquely arranged towards the channel ground, and light rays emitted by the LED light sources irradiate into the channel; 4, when audiences pass through sensing areas of the pyroelectric human infrared sensors, the sensors are triggered to give electric pulse signals and carry out counting, the LED light sources are turned on through control circuits to project light rays to the faced channel ground, audiences can see channel ground conditions, characters or marks, step missing, fettering and crowding are avoided, and audients are guided to accurately and rapidly find specific seats; and 5, after audients leave the sensing areas, the LED light sources are gradually turned off. The invention further provides an intelligent guide device implementing the intelligent guide method for movie theater audiences. The intelligent guide method and device can be widely applied to intelligent management of movie theaters.

The invention discloses a long-service-life highly-efficient safe chain-belt pallet-type conveyor system which includes a chain-belt pallet-type conveyor, an automatic receiving two-way buffer diversion groove is arranged under the tail portion of the chain-belt pallet-type conveyor, an automatic two-way output diversion groove is arranged above the conveyor head, and a system frame connects the chain-belt pallet-type conveyor, the automatic receiving two-way buffer diversion groove and the automatic two-way output diversion groove into a whole. The long-service-life highly-efficient safe chain-belt pallet-type conveyor system is characterized by utilizing the automatic receiving two-way buffer diversion groove to divert iron blocks which are formed by an iron casting machine in a casting mode to a dumping ground or to the chain-belt pallet-type conveyor, and utilizing the automatic two-way output diversion groove to divert the iron blocks transported by the conveyor to different automobiles or trains to transport the iron blocks out of the producing field of the iron casting machine. According to the long-service-life highly-efficient safe chain-belt pallet-type conveyor system, the using effect and the safety performance of the conveying system of iron blocks, minerals or block-shaped materials are significantly improved, the service life is prolonged, and accidents of the chain-belt pallet-type conveyor due to the breakage of chain belts are prevented. The long-service-life highly-efficient safe chain-belt pallet-type conveyor system is safe and reliable and has high production capacity and production efficiency, and the production capacity can reach 300 to 500 tons per hour and 4000 to 10000 tons per day.

The invention relates to an energy storage quick-heating drinking apparatus, comprising a purifying device, a heat exchange device, an energy storage type heating device, a faucet assembly, a pipeline assembly, a system control device for controlling the whole drinking apparatus, and a drinking apparatus main body. The energy storage type heating device comprises a heating water tank for storing water, and a heating pipeline disposed in the heating water tank, and water in the heating water tank is used for heating purified water in the heating pipeline to boiled water. The purifying device is used for providing the heating pipeline with the purified water. The heat exchange device is used for cooling the boiled water from the energy storage type heating device. The boiled water flowing out from the heating pipeline is divided into two paths, the hot water of the first path is directly supplied to a faucet of the faucet assembly, the hot water of the second path is cooled by the heat exchange device and supplied to the faucet of the faucet assembly, so that drinking water directly passes through the pipeline without passing through the heating water tank, secondary pollution can be prevented, and re-boiled water and a mixture of unboiled water and boiled water can also be prevented.

The invention discloses a swing cable guide comprising a first clamp plate and a second clamp plate fixedly connected to each other. A swing rod device, a left tension device, a right tension device, a left limiting device, a right limiting device, a sensing proximity switch and a swing rod position limit switch are connected between the first clamp plate and the second clamp plate. The left tension device is connected between the first clamp plate and the second clamp plate on the left, and the right tension device is connected between the first clamp plate and the second clamp plate on the right. The sensing proximity switch is fixedly connected to the first clamp plate or second clamp plate. A swing rod of the swing rod device is provided with a contact element which can contact with the sensing proximity switch. The swing rod position limit switch is fixedly connected to the first clamp plate or second clamp plate. The swing rod is provided with a shift element which can contact with the swing rod position limit switch. The swing cable guide is capable of sensing a cable which is too tensioned or too loose so as to prevent safety accidents.

The invention discloses a decomposition equipment for crushed coal and pulverized coal, which comprises a horizontally sealed rotary kiln body with a material inlet and a material outlet, a heating mechanism is arranged on the kiln wall of the kiln body, and the heating mechanism is connected The pulverized coal and pulverized coal propulsion and decomposition channels formed between the walls of the kiln body, the coal decomposition gas collection pipes connected with the pulverized coal and pulverized coal promotion and decomposition channels are arranged on the kiln body, and the control part of the heating mechanism is set on the kiln wall Externally, the heating part is set inside the kiln wall. The control and detection part is set outside the kiln wall, and it is easy to accurately control the ignition effect and ignition state during the continuous contact with the flammable and explosive high-temperature coal decomposition gas. In addition, while better controlling the ignition quality and accuracy, the igniter, as a wearing part, is arranged outside the kiln wall for easy inspection and maintenance.

