527 results about "Change temperature" patented technology

Described herein are microprocessors, devices, and methods useful for sweat and / or temperature detection that correlate more closely with changes in amperometric or charge signals related to analyte amount or concentration. The present invention provides methods for the establishment of more accurate sweat and / or temperature thresholds and new methods of compensation, such as correcting for the effects of sweat and rapidly changing temperature on measured analyte values. The present invention reduces the number of skipped or unuseable readings provided by analyte monitoring devices during periods of sweating or changing temperatures. Further, the present invention provides methods for improving the accuracy of reported readings of analyte amount or concentration. In one aspect, the present invention provides passive collection reservoir / sensing devices used in combination with active collection reservoir / sensing devices for detection of sweat and / or temperature related parameters.

The present disclosure relates to wet wipe dispensing systems for dispensing wet wipes capable of changing temperature upon use. In one embodiment, the dispensing system includes a wet wipe container and a lotion container that is held in assembly with the wet wipe container that contains a lotion that is kept separate from the wet wipes until the wet wipe is dispensed from the wet wipe container. The lotion includes a microencapsulated delivery vehicle that contains a temperature change agent that is capable of generating a temperature change upon contact with an aqueous solution. Once the wet wipe is dispensed from the system, an applicating device can apply the lotion to the wet wipe to facilitate contact between the temperature change agent in the microencapsulated delivery vehicle and the aqueous solution of the wet wipe.

A semiconductor memory and a refresh cycle control method that reduce a standby current by properly changing a refresh cycle according to the temperature of the semiconductor memory. A temperature detection section detects the temperature of the semiconductor memory. A cycle change control section sends a cycle change signal for changing a refresh cycle when the temperature of the semiconductor memory reaches a predetermined cycle change temperature. A refresh timing signal generation section generates a refresh timing signal and changes the cycle of the refresh timing signal in response to the cycle change signal. A constant current generation circuit generates an electric current for generating the refresh timing signal. A low-temperature constant current setting circuit designates the level of the electric current generated in the case that the temperature of the semiconductor memory is lower than or equal to the cycle change temperature. A high-temperature constant current setting circuit designates the level of the electric current generated in the case that the temperature of the semiconductor memory is higher than the cycle change temperature.

A light valve such as an active matrix LCD between crossed polarizers, utilizing, for instance, individual transistors to control each “pixel area” of the LCD and storage elements to store video signal data for each pixel, with optically shielded “dead spaces” between pixels to eliminate electric field cross-talk and non-information-bearing light bleed-through, is illuminated with a bright independent light source which creates a video image projected via specialized projection optics onto an internal or external screen without distortions, regardless of the angle of projection onto the screen. Use of heat sinks, IR reflective coatings, heat absorbing optics, optional fluid and a thermistor controlled pixel transistor bias voltage injection servo circuit stabilizes image performance, maintaining accurate color and contrast levels as the LCD changes temperature. In one embodiment of the invention, use of a multi-color LCD with a stepped cavity, producing different thicknesses of LCD for the different wavelengths that pass through it, allows a linear correspondence between the wavelengths passing through the LCD to produce true black, high contrast and CRT-like color rendition. A dichroic mirror arrangement is used to overlap differently colored pixels in the projected image. Use of striped mirrors duplicate pixels, where necessary, eliminating spaces between pixels, creating a continuous image with no apparent stripes or dots. A special venetian-blind type of screen is also disclosed and methods for using the system to view three-dimensional video are also explained.

The invention relates to a temperature-controlled consolidation pressure chamber system used in thermal consolidation test of a saturated soil cylinder sample. Side walls (6) of the temperature-controlled consolidation pressure chamber are of empty-cavity structures made of stainless steel; cylinder thermal plates (8) are embedded in the side walls; the two ends of resistance wires of the cylinder thermal plates (8) of the pressure chamber are connected with a temperature controller (18); an electric couple (1) is arranged at the top cap of the pressure chamber, one end of the electric couple is arranged in the pressure chamber which is full of water and the output end is connected with the temperature controller. Sample water drain pipes, pipes for measuring pore water pressure and ambient pressure connection pipes are made of stainless steel and the middle sections take a shape of a spiral arranged in a water receptacle with a constant temperature; the sample drain pipe coming out of the water receptacle is connected with a pipe for detecting leakage of sample; the pipes for measuring pore water pressure are connected with a pore water pressure measuring system; the ambient pressure connection pipes are connected with a pressure regulating system. The system can satisfy the requirements of the saturated soil sample consolidation test under the action of loading at the changing temperature, thus the system can test the thermal consolidation deformation of the saturated soil sample accurately.

Provided is a natural convection-driven polymerase chain reaction (PCR) apparatus and method, which can periodically change temperature of a sample to make a natural convection-driven flow in a loop-shaped channel on a disposable polymer chip and contacting heating metal members maintained at different temperatures with channels. The natural convection-driven PCR apparatus includes: a polymer chip having a plurality of channels connected together to form a loop-shaped microchannel, a sample being filled inside the channels; a plurality of heating metal members contacting the loop-shaped microchannel of the polymer chip and transferring heat; a temperature controller connected to the heating metal members to maintain the heating metal members at different temperatures; a plurality of heaters connected to the heating metal members and the temperature controller to supply heat to the heating metal members; and temperature sensors connected to the heating metal members and the temperature controller.

The invention relates to a method and a device for measuring and representing the compression coefficient and the expansion coefficient of a material on line. A temperature sensor, a pressure sensor and an ultrasonic probe are respectively arranged on one cross section of a closed material cavity of a pressure-volume-temperature (PVT) calibration device and are used for testing the volume, the temperature T, the pressure P and ultrasonic signals of the closed material synchronously. The sound velocity of the ultrasonic wave, which passes through the material with the thickness l in the material cavity is c=l / delta t within the propagation time delta t; the temperature is maintained constant, and the pressure measurement volume is changed, so that a constant temperature compression coefficient can be obtained; the pressure is maintained constant, and the temperature measurement volume is changed, so that a constant pressure expansion coefficient can be obtained; a material specific volume, a compression coefficient or expansion coefficient and sound velocity correspondence curve is established, and a corresponding equation is obtained by regression; or the compression coefficient (alpha) and the expansion coefficient (beta) can be obtained by the specific volume curve or the state equation. At certain temperature and under certain pressure, the propagation velocity of the ultrasonic wave in the material can be tested on line, and the compression coefficient and the expansion coefficient at the temperature and under the pressure can be obtained by the established corresponding curve or corresponding equation. The method has the advantages of being lossless and being easy in online representation, and the device is simple and convenient to install.

The invention relates to a valve for opening and closing a channel (3) of a microfluidic system, respectively. According to the invention, the valve comprises an actuation medium (2) that undergoes a volume change with changing temperature; and a heater arrangement (5) for generating a temperature gradient in the actuation medium (2) with respect to the actuation medium's (2) distance relative to the channel (3); wherein due to an expansion or a contraction of the actuation medium (2) the channel (3) is closed or opened, respectively. When the heater arrangement (5) is activated in such a way that a higher temperature is generated in the actuation medium (2) which is nearer to the channel (3) and a lower temperature is generated in the actuation medium (2) which is further away from the channel (3) the valve can be closed and vice versa. Accordingly, such a valve for a microfluidic system is provided which can be reliably actuated during a long time of use.