840 results about "Specific volume" patented technology

A method and system for the delivery of radiofrequency energy to the tissue, particularly, the prostate, to alleviate the symptoms of BPH is disclosed. The system incorporates a bipolar or multipolar electrode array to create an electric field where the heat created is confined solely to a specific volume of the prostate gland and therefore the heated tissue is defined only by the electrode geometry. The bipolar electrode array provides a variety of three dimensional, symmetric heating patterns within the prostatic tissue depending on the relative electrode lengths and angular separation. The system provides precision tissue temperature and impedance measurements thereby enabling the surgeon to accurately predict heating pattern performance and tissue response to RF heating.

An improved disposable glucose test strip for use in a test meter of the type which receives a disposable test strip and a sample of blood from a patient and performs an electrochemical analysis using a non-conductive integrated reagent / blood separation layer (17) containing a filler, an enzyme effective to oxidize glucose, e.g., glucose oxidase, and a mediator effective to transfer electrons from the enzyme. The integrated layer formulation is printed over a conductive carbon element (16) to form a working electrode. The filler, for example a silica filler, is selected to have a balance of hydrophobicity such that on drying it forms a two-dimensional network on the surface of the conductive element. The response of this test strip is essentially temperature independent over relevant temperature ranges and is substantially insensitive to the hematocrit of the patient.

Devices and methods for utilizing electromagnetic radiation and other forms of energy to treat a volume of tissue at depth are described. In one aspect, a device modulates the flux incident on surface tissue to control and vary the depth in the tissue at which an effective dose of radiant energy is delivered and, thereby, treat a specific volume of tissue. The methods and devices disclosed are used to perform various treatments, including treatments to relieve pain and promote healing of tissue.

Devices and methods for utilizing electromagnetic radiation and other forms of energy to treat a volume of tissue at depth are described. In one aspect, a device modulates the flux incident on surface tissue to control and vary the depth in the tissue at which an effective dose of radiant energy is delivered and, thereby, treat a specific volume of tissue. The methods and devices disclosed are used to perform various treatments, including treatments to relieve pain and promote healing of tissue.

This invention discloses a silicon carbon compound negative material and its preparation method for Li ionic batteries, which takes silicon and carbon phase compound particles as the base of sphericity or its like covered by a carbon layer. The preparation method includes: crushing the carbon phase particles to be mixed with silicon phase particles and sized to become a compound particle matrix to be covered with the precursor of the organic pyrolyzed carbon then to be carbonized and crushed. Compared with the current technology, this invention takes the compound material of Si and C phase particles as the matrix covered by a compound negative material, in which, the reversible specific volume of which is greater than 450mAh / g, the first circulation coulomb efficiency is greater than 85% and the volume holding rate for 200 times is greater than 80% to greatly reduce the volume effect of the Si activated material when absorbing and discharging Li and improve the diffusion performance of Li in activated materials.

Methods and devices for determining the concentration of a constituent in a physiological sample are provided. The blood sample is introduced into a test strip with portions of the blood sample being directed to both a first capillary and a second capillary. The first capillary configured to electrochemically determine a concentration of a first analyte in a blood sample by measuring a signal across a set of electrodes. The second capillary is configured to determine a hematocrit value of the blood sample by measuring a signal across a second set of electrodes.

The present disclosure is directed to a disposable absorbent article comprising a fluid permeable structured fibrous web, the fibrous web comprising thermally stable, fibers that are thermally bonded together using heat producing a base substrate that is thermally stable. The base substrate is textured via mechanical treatment producing a structured fibrous web having an aged caliper of less than 1.5 mm, a vertical wicking height of at least 5 mm, a permeability of at least 10,000 cm2 / (Pa·s) and a specific volume of at least 5 cm3 / g. The structured fibrous web provides optimal fluid wicking and the fluid acquisition capabilities and is directed toward fluid management applications.

