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 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 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 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.

Abstract: A surface cleaning apparatus has a cyclone chamber having a longitudinal cyclone axis of rotation wherein the dirt outlet is defined by a gap between the sidewall of the cyclone and a plate positioned at the dirt outlet end of the cyclone.

Abstract: A hand vacuum cleaner has a cyclone assembly comprising a cyclone and a dirt collection chamber. The cyclone assembly has a cyclone assembly axis extending centrally between a front end of the cyclone assembly and a rear end of the cyclone assembly. The cyclone has a horizontally extending cyclone axis and the dirt collection chamber has a lower end which is at a lower elevation than a lower end of the cyclone chamber. A line that extends in a common direction with the cyclone assembly axis intersects the dirt collection chamber at an elevation below the cyclone chamber, a pre-motor filter and a handle of the hand vacuum cleaner.

Abstract: In various aspects, a polymer resin is provided for vat or ultraviolet-assisted direct ink writing (UV-DIW) photopolymerization. The resin can include a polyamic acid salt formed from the addition of a photocrosslinkable amine to a polyamic acid. The resin can include a photoinitiator suitable for initiating crosslinking of the photocrosslinkable amine when exposed to a light source of a suitable wavelength and intensity. The polyamic acid can be formed, for instance, by the addition of a diamine to a suitable dianhydride. Methods of additive manufacturing using the resins are also provided.

Abstract: A computer-implemented method includes receiving a group of sets. Each set has values for immutable attributes that match values for at least one mutable attribute in a prediction request. The method includes generating a deviation model based on the group of sets. The method includes generating multiple sets of likely mutable attribute values using the deviation model. The method includes automatically selecting a neural network based on at least one of the likely mutable attribute values. The neural network includes a set of layers. Each layer includes a set of nodes. A first layer receives inputs at the set of nodes of the input layer. A last layer outputs, from the neural network, outputs modified by a preceding layer. The method includes generating a likelihood corresponding to the at least one mutable attribute in the prediction request using the neural network.

Abstract: A computer system includes memory hardware configured to store computer-executable instructions and processor hardware configured to execute instructions. The instructions include receiving, from a user device, a user verification request. The user verification request includes user identity credentials, a login context describing a login event, and a request for access to a computer system object. The instructions include determining whether the user identity credentials are verified. The instructions include, in response to determining that the user identity credentials are verified, requesting a user token based on the user identity credentials and the login context. The user token specifies entitlements associated with the user identity credentials. The instructions include determining whether the user token specifies entitlements sufficient to access the computer system object.

Abstract: A system comprising a vacuum cleaner and an apparatus for receiving dirt from a dirt collection region of the vacuum cleaner. The apparatus has an air flow passage from an inlet port to a clean air outlet, wherein the dirt collection region of the vacuum cleaner is positionable in air flow communication with the inlet port. The apparatus also has an air treatment member positioned in the air flow passage downstream from the inlet port wherein the air treatment member comprises an apparatus dirt collection region. When the apparatus is standing on the floor, the apparatus has an upper end which has the inlet port, and the dirt collection region of the vacuum cleaner is moved in a downward direction to an emptying position in which the dirt collection region of the vacuum cleaner is in air flow communication with the inlet port.

Abstract: An attachment for a hair dryer has a cylindrical body having an inlet end, an opposed closed end, a body axis extending centrally through the cylindrical body between the inlet end and the opposed close end and an axially extending cylindrical sidewall. An air flow path extends from an inlet port provided at the inlet end to a plurality of air outlets provided at the axially extending cylindrical sidewall. The air outlets are angularly spaced around the attachment. A diverting member is rotatably mounted with respect to the cylindrical body about a diverting member axis that is coaxial with the body axis. In operation, rotation of the diverting member alters a direction of air exiting the air outlets.

Abstract: Sphingosine kinases are enzymes that catalyze the biosynthesis of sphingosine-1-phosphate. The invention provides prodrugs of compounds that are effective for inhibition of sphingosine kinase type 1, sphingosine kinase type 2, or both, according to formula (I) as described herein. Formula I compounds are useful in the treatment of a range of diseases wherein increasing the level of sphingosine-1-phosphate in blood is medically indicated. The invention also provides pharmaceutical compositions of Formula I compounds.

