Abstract:
Nanostructured or ultra-fine grained metallic systems according to embodiments of the invention may be formed of: pure Cu, pure Fe, or pure Ti, with grain sizes of less than 140 nm, 348 nm, or 59 nm, respectively. The metallic systems demonstrate a monotonically increasing grain size dependence from a minimum value attained at the surface; and a converse relation of microhardness, decreasing from 160 kg/mm2, 265 kg/mm2, or 320 kg/mm2, respectively. The grain refinement process at cryogenic conditions relies on the suppression of room temperature dislocation-mediated deformation mechanisms which facilitate grain restructuring, relaxation, and reorientation. At the cryogenic conditions, alternative mechanism for grain refinement, such as shear localization or dynamic recrystallization may be more dominant. Processes for refining the grain size of these metallic systems may include: subjecting metal plates to a high-energy milling process using a high-energy milling device to impart high impact energies to its surface. Due to the high-efficiency of this attrition process, these metallic systems are ideal candidates for improved corrosion and wear resistance.
Abstract translation:根据本发明的实施方案的纳米结构或超细晶粒金属体系可以分别由具有小于140nm,348nm或59nm的晶粒尺寸的纯Cu,纯Fe或纯Ti形成。 金属系统表现出从表面达到的最小值单调递增的晶粒尺寸依赖性; 和显微硬度的相关关系,分别从160 kg / mm2,265 kg / mm2或320 kg / mm2下降。 低温条件下的晶粒细化过程依赖于抑制室温位错介导的变形机制,促进晶粒重组,松弛和重新取向。 在低温条件下,晶粒细化的替代机理如剪切定位或动态重结晶可能更为主导。 用于精炼这些金属体系的晶粒尺寸的方法可以包括:使用高能铣削装置对金属板进行高能量铣削加工,以赋予其表面高的冲击能。 由于这种磨损过程的高效率,这些金属系统是改善耐腐蚀和耐磨性的理想选择。
Abstract:
A nonvolatile memory comprising at least one ferromagnetic region having permeability which changes from a first state to a second state of lower permeability upon heating; at least one laser operatively associated with the at least one ferromagnetic region which selectively provides heat to the ferromagnetic region to change its p permeability; and a plurality of connectors operatively connected to the at least one laser and adapted to be connected to a current source that provides a current which causes the laser to change the at least one ferromagnetic region from a first state to a second state. Optionally, the memory is arranged as an array of memory cells. Optionally, each cell has a magnetic field sensor operatively associated therewith. Optionally, the nonvolatile memory is radiation hard. Also, a method of recording data by heating at least one ferromagnetic region to change its permeability.
Abstract:
Bondable fluorinated barrier coatings on oxidized metal surfaces. The barrier coatings include a perfluorinated silane having a C2-C30 alkyl chain with a reactive silicon end containing 1 to 3 leaving groups. The perfluorinated silane layer is covalently bonded to an underlying oxide layer and the outer surface is treated with an atmospheric-pressure plasma treatment. The resultant barrier coating exhibits corrosion resistance attributed to perfluorinated silanes but with enhanced bonding/adhesion properties.
Abstract:
A system for controlled motion of circuit components to create reconfigurable circuits comprising: a support; a substrate operatively associated with the support; actuators operatively associated with the support configured to physically move circuit components and to move the circuit components into physical and electrical contact with the substrate; the substrate comprising at least one conductive segment arranged to electrically connect circuit components when electrical contacts of circuit components are placed in contact with at least one conductive segment; and control circuitry configured to control the first and second actuators to thereby position the circuit components relative to the substrate; whereby circuit function is determined by the selection of circuit components and the location and orientation of circuit components relative to the substrate and conductive segments to create a reconfigurable circuit.
Abstract:
Embodiments of the present invention are directed to systems and methods for continuously sampling particles from air. In one embodiment, a system for continuously sampling particles from air may include: an airflow system configured to continuously draw air including airborne particles into the system; a photophoretic trap that uses photophoretic forces of a laser beam to trap one or more of the airborne particles from the drawn air; a measurement device configured to measure one or more properties of the trapped one or more airborne particles; and a controller configured to repeatedly trap, measure and release one or more airborne particles.
Abstract:
A method of substantially offsetting polarization charges in an electronic device having a heterobarrier comprising providing a substrate; providing at least one pair of stacks of semiconductor materials; one of the pair of stacks having one or more of spontaneous and piezoelectric polarity where the total polarization charge is opposite to the other of the pair of stacks; whereby due to the opposing polarities, the polarization is balanced and the pair of stacks operate to store electrical energy.
Abstract:
According to embodiments, an optically-actuated mechanical device comprises at least one deformable section formed of: an element including an intrinsic stress differential or gradient, the stress tending to urge deformation of one portion relative to another portion; and an optically-sensitive material which is configured to (i) initially prevent deformation of the device, and (ii) upon sufficient heating by absorbing optical energy allows the element to deform. The devices may be incorporated into various devices and apparatuses for select, non-contact actuation using only optical energy, for example, via light, from one or more lasers. Methods for fabricating and actuating such devices are also disclosed.
Abstract:
A method for image processing comprising providing an opening for entrance of light; the light being capable of being formed into an image; providing at least one optical element in an optical train configured to focus light; providing a variable aperture operatively associated with the at least one optical element; the variable aperture being placed in the optical train at an image plane and comprising mask settings for shielding portions of the light; providing an imager; providing at least one processor operatively connected to the variable aperture and imager; the at least one processor configured to control the passage of the light through the variable aperture; selectively masking portions of light using the mask settings of the variable aperture; obtaining image results using the settings; comparing image results obtained by the mask settings, and determining the phase correction that provides the optimal image results.
Abstract:
An optical filter for use in high temperature and rapid changing temperature environments, and method of making the same is provided. The optical filter includes a substrate and a filter layer disposed on the substrate. The filter layer has a porous columnar micro-structure configured to decouple the thermal expansion stress between the substrate and the filter layer when the optical filter is subjected to high temperature. The filter layer may be formed of a material conducive to physical vapor deposition, such as metallic oxide. The filter layer is deposited onto the substrate at an angle.
Abstract:
According to some embodiments, system and methods for image improvement comprise: receiving a plurality of frames of a given region of interest, the frames comprised of a plurality of pixels; determining, based on a quantum property of the frames, a normalized pixel intensity value for each pixel of each of the plurality of frames; and generating an improved image of the given region of interest based on the plurality of frames and the corresponding normalized pixel intensity values for the frames, the order of the image being two. Also embodiments for generating an image of a target illuminated by quantum entangled particles, such as, photons, are disclosed.