In a method to determine a kidney function parameter of kidneys of an examination person with the aid of magnetic resonance tomography, at least one magnetic resonance measurement is implemented for an examination region of the examination person that comprises a urinary bladder of the examination person, to acquire magnetic resonance data from the examination region that include at least image data. The concentration of a urophanic substance in the urinary bladder of the examination person is automatically determined based on the acquired magnetic resonance data. A volume of the urinary bladder is automatically determined based on the acquired image data. A kidney function parameter of the kidneys of the examination person is automatically determined on the basis of the determined concentration of the urophanic substance in the urinary bladder and of the specific volume of the urinary bladder.

A method for determining the hematocrit of a blood sample is provided that includes the steps of: 1) depositing the sample into an analysis chamber operable to quiescently hold the sample for analysis, the chamber defined by the interior surfaces of first and second panels and a height extending there between, wherein both panels are transparent, and the height is such that at least some of the red blood cells within the sample contact both interior surfaces of the panels and one or more lacunae within the quiescent sample extend between the interior surfaces; 2) imaging at least a portion of the quiescent sample, which sample portion contains the red blood cells and one or more lacunae to determine an optical density of the imaged portion of the sample on a per image unit basis; 3) selecting and averaging the optical density values of the image units aligned with the red blood cells contacting the interior surfaces, and assigning an upper boundary value of 100% to the average optical density value of those image units; 4) selecting the optical density values of the image units aligned with the one or more lacunae, and assigning a lower boundary value of 0% to the optical density values of those image units; and 5) determining the hematocrit of the sample by assigning relative values to the optical density value of each image of the imaged sample portion as a function of the upper and lower boundary values, and averaging the relative values.

A beer dispensing system which measures beer flow by volume and electronically controls a valve to precisely dispense predetermined volumes of beer. To accurately measure liquid to be dispensed, a cellar valve is used to eliminate beer foam from the beer lines. Beer passes through a flow monitor which electronically relays volumetric information to a control panel. A user inputs a preset volume of beer desired and the control valve opens allowing a flow of beer. When the specific volume of beer has passed through the flow monitor, the control panel causes the control valve to close. This reduces waste and allows a user to attribute revenue to specific employees who electronically input information particular to beer dispensed.

A method and apparatus for controlling a fluid separation system in response to fluid pressure changes in a fluid flow, said method comprising the steps of sensing a fluid pressure; comparing the fluid pressure to a threshold value, and if the fluid pressure is below the threshold value, then pausing fluid flow for a selected period. During the selected period, either the fluid pressure sensed automatically resolves or the method further comprises a step of setting a fall alarm condition. The method and apparatus may further include interpreting a particular quantity of below threshold fluid pressure occurrences where the fluid pressure is below the threshold value occurring within a particular time period, and then, signalling an alarm. Threshold values may be calculated by the method or apparatus according to a formula such as the following:Threshold Value=Config+75−0.3309*Qin / (1−Hin)−0.3026*Qn / (1−Hn);where,Config=a configuration pre-selected pressure value;Qin=fluid flow rate in the inlet tubing line;Hin=Hematocrit in the inlet tubing line;Qn=fluid flow rate in the needle; andHn=Hematocrit in the needle.

The present invention is directed to a fluid permeable structured fibrous web comprising thermally stable, fibers that are thermally bonded together using heat producing a base substrate that is thermally stable. The base substrate is textured via mechanical treatment producing a structured fibrous web having an aged caliper of less than 1.5 mm, a vertical wicking height of at least 5 mm, a permeability of at least 10,000 cm2 / (Pa·s) and a specific volume of at least 5 cm3 / g. The structured fibrous web provides optimal fluid wicking and the fluid acquisition capabilities and is directed toward fluid management applications.

The present invention provides an ink-jet recording black ink containing at least water, a water-soluble organic solvent and a self-dispersible carbon black, and an ink-jet recording ink set and an ink-jet recording method using the ink-jet recording black ink. A volume mean diameter of dispersed particles contained in the black ink is in a range of 85 to 115 nm, and a volume of dispersed particles having a particle diameter of 0.5 to 1.0 μm contained in the black ink is in a range of 0.001 to 0.03% relative to a volume of the ink.

