19438results about How to "Easy to measure" patented technology

The invention relates to an instrument for surgery, in particular minimally invasive surgery. The instrument includes means for feeding back a force which is exerted on the working element of the instrument to the operating element. These means include at least a first force sensor for measuring the force which is exerted on the working element, a control unit and a first actuator. On the basis of a signal which originates from the first force sensor, the control unit controls at least the first actuator in order to control the operating element. Furthermore, the means preferably include a first position sensor for measuring a position of the working element with respect to the frame. The control unit advantageously determines an impedance which the working element is subject to as a result of the presence of a tissue or the like, on the basis of which impedance the control unit controls at least the first actuator.

A biosensor comprises a space part for sucking and housing a sample formed of two upper and lower plates, the two plates being stuck together by an adhesive layer, the space part for sucking and housing the sample being constituted so as to be partially opened in the peripheral part and partially closed by the adhesive layer, and has a working electrode having at least glucose oxidase immobilized thereon and a counter electrode on the same plane of the plate.

A signal processor generates basis functions and identifies at least one basis function component of a sensor signal in order to calculate a physiological measurement. The signal processor is advantageously applied to pulse oximetry so as to directly calculate oxygen saturation and so as to calculate a robust oxygen saturation measurement. In particular, a signal component transform may be calculated within a window around a derived pulse rate estimate. A signal component transform may also utilize sinusoidal basis functions, and an optimization of a signal component transform may occur at a particular frequency or a set of frequencies. A sinusoidal waveform or waveforms at that frequency or set of frequencies is generated to select associated red and infrared components of the sensor signal, and an oxygen saturation is calculated from a magnitude ratio of these components.

The invention relates to an instrument for surgery, in particular minimally invasive surgery. The instrument includes means for feeding back a force which is exerted on the working element of the instrument to the operating element. These means include at least a first force sensor for measuring the force which is exerted on the working element, a control unit and a first actuator. On the basis of a signal which originates from the first force sensor, the control unit controls at least the first actuator in order to control the operating element. Furthermore, the means preferably include a first position sensor for measuring a position of the working element with respect to the frame. The control unit advantageously determines an impedance which the working element is subject to as a result of the presence of a tissue or the like, on the basis of which impedance the control unit controls at least the first actuator.

Guided wave radar (GWR) pulses are launched onto an electromagnetic guide wire using a compact launcher that includes an impedance matching element. The impedance matching element produces reflections that cancel launcher reflections. Short range echoes can be accurately detected after impedance matching. GWR operation in small tanks and in tanks containing low dielectric constant materials, such as propane, can be enhanced with the compact impedance-matched launcher.

A system for determining a biologic constituent including hematocrit transcutaneously, noninvasively and continuously. A finger clip assembly includes including at least a pair of emitters and a photodiode in appropriate alignment to enable operation in either a transmissive mode or a reflectance mode. At least one predetermined wavelength of light is passed onto or through body tissues such as a finger, earlobe, or scalp, etc. and attenuation of light at that wavelength is detected. Likewise, the change in blood flow is determined by various techniques including optical, pressure, piezo and strain gage methods. Mathematical manipulation of the detected values compensates for the effects of body tissue and fluid and determines the hematocrit value. If an additional wavelength of light is used which attenuates light substantially differently by oxyhemoglobin and reduced hemoglobin, then the blood oxygen saturation value, independent of hematocrit may be determined. Further, if an additional wavelength of light is used which greatly attenuates light due to bilirubin (440 nm) or glucose (1060 nm), then the bilirubin or glucose value may also be determined. Also how to determine the hematocrit with a two step DC analysis technique is provided. Then a pulse wave is not required, so this method may be utilized in states of low blood pressure or low blood flow.

Alignment accuracy between two or more patterned layers is measured using a metrology target comprising substantially overlapping diffraction gratings formed in a test area of the layers being tested. An optical instrument illuminates all or part of the target area and measures the optical response. The instrument can measure transmission, reflectance, and / or ellipsometric parameters as a function of wavelength, polar angle of incidence, azimuthal angle of incidence, and / or polarization of the illumination and detected light. Overlay error or offset between those layers containing the test gratings is determined by a processor programmed to calculate an optical response for a set of parameters that include overlay error, using a model that accounts for diffraction by the gratings and interaction of the gratings with each others' diffracted field. The model parameters might also take account of manufactured asymmetries. The calculation may involve interpolation of pre-computed entries from a database accessible to the processor. The calculated and measured responses are iteratively compared and the model parameters changed to minimize the difference.

