Abstract: A disc drive includes a data storage surface having a system data zone and a user data zone, and a head that communicates with the data storage surface. The disc drive also includes a control circuit communicatively coupled to the head. The control circuit is configured to, during power up initialization of the disc drive, apply a fly height control value to direct the head to fly at a first target fly height for reading system data from the system data zone. The first target fly height is substantially higher than a second target fly height for reading user data from the user data zone. The control circuit determines whether an actual fly height of the head is substantially equal to the first target fly height. The control circuit performs fly height correction when the actual fly height is not substantially equal to the first target fly height.

Abstract: The present disclosure provides a backlight module and a display apparatus. The backlight module of the present disclosure may connect at least one of the diffuser film, the lower anti-reflection film and the upper anti-reflection film with the middle frame so as to avoid the problems of drop-off or movement of the at least one of the diffuser film, the lower anti-reflection film and the upper anti-reflection film. Thus, the solidity and the stability of the at least one of the diffuser film, the lower anti-reflection film and the upper anti-reflection film may be improved. The problems of uneven light distribution due to drop-off and movement of the at least one of the diffuser film, the lower anti-reflection film and the upper anti-reflection film may be avoided.

Abstract: Systems and methods for tracking at least one entity. Systems according to various embodiments may include an interface for at least receiving training data representing movements of a plurality of training entities and a query regarding a test entity's movement, a memory, and at least one processor executing instructions stored on the memory to create a plurality of tracks, generate an index of the plurality of tracks, execute the received query, and output a feature value with respect to the test entity.

Abstract: Provided herein are compounds for use as photochromic molecular switches having very long thermal isomerization half-lives and switchable fluorescence properties both in solution and the solid state.

Abstract: A system comprises a five-level rectifier configured to be connected with an ac power source, wherein the five-level rectifier comprises a first boost apparatus and a first buck apparatus configured to operate in a first half cycle of the ac power source, and a second boost apparatus and a second buck apparatus configured to operate in a second half cycle of the ac power source and a five-level inverter connected to the five-level rectifier.

Abstract: Apparatus and method for reducing the effects of thermal asperities on a rotatable data recording surface. A data transducer writes user data to a first set of tracks at a first fly height above the recording surface. A compensation circuit detects a thermal asperity (TA) on the recording surface, and establishes a guard band as a second set of tracks that are co-radial with the TA. The second set of tracks are deallocated and removed from service. The compensation circuit further defines a reserve band as a third set of tracks immediately adjacent the guard band, and selects an increased, second fly height that allows the data transducer to write data to the reserve band without contacting the TA. The second set of tracks may have a greater track pitch than the first set of tracks to compensate for the greater fly height.

Abstract: Apparatuses and methods disclosed herein relate to detecting a signal generated by a spin torque oscillator (STO). The signal is outputted, wherein the signal includes a direct current (DC) component, a wide bandwidth noise component, and an STO oscillating radio frequency (RF) component. The signal is filtered, wherein the filtering removes the DC component and the STO oscillating RF component, leaving the wide bandwidth noise component. A value of the wide bandwidth noise component is converted into a binary value, and a bit from the binary value is selected and combined with another bit to form a random number.

Abstract: A system and technique for securing communications between endpoints in a local area network (LAN) includes receiving at a first endpoint in the LAN, a request from an application to connect to a second endpoint in the LAN. Approval from a controller to establish a Secure Socket Layer (SSL) tunnel to the second endpoint is requested. Upon receiving approval from the controller, the first endpoint receives from the controller a session identifier for the SSL tunnel. The controller also distributes a copy of the session identifier to the second endpoint. After receipt of the session identifier at the first endpoint, the session identifier is forwarded from the first endpoint to the second endpoint for security authorization, and the SSL tunnel is established. The SSL tunnel extends from the first endpoint in the LAN to the second endpoint in the LAN.

Abstract: A backlight module and a liquid crystal display device are provided. The backlight module includes a heat dissipation plate having a groove in which a first buffer block is formed; a light guide plate is arranged between the heat dissipation plate and a middle frame; the light guide plate includes a light incidence side; a light source is arranged facing the light incidence side of the light guide plate. The middle frame is disposed over the light guide plate and the light source. A quantum strip is inserted into the groove, with one end portion of the quantum strip being attached to the first buffer block.

Abstract: The present disclosure discloses an LLC resonant converter and a method for suppressing ripples in output voltage of the LLC resonant converter. The LLC resonant converter comprises: a half-bridge or full-bridge chopper having a driving circuit, an inductance-capacitance series resonant network coupled to the chopper, an isolation transformer coupled to the resonant network, and a rectification and filtering circuit coupled to the isolation transformer; a feedforward controller coupled to generate a feedforward signal based on an input voltage; and a controlled oscillator coupled to receive the feedforward signal from the feedforward controller and to control an operating frequency of the chopper via the driving circuit based on the feedforward signal. Thus, a feedforward correction is provided for the LLC resonant converter, so that ripples in a DC output voltage of the LLC resonant converter are reduced.

