A system for actively controlling the span-wise rotational twist of a hollow beam along its longitudinal axis, including a hollow beam structure having a leading edge and a trailing edge region, the beam being split along its length, an actuator arranged between split surfaces of the beam, the actuator adapted to move the split surfaces in a longitudinal direction relative to each other, inducing a twist in the beam.
This disclosure involves a new spinel and glass micro-composite material and process for making such. The composite has excellent transmission in the 0.5-5.0 _m wavelength region suitable for various visible and mid IR applications utilizing windows, domes and other geometric shapes. The composite can be made at a temperature about 40% lower than the glass melting temperature and about 50% lower than the spinel sintering temperature. The composite material has high modulus and fracture toughness which are important for impact resistance in armor and other practical applications.
Methods for microfabricating composite materials and composite materials prepared there from are described herein. The sacrificial material can be etched or patterned to create a two-dimensional and/or three-dimensional sacrificial material structure. The resulting sacrificial material structure can be embedded in one or more embedding materials. The sacrificial material(s) are materials whose solubility can be altered by application of a stimulus typically pH, and/or temperature, light, pH, pressure, presence of absence of ions, and combinations thereof.
A nanoparticle containing monoclinic lutetium oxide. A method of: dispersing a lutetium salt solution in a stream of oxygen gas to form droplets, and combusting the droplets to form nanoparticles containing lutetium oxide. The combustion occurs at a temperature sufficient to form monoclinic lutetium oxide in the nanoparticles. An article containing lutetium oxide and having an average grain size of at most 10 microns
A multijunction (MJ) solar cell grown on an InP substrate using materials that are lattice-matched to InP. In an exemplary three-junction embodiment, the top cell is formed from In1-xAlxAs1-ySby (with x and y adjusted so as to achieve lattice-matching with InP, hereafter referred to as InAlAsSb), the middle cell from In1-a-bGaaAlbAs (with a and b adjusted so as to achieve lattice-matching with InP, hereafter referred to as InGaAlAs), and the bottom cell also from InGaAlAs, but with a much lower Al composition, which in some embodiments can be zero so that the material is InGaAs.
A foam pad structure for helmets comprising a hard foam layer and a soft foam layer wherein the hard foam layer and the soft foam layer contain holes or channels scattered throughout the hard foam layer and the soft foam layer in a pattern so as to scatter an incoming pressure wave. A method of mitigating an incoming pressure wave comprising creating through-holes or channels in a soft foam layer, creating through-holes or channels in a hard foam layer, placing the hard foam layer inside a helmet shell, and placing the soft foam layer on the hard foam layer.
A method and system for generating an optical fiber is provided. The method includes creating a green fiber consisting primarily of a ceramic material and sintering the green fiber with a laser by moving the green fiber through a beam of the laser to increase the density of the fiber after sintering. The system for creating a continuous optical fiber includes an extruder, a processing chamber and a laser. The extruder is configured to extrude a ceramic slurry as a green fiber. The processing chamber is configured to receive and process the green fiber.
A ligand design allows compact nanoparticle materials, such as quantum dots (QDs), with excellent colloidal stability over a wide range of pH and under high salt concentrations. Self-assembled biomolecular conjugates with QDs can be obtained which are stable in biological environments. Energy transfer with these ligands is maximized by minimizing distances between QDs/nanoparticles and donors/acceptors directly attached to the ligands or assembled on their surfaces.
The present invention provides a method of making a high temperature superconductor having a doped, nanoparticulate pinning structure. The method includes providing a nanoparticulate pinning material, providing a cuprate material, doping the nanoparticulate pinning material with a dopant to form a doped nanoparticulate material, depositing a layer of the cuprate material on a substrate, and depositing a layer of the doped nanoparticulate material on the layer of cuprate material.
The U.S. Navy seeks to commercialize through patent licensing an acousticelectronic stethoscope that selectively amplifies sounds of medical importance while suppressing environmental background noise.