An image forming method and an image forming apparatus are disclosed in which an electrostatic latent image is formed on a photosensitive member surface by using a two-component developer including a toner and carrier. The photosensitive member surface has a specific modulus of elastic deformation and includes a charge transport layer with a specific thickness. The toner has a specific weight-average particle diameter. The carrier has a specific volume-average particle diameter and a specific circularity, and contains 20% by number or less of particles having a value of “average circularity−2σ” where σ is standard deviation of carrier circularity.

The invention discloses a detection method and system for leakage of a refrigerant of an air conditioner. The detection method comprises the steps of S10, acquiring the current running mode of the air conditioner, the current temperature of the outdoor environment and the current temperature of the indoor environment; S20, searching the normal refrigerant mass flow rate Q; S30, acquiring the current suction temperature tsuction and the suction pressure Psuction of a compressor; S40, searching the current suction specific volume Vsuction of the compressor; S50, calculating the current refrigerant mass flow rate QM; S60, judging whether the current refrigerant mass flow rate QM is smaller than the normal refrigerant mass flow rate Q; S70, if QM is smaller than Q, calculating the decrease percentage eta according to the formula that eta equals to (Q-QM) / Q%; and S80, comparing the eta with a preset percentage threshold value X. According to the detection method for leakage of the refrigerant of the air conditioner, the detection steps are decreased, the transmitted data is decreased, and accordingly detection faults are avoided, and the method is simple and reliable.

The invention relates to a preparation method of a manganese Li-NiCoMn ternary material for a lithium ion battery. The chemical formula of the manganese Li-NiCoMn ternary material is LiNixMnyCo(1-x-y)O2, wherein x is equal to 0.1 to 0.5, y is equal to 0.1 to 0.6, and 1-x-y is more than or equal to 0. According to the manganese Li-NiCoMn ternary material for the lithium ion battery, prepared by the method, the volume ratio capacity of a final product is increased by improving the density of a NiCoMn ternary precursor material, the high-temperature performance of the Li-NiCoMn is improved through composite cladding, and the problems that the Li-NiCoMn is poor in high-temperature cycle performance and poor in storage performance can be solved. Advantages such as high compaction density, large specific volume, good cycle performance, stability in quality, low cost, simplicity in preparation process and easiness for realizing industrialization can be realized.

In a method and device for monitoring the physiologically effective radio-frequency exposure in at least one specific volume region of an examination subject in a magnetic resonance data acquisition scan in a magnetic resonance system, the magnetic resonance system having a radio-frequency antenna structure with a number of individually controllable radio-frequency signal channels for generation of radio-frequency field distributions in an examination volume including the examination subject, amplitude values are acquired that respectively represent, at specific acquisition points in time, a signal amplitude of the radio-frequency signals emitted or to be emitted via the radio-frequency signal channels in the course of the magnetic resonance measurement. Also, phase values are acquired that represent the phases of the appertaining radio-frequency signals at these points in time. Local exposure values are then determined on the basis of the amplitude values and phase values, these local exposure values respectively representing a physiological exposure that the radio-frequency pulses cause at the examination subject at a specific location at a specific time. Based on this, exposure control values are determined that are compared with predetermined exposure limit values. When an exposure limit values is reached or exceeded, a control signal is output.

In one embodiment, the present invention provides a method of forming a cellulose article having a specific volume of less than 3 cc / gm. The method includes the step of incorporating cellulose fibers with a compound, wherein the compound includes an aqueous dispersion. The aqueous dispersion may have at least one polymer selected from the group consisting of an ethylene-based thermoplastic polymer, a propylene-based thermoplastic polymer, and mixtures thereof; at least one polymeric stabilizing agent; and water. In certain embodiments, a combined amount of the at least one polymer and the at least one stabilizing agent comprises about 25 to about 74 volume percent of the aqueous dispersion.

