Abstract: The technology disclosed herein provides a system for generating a personal unclonable function (PUF) for a user based on a biometric data related to the user. Implementations of the system include a camera to generate a partial image of a user's tongue, a sensor to generate a moisture level in the user's saliva, a PUF generator configured to generate a PUF benchmark of the user based on combination of the partial image of a user's tongue and the moisture level in the user's saliva, and an access control unit configured to control access to one or more user devices based on the PUF benchmark.

Abstract: A hard disk assembly (HDAs) that include a tuning data memory at least including tuning data regarding the HDA. The HDAs may lack an internal disk controller, but rather may communicate the tuning data and/or other HDA-specific data (e.g., firmware, certification data, etc.) to a reader device comprising a disk controller. In this regard, the reader device may coordinate with the HDA once the tuning data is received to operate the HDA to perform TO commands in response to commands received at the reader device from a host. In turn, upon failure of an HDA, a new HDA may be swapped into place to communicate with the reader device. Because the HDAs may lack onboard disk controllers, the cost and complexity of each HDA may be reduced.

Abstract: A load/unload ramp includes a body with ramps, load/unload surfaces, and a vertical wall. The ramps include outer grooves positioned between the ramps. The load/unload surfaces extend from the respective ramps. The vertical wall includes channels extending through the vertical wall. In embodiments, the channels are positioned between the load/unload surfaces.

Abstract: A heat-assisted magnetic recording device includes a write pole positionable adjacent a magnetic recording medium and configured to write data to the medium. A near-field transducer is situated proximate the write pole and configured to produce a thermal spot on the medium. A channel circuit is configured to generate a sequence of symbols having a length of nT, where T is a channel clock rate and n is an integer over a predetermined range. A write driver is configured to apply bi-directional write currents to the write pole to record the sequence of symbols at a location of the thermal spot on the medium, wherein a duration of applying the write currents to the write pole by the write driver is dependent on a length of the sequence of symbols and the effective thermal spot size.

Abstract: An apparatus comprises a write pole for writing data to a magnetic recording medium and a near-field transducer (NFT) optically coupled to a laser source and configured to produce a thermal spot on the medium. A laser driver applies laser operation power (Iop) to the laser source. A channel circuit generates symbols having a length of nT, where T is a channel clock rate and n is an integer. The laser driver applies Iop to the laser source and a write driver applies bi-directional write currents to the write pole to record the symbols at a location of the thermal spot on the medium, wherein a duration of applying Iop to the laser source by the laser driver is dependent on a length of the symbols and the effective thermal spot size.

Abstract: A data storage system can connect a cache memory to a caching module, a host, and a data storage device. The caching module can employ one or more local controllers to generate a caching strategy in response to detected data storage operations and execute the caching strategy to divide the cache memory into a first pool having a first size and a second pool having a second size.

Abstract: A data storage system includes a logical space having logical block addresses (LBAs) divided into non-overlapping LBA ranges, and a physical space having pairs of physical bands. The system also includes a map in which first successive alternate LBAs of each different one of the non-overlapping LBA ranges are mapped to successive adjacent physical blocks of a first physical band of each different pair of the pairs of physical bands, and second successive alternate LBAs of each different one of the non-overlapping LBA ranges are mapped to successive adjacent physical blocks of a second physical band of each different pair of the pairs of physical bands. A controller employs the map to concurrently read data from a first physical block of the first physical band of one pair of physical bands and from a first physical block of the second physical band of the same pair of physical bands.

Abstract: A ring voltage controlled oscillator (VCO) circuit is herein provided. According to one embodiment, a ring VCO circuit includes a plurality of stages connected in series, wherein each stage includes a first inverter, a second inverter, a third inverter and a fourth inverter, the first inverter connected in parallel with the third and fourth inverters and the second inverter connected in parallel with the third and fourth inverters, and a first biasing resistor connected to a first node and coupled to an input of the first inverter. The first biasing resistor includes a first switch configured to set the first biasing resistor to about zero voltage.

Abstract: Provided are a method and apparatus for determining motor temperature, and a storage medium. The method includes: obtaining an electromagnetic loss of each node in ? nodes acquired by decomposing components of a motor, wherein the ? is a natural number greater than 1, and at least one component in the components of the motor is decomposed into multiple nodes in the ? nodes; obtaining a thermal resistance between every two nodes in the ? nodes; and determining a temperature of the motor based on the electromagnetic loss of the each node in the ? nodes and the thermal resistance between the every two nodes in the ? nodes.

Abstract: The present disclosure discloses a device for monitoring electrical equipment for electrical contact overheating, which comprises a gas collection device, a gas detection device, a data processing device, a data storage device and a display and early warning device. The present disclosure further discloses a method for monitoring electrical equipment for electrical contact overheating. The present disclosure can provide a basis for the evaluation and early warning of electrical contact overheating of electrical equipment based on the analysis of the thermally decomposed characteristic gases of the electrical joint compound, and has the characteristics of no space limitation, no need for a large number of layout points, high accuracy, simple structure and easy operation.

