62 results about "Linear energy transfer" patented technology

An ablation catheter system including a radio frequency generator and an elongate catheter having an ablation element at the distal portion thereof The ablation element has at least one electrode electrically connected to the radio frequency generator and a shape memory component formed from a shape memory material. The shape memory component transforms the ablation element between a first straightened delivery configuration and a second deployed configuration. Thermal energy transfer between the electrode and the shape memory component transforms the shape memory component into the deployed configuration and places the electrode of the ablation element into contact with tissue at a treatment site. The transformation temperature of the shape memory material is a temperature above body temperature such that the transformation of the shape memory component is not activated by mere placement within the body but rather is activated by heat transfer from the electrodes.

The invention discloses a rotary ultrasonic machining device based on non-contact energy transfer. The rotary ultrasonic machining device based on non-contact energy transfer comprises a high-speed electric spindle, a primary side assembly fixed to the lower end of the high-speed electric spindle, an ultrasonic knife handle assembly composed of an ultrasonic knife handle and a secondary side assembly arranged on the periphery of the ultrasonic knife handle, and an ultrasonic power supply generator. The ultrasonic knife handle assembly is arranged at the lower end of the high-speed electric spindle, so that the secondary side assembly corresponds to the primary side assembly up and down. The ultrasonic power supply generator is connected with the primary side assembly. According to the rotary ultrasonic machining device based on non-contact energy transfer, the ultrasonic machining technology can be directly combined with existing computer numerical control (CNC) machining centers such as CNC engraving and milling machines, engraving and milling machines, high-gloss CNC machines and drilling and tapping centers, and original spindles do not need to be modified; non-contact energy transfer of ultrasonic waves is achieved through the primary side assembly and the secondary side assembly, and the rotation speed reaches 10,000 turns / min; in addition, the automatic knife switching function can be achieved by using an exiting magazine.

A method and apparatus for additive manufacturing that includes a nozzle and / or barrel for extruding a plastic material and a supply of polymeric working material provided to the nozzle, wherein the polymeric working material is magnetically susceptible and / or electrically conductive. A magneto-dynamic heater is provided for producing a time varying, high flux, frequency sweeping, alternating magnetic field in the vicinity of the nozzle to penetrate into and couple the working material to heat the material through at least one of an induced transient magnetic domain and an induced, annular current.

A system and method of wave energy transfer including the generation and capture of waves in a tank filled with liquid is disclosed. The wave energy transfer system comprises wave generation apparatus including a displacement block for generating the waves in the tank, and wave capture apparatus including a buoyancy block for capturing the waves to convert the wave motion and provide fluid flow. The wave capture apparatus may also include an artificial pump head for stabilizing the fluid flow provided by the buoyancy block of the wave capture apparatus. Testing apparatus including a tank filled with liquid and wave generation devices is also disclosed.

An ablation catheter system is provided. The ablation catheter system includes a radio frequency generator, and an elongate catheter having an ablation element at the distal portion thereof. The ablation element has at least one electrode electrically connected to the radio frequency generator and a shape memory component formed from a shape memory material. The shape memory component transforms the ablation element between a first straightened delivery configuration and a second deployed configuration. Thermal energy transfer between the electrode and the shape memory component transforms the shape memory component into the deployed configuration and places the electrode of the ablation element into contact with tissue at a treatment site. The transformation temperature of the shape memory material is a temperature above body temperature such that the transformation of the shape memory component is not activated by mere placement within the body but rather is activated by heat transfer from the electrodes.

An energy transfer system for absorbing, temporarily storing and releasing energy is disclosed. The described energy transfer system comprises (a) a first container containing a Phase Change Material, (b) a heat generation element, which is connectable to an external energy source and which is capable of charging the Phase Change Material with thermal energy, wherein energy provided by the external energy source is used, and a heat extraction element, which is connectable to an external heat engine and which is capable of extracting thermal energy from the Phase Change Material, wherein the external heat engine is capable of converting the extracted thermal energy into electric energy. It is further described an energy transfer arrangement comprising two of such energy transfer systems, and a method for absorbing, temporarily storing and releasing energy.

