Abstract: Provided is a method of data storage, the method including receiving, at a host of a key-value store, a request to access a data node stored on a storage device of the key-value store, locating an address corresponding to the data node in a host cache on the host, and determining that the data node is in a kernel cache on the storage device.

Abstract: A computerized method of automatic distributed communication includes training a first and second machine learning models with historical feature vector inputs to generate a likelihood output and a mean count output, respectively. For each entity in a set, the method includes processing a likelihood feature vector input with the first machine learning model to generate a likelihood output indicative of a likelihood that the entity will have an avoidable negative health event within a specified first time period, and processing a mean count feature vector input with the second machine learning model to generate a mean count output indicative of an expected number of avoidable negative health events that the entity will have within a specified second time period. The method includes automatically distributing structured campaign data to at least a subset of entities in the set according to the likelihood output or the mean count output.

Abstract: A system and method for monitoring the health of dialysis patients with Raman spectroscopy measurements of one or more target analytes is described. The methods include irradiating one or more fluids of interest with light to produce one or more spectrum and detecting the spectrum with a detector. The fluids of interest are preferably those related to dialysis, including hemodialysis and peritoneal dialysis. In a preferred embodiment, the fluids are irradiated with monochromatic light, and one or more Raman spectra are detected as a result of the irradiation. The fluids may be irradiated within the dialysis tubing itself, or removed from the dialysis tubing and irradiated in a separate chamber. The Raman spectra of one or more target analytes of a dialysis patient may be followed over time or compared to one or more reference spectra, thereby providing information on the health of dialysis patients.

Abstract: A surface cleaning apparatus having an upright section moveable relative to a surface cleaning head between a storage position and a rearwardly reclined floor cleaning position. The upright section comprising a removable hand vacuum cleaner. The hand vacuum cleaner is operable in a first mode of operation in which the surface cleaning apparatus is operated to clean a floor, the inlet of the hand vacuum cleaner is in flow communication with the surface cleaning head air outlet and the air treatment member of the hand vacuum cleaner is operable to treat air drawn in through the dirty air inlet of the surface cleaning head. The hand vacuum cleaner is also operable in a second mode of operation in which the hand vacuum cleaner is operable to directly clean a floor or the air inlet of the hand vacuum cleaner is directly connected to the downstream end of an accessory tool.

Abstract: A surface cleaning apparatus has a rotatably mounted brush. The brush has first and second microfiber pads separated by bristles.

Abstract: An environmental control system comprises a fluid flow path which has a pump and circulates liquid to a first heat exchanger in a first room and to a second heat exchanger in a second room. The fluid flow path comprises a pump. A user inputs a target temperature for the first room via a first user interface that is located in the first room, which is communicated to the control unit and a sensor located in the room communicates the temperature in the first room to the control unit. A user inputs a target temperature for the second room via a second user interface that is located in the second room, which is communicated to the control unit and a sensor located in the room communicates the temperature in the second room to the control unit. The control is physically isolated from the user interfaces and temperatures sensors.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for training and deploying machine-learned communication over multi-input-multi-output (MIMO) channels.

Abstract: A hand vacuum cleaner has a dirt separator comprising a first air treatment stage and a second air treatment stage, the first air treatment stage comprising a first air treatment chamber and the second air treatment stage comprises a second stage air treatment chamber. An openable door opens the first air treatment chamber when the door is in an open position. The front door has a diameter and the rear end of the first air treatment chamber stage has a diameter that is generally equal to the diameter of the front door. The sidewall of the first air treatment stage is moveable with respect to the suction motor and, when the sidewall is moved with respect to the suction motor, the front openable door and the dirty air inlet also move with the sidewall.

Abstract: In some aspects, described herein are methods of additive manufacturing in which one or more corrugated layers are incorporated into the three-dimensional (3D) object. Also provided herein are 3D objects that can include one or more corrugated layers.

Abstract: A hand vacuum cleaner has a housing comprising a first portion that houses a suction motor. A cyclone unit is positioned in an air flow passage upstream from the suction motor. The cyclone unit comprises a cyclone and a dirt collection region that is positioned forward of the cyclone. The cyclone unit front end has an openable door. The cyclone air outlet comprises an assembly which includes a screen. The assembly is moveable relative to the cyclone unit sidewall in a common direction with the cyclone axis of rotation whereby the assembly and the sidewall are separable from each other in a forward direction.