The invention discloses an unpowered recreation facility sliding protection device, which comprises a base and a slide structure. The base is fixed to the ground, a bearing structure is connected to the base in a sliding mode, and two damping structures are installed on the bearing structure. The slide structure is fixed to the ground, an adjusting structure is installed on the slide structure, and a rope is connected between the slide structure and the adjusting structure. A sitting plate is placed in the slide structure; a bearing structure comprises shifting blocks, the two shifting blocksare symmetrically welded to the bottom end face of the bearing base, and the head ends of the two shifting blocks are of a sharp structure. The head end of the shifting block makes contact with the head ends of the two elastic telescopic rods, and the head ends of the two elastic telescopic rods are each of an arc-shaped structure. The head end of the rope is connected with a poke rod B, the tailend of the rope is connected with a stop lever, and the rope passes through a belt wheel; when the sitting plate slides to the lowermost position of the slide main body, the sitting plate is in a limiting state, and at the moment, a poke rod B is also in a limiting state.

The invention discloses a safety protecting system of a cylindrical stacking AGV. The system comprises a frame 1, a lifting portal 2, a holding clamp 3, a draw cord encoder 4, a photoelectric sensor I5, a photoelectric sensor II 6 and a controller 7, wherein the draw cord encoder 4 is mounted on the frame 1, the photoelectric sensor I 5 and the photoelectric sensor II 6 are mounted below the holding clamp 3, the draw cord encoder 4 is used for measuring height of the holding clamp, the photoelectric sensor I 5 is used for detecting whether an object is available or not in front of the holdingclamp to prevent the stacking AGV in operation from colliding with cargoes. The system is convenient and simple and safe and reliable, and can prevent conditions that the cargoes collide with each other and the cargoes are emptied when the stacking AGV releases the cargoes effectively.

The invention provides an electricity-testing grounding lead hanger with a GPS (Global Position System) function, and a grounding measurement device, and relates to the technical field of grounding leads. The electricity-testing grounding lead hanger comprises an insulation rod, a pothook, an electricity testing device and a positioning device, wherein the pothook is connected to one end of the insulation rod; the insulation rod can be connected with a high-voltage power lead through the pothook; the electricity testing device is arranged at the connecting part of the pothook and the insulation rod, and is used for sensing the current on the high-voltage power lead; the positioning device comprises a GPS positioning assembly for collecting position information of the electricity-testing grounding lead hanger. According to the electricity-testing grounding lead hanger with the GPS function, and the grounding measurement device provided by the invention, the grounding lead hanger is connected with a distribution network frame, and meanwhile, the electricity-testing device is used for monitoring the voltage of a temporary grounding lead in real time, so that the life safety of a wiring worker is ensured; the grounding lead hanger reports the position information during wiring, and the wiring position of the grounding lead hanger is judged through comparing the reported informationwith pole tower position information collected in advance, so that the occurrence of safety incidents caused by fake electricity testing and fake grounding of unfulfillment in electricity testing andunfulfillment in grounding is avoided.

The invention discloses a rebound shell blocking method and device. The rebound shell blocking method comprises the following steps: monitoring a Bash process creation event; when the creation of theBash process is monitored, judging whether a redirection file corresponding to the Bash process is a socket file or not; if yesso, determining that the Bash process is a rebound shell process, and judging whether rebound shell network connection exists or not according to the a socket file descriptor; if soyes, it is confirmedconfirming that the server has a rebound shell attack, the accuracy of rebound shell detection is improved through combination of the server and the rebound shell attack, and the IP address and the port number of rebound shell network connection are obtained; c. Tomparedwith the prior art, the method has the advantages that the IP address and the port number are shielded, the Bash process is blocked, the IP address and the port number are shielded, the current Bash process is killed, the behavior that an attacker wants to perform authority extraction and vulnerability execution through a rebound shell can be terminated in time, and safety events are avoided.

The invention relates to a method and a device for detecting passenger density abnormity in a rail transit carriage, the method comprises an offline training step and a real-time online detection step, and the real-time online detection step specifically comprises the following steps: collecting image frame data in a monitoring video in the current carriage in real time, and preprocessing the image frame data; Inputting the preprocessed image frame data into an acquired image recognition model to detect the number of people, obtaining the number of current carriages at the current moment, andstoring the number of current carriages at the current moment; And obtaining the current number of carriages at the previous moment, and judging whether the passenger density in the current carriage is abnormal or not according to the current number of carriages at the previous moment and the current number of carriages at the current moment. The method can detect the situation that the number ofpassengers in the carriage is suddenly increased or decreased suddenly in real time, early warns safety events appearing in the carriage, and guarantees the safety of the passengers in the carriage.