A constraining sheath for use around an endoprosthesis (e.g., a stent device, with or without a graft covering), which may be a balloon expandable endoprosthesis but more preferably is a self-expanding prosthesis. The endoprosthesis is coaxially enclosed within and substantially covered by the constraining sheath, which is an outer, removable tubular sheath, preferably made of ePTFE. The sheath is preferably corrugated circumferentially along at least a portion of the length of the endoprosthesis. The constraining sheath and endoprosthesis are preferably mounted together as an assembly at the distal end of a delivery means such as a catheter shaft, for delivery of the endoprosthesis to a desired location within a body conduit such as an artery. The constraining sheath is removed by the application of tension to a tensile member such as a tether to cause sequential pulling out of the corrugations followed by release and deployment of the endoprosthesis. The use of a corrugated constraining sheath in comparison to a non-corrugated sheath results in a more smoothly applied tensile force to effect the endoprosthesis release as well as requiring less maximum force.

The invention relates to an impulse chamber which can be used for expelling an amount of a fluid compound at a high pressure. The impulse chamber comprises a variable-volume impulse chamber adapted for containing a volume of a flowable drug, an outlet nozzle in fluid communication with the impulse chamber and being adapted to be arranged against the skin of a subject, and a fluid inlet in fluid communication with the impulse chamber. The impulse chamber is defined substantially by a deformable chamber portion, such that deformation thereof reduces the volume of the cavity. In an exemplary embodiment the compressible chamber portion is in the form of an elastomeric tube, this providing a simple, yet reliable and cost-effective impulse chamber unit.

An organic light emitting diode (OLED) display includes an array of OLEDs, each OLED having two terminals; a voltage sensing circuit for each OLED including a transistor in each circuit connected to one of the terminals of a corresponding OLED for sensing the voltage across the OLED to produce feedback signals representing the voltage across the OLEDs; and a controller responsive to the feedback signals for calculating a correction signal for each OLED and applying the correction signal to data used to drive each OLED to compensate for the changes in the output of each OLED.

An optical system for examination of biological tissue includes a light source, a light detector, optics and electronics. The light source generates a light beam, transmitted to the biological tissue, spaced apart from the source. The light detector is located away (i.e., in a non-contact position) from the examined biological tissue and is constructed to detect light that has migrated in the examined tissue. The electronics controls the light source and the light detector, and a system separates the reflected photons (e.g., directly reflected or scattered from the surface or superficial photons) from the photons that have migrated in the examined tissue. The system prevents detection of the “noise” photons by the light detector or, after detection, eliminates the “noise” photons in the detected optical data used for tissue examination.

An ozone gas concentration measurement method that can easily measure the concentration of ozone gas. A process gas containing ozone gas is produced from a raw gas containing oxygen gas. The number of moles of gas molecules contained in the process gas is measured. The concentration of the ozone gas contained in the process gas is calculated based on the number of moles of gas molecules contained in the process gas.

The present invention generally relates to methods and systems for (i) skin assessment based on the utilization of bioimpedance and fractional calculus and implementation of methods for skin hydration assessment based on the utilization of bioimpedance and fractional calculus and systems thereof, (ii) an Opto-Magnetic method based on RGB and gray images data as “cone-rods” principles with enhanced qualitative and quantitative parameters for analyzing water based on Opto-Magnetic properties of light-matter interaction and systems thereof, and (iii) imaging and analyzing skin based on the interaction between matter and electromagnetic radiation and implementation of an Opto-Magnetic method with enhanced qualitative and quantitative parameters for imaging and analyzing skin based on Opto-Magnetic properties of light-matter interaction and systems thereof.

Alignment accuracy between two or more patterned layers is measured using a metrology target comprising substantially overlapping diffraction gratings formed in a test area of the layers being tested. An optical instrument illuminates all or part of the target area and measures the optical response. The instrument can measure transmission, reflectance, and / or ellipsometric parameters as a function of wavelength, polar angle of incidence, azimuthal angle of incidence, and / or polarization of the illumination and detected light. Overlay error or offset between those layers containing the test gratings is determined by a processor programmed to calculate an optical response for a set of parameters that include overlay error, using a model that accounts for diffraction by the gratings and interaction of the gratings with each others' diffracted field. The model parameters might also take account of manufactured asymmetries. The calculation may involve interpolation of pre-computed entries from a database accessible to the processor. The calculated and measured responses are iteratively compared and the model parameters changed to minimize the difference.

