Abstract: A method for visualization of electrophysiology information can include storing electroanatomic data (14) in memory, the electroanatomic data representing electrical activity on a surface of an organ over a time period. An interval within the time period is selected in response to a user selection (28). Responsive to the user selection of the interval, a visual representation (26) of physiological information for the user selected interval is generated by applying at least one method to the electroanatomic data (14). The visual representation (26) is spatially represented on a graphical representation of a predetermined region of the surface of the organ.

Abstract: Method for reducing the time needed to perform geophysical inversion by using simultaneous encoded sources in the simulation steps of the inversion process. The geophysical survey data are prepared by encoding (3) a group of source gathers (1), using for each gather a different encoding signature selected from a set (2) of non-equivalent encoding signatures. Then, the encoded gathers are summed (4) by summing all traces corresponding to the same receiver from each gather, resulting in a simultaneous encoded gather. (Alternatively, the geophysical data are acquired from simultaneously encoded sources.) The simulation steps needed for inversion are then calculated using a particular assumed velocity (or other physical property) model (5) and simultaneously activated encoded sources using the same encoding scheme used on the measured data. The result is an updated physical properties model (6) that may be further updated (7) by additional iterations.

Abstract: Method and system for more efficient checkpointing strategy in cross correlating (316) a forward (328) and backward (308) propagated wave such as in migrating (326) or inverting seismic data. The checkpointing strategy includes storing in memory forward simulation data at a checkpointed time step, wherein the stored data are sufficient to do a cross correlation at that time step but not to restart the forward simulation. At other checkpoints, a greater amount of data sufficient to restart the simulation may be stored in memory (314). Methods are disclosed for finding an optimal combination, i.e. one that minimizes computation time (1132), of the two types of checkpoints for a given amount of computer memory (1004), and for locating a checkpoint at an optimal time step (306, 1214, 1310). The optimal checkpointing strategy (1002) also may optimize (1408) on use of fast (1402) vs. slow (1404) storage.

Abstract: An improved method for reducing the accuracy requirements on the starting model when performing multi-scale inversion of seismic data (65) by local objective function optimization (64). The different scales of inversion are brought about by incorporating a low-pass filter into the objective function (61), and then decreasing the amount of high-frequency data that is filtered out from one scale to the next. Moreover, the filter is designed to be time varying, wherein the filter's low-pass cutoff frequency decreases with increasing traveltime of the seismic data being filtered (62). The filter may be designed using Pratt's criterion for eliminating local minima, and performing averages (or other statistical measure) of the period and the traveltime error only with respect to source and receiver location but not traveltime (63).

Abstract: Systems and methods can be utilized to visualize physiological data relative to a surface region (e.g., an organ) of a patient. A computer-implemented method can include storing electroanatomic data in memory representing electrical activity for a predetermined surface region of the patient and providing an interactive graphical representation of the predetermined surface region of the patient. A user input is received to define location data corresponding to a user-selected location for at least one virtual electrode on the graphical representation of the predetermined surface region of the patient. A visual representation of physiological data for the predetermined surface region of the patient is generated based on the location data and the electroanatomic data.

Abstract: Method for converting seismic data to obtain a subsurface model of, for example, bulk modulus or density. The gradient of an objective function is computed (103) using the seismic data (101) and a background subsurface medium model (102). The source and receiver illuminations are computed in the background model (104). The seismic resolution volume is computed using the velocities of the background model (105). The gradient is converted into the difference subsurface model parameters (106) using the source and receiver illumination, seismic resolution volume, and the background subsurface model. These same factors may be used to compensate seismic data migrated by reverse time migration, which can then be related to a subsurface bulk modulus model. For iterative inversion, the difference subsurface model parameters (106) are used as preconditioned gradients (107).

Abstract: Method for reducing the time needed to perform geophysical inversion by using simultaneous encoded sources in the simulation steps of the inversion process. The geophysical survey data are prepared by encoding (3) a group of source gathers (1), using for each gather a different encoding signature selected from a set (2) of non-equivalent encoding signatures. Then, the encoded gathers are summed (4) by summing all traces corresponding to the same receiver from each gather, resulting in a simultaneous encoded gather (Alternatively, the geophysical data are acquired from simultaneously encoded sources.) The simulation steps needed for inversion are then calculated using a particular assumed velocity (or other physical property) model (5) and simultaneously activated encoded sources using the same encoding scheme used on the measured data. The result is an updated physical properties model (6) that may be further updated (7) by additional iterations.

Abstract: Method for interpolating aliased seismic data to generate shot records at regular shot points. The method involves sorting the data into common offsets to obtain the finer sampling in the common-offset domain, then using DMO to transform the data to zero offset to eliminate azimuth and offset variations, from which densely sampled shot records are reconstructed by an efficient Log-Stretch Inverse Shot Record DMO. The method has ready application to techniques that benefit from input data that are regularly and densely sampled, such as 3-D surface related multiple elimination and shot record wave equation migration.