The invention provides a low resistivity silicon carbide single crystal wafer for fabricating semiconductor devices having excellent characteristics. The low resistivity silicon carbide single crystal wafer has a specific volume resistance of 0.001 Ωcm to 0.012 Ωcm and 90% or greater of the entire wafer surface area is covered by an SiC single crystal surface of a roughness (Ra) of 1.0 nm or less.

The invention relates to a preparation method of graphene material of a supercapacitor. The preparation method comprises the following steps of: step one, preparation of expanded graphene, comprising the steps of placing 1-2 parts by weight of graphite oxide into a heating container, sealing the heating container, rapidly warming and heating for 30-120s, preparing 0.5-1 part by weight of the expanded graphene; and step two, preparation of activated graphene. The invention has the beneficial effects that the graphene material prepared by adopting the preparation method provided by the invention improves cellular structure of graphene on the basis that composition of the graphene is not changed, thus the graphene material is more beneficial to charge storage, the specific capacity of a graphene supercapacitor is improved, the specific volume of the supercapacitor in organic electrolyte reaches up to 200F / g, and energy density can reach up to 40Wh / kg; meanwhile, the preparation method provided by the invention has simple technological process and low cost.

The invention provides a composition whose porosity, pore size, pore connectivity, swelling agent concentration, and / or specific volume undergoes a change from a first value to a second value in response to an electromagnetic signal, the composition having a matrix material in which is distributed a magnetic material.

This invention is a method for determining a hematocrit value. The steps include applying a first pulse of potential excitation at a first frequency to a test strip containing a fluid sample. The method also includes applying a second pulse at a second frequency that is higher than the first frequency. Based on first and second impedance measurements associated with each pulse, a hematocrit value may be determined. Also, a concentration of an analyte contained within the fluid sample may be determined based on the hematocrit value.

The invention provides a preparing method of powder metallurgy tantalum powder and / or niobium powder. The method comprises the steps that (1) heat treatment sintering is conducted, wherein heat treatment sintering is conducted on raw tantalum powder and / or the niobium powder and after sintering is accomplished, cooling is conducted and then passivation is conducted so that a sintered block can be obtained; (2) hydrogenation and powder preparation are conducted, wherein the sintered block obtained through heat treatment is hydrogenated and powder is prepared so that the hydrogenated tantalum powder and / or the hydrogenated niobium powder can be obtained; (3) dehydrogenation and oxygen reduction are conducted, wherein reducibility metal is added to the hydrogenated tantalum powder and / or the niobium powder so that dehydrogenating and deoxygenating heat treatment can be conducted, and therefore a mixture of reducibility metallic oxide, residue reducibility metal, dehydrogenated and deoxidized tantalum powder and / or the niobium powder can be obtained; (4) acid pickling and impurity removal are conducted, wherein acid pickling and drying are conducted on a mixture obtained through dehydrogenation and oxygen reduction so that the tantalum powder and / or the niobium powder suitable for powder metallurgy can be obtained. The method is suitable for recycling and treating the waste tantalum powder and / or the niobium powder generated in the process of production of the high-specific-volume tantalum powder and / or the niobium powder for a capacitor so that the tantalum powder and / or the niobium powder suitable for powder metallurgy can be prepared, investment of needed devices is small, the adaptive capacity to raw materials is strong, the technological process is short, and the safety coefficient of the treatment process is high.

Cellulose powder having an especially excellent balance among moldability, fluidity and disintegrating property is provided. Cellulose powder having an average polymerization degree of 150-450, an average L / D (the ratio of the major axis to the minor axis) value of particles of 75 μm or less of 2.0-4.5, an average particle size of 20-250 μm, an apparent specific volume of 4.0-7.0 cm3 / g, an apparent tapping specific volume of 2.4-4.5 cm3 / g, and an angle of repose of 55° or less.