Abstract: An object of the present invention is to provide a control device and control method that make it possible to perform an inter-device authentication process more certainly and improve security. Provided is a control device including: a control section configured to control an authentication process of performing a process related to device authentication together with at least one communication device on a basis of information included in a signal received through wireless communication with the communication device. The control section performs control in such a manner that authentication information is changed for each process group in which the authentication process is repeated more than once, the authentication information being information to be used for the authentication process.

Abstract: A delay circuit is coupled to a memory device. At least a portion of the delay circuit is disposed in one or more memory banks on one or more memory chips of the memory device. The delay circuit is configured to calibrate an asynchronous signal received at each of the one or more memory banks so that the calibrated asynchronous signal has a common timing relationship with a respective internal command signal received at the corresponding memory bank for all of the one or more memory banks on the memory device. The calibrated asynchronous signals are used in various internal test operations to improve testing accuracy.

Abstract: A method and User Equipment (UE) for estimating locations of obstacles to signal transmission in a wireless communication network is disclosed. The method involves at the UE in communication with the network, in response to receiving a reference signal from a neighboring node via a non-line-of-sight (NLoS) transmission, transmitting an identification of the neighboring node to network equipment implementing the wireless communications network to facilitate estimating locations of the obstacles to signal transmission based on estimates of the location of the UE and the neighboring node.

Abstract: Methods, apparatus, and systems related to light detection and ranging (LIDAR) are described. In one example aspect, a LIDAR apparatus includes a light emitter configured to generate, according to a first electrical pulse signal, a pulse light signal. The first electrical pulse signal comprises a first set of non-uniformly spaced pulses. The apparatus includes a receiver configured to convert returned light signals from the object into electrical signals and a filtering subsystem in communication with the receiver, configured to receive the electrical signals from the receiver and remove a point from a set of points representing at least a partial surface of the object as noise by determining whether there is a coherence between the point and corresponding neighboring points of the point along at least a first direction and a second direction of the set of points.

Abstract: A method, a system and computer program product for monitoring, especially pre-fire monitoring, a course of work in a specific location of work within a facility using at least one radio beacon (IB, IB1, IB2, IB3) used to send signals to at least one mobile device (UE1, UE2, UE3) connected to a server (S) via a communication network (N) according to the invention involves placing said at least one radio beacon (IB, IB1, IB2, IB3) near the location of work.

Abstract: The invention relates to a product pallet (10) comprising an autonomous module (20), which has a smartphone-seeking module (24), by which the presence of smartphones in the vicinity of the product pallet (10) can be detected, and a transmission module (22), by which data can be transferred over a data network. The invention also relates to a method for establishing the position of a product pallet (10) in a shop, wherein, in a first step, a module (20) provided on a product pallet (10) detects which smartphones are located in the vicinity of the product pallet (10), and, in a second step, a decision is made in an automated manner as to whether the product pallet (10) is located on a shop floor of a shop or in the shop stockroom depending on the number of detected smartphones.

Abstract: Techniques for calculating a location of a position consumer device is disclosed. In one example, a network server may create a fingerprint map from reference data points. Each of the reference data points may include a recorded geo-location of a position source device and signal measurements taken at that recorded geo-location. By initially estimating an initial position of the position consumer device, the network server may apply one or more threshold values to filter reference data points—candidates for interpolation. The network server may then perform an interpolation on one or more pairs of reference data points to find a pair of reference data points that is collinear with the estimated position of the position consumer device. The location of the position consumer device may then be calculated based upon geo-locations of position source devices that are associated with collinear reference data points.

Abstract: A method determining a timing of an uplink signal includes receiving timing information associated with an uplink signal and a numerology of the uplink signal, wherein the timing information is used to determine a reference time of the uplink signal received from a user equipment (UE), receiving, from the UE, the uplink signal, wherein the receiving is in accordance with the timing information and the numerology of the uplink signal, and measuring an uplink relative time of arrival in accordance with the received uplink signal and the reference time of the uplink signal.

Abstract: Systems and methods are provided that may be implemented to use angle of arrival (AoA) of a signal transmitted between two Bluetooth Low Energy (BLE) wireless devices to initially authenticate a connection between the two BLE devices. In one example, bonding or pairing with a first BLE device may be restricted to only those other BLE devices having an antenna currently positioned to transmit a signal to the first BLE device from an allowed direction and within a predefined permitted range of AoA relative to the first BLE device.