The present disclosure introduces a number of image compression schemes designed to optimize operational efficiency in laser scanning projectors. Contemplated compression modes include, but are not limited to, intra-frame energy transfer, inter-frame energy transfer, and combinations thereof. The image compression modes disclosed herein are equally applicable to native laser sources and synthetic sources, such as green lasers based on a non-linear wavelength conversion. In cases where multiple lasers are used together in a multi-color projection system, it will often be preferable to favor particular image compression modes for particular colors, particularly where image brightness is more readily attributable to one color, e.g., green, because of the spectral responsivity of the human eye.

A control system for a hybrid propulsion spacecraft, configured for transfer between low earth parking orbit (LEO) and a Lissajous L2 orbit (L2O), including a first control portion communicably connected to a high thrust (HT) engine portion of the hybrid propulsion spacecraft, a second control portion communicably connected to a low thrust high specific impulse (LT-HI) engine portion of the hybrid propulsion spacecraft, the first and second control portions being configured to control both the HT engine portion and the LT-HI engine portion to provide an optimal LEO to L2O transfer trajectory, wherein the optimal LEO to L2O trajectory includes an optimal LT-HI trajectory portion, selected from a stable manifold trajectory, and an optimal HT trajectory portion, and wherein the LT-HI trajectory portion and HT trajectory portion are configured for providing a combined optimal trajectory along the LEO to L2O transfer trajectory, and are optimized substantially simultaneously.

The present invention provides, in one aspect, a method of designing an integrated circuit 500. In this particular aspect, the method comprises reducing soft error risk in an integrated circuit 500 by locating a structure 526, 528 relative to a node 516 of the integrated circuit 500 to reduce a linear energy transfer associated with a sub-atomic particle 530, 532 into the node 516, such that the linear energy transfer does not exceed a threshold value associated with the integrated circuit 500.

The invention discloses a single-event transient injection simulation method for high-frequency circuits. The single-event transient injection simulation method includes creating a device model of transistors injected with heavy ions; solving equations of a numerical computation model of semiconductor devices to acquire an I-V characteristic curve of the device model; calibrating I-V characteristics of the device model; adding a single-even transient physical model caused by the heavy ions to the numerical computation model of the semiconductor devices; acquiring a time-varying curve of transient drain current of the transistors with different grid widths under different LET (linear energy transfer) values of the heavy ions and different drain bias conditions by means of numerical computation; creating a single-event transient characteristic database of the transistor according to the time-varying curve; and exchanging data between the single-event transient characteristic database of the transistors and a circuit model by the aid of a Verilog-A model of a circuit simulation program, and the like. The single-event transient injection simulation method has the advantages that single-event transient injection is implemented, and problems of long time consumption and difficulty in convergence in an existing device / circuit hybrid simulation method are effectively solved.

The present invention relates to a portable radiofrequency (RF) hyperthermia device having flexible applicator treatment electrodes for electric field capacitive coupled energy transfer, the device being useful for increasing the delivery of a systemically delivered drug at a localised target site. The portable RF device is suitable for use by a patient in their own home and the flexible applicator is a flexible, porous, light and easy to manipulate treatment electrode. The inventive device requires no specialist operator to ensure correct usage.

The present disclosure relates to a portable radiofrequency (RF) hyperthermia device having flexible applicator treatment electrodes for electric field capacitive coupled energy transfer, the device being useful for increasing the delivery of a systemically delivered drug at a localised target site. The portable RF device is suitable for use by a patient in their own home and the flexible applicator is a flexible, porous, light and easy to manipulate treatment electrode. The inventive device requires no specialist operator to ensure correct usage.

The invention describes a detection device that comprise nanostructures and which detection mechanism is based on the quantum confinement effects. The analyte species are sensed by measuring charge or / and energy transfer between the species and the nanostructures, which will be proportional to the overlap between the density of states distribution in the nanostructures and the density of states distribution in the targeted analyte species.

The invention discloses a multiphase excitation-total space pickup wireless energy transfer system and a control method therefor. Efficient and stable energy transfer can be obtained in the total space. According to the wireless energy transfer system, three working modes and an inversion power supply with adjustable phase are adopted for exciting three mutually-orthometric coils respectively; a systematic mathematic model is established based on a mutual inductance coupling theory theoretically; by analyzing the energy transfer efficiency of the system, the working mode of the excitation power supply and the phase relations, the maximum energy transfer efficiency regulation and control mechanism of the system is designed; the energy transfer efficiency of the system when the load coils are under different pose conditions is researched by combination with computer aided analysis software; the research result proves that the system, which is loaded under a random pose state, can always obtain the efficient and stable energy transfer efficiency; and in addition, the research result proves that the designed regulation and control mechanism is simple and effective.