Abstract: A method is disclosed for converting light hydrocarbons to synthesis gas employing a reduced nickel alloy monolith catalyst which catalyzes a net partial oxidation reaction. Certain preferred catalysts comprise bulk Ni—Cr, Ni—Co—Cr or Ni—Rh alloy materials. A method of making a bulk nickel alloy catalyst includes depositing a combination of chromium and cobalt metals, or rhodium metal, onto a nickel metal substrate and then thermally diffusing the Cr and Co coating, or the Rh coating, into the atomic lattice of the nickel substrate to produce a bulk Ni—Co—Cr or Ni—Rh alloy monolith catalyst. Preferred 3—D catalyst configurations include perforated foil, metal gauze, metal foam and expanded metal. The catalysts are mechanically strong and self-supporting, and retain high activity and selectivity to carbon monoxide and hydrogen products under syngas production conditions of high flow rate, superatmospheric pressure and high temperature.

Abstract: Thermally integrated monolith catalysts active for catalyzing the oxidative conversion of methane to CO and H2 are disclosed. The composition and multi-layer configuration facilitates heat balancing between exothermic and endothermic reactions that take place in different sections of the monolith in a short contact time syngas reactor. The monolith comprises an active catalyst material supported by a multi-layer structure made of thin, porous metal pieces, the opposing faces of which are joined together at their perimeters. The metal pieces may be perforated disks made of at least two metals or metal oxides, and may also include a metal oxide coating.

Abstract: A method is disclosed for converting light hydrocarbons to synthesis gas employing a reduced nickel alloy monolith catalyst which catalyzes a net partial oxidation reaction to produce an effluent stream comprising carbon monoxide and hydrogen in a ratio of about 2:1 H2/CO. Preferred catalyst beds comprise a compositionally graded axial array, or stack, of Ni—Cr, Ni—Co—Cr, or Ni—Rh monoliths, and their manner of making is disclosed. The Ni alloy monolith catalysts are mechanically strong and retain high activity and selectivity to carbon monoxide and hydrogen products under syngas production conditions of high gas space velocity, elevated pressure and high temperature.

Abstract: A method and apparatus for directing electromagnetic energy may be used as a directed energy weapon, illuminator for an active sensor and/or guidance system, counter-measure, or to ignite a fusion weapon; as a beam expander; for power transmission by a beam; propulsion by a beam or inertial fusion; power generation from inertial fusion; telecommunication; or computer hardware. The method and apparatus direct electromagnetic energy from a source made up of an area or volume as opposed to a point. Electromagnetic energy of at least one wavelength is emitted first towards a defined surface and thence to a defining surface. Each surface is either everywhere reflective or refractive, and each point on the defined surface lies at a point of intersection of a pair of defining rays radiating from different points on or within the source. Each defining ray is of a defining wavelength.

Abstract: A combustion system wherein a defined uniform nonstoichiometric mixture of fuel and oxygen is made in a compartment outside a furnace zone and burned inside the furnace zone in a luminous flame while additional make up oxygen is provided into the furnace zone under conditions which avoid diminution of flame luminosity and high NO.sub.x generation.

Abstract: An endoscope including a disposable probe and a non-disposable focusing ocular. The probe comprises negative and positive gradient index of refraction objective elements and a transfer module.

Abstract: Recorded seismic traces are gathered into common offset groups. Within each group, the traces are arranged according to shot point number. Mean and standard deviations are determined for each trace. High frequency amplitude variations in the mean and standard deviations caused by variations in source strengths and receiver calibrations are removed to produce traces of low frequency amplitude variations representing subsurface geology or wave propagation effects.

Abstract: A method for providing oxidant into a combustion zone employing a thermal nozzle converting thermal energy into kinetic energy whereby a high injection velocity may be attained even at a low oxidant supply pressure and the injection velocity may be varied at any given supply pressure without changing nozzles or using an adjustable nozzle.

Abstract: An improved endoscope employing phase conjugate imaging principles includes a first transmissive member for transmitting light rays received at a distal tip of the endoscope to an intermediate filter location. A phase conjugate filter at the intermediate filter location redirects the rays, according to the precise inverse of their incoming direction, along a second transmissive member optically identical to the first. Rays exiting the endoscope bear the exact relation to one another as when entering the tip of the endoscope and may be imaged or displayed on an eyepiece or video screen.

Abstract: Method and apparatus for changing the direction of a fluid stream injected into a combustion zone wherein a flow of biasing fluid is provided to a high velocity fuel or oxidant stream in a perpendicular direction proximate the inlet of an outwardly tapered cavity, causing the fluid stream to be deflected toward a wall of the cavity and to flow in a direction along the wall by a pressure differential across the fluid stream.

Abstract: Combustion method and apparatus establishing coherent jet oxidant flow within a cavity recessed from the main combustion area enabling operation without need for water cooling.

Abstract: An article handling/supporting apparatus having a frame, a resolvable base attached to the frame, a turntable assembly mounted to the base, a main boom pivotally connected to the turntable assembly and a main article supporting arm pivotally connected to the main boom. Upon the release of a plurality of locking mechanisms, the turntable assembly is free to rotate while the main boom and the article support arm are free to move up and down. Once an operator has positioned the article handling/supporting apparatus in the desired location, the operator, by the release of a single button, can lock all of the movable components of the apparatus. In addition, fine adjustment of the components can be made from a single location by an operator even after the components have been locked in place.