An integrated circuit device comprising: a circuit which uses encryption; and an encapsulation packaging layer; in which the circuit is responsive to at least one physical parameter of the encapsulation to apply the encryption and / or decryption by reading the key therefrom, so that tampering with the encapsulation to gain access to the circuit causes the encryption and / or decryption to fail.

The present invention provides tools and methods designed to aid in the placement of facet joint prosthesis at virtually all spinal levels. One aspect of the present invention is a measurement tool for installing a cephalad facet joint prosthesis including a fixation measurement element and a support arm element. This measurement tool assists in the selection and / or configuration of a cephalad facet joint prosthesis for implantation in a patient. Another aspect is a measurement tool for installing a caudal facet joint prosthesis including a stem element and a trial caudal bearing surface element. This measurement tool assists in the selection and / or configuration of a caudal facet joint prosthesis for implantation in a patient. Yet another aspect is a measurement tool holder including a measurement surface connected to a holder element. This tool holder assists in determining the measurements obtained with the caudal facet joint prosthesis measurement tool.

The data from several sensors can be measured to provide improved measurement of surgical workflow. The data may comprise times at which needles are removed from suture packs and placed in receptacles. The surgical workflow data may comprise data from several instruments such as removal and placement time of surgical instruments and electrocautery devices. The data from several sensors can indicate vital statistics of a patient or environmental conditions of an operating room. The data from several sensors can indicate the presence, absence, arrival, or departure of one or more actors in a surgical workflow. The data from several sensors can be registered with a common time base and a report generated. The report can indicate a performance of individuals and groups of participants in a surgical workflow.

A system and method for using a common subchannel to assess operating characteristics of one of a plurality of transducers that are coupled to said subchannel is disclosed. The plurality of transducers are divided into subsets and each subset is coupled to a subchannel. The system is configured to activate a selected transducer on the subchannel and the subchannel delivers operational information on the activated transducer. The present invention reduces the number of subchannels required to collect information on the plurality of transducers. The present invention may utilize one or more loading conditions to take at least one measurement, which at least one measurement is then used to derive operational information on the transducer. In one configuration, information on the amount of energy being delivered to the transducer is collected simultaneously with information on the operating temperature. In another embodiment only the temperature is measured. The present invention permits a more compact ablation device to be constructed based on the invention's ability to reduce the total number of subchannels required to collect transducer information.

The present invention is directed to a method and an apparatus for analysis of an analyte. The method involves providing a zero-mode waveguide which includes a cladding surrounding a core where the cladding is configured to preclude propagation of electromagnetic energy of a frequency less than a cutoff frequency longitudinally through the core of the zero-mode waveguide. The analyte is positioned in the core of the zero-mode waveguide and is then subjected, in the core of the zero-mode waveguide, to activating electromagnetic radiation of a frequency less than the cut-off frequency under conditions effective to permit analysis of the analyte in an effective observation volume which is more compact than if the analysis were carried out in the absence of the zero-mode waveguide.

An overlay target for spectroscopic measurement includes at least two diffraction gratings, one grating overlying the other. The diffraction gratings may include an asymmetry relative to each other in order to improve resolution of the presence as well as the direction of any mis-registration. For example, the asymmetry between the two diffraction gratings may be a phase offset, a difference in pitch, line width, etc. The overlay target may be spectroscopically measuring, for example, using an optical model and a best fit analysis. Moreover, the overlay target may be optimized by modeling the overlay target and adjusting the variable parameters and calculating the sensitivity of the overlay target to changes in variable parameters.

A method for combining measurements from two or more independent measurement channels, particularly physiological measurements such as heart rate. Independent measurements of heart rate, for instance by ECG and pulse oximetry, can be combined to derive an improved measurement eliminating artefacts on one channel. A model of the process generating the physiological parameter, e.g., the heart rate, is constructed and is run independently for each channel to generate predictions of the parameter. The measured values are compared with the predicted values and the differences are used as an indication of the confidence in the measurement. The measurements from the two channels are ombined using weights calculated from the respective differences.

