Abstract: Methods involving interpreting signals from a brain-machine interface (BMI) are described, as well as methods involving adjusting an implanted or wearable BMI device. The method includes receiving neural signals from a brain of a subject into a BMI decoder. The method includes determining an activity change of the subject based on a sensor. The method includes routing the neural signals from a first model to a second model in the BMI decoder based on the determined activity change. The method includes translating, using the second model in the BMI decoder, the neural signals into a command. The method includes sending the command to a controller.

Abstract: The disclosure provides an emitter-less solar cell design featuring p-or-n type GaAs with alternating p-n junction regions on the back-surface of the cell, opposite incident solar irradiance. Various layers of p-or-n type GaAs are interfaced together to collect charge carriers, and a thin layer of AlGaAs is applied to the front and back surfaces to prevent recombination of charge carriers. In some embodiments, the layered and doped structure generally provides an AlGaAs window layer of about 20 nm doped to about 3×(1018) cm?3, a GaAs absorption layer of about 1200 nm doped to about 2×(1017) cm?3, an AlGaAs heterojunction layer of about 20 nm doped to about 3×(1018) cm?3, and a GaAs contact layer of about 20 nm doped to about 1×(1019) cm?3. Additionally, AlGaAs BSF-heterojunction layer and GaAs BSF-contact layers each have a depth of about 20 nm and are doped to about 3×(1018) cm?3 and 1×(1019) cm?3 respectively.

Abstract: The disclosure provides a solar cell design featuring p-or-n type GaAs with alternating p-n junction regions on the back-surface of the cell, opposite incident solar irradiance. Various layers of p-or-n type GaAs are interfaced together to collect charge carriers, and a thin layer of AlGaAs is applied to the front and back surfaces to prevent recombination of charge carriers. In some embodiments, the layered an doped structure generally provides an AlGaAs window layer of about 20 nm doped to about 4×(1018) cm?3, a GaAs absorption layer of about 2000 nm doped to about 4×(1017) cm?3, a GaAs emitter layer of about 150 nm and doped to 1×(1018) cm?3, an AlGaAs heterojunction layer of about 40 nm doped to about 3×(1018) cm?3, and a GaAs emitter-contact layer of about 20 nm doped to about 1×(1019) cm?3. Additionally, AlGaAs BSF layer and GaAs BSF-contact layers each have a depth of about 20 nm and are doped to about 4×(1018) cm?3 and 1×(1019) cm?3 respectively.

Abstract: This invention relates to the oil and gas production industry and can be used for preventing fracture closing during fracturing of producing oil layers. Proppant comprising baked feedstock grains, with the difference that a burden material comprising silicon oxide and aluminum oxide at the aluminum oxide content of not less than 60% (by weight) is used as the feedstock; the apparent density of the proppant varies from 1.7 to 2.

Abstract: The present invention is an apnea detection device with a remote monitoring capability. It includes a transmitter housing having a first portion and a second portion, the first portion has a structure with a bottom planar extension which has a stop coupled thereto and extended upwardly therefrom. The second portion of the housing is adapted to be slidably inserted within the interior space of the first portion. There is also a stiff two piece strap with ends connected to the first portion of the housing and second portion of the housing and a fastener, whereby the strap allows securement to a chest of an infant. There is a conductive strip and a plurality of linearly aligned contacts whereby a decreasing amount of contacts are connected via the conductive strip upon the sliding of the second portion of the housing from an unbiased orientation to a biased orientation.

Abstract: An apnea detection device with a remote monitor comprising a transmitter housing having a first portion and a second portion. The second portion has an unbiased contracted orientation with the second portion proximally situated with respect to the first portion. The second portion also has a biased extended orientation with the second portion distally situated with respect to the first portion. Also included is a strap for allowing the securement of the housing to a chest of an infant thus allowing the housing to be repeatedly biased coincidently with the breathing of the infant. A detection mechanism is included with the transmitter housing for monitoring biasing of the second portion associated with the respiration of the infant. Further included is a transmitter unit situated within the interior space of the first portion of the housing and connected to a small battery and the detection mechanism.

Abstract: The present invention is directed to a chemical etching composition for etching metals or metallic alloys. The composition includes a solution of hydrochloric acid, phosphoric acid, ethylene glycol and an oxidizing agent. The etching composition is particularly useful for etching metal surfaces in preparation for subsequent fluorescent penetrant inspection.