The invention discloses an unmanned aerial vehicle city safety patrol inspection system. The system comprises a mobile bracelet, communication base points, a mobile terminal and a fixed terminal, wherein the mobile bracelet is carried by a user and used for sending a distress signal; the communication base points are distributed throughout a city, and used for receiving the distress signal of the mobile bracelet, generating an alarm signal and sending the alarm signal to the mobile terminal; and the mobile terminal comprises a data processor, and a positioning and navigation module, an aerial photographing processor, a voice system, a lighting system, a clock module, an alarm system and a wireless communication module which are connected with the data processor. The system provided by the invention has the advantages that through communication cooperation between the mobile bracelet, the communication base points, the mobile terminal and the fixed terminal, monitoring and remote alarming for an emergency situation can be carried out in the first place to draw the attention of people nearby, and criminal evidence can be preserved to improve the crime solving efficiency, so that city safety emergencies are effectively prevented, life and property safety of the public is guaranteed, the social order is maintained, and broad market prospects are achieved.

The invention discloses a multifunctional baton gun with automatic five-bullet firing. The baton gun comprises a electrical percussion circuit, a gun shell, a functional switch, and a trigger, wherein a screwed connection shell docking seat (1) is provided at the front end of gun shell, a base (5) is tightly connected at the upper part of the gun shell, a screwed connection shell (8) is arranged on the screwed connection shell docking seat (1) in dismountable manner, the screwed connection shell (8) is integrally formed by five cylindrical bodies that are uniformly distributed at the peripheral direction, a mounting hole (13) is provided in the screwed connection shell (8), the screwed connection shell (8) is covered into a negative electroshock head (4) at the lower end of the screwed connection shell docking seat (1) via the mounting hole (13), and a locating piece (11) at the periphery is matting with a groove (6) at the front end of the base (5) for location. By the structure, the invention realizes automatic five-bullet firing and shooting with different bullet, so as to effectively assure public security, and improve the work efficiency of security administration.

The invention discloses a control system capable of preventing a child from driving a vehicle and a working method of the control system and relates to the field of vehicle control systems. The vehicle comprises a steering gear, a gear box, an electronic handbrake and front windshield and is characterized in that a control system comprises a scanner, a processing center and a database, wherein the database is used for writing in, storing or exporting standard data; the scanner is fixedly connected on the inner side of the front windshield, faces the main driving position and is used for scanning a human face and generating human face data; the steering gear, the gear box, the electronic brake, the scanner and the database communicate with the processing center, and the steering gear, the gear box and the electronic handbrake are controlled through the processing center to be unlocked or locked, and standard data in the database are retrieved through the processing center and compared with the human face data in the scanner for judgment. The control system has the characteristics of clear logics, good use effect and high reliability on the whole.

The invention relates to a power network security research and judgment system which comprises an access source management module, an application management module, a data management module, a risk research and judgment module, a comprehensive display module and a user management module. The data management module carries out unified data analysis, the risk research and judgment module sets risk rules and carries out automatic research and judgment, the comprehensive display module carries out safety risk statistical display, and the power network safety research and judgment method is provided on the basis. According to the method, plug-ins do not need to be installed on the network application, the current risk condition of the network application can be quickly mastered, the problems of high false alarm rate, risk problem omission and the like existing in a single data source are solved, the risk identification accuracy can be effectively improved, and the system operation and maintenance safety is improved.

The paper cutting device includes: a lower frame configured such that a platen roller and a thermal head are disposed on the top surface thereof and provide a paper movement path and a drive unit is contained therein; an upper frame configured to form the paper movement path in association with the lower frame, and to open the paper movement path; a fixed cutter configured to be disposed on the upper frame, and to cut the roll paper; a movable cutter configured to be disposed on the lower frame, to cut the roll paper, and to allow the roll paper to move; and a jam control unit configured to detect a jam of the roll paper, and to detect the opening of the paper movement path and lower the movable cutter.