A method for padding, filtering, denoising, image enhancing and increased time-frequency acquisition is described for digitized data of a data set where unknown data is estimated using real data by adding unknown data points in a manner that the padding routine can estimate the interior data set including known and unknown data to a given accuracy on the known data points. The method also provides filtering using non-interpolating, well-tempered distributed approximating functional (NIDAF)-low-band-pass filters. The method also provides for symmetric and / or anti-symmetric extension of the data set so that the data set may be better refined and can be filtered by Fourier and other type of low frequency or harmonic filters.

An embodiment method for power control in a multi-hop communications system includes transmitting a power usage pattern for each relay node in a subset of relay nodes served by a communications controller, where the power usage pattern specifies transmit power levels for the relay node while the relay node is operating in a power control mode. The method also includes receiving channel measurements of access links between the relay nodes in the subset of relay nodes and subscriber equipment served by the relay nodes, determining backhaul link transmit power levels and access link transmit power levels based on the channel measurements of access links and channel measurements of backhaul links between the communications controller and the relay nodes, and transmitting the access link power levels to the subset of relay nodes.

An object of the present invention is to provide a touch panel having a press detection function, which makes it possible to suppress degradation of visibility of a display unit of a display device even when mounted on an electronic device, and also to improve a pressure measuring precision. For this purpose, the touch panel of the present invention includes a first substrate, a second substrate disposed oppose to the first substrate, a pair of electrodes disposed on either one of opposed surfaces of the respective substrates or disposed separately on both of the surfaces, pressure sensitive ink members disposed with a gap from at least one of the pair of electrodes, each of the pressure sensitive ink members having an electrical characteristic varied by a pressing force applied thereto, and a gap retaining member for bonding the first and second substrates to each other and for retaining a gap between each of the pressure sensitive inks and at least one of the pair of electrodes, wherein the pair of electrodes are disposed in a frame shape along an edge portion of the first or second substrate, and the pressure sensitive ink members are scattered along the edge portion of the first or second substrate so that, when the first or second substrate is deformed upon an application of an external force, at least one of them is made in contact with both of the pair of electrodes so as to make the two electrodes conductive to each other.

A method and system are presented for determing a line profile in a patterned structure, aimed at controlling a process of manufacture of the structure. The patterned structure comprises a plurality of different layers, the pattern in the structure being formed by patterned regions and un-patterned regions. At least first and second measurements are carried out, each utilizing illumination of the structure with a broad wavelengths band of incident light directed on the structure at a certain angle of incidence, detection of spectral characteristics of light returned from the structure, and generation of measured data representative thereof. The measured data obtained with the first measurement is analyzed, and at least one parameter of the structure is thereby determined. Then, this determined parameter is utilized, while analyzing the measured data obtained with the second measurements enabling the determination of the profile of the structure.

The present invention provides multifunctional magnetic nanoparticle probe compositions for molecular imaging and monitoring, comprising a nucleic acid or polypeptide probe, a delivery ligand, and a magnetic nanoparticle having a biocompatible coating thereon. The probe compositions may further comprise a fluorescent or luminescent resonance energy transfer moiety. Also provided are compositions comprising two or more such multifunctional magnetic nanoparticle probes for molecular imaging or monitoring. In particular, the nucleic acid or polypeptide probes bind to a target and generate an interaction observable with magnetic resonance imaging (MRI) or optical imaging. The invention thereby provides detectable signals for rapid, specific, and sensitive detection of nucleic acids, polypeptides, and interactions thereof in vivo.

The state estimator provides parametric estimates for operating states not readily measurable with production powertrain and driveline hardware, such as real-time torque values of axles and dampers. This facilitates implementation of torque oscillation damping control schemes which use multivariable feedback. A control parameter is estimated for a powertrain system having multiple torque-generative devices operably connected to a transmission device having a torque output to a driveline. This includes establishing a plurality of equations operable to estimate the control parameter and other operating parameters based upon torque inputs. The operating parameters comprise operating speeds of the powertrain system and driveline. The operating parameters that comprise operating speeds of the powertrain system and driveline are determined. Coefficients of the plurality of equations are adjusted based upon the operating speeds of the powertrain system.