Abstract: The present invention discloses a display frame, comprising a main frame body and a front frame body, and a plurality of magnets are separately adhered at edges of the main frame body, and front frame body is connected with the main frame body with magnetic attractive forces among the front frame body and the plurality of magnets; the main frame body and the front frame body jointly enclosure a first storage cavity, and the main frame body comprises a backlight window right opposite to a position of the first storage cavity, and the front frame body comprises a display window right opposite to a position of the first storage cavity. The display frame of the present invention can quickly change the display panel. The present invention further discloses a display applied with the display frame.

Abstract: Cloud endpoints are secured using agents and a controller connected to the agents. A whitelist identifies components and processes of an authorized multi-tiered application for the cloud. An application profile for the application specifies valid computing flows between components of a tier and components of another tier, where components of the tier are executed at an endpoint and the other components of the other tier are executed at another endpoint. Endpoints are provisioned with static routing tables identifying at least one subnet destination. A request is received at a first endpoint to connect to a second endpoint. If the second endpoint falls within the at least one subnet destination, the controller performs one or more further security checks including checking the application profile flow, whitelist, and endpoint quarantine list. A network kernel table at an endpoint that includes the static routing table may be periodically checked to detect tampering.

Abstract: Apparatus and method for data security in a data storage device. In some embodiments, an alternating pattern is written to a magnetic recording medium as a sequence of symbols at a selected clock rate. A repeatable magnetic signature is generated by reading the alternating pattern from the medium, the magnetic signature having relatively weak entropy at boundaries of the symbols. A multi-bit digital sequence is extracted from the repeatable magnetic signature, the digital sequence having relatively strong entropy. The digital sequence is stored in a separate memory coupled to the medium. Access to data stored on the medium is authenticated responsive to the digital sequence stored in the separate memory.

Abstract: Systems and methods for tracking at least one entity. Systems according to various embodiments may include an interface for at least receiving training data representing movements of a plurality of training entities and a query regarding a test entity's movement, a memory, and at least one processor executing instructions stored on the memory to create a plurality of tracks, generate an index of the plurality of tracks, execute the received query, and output a feature value with respect to the test entity.

Abstract: Aspects of the subject disclosure may include, for example, a method comprising obtaining channel change data for a media processor coupled to a gateway; the channel change data relates to channel changes requested during recurring time periods. A channel viewing profile is determined for the media processor, and a channel viewing map is generated corresponding to a portion of the channel viewing profile for one of the time periods; the channel viewing map comprises a list of predicted channels likely to be requested during a recurrence of the time period. Signals are provided to the media processor corresponding to the predicted channels, each of the predicted channels thereby being available for an instant channel change responsive to a channel change request. Other embodiments are disclosed.

Abstract: Example isolated AC-DC power supplies include a PFC converter coupled to an AC input, a DC-DC converter coupled between the PFC converter and a DC output, and a controller configured to control switching operation of the DC-DC converter. A pulse modulator is coupled to an output of the PFC converter to receive a signal representative of voltage ripple at the output of the PFC converter, and is configured to modulate a pulse signal based on an amplitude of the voltage ripple. A pulse demodulator is coupled to the pulse modulator to receive the modulated pulse signal, and is configured to demodulate the modulated pulse signal and provide a demodulated signal to adjust switching operation of the DC-DC converter. Also disclosed are methods for controlling isolated AC-DC power supplies.

Abstract: A dynamic self-organized helical superstructure device includes a chiral material and a liquid crystal material disposed between first and second substrates. The helical superstructure is reversibly switchable upon the application of at least one external stimulus from one state to another state among three states: a standing helix, a uniform lying helix, and an in-plane rotation state.

Abstract: A sequence of symbols is generated to describe a set of write data, the symbols having a length of nT, where T is a channel clock rate and n is an integer over a predetermined range. Bi-directional write currents are applied to a write pole to record the sequence of symbols to a magnetic storage medium. The write pole has an effective footprint with a downtrack length of mT, where m is an integer. The write currents are switched between a first rail current and a second rail current for alternating symbols, the write currents further transitioning to an intermediate current value for at least one channel clock period for symbols longer than 1T. Write currents are applied to the write pole when recording symbols having a length longer than mT using the effective footprint of the write pole as an interval.

Abstract: The present invention discloses a double side display frame, comprising a top, a first side part, a bottom and a second side part which are connected end to end and jointly surround a backlight cavity, and the bottom and the top are oppositely located between the first side part and the second side part; the first side part comprises a first window and a first installation slot, and the first window penetrates a middle part of the first side part and communicates with the backlight cavity, and the first installation slot is located at periphery of the first window; the second side part comprises a second window and a second installation slot, and the second window penetrates a middle part of the second side part and communicates with the backlight cavity, and the second installation slot is located at periphery of the second window.

Abstract: A method, system, and computer readable storage medium for providing data to a user interface for performance monitoring are disclosed, in which an a data definition is acquired, where the data definition is generated in response to a definition of the user interface. Data is acquired from data sources based on the data definition. The acquired data is processed based on the data definition, and the processed data is cached.