Abstract: The present invention relates to a method for determining a position of a first device with respect to a second device. According to the method, control data indicative of a receive property of at least one signal received from the first device (110) by a second device (121-124) using a plurality of receiver chains (210-215) is established. At least one receive characteristic of the plurality of receiver chains (210-215) differs for at least two receiver chains of the plurality of receiver chains (210-215). Based on the control data, positioning information for the first device (110) is determined.

Abstract: The disclosure describes a real-time location system for tracking assets at a site. The system includes one or more tracking tags for carrying by or on the assets, one or more locating device nodes and a processing application. Each tracking tag includes a short-range radio frequency signal transmitter configured to transmit a beacon signal with unique identification information of the tracking tag. Each locating device node includes a signal receiver configured to receive the beacon signals at a received signal strength and a long-range radio frequency transmitter configured to transmit, using a spread spectrum, long-range modulation over a wide area network, locating signals including the unique identification information of the tracking tag and a received signal strength indicator representing the received signal strength. The processing application is configured to associate tracking tags and locating device nodes based upon the received signal strength indicator.

Abstract: Disclosed is a system and method to route a call from a roaming UE on a 5G network. The system receives from a UE belonging to a home network an indication of a call to a dialed number. The call requires information associated with the UE that is not available to the first wireless telecommunication network, because the UE is roaming on a visitor network. The indication of the call includes a unique identifier of the visitor network. The system can determine based on the unique identifier that the UE is roaming and send a request to the visitor network to provide instructions on how to route the received call. Upon obtaining the instructions on how to route the received call, the system routes the received call.

Abstract: The present disclosure optimally determines a contact between a user and an advertisement. An advertisement contact determination system according to one aspect of the present disclosure includes a communication unit configured to obtain position information of a device, and a control unit configured to determine that a user of the device has come into contact with an Out Of Home (OOH) advertisement if the OOH advertisement is included in a certain range in a traveling direction of the user based on the position information of the device. The communication unit obtains a log of a certain apparatus, and the control unit determines whether the device exists in vicinity of the certain apparatus in a certain period of time or not and, if the device exists, associates the log of the certain apparatus in the certain period of time with the device.

Abstract: A method of controlling a mobile platform includes measuring a distance between the mobile platform and an object when the mobile platform is located at each of a plurality of positions to obtain a plurality of measured distances each being obtained at one of the plurality of positions. Location information of the plurality of positions of the mobile platform is obtained by an inertial measurement unit (IMU) on the mobile platform. The at least two distance sensors being configured to capture data from different directions. The method further includes determining a position of the object based on the plurality of measured distances and the location information and controlling the mobile platform to avoid the object based on the results of the determined position of the object.

Abstract: Techniques for position estimation using uplink (UL) and downlink (DL) signals via a fully or partially reciprocal wireless channel between a User Equipment (UE) and terrestrial transceiver can be enhanced by leveraging information obtained from UL or DL signals having the stronger Signal-to-Noise Ratio (SNR). This information can include the number of paths and/or complex sinusoids, and can be shared with the base station or location server to parameterize the model of the wireless channel. In some embodiments, the UE can further determine a quality metric for the model and send it to the location server or terrestrial transceiver.

Abstract: A terminal (1050) includes a light receiver (151) that receives a light signal emitted by an apparatus (1000), the light signal including an identifier (SSID) of at least one base station (470); a receiver (153) that performs a reception process on the received light signal to output reception data; a data analyzer (155) that selects one base station based on the identifier of the at least one base station that is included in the reception data; and a radio device (453) that establishes a wireless connection with the selected base station (470) by using the identifier of the base station (470) and wirelessly communicates with the base station (470).

Abstract: An icon can be created for a contact (e.g., an individual(s) or an entity) and presented on a user interface of a mobile device, such as a “home screen.” The icon can be used to retrieve and display contact information. The icon can also be used to invoke one or more applications that are personalized to the contact. The icon can be modified to display information related to the contact. In one aspect, an icon associated with an entity can be temporarily displayed on the mobile device based on the proximity of the mobile device to the entity. The icon can be used to retrieve and display information related to the entity. Additionally, the icon can be removed from the display on the mobile device when the mobile device is no longer within a certain proximity of the entity.

