94 results about "Thermal variation" patented technology

The present invention intends to provide particles for displaying images used in an image display device capable of displaying and eliminating repeatedly accompanied by flight and movement of particles utilizing Coulomb force, being superior in stability, particularly in repetition durability, memory characteristic stability, adaptability for temperature change, having capability of regulating charge amount, and accordingly, favorable images with sufficient contrast should be stably obtained. The present invention provides particles coated with a resin; specifying Span of particle diameter distribution, charge attenuation property, thermal change of the surface hardness, tensile break strength, Izod impact strength (with a notch), abrasion loss (Taber), tensile elastic modulus, flexural elastic modulus, or tear strength. The present invention also proposes about the structure of the particles.

Fibrous sheet materials, such as are useful as facial tissue, bath tissue and paper towels, for example, are provided with chemical agents, such as certain salts, which create a temperature change in the sheet when exposed to a particular stimulant, such as water, for example. These materials can provide a soothing feel to the user, either in the form of cooling or heating, depending upon the particular chemistry involved.

A computer system that schedules loads across a set of processor cores is described. During operation, the computer system receives thermal measurements from sensors associated with the set of processor cores, and removes noise from the thermal measurements. Then, the computer system analyzes thermal properties of the set of processor cores based on the thermal measurements. Next, the computer system receives a process to be executed, and schedules the process to be executed by at least one of the processor cores based on the analysis. This scheduling is performed in a manner that reduces spatial and temporal thermal variations in the integrated circuit.

Systematic use of infrared imaging characterizes marks made on items and identifies the particular marking tool with better accuracy than use of visual imaging. Infrared imaging performed in total darkness eliminates shadows, glint, and other lighting variations and artifacts associated with visible imaging. Although normally used to obtain temperature measurements, details in IR imagery result from emissivity variations as well as thermal variations. Disturbing an item's surface texture creates an emissivity difference producing local changes in the infrared image. Identification is most accurate when IR images of unknown marks are compared to IR images of marks made by known tools. However, infrared analysis offers improvements even when only visual reference images are available. Comparing simultaneous infrared and visual images of an unknown item, such as bullet or shell casing, can detect illumination-induced artifacts in the visual image prior to searching the visual database, thereby reducing potential erroneous matches. Computer numerically controlled positioning of the toolmark relative to imaging sensors which use fixed focus optics with shallow depth of focus, varying focus distance and orientation systematically to construct a sequence of images, maximizes reliability of resulting images and their comparisons.

A system that balances thermal variations within a set of computer systems in a datacenter. During operation, the system obtains a thermal flux map for the set of computer systems. The system then analyzes the thermal flux map to determine whether imbalances exist in the thermal flux across the set of computer systems. If so, the system can adjust: (1) the scheduling of loads across the set of computer systems, and / or (2) air conditioning within the datacenter, so that the thermal flux is more balanced across the set of computer systems.

Periodic biological functions and their related anatomy that cannot be seen in image sequences using typical means, can nonetheless be made visible by demodulating the image sequence according to the timing of that biological function using the described method. In particular, vascular structure and the function of that structure becomes observable when demodulated according to the patient's heart beat. This method suppresses the effects of thermal variations across the anatomy, and of severe scattering loss from buried tissues, that limit current thermographic (heat imaging) methods. It also measures localized changes in the wave front amplitude, shape, and phase, which are expected to prove useful for disease diagnosis and biometry.

A method for detecting chemical reactions uses a nanocalorimeter having a substrate including thermal isolation capability residing on the substrate, thermal equilibration regions residing within the thermal isolation capability, and thermal measurement capability residing within each of the thermal equilibration regions. The thermal measurement device is connected to detection electronics. The method includes depositing drops of potentially reactive chemical solutions within the thermal equilibration region. These potentially reactive solution drops are merged through the use of drop merging electrodes residing within the thermal isolation region. The thermal change occurring within the merged solution drops is then measured with the detection electronics.