Systems and methods directed to the art of therapeutic thermal compression are provided. A therapeutic device capable of providing various therapeutic stimuli, including thermal energy transfer and applied pressure. The therapeutic device has a heating / cooling system, a temperature moderating system, a compression system, and a control system which controls the amount of pressure applied, the degree of temperature applied, and the duration of each application of therapeutic stimuli.

The invention discloses a rotary adjustable alpha-source irradiation device which is characterized by comprising a bracket, a rotary platform erected on the bracket, a plurality of sample culture dishes arranged on the rotary platform, a liftable alpha-source irradiation mechanism erected on the bracket below the rotary platform, wherein the rotary platform is driven by a motor. The rotary adjustable alpha-source irradiation device is reasonable in design, the irradiation dose on the cell is adjusted by adjusting the height of the irradiation source, the rotation speed of the sample platform and the angle of a sample outlet, the fabrication cost is low, the irradiation device can perform the linear energy transfer (LET) irradiation in different doses, and different dosage rates, the irradiation dose is accurate and the irradiation controllability is good.

The present invention provides, in one aspect, a method of designing an integrated circuit. In this particular aspect, the method comprises reducing soft error risk in an integrated circuit by locating a structure, relative to a node of the integrated circuit to reduce a linear energy transfer associated with a sub-atomic particle, into the node, such that the linear energy transfer does not exceed a threshold value associated with the integrated circuit.

Delamination of a laminated multilayer stack is provided by generating a layer-specific energy distribution in the stack during delamination. A localized energy transferrer can generate localized heating, cooling heating, cooling, or other form of energy absorption or transmission, in a bonding layer of a multilayer stack. Localized energy transfer can include thermal energy transfer, such as heating and / or cooling, acoustic energy transfer, such as applying ultrasonic energy, electromagnetic energy transfer, such as applying laser light, directed microwaves, etc. Localized energy transfer can generate a layer-specific energy distribution that can weaken the bonding layer while reducing damage to other layers of the stack.

Any anomaly in energy transfer is appropriately diagnosed in a vehicle. The energy transfer system of a vehicle is provided with: an input energy computation means (e.g., the chemical energy of fuel computation means) for determining the input energy of the energy transfer system; an output energy computation means (e.g., the vehicle kinetic energy computation means) for determining the energy output of the energy transfer system; and a comparing means (e.g., the comparing means) for comparing the input energy with the output energy. Any anomaly in the energy transfer system (e.g., any anomaly in fuel efficiency) is determined based on the result of comparison by the comparing means.

The present invention relates to a compact, low power, radiation-hardened-by-design 8-channel analog multiplexer ASIC, a 0.25 μm complementary metal-oxide semiconductor (CMOS); a 500 krad total ionization dose and single event latchup which is greater than the linear energy transfer (LET) 120 MeV-sq. cm / mg; eight channels for 8-to-1 multiplexing; a three nanosecond break-before-make decoder; an active low enable pin; and an on-resistance of less than 500 ohms from input to output pads.

The X-ray phase-shift contrast imaging method and the system thereof are provided. The X-ray phase-shift contrast imaging method utilizes characteristic X-rays of high throughput irradiating at the target from different positions or with different focal positions so as to form different X-ray images. The X-ray images are compared to define the voxels and combined to obtain the 3-D X-ray image. By using X-ray phase-shift contrast for imaging the soft tissue, the level of the image contrast may be enhanced several orders of magnitude and the linear energy transfer of the high energy photon beam is greatly reduced. Hence, the radiation dose absorbed by the tissue may be greatly reduced.

This invention provides, in one aspect, a procedure to use optically transparent nanocrystalline quantum dots to absorb UV light. This absorption process leads to an energy transfer to a chemically bound and chelated lanthanide ion that may emit light in either the visible spectrum (400-700 nm) or in the near infrared (700-1600 nm). This invention also provides methods for the use of these taggant materials in inks and aerosols used to disperse the taggant.