Abstract: Systems and methods for charging electric vehicles that define a charging schedule for an electric vehicle based on one or more charging preferences of an operator of the vehicle and based on at least one current value of a dynamic attribute of an electric charge provider. Such systems and methods may include a graphical user interface adapted to display a unitary vehicle charge indicator element having (i) a first portion indicative of an amount of charge residing in a battery of the electric vehicle, (ii) a second portion indicative of an uncharged capacity of the battery of the electric vehicle, and (iii) a third portion comprising a slider by which an amount of charge may be specified.

Abstract: A bit interleaver, a bit-interleaved coded modulation (BICM) device and a bit interleaving method are disclosed herein. The bit interleaver includes a first memory, a processor, and a second memory. The first memory stores a low-density parity check (LDPC) codeword having a length of 16200 and a code rate of 2/15. The processor generates an interleaved codeword by interleaving the LDPC codeword on a bit group basis. The size of the bit group corresponds to a parallel factor of the LDPC codeword. The second memory provides the interleaved codeword to a modulator for 256-symbol mapping.

Abstract: A bit interleaver, a bit-interleaved coded modulation (BICM) device and a bit interleaving method are disclosed herein. The bit interleaver includes a first memory, a processor, and a second memory. The first memory stores a low-density parity check (LDPC) codeword having a length of 64800 and a code rate of 3/15. The processor generates an interleaved codeword by interleaving the LDPC codeword on a bit group basis. The size of the bit group corresponds to a parallel factor of the LDPC codeword. The second memory provides the interleaved codeword to a modulator for 256-symbol mapping.

Abstract: The present invention is a radio communication system having quality measurement means configured to execute quality measurement related to a service quality in communication between a radio terminal and a radio station, and information collection means configured to collect information related to a location of the radio terminal to be a target for the quality measurement, the radio communication system comprising: means configured to associate the information related to the location of the radio terminal when a predetermined condition is satisfied in an execution period of the quality measurement with results of the quality measurement.

Abstract: A phone case with a liquid vessel contained therein for emitting a spray, such as a spray for self-defense or any other practical use, includes a case body extending from a first end to a second end, the case body to secure to a phone; a cavity disposed between an interior surface and an exterior surface of the case body; a button extending through a first opening of the case body and into the cavity; a nozzle extending through a second opening of the case body and into the cavity; and a vessel mounted within the cavity and engaged with the button and in fluid communication with the nozzle; activation of the button activates spray from the vessel through the nozzle.

Abstract: A network device (ND) includes packet processing circuitry and performance optimization circuitry. The packet processing circuitry is connected to a network and is configured to process communication packets for communicating over the network. The packet processing circuitry includes a plurality of configuration registers for setting one or more operation parameters of the ND. The performance optimization circuitry is configured to improve a performance measure of the ND by iteratively calculating the performance measure and adjusting values of one or more of the configuration registers based on the performance measure.

Abstract: A method of transmitting and receiving a signal by a serving base station (BS) in a wireless communication system is disclosed. The method includes receiving, from a user equipment (UE), an uplink (UL) signal including a cell identifier (ID) of a first BS transmitting a downlink (DL) signal to the UE, determining whether the cell ID of the first BS is identical to a cell ID of the serving BS, transmitting a DL signal to the UE based on the cell ID of the first BS being identical to the cell ID of the serving BS, and transmitting information on the UL signal to the first BS based on the cell ID of the first BS being different from the cell ID of the serving BS. The UE supports full-duplex radio, and the UL signal includes a feedback for a DL signal transmitted by the first BS.

Abstract: Disclosed in the present disclosure is a paging processing method, a network device, a user equipment (UE), and a computer storage medium. The method comprises: obtaining a terminal type of a UE, and cell identifier information or base station identifier information corresponding to the position of the UE; and if the terminal type of the UE is a static type, determining a paging range for the UE on the basis of the cell identifier information or base station identifier information corresponding to the position of the UE.

Abstract: This disclosure relates to techniques for supporting narrowband device-to-device wireless communication, including possible techniques for performing discovery in an off grid radio system. A wireless device may obtain synchronization with a peer-to-peer communication group. The wireless device may determine the location of the wireless device within the peer-to-peer communication group based at least in part on signal strength of a synchronization signal used to obtain the synchronization. The wireless device may perform peer-to-peer discovery in the peer-to-peer communication group, such that time and frequency resources used by the wireless device to perform the peer-to-peer discovery are determined based at least in part on the location of the first wireless device within the peer-to-peer communication group.

