摘要:
Polymer composites directed to single wall carbon nanotubes (SWNT) dispersed within poly(methyl methacrylate) (PMMA) and their methods of synthesis. Composites of the present invention are also formulated as films and spun coat onto desired substrates. Advantageously, both the composites and films of the present invention exhibit resistance to radiation.
摘要:
Polymer composites directed to single wall carbon nanotubes (SWNT) dispersed within poly(methyl methacrylate) (PMMA) and their methods of synthesis. Composites of the present invention are also formulated as films and spun coat onto desired substrates. Advantageously, both the composites and films of the present invention exhibit resistance to radiation.
摘要:
An aircraft engine face radar cross section analysis is computed using a finite element based approach. A finite element model is only created for a periodic slice of the aircraft engine face. The system matrix of the finite element model is then transformed into a series of independent modes in a block diagonal matrix using a Discrete Fourier Transform. Each of the independent modes is then solved using an “infinite” pipe arrangement to remove the effects of rim scattering and the incident wave. The solved independent modes are summed together to determine the scattered electromagnetic field for the aircraft engine face. The scattered electromagnetic field is then used to calculate the radar cross section of the aircraft engine face.
摘要:
Polymer composites directed to single wall carbon nanotubes (SWNT) dispersed within poly(methyl methacrylate) (PMMA) and their methods of synthesis. Composites of the present invention are also formulated as films and spun coat onto desired substrates. Advantageously, both the composites and films of the present invention exhibit resistance to radiation.
摘要:
The perception of sound in the absence of a stimulus external to one's own ear is commonly referred to as “tinnitus”. However, other sounds such as otoacoustic emissions, may occur in the absence of an external stimulus. These sounds may be audible or inaudible. A means of reducing such sounds is presented. For the audible case, the device first measures the sound and then injects a sound of proper frequency content thus canceling the tinnitus or otoacoustic emission. The inaudible case requires other means of sensing the perceived sound. Suppression of the noise perceived by one suffering from inaudible tinnitus is outlined. Such a response may be processed similar to the microphone signal acquired for the audible case. Sound of proper frequency content is then injected into the affected ear and the neurological response due to the generated sound would then cancel the inaudible tinnitus.
摘要:
A shield for a MR magnet is provided comprising a cylindrical shell of magnetic material surrounding the MR magnet. The cylindrical shell is situated so that its longitudinal axis is coaxial with the magnetic axis of the MR magnet. Two disk shape end caps of magnetic material are secured to either end of the cylindrical shell. The end caps each define a central aperture extending longitudinally through the disk, with the radial extent of each of the apertures sized so that the perturbation of the field in the working volume of the MR magnet due to the cylindrical shell is compensated for.
摘要:
An apparatus comprising a conductive fabric configured integrate with a parachute, wherein when the conductive fabric is integrated with the parachute the conductive fabric is able to withstand packing, deployment and recovery of the parachute without damaging the parachute or the conductive network. A system comprising a conductive fabric configured to integrate with a parachute, wherein when the conductive fabric is integrated with the parachute the conductive fabric is able to withstand packing, deployment and recovery of the parachute without damaging the parachute or the conductive network. A method comprising arranging a conductive fabric to create a Faraday cage configured to integrate with a parachute, wherein when the conductive fabric is integrated with the parachute the conductive fabric is able to withstand packing, deployment and recovery of the parachute without damaging the parachute or the conductive network.
摘要:
An apparatus, method for making, and product by process for a parachute, the parachute having a conductive network and a set of fabrics; the conductive network including a set of conductive elements and a set of devices; wherein a first subset of conductive elements of the set of conductive elements is incorporated with a second subset of fabrics of the set of fabrics and third subset of devices of the set of devices incorporated is incorporated with a fourth subset of fabrics of the set of fabrics.
摘要:
Method and apparatus for coordinated control of lights and devices in an operating room. An operating room is equipped with a plurality of devices, each capable of generating light. A set of rules are provided defining the manner in which the plurality of devices are to be controlled in a cooperative, coordinated manner in accordance with the state of the operating room. The state of the operating room is detected, as such state changes from time to time during the course of a medical procedure being performed in the operating room. The plurality of devices are controlled in accordance with the detected state, as it changes from time to time, and the set of rules. The plurality of devices are thus controlled in a cooperative, coordinated manner in accordance with the changing state of the operating room.
摘要:
The invention uses tubes for the reduction of radiated duct noise. The tubes may be used to attenuate narrow band noise by diverting a portion of the acoustic energy through the tubes back into the duct. Upon reintroducing the diverted flow out of phase with the primary flow, acoustic cancellation is achieved. The frequency at which this occurs is dependent on the difference in the path lengths through the tubes and the separation distance—the distance separating the inlet and outlet of the tube. This invention can be used over varying frequency ranges by using an arrangement of flexible, constant length tubes. The effective frequency range is tailored by varying the separation distance and also allows the varying the angular arrangement of the tubes for more effective attenuation of spinning modes having varying propagation angle.