It is an object of the invention to provide a stable and linear energy reference against a variation in an amount of electronic noise or the like. The present invention is an energy calibration method detecting irradiation of radiation with predetermined energy from a calibration radiation source using a plurality of radiation detectors having a peak value distribution whose mode and mean value are different and performing calibration so that mean values become identical within the peak value distributions of the respective radiation detectors obtained through irradiation of radiation with predetermined energy from the calibration radiation source.

The invention discloses an N-channel field effect transistor resistant to the single particle effect and a manufacturing method of the N-channel field effect transistor. The N-channel field effect transistor resistant to single particle effect comprises a semiconductor substrate, an epitaxial layer, a source region, a drain region and a grid electrode. A first threshold voltage injection region is arranged between the source region and the drain region. The periphery of the drain region is provided with a deep doping leakage region. A second threshold voltage injection region is arranged between the deep doping leakage region and the drain region. According to the N-channel field effect transistor resistant to single particle effect and the manufacturing method of the N-channel field effect transistor, a circle of the deep doping leakage region surrounds the periphery of the drain region of a traditional N-channel field effect transistor, and the additionally arranged deep doping leakage region can effectively assist the drain region in collecting electric charge after single particle conducts incidence on the sensitive drain region and generates the funneling effect, so that quantity of electric charge absorbed by the drain region and the absorbing time are reduced after the drain region is irradiated by the single particle, the single particle transient current pulse time and peak are reduced, certain transient voltage pulse generated by the single particle with the linear energy transfer value in an inverter chain, and irradiation resistance of a device is improved.

Integrated circuits as well as fabrication and operating methods are presented in which user circuitry of the IC is selectively disabled in response to detection of a single event latchup condition in a sensing circuit that is prone to latchup in response to ionic radiation at a specific linear energy transfer level.

The present invention provides, in one aspect, a method of designing an integrated circuit 500. In this particular aspect, the method comprises reducing soft error risk in an integrated circuit 500 by locating a structure 526, 528 relative to a node 516 of the integrated circuit 500 to reduce a linear energy transfer associated with a sub-atomic particle 530, 532 into the node 516, such that the linear energy transfer does not exceed a threshold value associated with the integrated circuit 500.

Systems and methods directed to the art of therapeutic thermal compression are provided. A therapeutic device capable of providing various therapeutic stimuli, including thermal energy transfer and applied pressure. The therapeutic device has a heating / cooling system, a temperature moderating system, a compression system, and a control system which controls the amount of pressure applied, the degree of temperature applied, and the duration of each application of therapeutic stimuli.

The invention discloses a composite nanometer oxygen sensing material capable of performing efficiently energy transfer, a preparation method and applications thereof, and belongs to the technical field of biological dissolved oxygen content fluorescence detection materials. According to the present invention, an amphiphilic silane-coated composite nanometer material loading platinum (II) MESO-tetra(pentafluorophenyl)porphine (PtTFPP), coumarin 6 (C6) and Fe3O4 nanoparticlses is prepared, wherein the red light emission intensity of the oxygen probe PtTFPP is increased through the resonance-based energy transfer due to the loading of the coumarin 6 (C6), such that the oxygen sensitivity is improved compared to the absence of the coumarin 6 (C6); by using the excitation of the light with thelong wavelength of 458 nm, the disadvantages of high noise, biological tissue injury and the like of the ultraviolet excitation can be reduced; the emission peak of C6 at 500 nm is not changed alongwith the change of the oxygen content while the emission peak of PtTFPP at 652 nm is weakened along with the increase of the oxygen content, such that the oxygen monitoring accuracy can be improved byusing the ratio fluorescence method; and by loading the Fe3O4 nanoparticlses, the functions of magnetic navigation, magnetic enrichment and the like can be additionally provided.

A superalloy substrate, such as a turbine blade or vane, is fabricated or repaired by laser beam welding to clad one or more layers on the substrate. Laser optical energy is transferred to the welding filler material and underlying substrate to assure filler melting and adequate substrate surface wetting for good fusion. Energy transfer is maintained below a level that jeopardizes substrate thermal degradation. Optical energy transfer to the filler and substrate is maintained uniformly as the laser beam and substrate are moved relative to each other along a translation path by varying the energy transfer rate to compensate for localized substrate topology variations.