Abstract: A method comprises receiving an area of interest (AOI) selection. The method further comprises accessing an AOI device location data for the AOI, the AOI device location data indicating locations of devices over time received within the AOI. The AOI device location data is filtered to only include the device location data that match one or more characteristics. A proximity zone is determined for the for the AOI that includes the area of the AOI. A zone device location data for the proximity zone is determined, which indicates locations of devices over time reported within the proximity zone. The method further comprises normalizing the filtered AOI device location data by computing a ratio of the filtered AOI device location data and the zone device location data to generate an AOI user estimate, and transmitting the AOI user estimate to a client device of a requestor.

Abstract: Systems and methods for wireless location are disclosed. In one aspect, a method for wireless location includes collecting signal strength values from one or more nodes (e.g., mobile devices) in an area over a time interval. The nodes receive wireless signals from one or more other transmitting nodes, where the signal strength values are representative of the signal strengths of the wireless signals. The method further includes normalizing the collected signal strength values and evaluating respective locations within the area of the nodes based on the normalized signal strength values. In a further aspect, the evaluated locations of the nodes may be used to execute an automated light show over the area, by instructing the nodes to display certain color or pattern at their locations in the area.

Abstract: Systems and methods for identifying automotive parts in a salvage yard are provided. In particular, some embodiments include graphical user interfaces and backend systems that allow users to engage in remote inquiries of available automotive parts in salvage yard and perform a market analysis of those parts. A user makes a request for a type of recyclable assembly by providing the code associated with the parameters of the parts. The code is then compared to a recyclable part database that includes parts from several salvage yards. When a part is identified as being in a particular salvage yard, the user is notified of the location and is connected with on-site parts pullers. This is facilitated through geofencing and location aware sensors. Moreover, the user is provided with a market analysis to indicate the demand for the parts.

Abstract: Embodiments are directed towards providing 5G zero touch traffic management of cells in a network. A target cell associated with a network objective is identified. One or more neighbor cells are also identified. Transmit power and tilt capabilities of the target cell are determined. An interference between the target cell and the one or more neighbor cells is also determined. An electrical antenna tilt adjustment or a transmit power adjustment is determined for the target cell to apply based on the transmit power capabilities, the tilt capabilities, the interference, and the network objective. The determined electrical antenna tilt adjustment or the determined transmit power adjustment are then provided to the target cell. If the network objective is met after the target cell applies the electrical antenna tilt adjustment or the determined transmit power adjustment, then the changes are confirmed, otherwise they are reversed.

Abstract: For controlling an HVAC component (3), a physical identifier object (5) associated with the HVAC component (3) is arranged in an area (41) with access to a wireless network (6) and at a location distant and separated from the HVAC component (3). Identifier information is obtained from the physical identifier object (5) by a mobile communication device (1) and transmitted via the wireless network (6) to a remote computer system (2). The remote computer system (2) returns HVAC component data linked to the identifier information. The mobile communication device (1) uses the component data for generating a user interface (100) for an HVAC virtual room unit for controlling the HVAC component (3). User commands received via the user interface (100) are transmitted by the mobile communication device (1) via the remote computer system (2) to the HVAC component (3) for controlling the HVAC component (3).

Abstract: Disclosed is a positioning system. The positioning system includes a positioning signal generation server and a positioning station. The positioning signal generation server is configured to generate a time domain positioning oversampled signal according to a positioning signal parameter and send the time domain positioning oversampled signal to the positioning station. The positioning station is configured to receive the time domain positioning oversampled signal generated by the positioning signal generation server and send the time domain positioning oversampled signal according to sending time information of a positioning signal. Further provided are a positioning signal generation and sending method and a storage medium.

Abstract: A vehicle entry system that comprises a portable terminal and an onboard device that wirelessly communicates with the portable terminal. The onboard device has: a door opening and closing unit that can lock a vehicle door in a closed state and open the vehicle door to a prescribed angle; and an onboard control unit that, on the basis of commands from a portable terminal, controls a vehicle drive system and the door opening and closing unit. The portable terminal has a touch panel and a terminal control unit that outputs commands to the onboard control unit. A plurality of icons on the touch panel include an advance-and-open-door icon to advance to a location at which the door can open and, after advancing, to open the door; and a reverse-and-open-door icon to reverse to a location at which the door can open and, after reversing, to open the door.