Abstract: A fan assembly comprising a plurality of nested components comprising a first stator; a first rotor that is radially spaced from the first stator, wherein the first rotor is magnetically driven by the first stator, the first rotor includes a second stator whereby the second stator rotates with the first rotor; a second rotor that is radially spaced from the second stator, wherein the second rotor is magnetically driven by the second stator; and, a fan blade drivenly connected to the second rotor.

Abstract: A cooking appliance including a combustion zone and a cooking zone. The combustion zone has a combustion zone air flow path extending from a combustion zone air inlet to a combustion zone air outlet. The cooking zone overlies the combustion zone, and the cooking zone includes a closed cooking volume having a cooking surface and an openable lid. Combustion products produced in the combustion zone are isolated from the closed cooking volume.

Abstract: A dirt collection region of the vacuum cleaner is removably positionable in air flow communication with an inlet port of an apparatus in which the openable door of the dirt collection region of the vacuum cleaner is positioned interior the apparatus. The apparatus has an air treatment member. When the apparatus is standing on the floor, the apparatus has an upper end which has the inlet port. When the dirt collection region of the vacuum cleaner positioned in flow communication with the inlet port of the apparatus and when the system is in the emptying mode of operation, a motor and fan assembly of the vacuum cleaner moves air from the dirt collection region of the vacuum cleaner as dirt, which has been accumulated in the dirt collection region of the vacuum cleaner, travels to the air treatment member of the apparatus.

Abstract: A hand vacuum cleaner comprises a cyclone, a conical pre-motor filter that is positioned rearward of the cyclone and a suction motor. The pre-motor filter has a front end that faces that faces towards the cyclone air outlet. The conical pre-motor filter has an open interior volume, an outer surface, which is an upstream surface of the pre-motor filter, and an inner surface, which is a downstream surface of the pre-motor filter.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for training and deploying machine-learned compact representations of radio frequency (RF) signals. One of the methods includes: determining a first RF signal to be compressed; using an encoder machine-learning network to process the first RF signal and generate a compressed signal; calculating a measure of compression in the compressed signal; using a decoder machine-learning network to process the compressed signal and generate a second RF signal that represents a reconstruction of the first RF signal; calculating a measure of distance between the second RF signal and the first RF signal; and updating at least one of the encoder machine-learning network or the decoder machine-learning network based on (i) the measure of distance between the second RF signal and the first RF signal, and (ii) the measure of compression in the compressed signal.

Abstract: Methods of making graphene oxide and reduced graphene oxide are provided. The methods can include a simple one-pot synthesis of graphene oxide from a purified coal powder using a mild oxidizing acid. The methods provide for an improved, more cost-effective, and simpler process than conventional methods such as Hummers methods. In some aspects, placing the purified coal powder in the mild oxidation atmosphere includes contacting the purified coal powder with a mild oxidizing acid such as nitric acid, nitrous acid, sulfuric acid, phosphoric acid, benzoic acid, or a combination thereof. In some aspects, the mild oxidizing acid consists essentially of nitric acid. Graphene oxides and reduced graphene oxides prepared by the methods are also provided.

Abstract: A series of vacuum cleaner is produced using common components and one or more interchangeable components, including a cyclone casing and/or a motor casing.

Abstract: A surface cleaning head has a rotatably mounted brush, which is provided at a front end of the surface cleaning head, a cleaning solution delivery system and a removable liquid collection reservoir, which is provided in the surface cleaning head rearward of the brush. The cleaning solution delivery system comprises a pump, a liquid reservoir and a fluid flow path extending from the liquid reservoir to at least one delivery nozzle, wherein the at least one delivery nozzle is provided in the surface cleaning head and is configured to deliver a liquid drawn from the liquid reservoir to a portion of the brush that is located internal of the surface cleaning head.

Abstract: A surface cleaning apparatus comprises a cyclone chamber having a cyclone bin assembly comprising a cyclone chamber positioned in the air flow path, the cyclone chamber has a cyclone air inlet, a cyclone air outlet, a cyclone chamber front end, a cyclone chamber rear end, a cyclone chamber sidewall extending between the front and rear ends of the cyclone chamber and a cyclone axis of rotation that extends in a forward/rearwards direction. The front end of the cyclone chamber has a front height in a direction transverse to the cyclone axis of rotation that is less than a rear height of the cyclone chamber in the direction transverse to the cyclone axis of rotation.