Abstract: A transceiver includes a first common T-coil circuit coupled to a first input-output pin of the transceiver, a termination impedance coupled to the first common T-coil circuit and configured to match an impedance of a transmission line coupled to the first common T-coil circuit, an amplifier configured to receive an input signal from the first input-output pin through the first common T-coil circuit based on a receive enable signal, and a first transmission buffer configured to transmit an output signal to the first input-output pin through the first common T-coil circuit based on a transmit enable signal.

Abstract: The disclosed technology provides a method that improves CCT in SMR device systems. In one implementation, the method comprises writing data to a shingled magnetic recording (SMR) band in a storage device, determining whether an off-track write has occurred, identifying unsafe written data in response to determining that an off-track write has occurred, determining whether caching space is available upon identifying unsafe written data, continue writing data to the SMR band without a write retry upon determining that caching space is available, and writing unsafe written data to the available caching space. In another implementation, the method comprises receiving a request to repair an encroached track in an SMR band, recovering encroached data to a dynamic random-access memory, determining whether caching space is available, writing the recovered data to the available caching space upon determining that caching space is available, and merging other cached data in the SMR band.

Abstract: An electrical connector includes an insulating body having a bottom wall, an accommodating cavity provided above the bottom wall, and two side walls at left and right sides of the accommodating cavity. Each side wall has a reserved slot running through the corresponding side wall in a left-right direction and in communication with the accommodating cavity. The insulating body has an oblique surface at a bottom portion of the reserved slot, which is provided obliquely downward and outward, and has an inner edge and an outer edge. The outer edge is lower than a top surface of the bottom wall. Each side wall is further concavely provided with multiple notches at front and back sides of the corresponding reserved slot. Each notch runs along the left-right direction and upward through the corresponding side wall. A lower edge of each notch is higher than the corresponding oblique surface.

Abstract: A torsional mode damping controller in which the controller modifies electrical power to an electrical motor to provide active damping control of torsional vibration in rotating masses. The controller receives a measurement of a rotational speed of the rotating masses ?m and an estimate or a measurement of a torque transmitted between the rotating masses Tsh; based on the received transmitted torque Tsh, generate a compensating torque to suppress vibration Tcom; based on the received rotational speed ?m and the compensating torque Tcom, generate an electromagnetic torque modification signal Tmodi; and modify the electrical power provided to the electrical motor on the basis of the electromagnetic torque modification signal Tmodi. The controller is further configured to generate compensating torque Tcom by applying a filter to the received transmitted torque Tsh, based on plural tunable parameters including a tuning gain K, a cut-off frequency ?n and a resonant damping ratio ?.

Abstract: An electronic device which includes a cover, a base coupled to the cover to create an enclosure, a conductive layer positioned between the cover and the base and arranged to reduce radiation from entering the enclosure, and a gasket positioned between the cover and the base to create a seal and positioned between the conductive layer and the enclosure.

Abstract: A hard disk drive includes a base deck and a load/unload ramp component. The base deck includes a floor and sidewalls. The load/unload ramp component is coupled to the floor of the base deck. At least one of the sidewalls includes an arcuate extension portion that extends to contact the load/unload ramp component.

Abstract: A hard disk drive includes a base deck and a load/unload ramp component. The base deck includes a floor and sidewalls. The load/unload ramp component is coupled to the floor of the base deck. At least one of the sidewalls includes an arcuate extension portion that extends to contact the load/unload ramp component.

Abstract: Measuring ramp friction in a disk drive including receiving a lift tab ramp load time profile for a voice coil motor and determining a load torque profile for a lift tab on the ramp based at least on the received ramp load time profile. The measuring also includes receiving a lift tab ramp unload time profile for the voice coil motor and determining an unload torque profile for the lift tab on the ramp based at least on the received ramp unload time profile. The measuring also includes calculating a ramp friction torque component based on the determined load torque profile and unload torque profile.

Abstract: A method for controlling a main circuit of a traction system is provided. The method includes: under a braking condition, controlling a protection module to be turned off; controlling the protection module to be turned on and monitoring a first current detected by a first current sensor in a case that a rail vehicle runs on a charged third rail; and controlling the protection module to be turned off and monitoring whether the rail vehicle runs on a charged third rail in a case that the first current is less than a first preset current.

Abstract: A hard disk drive includes a first actuator and a second actuator. The first actuator is coupled to a first slider, which includes a first read transducer and a first write transducer. Both the first read transducer and the first write transducer are positioned away from a first longitudinal centerline of the first slider. The second actuator is coupled to a second slider, which includes a second read transducer and a second write transducer. Both the second read transducer and the second write transducer are positioned away from a second longitudinal centerline of the second slider.