Abstract: Polymer-coated proppants for hydraulic fracturing of oil and gas wells have an outer layer portion that comprises an organofunctional coupling agent, preferably an organofunctional silane coupling agent. The use of an organofunctional silane coupling agent in the outer layer portion of the proppant coating is preferably chosen to expose functionalities that will be reactive towards similar functionalities of adjacent and similarly coated proppants so that, when introduced downhole, these proppants form interparticle bonds at the temperatures and crack closure pressures found downhole in fractured strata. Such enhanced interparticle bonding helps keep the proppant in the fracture and maintains conductivity with reduced flowback. The invention also helps proppants designed for low temperature well to bond more firmly and allows proppants designed for high temperature wells to bond well even at lower downhole temperatures, thereby extending their useful range.

Abstract: The present disclosure comprises a novel system that attaches to skis in an alpine touring setup and provides electric, battery powered, motorized traction that assists the skier when traveling uphill or horizontal on snow. In one embodiment, the devices removably attach to the ski near the tail and have a cylindrical traction surface that sits below the ski near the tail. The traction surface is powered by an electric hub motor which engages, either with initiation of forward movement, input from sensors, or a set programmed cadence, thereby assisting the user's moving, unweighted ski forward until the completion of that step. Once arrived at the desired destination, or when downhill travel is warranted, the user removes and stores the devices from each ski and proceeds downhill.

Abstract: A system for maintaining links and revisions for documents is described. The system comprises a productivity server configured to provide a document collaboration service and having processors and a memory storing program data. The program data configures the processors to: receive requests indicating revisions on the documents, including a first request that indicates a first revision to a first document, and a second request that indicates a second revision to a second document. For each request, a workspace revision counter shared by, and indicating a revision state of, the documents is incremented. The workspace revision counter is incremented a first time for the first request and a second time for the second request. Revisions corresponding to the each request are queued in a workspace revision queue shared by the documents. The revisions are caused to be performed on the documents that correspond to the each request.

Abstract: A power system for an aircraft engine provides rotational drive to propeller driven and turbofan jet engine powered aircraft by use of a propeller or fan drive motor. Electrical power is provided to the drive motor by a high efficiency electrical power generator with reduced electromagnetic drag or reverse torque. The electric generator utilizes a solid state rotor that does not rotate which allows for power generation without reverse torque or the usual energy required to rotate the rotor inside the stator of the generator. Only the magnetic poles of the disclosed rotor rotate to generate the power. The fan blades of the turbofan jet engine are driven by the electric drive motor in which the rotor is a part of the fan as well as the drive from the high pressure turbine.

Abstract: A method for maintaining links and revisions for a plurality of documents is described. The method is carried out by one or more computing devices. Requests that indicate revisions to be carried out on the plurality of documents are received, at least one of the requests corresponding to revisions for different documents of the plurality of documents. For each request: a workspace revision counter that is shared by the plurality of documents is incremented, the workspace revision counter indicating a revision state of the plurality of documents, the revision is queued in a workspace revision queue that is shared by the plurality of documents, and the revision indicated by the request is caused to be performed on one or more documents of the plurality of documents that correspond to the request.

Abstract: In some examples, a non-transitory computer-readable medium stores machine-readable instructions, which, when executed by a processor, cause the processor to: identify an event of a computing device from operational data of the computing device; evaluate the event to determine if the event is a non-routine event; and store the event to a timeline if the event is a non-routine event, where the timeline includes an incident of the computing device.

Abstract: A protection system for a hydraulic cylinder piston having a barrel and a piston rod reciprocating therein, the protection system comprising a piston rod shield which is fixed with respect to the piston rod in use to move with respect to the barrel to cover the piston rod when the piston rod is exposed from the barrel and wherein the piston rod shield comprises a non-metallic flexible material which substantially returns to shape after deformation.

Abstract: The present disclosure relates to a power generator and method of generating AC or DC power, including the removal of reverse torque and utilizing the electromagnetic coils of a generator stator to harvest the inherent energy available in the magnetic domains of ferromagnetic and paramagnetic materials of pole pieces of a generator rotor. The method comprises: determining an excitation cycle based on a target frequency of the power generator; executing the excitation cycle by providing a current to one or more wires of the generator according to a predefined sequence to align magnetic domains of the salient pole pieces of the generator rotor to produce an evolving magnetic flux field; and routing a resultant current, generated by the magnetic flux field, to a power output. Systems and apparatuses disclosed herein comprise means for carrying out the same.

Abstract: A solid-state electromagnetic rotor, comprising a plurality of salient pole pieces arranged around a supporting structure, wherein a first end of each salient pole piece is attached to the support structure and a second end of each salient pole piece points outward away from the supporting structure; and wires wound around each salient pole piece, wherein when the wires of the plurality of salient pole pieces are sequentially excited by an excitation circuit, the salient pole pieces are energized to provide a moving polar magnetic field in the form of distinct magnetic poles as desired to accomplish power generation.

Abstract: A power system for an aircraft engine provides rotational drive to propeller driven and turbofan jet engine powered aircraft by use of a propeller or fan drive motor. Electrical power is provided to the drive motor by a high efficiency electrical power generator with reduced electromagnetic drag or reverse torque. The electric generator utilizes a solid state rotor that does not rotate which allows for power generation without reverse torque or the usual energy required to rotate the rotor inside the stator of the generator. Only the magnetic poles of the disclosed rotor rotate to generate the power. The fan blades of the turbofan jet engine are driven by the electric drive motor in which the rotor is a part of the fan as well as the drive from the high pressure turbine.