Abstract: A garbage can has an inlet port that is closable about a dirt collection region of a vacuum cleaner such that the inlet port is substantially sealed around the dirt collection region. The garbage can also has a suction motor to draw dirt out of the dirt collection region.

Abstract: The present invention relates to medical devices and methods for treating a lesion such as a vascular stenosis using non-thermal irreversible electroporation (NTIRE). Embodiments of the present invention provide a balloon catheter type NTIRE device for treating a target lesion comprising a plurality of electrodes positioned along the balloon that are electrically independent from each other so as to be individually selectable in order to more precisely treat an asymmetrical lesion in which the lesion extends only partially around the vessel.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for training and deploying machine-learning estimation networks in a communications system. One of the methods includes: processing first information with ground truth information to generate a first RF signal by altering the first information by channel impairment having at least one channel effect, using a receiver to process the first RF signal to generate second information, training a machine-learning estimation network based on a network architecture, the second information, and the ground truth information, receiving by the receiver a second RF signal transmitted through a communication channel including the at least one channel effect, inferring by the trained estimation network the receiver to estimate an offset of the second RF signal caused by the at least one channel effect, and correcting the offset of the RF signal with the estimated offset to obtain a recovered RF signal.

Abstract: Photocurable colloid binders are provided that overcome deficiencies associated with 3D printing of high molecular weight polymers via VAT photopolymerization. Methods of additive manufacturing are also provided using the binders. The approaches described herein effectively decouple the viscosity-molecular weight relationship by synthesizing and processing photo-reactive aqueous colloids that are sequestered within a photocrosslinkable scaffold. Sequestering polymers within discrete internal phases prevents inter-particle entanglement of the polymer chains, thus ensuring low viscosity. VP of polymer colloids results in a solid green body embedded with high molecular weight polymer particles. A post-processing heated drying step allows the polymers to coalesce and further entangle, forming a semi-interpenetrating network with mechanical performance of the high molecular weight material. The resins can further include inorganic particles such as silica and other ceramics, metal particles, and the like.

Abstract: A hand vacuum cleaner has an airflow path from an air inlet to a clean air outlet with an air treatment member and a fan and motor assembly in the air flow path. The hand vacuum cleaner has a cyclone chamber with a plate positioned at the front end of the cyclone chamber. A dirt collection chamber is external to and connected in flow communication with a cyclone chamber by a gap located between the plate and the sidewall of the cyclone chamber. The gap is located only at an upper portion of the plate and/or is larger at the upper portion of the plate.

Abstract: A hand vacuum cleaner has a cyclone unit and a pistol grip handle. The cyclone unit comprises a cyclone chamber with a cyclone axis of rotation extending between the front and rear ends of the cyclone chamber. When the hand vacuum cleaner is oriented with the cyclone axis of rotation extending horizontally, the inlet conduit is located at a lower side of the hand vacuum cleaner, the pistol grip handle is provided on a lower side of the main body and the pistol grip handle extends upwardly from a lower end of the pistol grip handle to an upper end of the pistol grip handle.

Abstract: Electroporation-based therapies (EBTs) employ high voltage pulsed electric fields (PEFs) to permeabilize tumor tissue, resulting in changes in passive electrical properties detectable using electrical impedance spectroscopy (EIS). Currently, commercial potentiostats for EIS are limited by impedance spectrum acquisition time (˜10 s); this timeframe is much larger than pulse periods used with EBTs (˜1 s). Fourier Analysis SpecTroscopy (FAST) is introduced as a methodology for monitoring tissue inter-burst impedance (diagnostic FAST) and intra-burst impedance (therapeutic FAST) during EBTs. FAST is a rapid-capture (<<1 s) technique which enables monitoring of inter-burst and intra-burst impedance during EBTs in real-time. FAST identified a frequency which delineates thermal effects from electroporation effects in measured impedance. Significance: FAST demonstrates the potential to perform EIS, in addition to intra-burst impedance spectroscopy, using existing pulse generator topologies.