The invention provides a pole climbing foot fastener treading-down glove alarm. Foot fasteners and gloves are connected by wires. An acousto-optic alarm is mounted on each glove. Each foot fastener is connected with an upper foot fastener pedal and a lower foot fastener pedal through connectors, the upper part of the lower foot fastener pedal is equipped with a pressure switch, and the inside of the upper foot fastener pedal is equipped with batteries. An alarm is issued if the foot fasteners are treaded down, no alarm is issued if the foot fasteners are not treaded down, so that whether the foot fasteners are treaded down can be judged, and the occurrence of safety accidents due to the fact that the foot fasteners are not treaded down is prevented. The pole climbing foot fastener treading-down glove alarm has the advantages of being simple in structure, practical and convenient, and safe and reliable, and is suitable to be used as a safety tool for electricians to climb poles in the power field.

The invention aims to provide a door machine left slow door slide plate assembly, and particularly relates to an elevator quick and slow door safety linkage structure and a safety system correspondingthe elevator quick and slow door safety linkage structure. The linkage structure is arranged between an elevator quick door and an elevator slow door, and accordingly, the situation that safety accidents occur due to the fact that the slow door is opened when the quick door is not opened is avoided. According to the door machine left slow door slide plate assembly, faults caused by door closing and faults during power operation are not prone to occurring, in addition, passengers determine a stepped pulley door, a platform and a lift car according to the switch position of the lift car, LED lamps are installed on the bottom face of an entrance of the lift car and can be turned on and off, thus, elevator using safety accidents can be prevented, and the aesthetic feeling is realized.

The embodiment of the invention provides a security protection method and device for a mobile terminal. The method comprises the steps that the current moving speed of the mobile terminal is acquired;whether or not the moving speed is slower than or equal to the preset waling state speed is judged; if the moving speed is slower than or equal to the preset waling state speed, whether or not the current location of the mobile terminal is located at an intersection or a traffic light intersection is judged to determine whether or not a security protection mode of the mobile terminal is activated; if the current location of the mobile terminal is located at the intersection or the traffic light intersection, the security protection mode of the mobile terminal is activated; and otherwise, thesecurity protection mode of the mobile terminal is not activated. According to the method and device, when a user is in a walking state and enters a dangerous area, the user can be prompted to use themobile terminal securely, and therefore many security incidents can be avoided.

The invention relates to a spring lock and a vehicle using the spring lock. The spring lock comprises a lock base, a spring bolt and a self-locking spring used for keeping the spring bolt at an unlocking position or a locking position. The spring bolt comprises a lock hook used for being matched with a lock catch on a vehicle body framework in a locking mode and a crank arm connected with the self-locking spring through a pin shaft. The spring bolt is assembled on the lock base in a swinging mode through a hinge shaft arranged at the joint of the lock hook and the crank arm, the spring lock further comprises a locking rod which is movably arranged in the direction parallel to the axis of the pin shaft, and the locking rod is provided with a blocking position matched with the spring bolt ina blocking mode to prevent the spring bolt from moving towards the unlocking position and a receding position matched with the spring bolt in a blocking mode. The spring lock further comprises an elastic piece for driving the locking rod to move towards the blocking position, and when the spring bolt is located at the unlocking position, the locking rod can elastically abut against the connectinglever and / or the pin shaft under the action of the elastic piece. The vehicle comprises a front overhead door, and the spring lock is arranged on the front overhead door. According to the technical scheme, the opening risk caused by opening of the front overhead door in the running process of the vehicle is avoided.

The invention relates to the technical field of communication. The invention discloses a public place personnel management system and method, and the method comprises the steps: receiving the user personal information of a specific public area sent by an information collection terminal, enabling a radio frequency reader-writer to read the user personal information from a radio frequency intelligent card carried by a user in the specific public area, and providing the user personal information for the information collection terminal; Determining whether the sum of the personal danger values inthe user personal information of the specific public area reaches a preset threshold or not; And if the danger information reaches the preset threshold value, prompting the danger information, and processing the danger information by the working personnel after obtaining the danger information, thereby solving the technical problem that the dynamic information of the personnel in the public placecannot be effectively mastered and controlled at present, and avoiding the occurrence of public place safety events.

Embodiments of the invention provide a shellcode detection method and device. The method comprises the following steps of: obtaining instruction information of a to-be-detected shellcode; generating feature data of the to-be-detected shell code by adoption of the instruction information; respectively calculating a similarity between the to-be-detected shellcode and each shellcode category in a preset shellcode sample library according to the feature data; and determining a category of the to-be-detected shellcode according to the similarity, so as to deploy a corresponding preventive measure for the shellcode and then avoid the occurrence of safety accidents. According to the method and device, codes of the to-be-detected shellcode do not need to be executed line by line, and safety experts do not need to pre-define feature sequences, so that the consumption of resources such as human cost and the like is decreased and the shellcode detection efficiency is improved.