Systematic use of infrared imaging characterizes marks made on items and identifies the particular marking tool with better accuracy than use of visual imaging. Infrared imaging performed in total darkness eliminates shadows, glint, and other lighting variations and artifacts associated with visible imaging. Although normally used to obtain temperature measurements, details in IR imagery result from emissivity variations as well as thermal variations. Disturbing an item's surface texture creates an emissivity difference producing local changes in the infrared image. Identification is most accurate when IR images of unknown marks are compared to IR images of marks made by known tools. However, infrared analysis offers improvements even when only visual reference images are available. Comparing simultaneous infrared and visual images of an unknown item, such as bullet or shell casing, can detect illumination-induced artifacts in the visual image prior to searching the visual database, thereby reducing potential erroneous matches.

A thermally stabilized, high speed, micrometer-scale silicon electro-optic modulator is provided. Methods for maintaining desired temperatures in electro-optic modulators are also provided. The methods can be used to maintain high quality modulation in the presence of thermal variations from the surroundings. Direct current injection into the thermally stabilized electro-optic modulator is used to maintain the modulation performance of the modulator. The direct injected current changes the local temperature of the thermally stabilized electro-optic modulator to maintain its operation over a wide temperature range.

An arrayed waveguide grating including a waveguide array extending between two free propagation regions is disclosed. One free propagation region is coupled to an input waveguide, and the other free propagation region is coupled to output waveguides. In an example, the input-side free propagation region has two sections that are moveable relative to one another. Movement is achieved by using, for example, a thermally responsive actuator that moves the input waveguide a desired distance to compensate for a temperature change. An arm formed of a low thermal expansion coefficient metal may be used as a thermally responsive actuator moving a substrate. In another example, both the input side and the output side free propagation regions have sections moveable relative to one another and, therefore, less movement is required to correct for thermal variations. An NxN arrayed waveguide grating may also be formed.

A method for controlling distortion of a turbine case ("case") includes measuring a temperature distribution for the case that includes thermal gradients. The method further includes modeling thermal stresses on the case induced by the thermal gradients, calculating an out of roundness index ("index") resulting from the thermal stresses, and comparing the index with at least one distortion limit to determine whether the case has a satisfactory or an unsatisfactory index. The temperature distribution is controlled for an unsatisfactory index to produce the satisfactory index. A system for controlling distortion of the turbine case includes a thermal measurement system, for measuring the temperature distribution, and a computer configured for modeling the thermal stresses, calculating and comparing the index with the distortion limit, and controlling the temperature distribution for an unsatisfactory index to produce the satisfactory index.

A hard disk drive and process of controlling the drive by adjusting disk drive parameters in accordance with ambient temperature. Various parameters affected by thermal variation are controlled to automatically adjust those values in order to compensate for changes in ambient temperature when an environment where a hard disk drive is installed changes, thereby allowing the hard disk drive to continuously operate with optimal performance. Those parameter, which are sensitive to the temperature of a hard disk drive, can be modified or controlled using the relationship therebetween in accordance with the current ambient temperature, thereby preventing any deterioration of the performance of the hard disk drive, even when temperature at the burn-in process and the current ambient temperature are different from each other.

System for the thermal monitoring of a territory, comprising a plurality of local devices installed on the territory to be monitored and having means for acquiring environmental data able to detect the presence of a significant thermal variation in the surrounding area, a central control station, comprising means for storing logistical-technical data and data about the available rescue means relating to the territory to be monitored, means for transmitting / receiving data between the central control station and the local devices, and means for the integrated processing of the environmental data acquired by the local devices and of the data stored in the central control station, able to provide at their output a model of evolution of the event and a plan of intervention for the extinction thereof.

A dome for a combustion chamber may have a plurality of effusion holes therein to provide efficient cooling while preventing carbon formation on the dome and chamber walls of the combustion chamber. Conventional dome cooling designs, using dome louvers, for example, may become corroded and / or may allow for ingestion of carbon particles that may build up and eventually separate from the dome. Furthermore, the dome cooling design of the present invention allows for the use of a lower profile dome as compared with conventional domes, thereby maximizing liner volume in the constrained combustion envelope while reducing combustor case weight. Additionally, the dome effusion cooling design of the present invention requires the use of less thermal barrier coating, as compared to conventional designs, in order to minimize thermal variation within the dome and between the dome and the combustor wall. A method for uniformly cooling a dome of a combustion chamber of an engine is also disclosed.