Abstract: Polymers and fracturing fluid compositions including a base fluid, an effective amount of a hydratable polymer composition including one or more gel-forming hydratable polymers, a friction reducer composition including hydrolyzed or partially hydrolyzed hydrolyzable polymers and copolymers, a cross-linking composition in an amount sufficient to crosslink the one or more gel-forming hydratable polymers to form crosslinked structures within the fracturing fluid composition with or without a proppant and methods including combining an aqueous fluid and an oleaginous fluid to prepare an invert emulsion comprising a polymerizable composition, degassing the invert emulsion under an extensional flow regime through an elongated passageway of an extender and thereby removing oxygen to produce a degassed invert emulsion and compositions and methods including a hydratable additive concentrate comprising a hydratable additive that is at least substantially hydrated and a hydrating liquid, wherein the hydratable additive

Abstract: The present disclosure comprises a novel system that attaches to skis in an alpine touring setup and provides electric, battery powered, motorized traction that assists the skier when traveling uphill or horizontal on snow. In one embodiment, the devices removably attach to the ski near the tail and have a cylindrical traction surface that sits below the ski near the tail. The traction surface is powered by an electric hub motor which engages, either with initiation of forward movement, input from sensors, or a set programmed cadence, thereby assisting the user's moving, unweighted ski forward until the completion of that step. Once arrived at the desired destination, or when downhill travel is warranted, the user removes and stores the devices from each ski and proceeds downhill.

Abstract: A generator with reduced reverse torque which may be used as a singular, point of use, compact electric generator that produces power with high efficiency and very low reverse torque. The generator comprising a stator having slots and stator coils and a series of slot rotors placed in relation to the stator coils such that minimal destructive interaction is caused between magnetic fields of each rotor and induced magnetic fields of the stator when the power generator is connected to an electric load with at least a portion of that power being sent to a storage device where a portion of the stored power is provided to excitation circuitry utilized to re-excite a motor to drive the slot rotors.

Abstract: Solid proppants are coated with a phenol-urethane coating in one or more layers by a method comprising coating a proppant solid and then curing the coated proppant under conditions sufficient to substantially cure said proppant, wherein said coating comprises a substantially homogeneous mixture of (i) an isocyanate component having at least 2 isocyanate groups, (ii) an amine reactant, and optionally (iii) an amine that is a latent curing agent for said isocyanate.

Abstract: A solid-state electromagnetic rotor, including a plurality of salient pole pieces arranged around a supporting structure, wherein a first end of each salient pole piece is attached to the support structure and a second end of each salient pole piece points outward away from the supporting structure. The wires wound around each salient pole piece, wherein when the wires of the plurality of salient pole pieces are sequentially excited by an excitation circuit. The salient pole pieces are energized to provide a moving polar magnetic field in the form of distinct magnetic poles as desired to accomplish power generation.

Abstract: Rupture fairings are disclosed. A disclosed example fairing for use with an aircraft includes a surface to at least partially define an exterior surface of the aircraft when the fairing is installed onto the aircraft, and a membrane to rupture during flight of the aircraft, where the membrane defines at least a portion of the exterior surface.

Abstract: A method for maintaining links and revisions for a plurality of documents is described. The method is carried out by one or more computing devices. Requests that indicate revisions to be carried out on the plurality of documents are received, at least one of the requests corresponding to revisions for different documents of the plurality of documents. For each request: a workspace revision counter that is shared by the plurality of documents is incremented, the workspace revision counter indicating a revision state of the plurality of documents, the revision is queued in a workspace revision queue that is shared by the plurality of documents, and the revision indicated by the request is caused to be performed on one or more documents of the plurality of documents that correspond to the request.

Abstract: Fracturing fluid compositions including a base fluid including a high TDS produced and/or flow back water, brackish water, RO reject water, clear brine, and mixtures thereof with or without added fresh water and systems, and methods for making and using same, where the method includes: (a) adding a first buffer to adjust the pH of a base fluid to an acidic pH, (b) adding a hydratable polymer or polymer slurry to the base fluid to form a hydratable polymer fracturing fluid, (c) adding a cross-linking composition to the hydratable polymer fracturing fluid to form a pre-cross-linked fracturing fluid, and (d) if needed, adding a second buffer to the pre-cross-linked fracturing fluid to adjust the pH of the pre-cross-linked fracturing fluid to form a viscosified fracturing fluid having a crosslinked structure.

Abstract: Apparatuses and systems and methods implementing the apparatuses and systems include a blender base unit having an rpm sensor and the methods determines a minimum rpm value that is converted to a shear rate, a fluid velocity rate, and an estimated maximum fracture width.

Abstract: Polymer-coated proppants for hydraulic fracturing of oil and gas wells have an outer layer portion that comprises an organofunctional coupling agent, preferably an organofunctional silane coupling agent. The use of an organofunctional silane coupling agent in the outer layer portion of the proppant coating is preferably chosen to expose functionalities that will be reactive towards similar functionalities of adjacent and similarly coated proppants so that, when introduced downhole, these proppants form interparticle bonds at the temperatures and crack closure pressures found downhole in fractured strata. Such enhanced interparticle bonding helps keep the proppant in the fracture and maintains conductivity with reduced flowback. The invention also helps proppants designed for low temperature well to bond more firmly and allows proppants designed for high temperature wells to bond well even at lower downhole temperatures, thereby extending their useful range.