Abstract: Drag reducing slurries and methods of making and using the same are disclosed herein. In some embodiments, a drag reducing slurry includes polymer particles having drag reducing properties, each particle having a surface that has at least two different polarities, a first surfactant, a second surfactant, a rheological modifier, a defoamer, a pH modifier, and a carrier fluid, wherein the first surfactant has a higher polarity than the second surfactant. In some embodiments, the slurry has a low shear viscosity, measured at 1 Hz, of less than 10,000 centipoise (cP), a tan ? of less than or equal to 0.5, a complex viscosity less than 100,000 mP·s, and a stability of at least 90 days.

Abstract: Disclosed is a method for producing an organic polymer aerogel and corresponding aerogels and articles of manufacture comprising such aerogels. The method can include polymerizing an organic polymerizable material in the presence of an organic solvent having a high vapor pressure and/or a low boiling point to obtain an organic polymer gel comprising an organic polymer matrix and the organic solvent, and subcritical or ambient drying the organic polymer gel under conditions suitable to remove the step (a) organic solvent and form an organic polymer aerogel.

Abstract: Disclosed herein are amphiphilic surfactants which comprise a polymer chain having a hydrophobic unit and hydrophilic unit wherein the polymer is tethered to an inorganic nanoparticle. Further disclosed are methods for preparing the disclosed amphiphilic surfactants.

Abstract: Disclosed herein are amphiphilic surfactants which comprise a polymer chain having a hydrophobic unit and hydrophilic unit wherein the polymer is tethered to an inorganic nanoparticle. Further disclosed are methods for preparing the disclosed amphiphilic surfactants.

Abstract: A microphone circuit includes a capacitor capsule and first and second impedance converters connected differentially to the capacitor capsule. The microphone circuit includes first and second output buffer amplifiers connected differentially to the first and second impedance converters.

Abstract: A microphone circuit includes a capacitor capsule and first and second impedance converters connected differentially to the capacitor capsule. The microphone circuit includes first and second output buffer amplifiers connected differentially to the first and second impedance converters.

Abstract: A closed-loop stabilization system and method for a radiation detector system including a scintillator and a light sensing device for detecting the scintillation light produced in the scintillator through interaction with impinging radiation. A spectrally stable gamma ray measurement for downhole and other non-isothermal gamma ray measurement applications is obtained by use of a light source for emitting photons, preferably ultra-violet photons, into the scintillator that are not detectable by the light sensing device. The light source causes the scintillator to fluoresce at a wavelength detectable by the light sensing device, and the change in measured fluorescence is used to adjust system gain to account for variations in scintillator output attributable to environmental conditions. In this manner, the stabilization system adjusts the system gain to maintain consistency among radiation measurements over a wide temperature range.