Abstract: The various implementations described herein include methods and devices for generating personalized playlists. In one aspect, a method includes obtaining information about recent media items presented to a user, the information including data about a respective time of day and day of week each media item was presented to the user. The method further includes grouping the recent media items into clusters based on time of day and day of week; and generating a recommendation vector using a weighted average of the clusters. The method also includes generating a playlist for the user by identifying a plurality of media items using the recommendation vector; and presenting the playlist to the user.

Abstract: A data diode chip provides a flexible device for collecting data from a data source and transmitting the data to a data destination using one-way data transmission. On-chip processing elements allow the data diode to identify automatically the type of connectivity provided to the data diode and configure the data diode to handle the identified type of connectivity.

Abstract: In some embodiments, apparatuses and methods are provided herein useful to orthodontic appliances. In some embodiments, an orthodontic appliance comprises a main body portion including a first end and a second end, wherein the first end is opposite the second end, the main body portion comprising a first orthodontic device, wherein the first orthodontic device is configured to be bonded to a first tooth of a patient's mouth, and wherein the first orthodontic device is located to proximal the first end, and an eyelet, wherein the eyelet is located proximal to the second end, and a second orthodontic device, wherein the second orthodontic device is configured to be bonded to a second tooth of the patient's mouth, wherein the second orthodontic device includes a protrusion, and wherein the protrusion is located within the eyelet during use in the patient's mouth.

Abstract: A method of on-demand energy delivery to an active suspension system is disclosed. The suspension system includes an actuator body, a hydraulic pump, an electric motor, a plurality of sensors, an energy storage facility, and a controller. The method includes disposing an active suspension system in a vehicle between a wheel mount and a vehicle body, detecting a wheel event requiring control of the active suspension; and sourcing energy from the energy storage facility and delivering it to the electric motor in response to the wheel event.

Abstract: A testing platform tests an electrical and mechanical system such as an HVAC unit according to an algorithm that reduces the total testing time of the components of the system, while ensuring the safety of the system during system-wide testing. The platform uses constraints that are checked both before and during the testing to ensure that HVAC operating conditions are acceptable for starting and maintaining component tests. Preferably, the platform uses finite-state machines for each device to organize the component tests, allowing for monitoring of constraints and starting, pausing, and stopping component tests. Preferably, total test execution time is reduced by running component tests in parallel, running component tests based on loads of the components, or combinations of both.

Abstract: Electric vehicle supply equipment adapter, that enables the charging of much smaller, personal electric vehicles, that normally require an ordinary wall outlet.

Abstract: A downhole system includes a lower completion having at least one tubular including a first end and a second end terminating at a shoe. The at least one tubular defining a flow path. A packer is arranged at the first end. A fluid loss control valve (FLCV) is arranged between the packer and the shoe. A screen system is arranged between the FLCV and the shoe. The screen system includes a screen and a non-mechanically operated flow control valve that selectively isolates the flow path from formation fluids passing through the screen. A wellbore clean out string is insertable into the lower completion. The wellbore clean out string includes a selectively activated casing cleaner and a setting tool. The selectively activated casing cleaner is spaced from the setting tool.

Abstract: Presented herein are systems and methods for attenuating flow ripple generated by a hydraulic pump. In certain aspects, a method and system for operating a hydraulic positive displacement pump according to a stabilized command profile are disclosed, such that flow ripple generated by operation of the pump according to the stabilized command profile is attenuated as compared to operation of the pump according to a corresponding nominal command profile. In other aspects, a pressure-balanced active buffer is disclosed that allow for at least partially cancelling flow ripple in a hydraulic circuit comprising a pump. In another aspect, a method for generating ripple maps for a pump is disclosed. Such ripple maps may be used, for example, to determine the stabilized command profile used to operate the pump, or may be used by the pressure-balanced active buffer to counteract ripple in the hydraulic circuit.

Abstract: A flow-field plate (101) for a polymer electrolyte membrane device such as an electrolyser or a fuel cell comprising an inlet on one side (102) of the plate and 5 an outlet (103) on the opposite side, a distribution array (110) including a plurality of linear channels (106), a first interface (104) between the inlet (102) and distribution array (110) and a second interface (105) between the distribution array (110) and the outlet (103), wherein each interface includes up to rn rows of baffles (107), where rn=the width of the interface hd divided by the baffle diameter hb, the 10 majority of the baffles in each row being set at a particular angle relative to the longitudinal axis of the linear channels (106).

Abstract: A method of on-demand energy delivery to an active suspension system comprising an actuator body, hydraulic pump, electric motor, plurality of sensors, energy storage facility, and controller is provided. The method comprises disposing an active suspension system in a vehicle between a wheel mount and a vehicle body, detecting a wheel event requiring control of the active suspension; and sourcing energy from the energy storage facility and delivering it to the electric motor in response to the wheel event.