A thermal compensating apparatus and method for maintaining a relatively constant fluid pressure within a subterranean well tool of the type that is responsive to a source of actuation fluid for manipulating said tool at a location in a well to at least one of sealing and anchoring positions. A body includes a fluid chamber within the body for housing a substantially incompressible fluid for manipulating said tool to at least one of the positions. The fluid chamber is expandable and contractible, for example, through movement of a piston, in response to manipulation of the tool and thereafter in response to thermal variations of the fluid in the fluid chamber. An energy storage and release mechanism, for example, a compression spring, is responsive to pressure changes in the fluid chamber for expanding or contracting the fluid chamber in response to pressure variations in the fluid for maintaining the fluid at a relatively constant pressure.

Disclosed are a system and method for growing photosynthetic cells in conduit. The system and method supply light, CO2 and nutrients to the cells. The system and method also dampen thermal variations in the conduit.

A method for forming a pattern on a surface using charged particle beam lithography is disclosed, where the shots in an ordered set of input shots are modified within a subfield to reduce either a thermal variation or a maximum temperature of the surface during exposure by the charged particle beam writer. A method for fracturing or mask data processing is also disclosed, where an ordered set of shots is generated which will expose at least one subfield of a surface using a shaped beam charged particle beam writer, and where a temperature or a thermal variation generated on the surface during the exposure of one subfield is calculated. Additionally, a method for forming a pattern on a surface with an ordered set of shots using charged particle beam lithography is disclosed, in which a blanking period following a shot is lengthened to reduce the maximum temperature of the surface.

A bearing system (A) that supports a shaft (4) in a housing (2) includes two single row tapered roller bearings (6, 8) mounted in opposition. One of the bearings (8) compensates for thermal variations that would otherwise produce excessive preload in the system. It has a conventional cup (48) in the housing and tapered rollers (52) arranged in a single row along the raceway (54) of the cup. It also has a compensating assembly (50, 100, 110, 120, 130) on the shaft, and it includes a ribless cone (60) having a raceway (70) around which the rollers are organized, an axially displaceable rib ring (64) for positioning the rollers, a spring (66) for urging the rib ring against a stop surface (74) on the cone, and a compensating ring (68) formed from a material having a high coefficient of thermal expansion for displacing the rib ring against the force exerted by the spring when the temperature of the compensating assembly exceeds a prescribed set point temperature so as to reduce preload in the bearing system.

A switching voltage regulator provides a regulated voltage at an output terminal. The switching voltage regulator includes a MOS transistor having a non-drivable terminal coupled with the output terminal and a control circuit receiving a signal that is representative of the current signal flowing in the MOS transistor. The control circuit includes a compensation device adapted for cancelling the thermal variation of the signal that is representative of the current signal flowing in the MOS transistor.

Flexible circuitry is populated with integrated circuitry disposed along one or both of its major sides. Contacts distributed along the flexible circuitry provide connection between the module and an application environment. The circuit-populated flexible circuitry is disposed about an edge of a rigid substrate thus placing the integrated circuitry on one or both sides of the substrate with one or two layers of integrated circuitry on one or both sides of the substrate. The substrate form is preferably devised from thermally conductive materials and includes a high thermal conductivity core or area that is disposed proximal to higher thermal energy devices such as an AMB when the flex circuit is brought about the substrate. Other variations include thermally-conductive clips that grasp respective ICs on opposite sides of the module to further shunt heat from the ICs. Preferred extensions from the substrate body or substrate core encourage reduced thermal variations amongst the integrated circuits of the module.

A warming system for high pressure storage tanks for hydrogen and CNG gas fuel wherein a warming device is installed upon a tank port that is interconnected in thermal communication with a metal liner within the tank and heat derived from an on board vehicle heat source is transmitted by conduction from the tank port to the tank interior. Heating ameliorates mechanical stresses to the tank and the component parts of the tank assembly caused by the thermal conditions of the tank environment and thermal changes in gas temperature associated with the depletion of high pressure gas from the tank.