Abstract: A method and apparatus for providing a warning about a suspect vehicle is provided. During operation automatic-license-plate-reading (ALPR) circuitry will scan a license plate and determine a current location of an owner of a vehicle. If the current location of the owner of the vehicle, and a current location of the vehicle differ, a warning is provided to the user of the ALPR circuitry. In an alternate embodiment, if the current location of all individuals who reside with the owner of the vehicle, and a current location of the vehicle differ, a warning is provided to the user of the ALPR circuitry.

Abstract: A user device parses system information block data, received from a first cell, to identify an upper layer indicator element, and determines, based on the upper layer indicator element, that the user device is in an EN-DC area. The user device causes, based on determining that the user device is in the EN-DC area, first display of a first indicator on a display of the user device, and sends a request to the first cell for a data connection. The user device receives, from the first cell, a message that indicates a second cell will initiate the data connection via a 5G NR millimeter wave connection. The user device causes, based on the message, display of a second indicator on the display of the user device for a threshold amount of time, and then causes second display of the first indicator on the display of the user device.

Abstract: One example cloud-based electronic computing device includes and electronic processor and communicates over a wireless communication network with a User Equipment (UE) device. The electronic processor receives public safety incident information about a public safety incident from a public safety command center. The electronic processor receives metadata representing first gathered data from a location of the public safety incident from the UE device. The electronic processor may determine, based on the public safety incident information and the metadata, whether to process the first gathered data by a first UE device at the location of the public safety incident or by the electronic processor of the cloud-based electronic computing device.

Abstract: Apparatuses and methods in a communication system are provided. A method comprises: maintaining in a terminal more than one subscription identities and controlling by the user terminal transmission of a message comprising information that the terminal maintains more than one subscription identities.

Abstract: A property tour management system automatically manages creation, real-time facilitation, and analytics associated with property tours. The system includes various portals to provide access to information and performance of functions useful to agents, buyers, and real-estate organizations relating to a property tour experience. The system enables all parties involved to gain a more efficient, more informational, and more enjoyable property tour experience.

Abstract: A solution for providing differentiated positioning services in a wireless communication system is provided. For example, a method to be performed by a wireless device is provided, which includes requesting a high accuracy positioning information from the network, e.g. from a network node. The method further includes obtaining information from the network in response to the request, which is valid for a predefined period of time, and which enables the wireless device to obtain the high accuracy positioning information during the predefined period of time. The method further includes performing positioning or assisting performance of positioning based on the obtained high accuracy positioning information.

Abstract: A device detection system is configured to determine whether a device is located within a venue. The device detection system provides user identifiers associated with a device to an anonymization server. The anonymization server provides anonymous identifiers to the device detection system corresponding to the user identifiers. A content distribution system provides content items for a campaign associated with the venue to users. The content distribution system provides user identifiers to the anonymization server and receives anonymous identifiers from the anonymization server. The content distribution system provides the anonymous identifiers to the device detection system. The device detection system compares the sets of anonymous identifiers to identify users that received a content item and subsequently visited the venue.

Abstract: In a 6G network, microservices can be utilized in the absence of a core network. For example, after a mobile device has authenticated, when the mobile device moves away from mobile edge computing (MEC) coverage, the information from the MEC can be ported to a new MEC along the way of the mobile device's path. The initial MEC can send service related application package data to one or more neighboring MECs. When a neighboring MEC of the neighboring MECs receives the service related application package data and the neighboring MEC serves the area which the mobile device is transitioning to, then the neighboring MEC can send an acknowledgment back to the initial MEC. Once the acknowledgment is received by the initial MEC, the initial MEC can complete the handover of the application data needed to reduce or mitigate any disruption in service for the mobile device.

Abstract: A system comprises a computer including a processor. The processor receives from each of a plurality of vehicles within a region, a respective plurality of messages and identifies for each of the plurality of vehicles, a respective communications discontinuity during which an expected message fails to be received from the respective vehicle. The processor determines, for each communications discontinuity, discontinuity edge locations at each of a beginning of the communications discontinuity and an end of the communications discontinuity. The processor further determines an interference node location based on the discontinuity edge locations.