Abstract: Method and apparatus for improving the performance, response, and durability of an electro-hydraulic active suspension system. The noise caused by hydraulic flow ripple is reduced and system response is improved.

Abstract: An example of an apparatus to recover heat from multiple layers of computer components is provided. The apparatus includes a tank to store a fluid. The apparatus further includes a first mining layer disposed in the tank. In addition, the apparatus includes a second mining layer disposed in the tank proximate to the first mining layer. The first mining layer and the second mining layer are substantially parallel. The apparatus also includes an outlet disposed on the tank to release the fluid. Furthermore, the apparatus includes a pump to generate a suction to draw the fluid out of the tank via the outlet. The suction creates a fluid flow in a space between the first mining layer and the second mining layer.

Abstract: An example of an apparatus to recover heat from heat generating elements is provided. The apparatus includes a closed-loop fluid flow system having a fluid charged therein. The fluid is to absorb heat. In addition, the apparatus includes a heat exchanger disposed along the closed-loop fluid flow system to remove the heat from the fluid. Furthermore, the apparatus includes a chamber disposed along the closed-loop fluid flow system to receive the fluid at an inlet and to release the fluid from an outlet. The apparatus also includes a plurality of heat generating elements disposed in the chamber. Each heat generating element of the plurality of heat generating elements is immersed in the fluid. The apparatus additionally includes a pump to circulate the fluid in the closed-loop fluid flow system between the heat exchanger and the chamber.

Abstract: Presented herein are systems and methods for attenuating certain pulsations in a hydraulic system comprising a pump and a hydraulic actuator. In certain aspects, an accumulator comprising an internal volume that is divided into a working chamber and a contained chamber may be utilized to at least partially attenuate propagation of certain pulsations in the system. The working chamber may be fluidically coupled to the pump via a first flow path and fluidically coupled to a chamber of the actuator via a second flow path. The system may be designed such that a first inertance of the first flow path is greater than a second inertance of the second flow path. Additionally or alternatively, the system may be designed such that a resonance associated with the first inertance and a compliance of the accumulator may occur at a resonance frequency of less than 90 Hz.

Abstract: A method and apparatus for analyzing side-channel security vulnerabilities in a digital device. A first time sequence of measurements of side-channel related phenomena of the digital device, such as power draw or electromagnetic emissions is obtained. A second time sequence of debug outputs of the digital device, such as program counter contents or other device processor or register states, is obtained. The first time sequence and the second time sequence are obtained based on a common time reference, and thus correlated in time. A controller can provide a common timing signal to measurement equipment obtaining the first time sequence and to a debug tool obtaining the second time sequence, and the common time reference can be correspond to the common timing signal.

Abstract: A method of on-demand energy delivery to an active suspension system is disclosed. The suspension system includes an actuator body, a hydraulic pump, an electric motor, a plurality of sensors, an energy storage facility, and a controller. The method includes disposing an active suspension system in a vehicle between a wheel mount and a vehicle body, detecting a wheel event requiring control of the active suspension; and sourcing energy from the energy storage facility and delivering it to the electric motor in response to the wheel event.

Abstract: A downhole system includes a lower completion having at least one tubular including a first end and a second end terminating at a shoe. The at least one tubular defining a flow path. A packer is arranged at the first end. A fluid loss control valve (FLCV) is arranged between the packer and the shoe. A screen system is arranged between the FLCV and the shoe. The screen system includes a screen and a non-mechanically operated flow control valve that selectively isolates the flow path from formation fluids passing through the screen. A wellbore clean out string is insertable into the lower completion. The wellbore clean out string includes a selectively activated casing cleaner and a setting tool. The selectively activated casing cleaner is spaced from the setting tool.

Abstract: A data diode chip provides a flexible device for collecting data from a data source and transmitting the data to a data destination using one-way data transmission. On-chip processing elements allow the data diode to identify automatically the type of connectivity provided to the data diode and configure the data diode to handle the identified type of connectivity.

Abstract: Presented herein are systems and methods for attenuating certain pulsations in a hydraulic system comprising a pump and a hydraulic actuator. In certain aspects, an accumulator comprising an internal volume that is divided into a working chamber and a contained chamber may be utilized to at least partially attenuate propagation of certain pulsations in the system. The working chamber may be fluidically coupled to the pump via a first flow path and fluidically coupled to a chamber of the actuator via a second flow path. The system may be designed such that a first inertance of the first flow path is greater than a second inertance of the second flow path. Additionally or alternatively, the system may be designed such that a resonance associated with the first inertance and a compliance of the accumulator may occur at a resonance frequency of less than 90 Hz.

Abstract: Method and apparatus for improving the performance, response, and durability of an electro-hydraulic active suspension system. The noise caused by hydraulic flow ripple is reduced and system response is improved.