A method of searching for files located in a computer system, wherein each file has at least one of a plurality of fields, by creating a search query, selecting a subset of the fields for searching wherein the subset is selected independent of the search query, and processing the files by examining the content of only those fields included in the subset for matching against the query. The fields can be selected by using a default setting. Certain fields are ignored during the processing step. An...

A method for determining formation parameters such as the effective porosity (.phi..sub.e), the formation fraction of bulk volume that is shale (.rho.) and the formation matrix capture cross section (.SIGMA..sub.ma), utilizing predetermined thermal neutron capture cross sections of a first and a second injected fluid, and the thermal neutron capture cross sections of the formation flooded with the first injected fluid and subsequently flooded with the second injected fluid to determine the forma...

Apparatus for measuring the respiratory resistance of a patient has a passageway for the flow of air produced by the patient's exhalation and a valve for temporarily halting and then restoring the flow. The rate of flow following the temporary halting depends solely upon the respiratory resistance. Respiratory resistance is derived from circuitry responsive to signals representing pressure and rate of flow. The rate of flow is preferably derived from a comparison of the pressure within the appar...

Instrumentation particularly for measuring torque on a rotating shaft. The instrumentation includes an excitation source external of the shaft providing an output excitation signal with periodic electrical markers. The excitation signal with the electrical markers is coupled to shaft mounted electronics for energizing a strain gage bridge. An electronic switch mechanism is responsive to the periodic electrical markers in the excitation signal for alternately biasing and unbiasing the strain gage...

In spectrophotometric apparatus in which there are a plurality of operating parameters a system for selecting predetermined combinations of operating parameters is provided, having as many user operable main mode selection stations as there are main modes in the design range of the system and having a mode multiplying system which is adapted to modify, in response to the operative state of user operable control means, each main mode selected out of at least some of the main modes in the range, f...

A method and apparatus for producing a color strip display of eddy current test data from a signal produced by an eddy current detector and which varies in amplitude and in phase relative to a reference signal as the detector is displaced relative to a test body. In order to produce the display, a signal representative of the relative displacement of the detector, a signal representative of the amplitude of the detector signal, and a signal representative of the relative phase of the detector si...

Sensors, or transducers, which utilize elongated magnetically saturable tubes with sense lines that run through the tubes for simultaneous sensing of a plurality of parameters are disclosed. One version involves a single sensing element which has a first pair of diametrically disposed magnetic poles responsive to one condition that is positioned adjacent to one end of the tube and a second pair of diametrically disposed magnets responsive to another condition that is positioned adjacent to the o...

An apparatus for determining the size of elongated objects, specifically logs. The logs (4) are floated in a water filled canal (5) and advanced past a measuring device 13 by cranes 8 or water jets. The size of the logs is determined by radiation sensitive devices (21) actuated by light sources 22 or mechanical transducers (54, 55, 56, 57). In another embodiment the log is held stationary while the measuring device is moved longitudinally past the log.

Sensors, or transducers, which utilize elongated magnetically saturable tubes with sense lines that run through the tubes for simultaneous sensing of a plurality of parameters are disclosed. One version involves a single sensing element which has a first pair of diametrically disposed magnetic poles responsive to one condition that is positioned adjacent to one end of the tube and a second pair of diametrically disposed magnets responsive to another condition that is positioned adjacent to the o...

An apparatus for measuring temperature or, alternatively, for measuring the flow of thermal power to a substrate maintained at substantially constant temperature. In accordance with the invention there is provided a semiconductor substrate, such as a silicon substrate. A temperature sensing means is formed in the substrate and is operative to generate a first electrical signal as a function of the temperature of the substrate. Means are provided for generating a reference level, and a comparator...