Abstract: Radio link coverage mapping systems and related techniques are provided to improve the operation of unmanned mobile sensor or survey platforms. A radio or communication link coverage mapping system includes a logic device configured to communicate with a communication module and a position sensor coupled to a mobile platform, where the communication module is configured to establish a wireless communication link with a base station associated with the mobile platform and the position sensor is configured to provide a position of the mobile platform as it maneuvers within a survey area. The logic device determines communication link quality data associated with the wireless communication link as the mobile platform maneuvers within the survey area, receives corresponding position data, and generates corresponding communication coverage information, which may be used to generate a radio link coverage map.

Abstract: Embodiments described herein provide for the granular network-based detection of UE location in a RAN that includes one or more mobile base stations using quantum computing. Mobile base stations may be, for example, affixed on vehicles (e.g., cars, trucks, drones, etc.), may be implemented by other UEs, and/or may otherwise be non-stationary. In contrast, fixed base stations may be mounted to towers, buildings, or other types of permanent or semi-permanent installations. Quantum computing techniques, as described herein, may aid in the precise determination of UE location using triangulation techniques and/or other network-based location techniques. Further, in RANs that include mobile base stations, the locations of both the UE and a reference point may change relatively rapidly. The use of quantum computing, as described herein, may aid in the fast and precise determination of UE location in situations where mobile base stations and/or UEs are moving rapidly.

Abstract: Systems, methods, and program products for providing services to a user by a mobile device based on the user's daily routine of movement. The mobile device determines whether a location cluster indicates a significant location for the user based on one or more hints that indicate an interest of the user in locations in the cluster. The mobile device can perform adaptive clustering to determine a size of area of the significant location based on how multiple locations converge in the location cluster. The mobile device can provide location-based services for calendar items, including predicting a time of arrival at an estimated location of a calendar item. The mobile device can provide various services related to a location of the mobile device or a significant location of the user through an application programming interface (API).

Abstract: Method for providing positioning data in a positioning node of a radio network, which positioning data is associated with a mobile device including a radio unit, the method comprising the steps of establishing a radio session for receiving positioning data in the positioning node from the radio unit; transmitting report control data to the radio unit, wherein the report control data identifies a request to report positioning data obtained in the device, wherein said positioning data includes inertial measurement data; and receiving positioning data from the radio unit in accordance with the report control data.

Abstract: Sensor assisted beam management system and methods for mobile User Equipment (UEs) are disclosed. An embedded rotation sensor may be used to determine orientation, rotating direction and angular speed of the UE. A speed sensor and GPS may also be used to determine location, moving direction and speed of the UE. The sensor outputs may be used by the UE to efficiently select UE beams after movement or to predict when a UE beam should be updated. Beam search and measurement periodicities may also be updated based on UE movements reported by the sensors.

Abstract: A measuring method executes an identifying procedure of measuring signal power of a beam from user equipment supporting beam-formed transmission, identifying a measurement antenna that detects a peak of the beam transmitted from the user equipment; a calculating procedure of calculating a first angle formed between a straight line connecting the measurement antenna detecting the peak of the beam transmitted from the user equipment to the user equipment and a straight line connecting a measurement antenna located in a direction of an azimuth angle rotation axis of the user equipment to the user equipment; and a rotating procedure of rotating the user equipment based on the first angle.

Abstract: Systems and methods are provided that may be implemented to use angle of arrival (AoA) of a signal transmitted between two Bluetooth Low Energy (BLE) wireless devices to initially authenticate a connection between the two BLE devices. In one example, bonding or pairing with a first BLE device may be restricted to only those other BLE devices having an antenna currently positioned to transmit a signal to the first BLE device from an allowed direction and within a predefined permitted range of AoA relative to the first BLE device.

Abstract: In various aspects, a system that comprises requesting a positioning measurement data set from one or more network node devices; receiving the positioning measurement data set from the one or more network node devices; in response the receiving the positioning measurement data set, determining a time of arrival value for each positioning measurement data of the positioning measurement data set; generating a positioning measurement report comprising a group of positioning measurement report elements determined as having fulfilled a predetermined criterion; and transmitting the positioning measurement report, wherein the positioning measurement report comprises a first portion and a second portion.