摘要:
A system, method and computer program product provide a search module for searching digital data. The search module operates, according to an embodiment, by indexing stored data without interrupting use of the stored data, synchronizing the indexed data with data stored subsequent to the indexing step, searching at least one of the synchronized data and the indexed data, and outputting results of the searching step.
摘要:
An apparatus, system, and method are disclosed for efficient recovery of a database from a log of database activities. A log of database activities is filtered into a first sequential data set. The remainder portion of the log is sorted into a second sequential data set. The first sequential data set and the second sequential data set are merged and written to the database. Allowing the sequential records to bypass a sort operation reduces the amount of time and the system resource overhead required for database recovery.
摘要:
Novel polyethersulfone compositions have been discovered which incorporate structural subunits derived from sulfonated bis(halophenyl)sulfones, dihydroxy terphenyls, and/or bis(hydroxyphenyl)pyridines. The sulfonated polyethersulfones show promise as materials for use in polymer electrolyte membranes (PEMs) in fuel cells owing to their high proton conductivities (0.02-0.07 S/cm at 20° C. and 100 percent humidity). In addition, a novel unsulfonated thermoplastic polyethersulfone comprising structural subunits derived from a non-sulfonated bis(halophenyl)sulfone bis4-fluorophenyl)sulfone and 4,4′-dihydroxyphenyl-2,6-pyridine (CAS No. 171820-16-9) is disclosed.
摘要:
A low wear polyoxymethylene composition includes a polyoxymethylene matrix resin; from about 0.05 to about 3 weight percent of a high molecular weight polyethylene having an intrinsic viscosity of from about 3.5 dl/g to about 35 dl/g, with the provisos that the high molecular weight polyethylene is further characterized by either: (i) an intrinsic viscosity of less than about 10 dl/g; or (ii) a particle size, d50, of less than about 50 microns as provided to the composition. The composition also includes an oxidized polyolefin wax; and optionally includes one or more of additional lubricants, reinforcing agents and stabilizers. The compositions are useful for tribological applications and are used to make bearings, gears, cams, rollers, sliding plates, conveyor belt links, castors, fasteners, levers and the like.
摘要:
A modular sensor assembly for sensing conditions at a computer rack, such as environmental conditions. The sensor assembly includes an elongate flexible body, configured to attach to a computer rack, with a plurality of addressable sensors, disposed along the body and interconnected to a common connector wire. A connector wire lead is provided to interconnect the connector wire to a central system configured to receive and interpret data from the plurality of sensors relating to conditions associated with the computer rack.
摘要:
A flexure mechanism for an interface device that interfaces a user with a computer system. An interface device includes a manipulandum physically contacted by the user. A five-bar closed-loop mechanism is coupled to the manipulandum to provide two rotary degrees of freedom to the manipulandum. The mechanism includes members coupled to each other by flexible couplings allowing rotation of the members. In preferred embodiments, four or five of the members are coupled together by flexible couplings that allow bending, thereby forming a unitary piece, where the couplings are oriented along axes of rotation of the mechanism. A senor senses a position of the manipulandum outputs a sensor signal, and in some embodiments actuators are coupled to the mechanism to output a force to the manipulandum in particular degrees of freedom. The manipulandum can be a joystick handle or portion of a sphere, where the device in one embodiment can be a handheld gamepad or similar controller.
摘要:
A reusable closure for placement within the neck of a returnable and reusable container for liquid includes an improved sealing device for preventing contamination of the container. The sealing device achieves a tight seal between a ball and a valve seat within the closure. A cap abutment or spring may optionally be provided to further enhance the tightness of the seal.
摘要:
The apparatus comprises a bifurcated head rotatably mounted upon a spring loaded arm. The head has two edge plates which can be brought into tangential contact with the periphery of a rotating object. When the head is brought into contact with objects of different diameters, the points of contact with the edge plates progress along location locus lines which, when produced, intersect an an apex. A displacement transducer mounted upon the head has a spring loaded plunger with a probe which is contacted to and detects inaccuracies upon the periphery of the object. In order to accommodate test objects of different diameters, the displacement transducer is bodily movable along an axis of adjustment relative to the head. The point of contact between the probe and test object will, between objects of different diameter, progress along a straight measurement locus line parallel to or coincident with the axis of adjustment. This measurement locus line passes through the apex but does not bisect the included angle between the location locus lines. This arrangement is mechanically simple yet gives unequal angular spacings between the points of contact which do not depend on the diameter of the test object. This facilitates the application of accurate harmonic (Fourier) reconstruction of the roundness profile of the test object. No precision turntable or spindle is required and the method is therefore suitable for in situ measurement. The diameter of the test object need not be known.
摘要:
For determining a path of movement of a tool along shoe bottom marginal portions a series of points along such path is selected and information regarding such points stored in the form of digitized co-ordinate axis values by a computer, from which information the path can subsequently be derived. The selected points are spaced by a predetermined distance (which may be the same for each pair of adjacent points) regardless of shoe bottom contour. To this end, when each point is digitized, the tool and shoe bottom are relatively moved apart by the predetermined distance along a first axis, extending heightwise of the shoe bottom. Thereafter in returning the tool and shoe bottom into engagement along said one dimension under operator control, appropriate compensating movement also takes place automatically along a lengthwise axis and/or along widthwise axis. In addition, relative movement may also be effected between the tool and surface under operator control along said widthwise axis, compensating movement then automatically taking place along said lengthwise axis. In either case, the compensating movement serves to maintain the predetermined distance between the tool and the workpiece surface.
摘要:
The invention is related to a manifold comprising at least two valve receptacles, further comprising a fluid groove arrangement comprising at least two fluid grooves, wherein a first fluid groove of the at least two fluid grooves has a starting point near a first valve receptacle of the at least two valve receptacles and an end point near a second valve receptacle of the at least two valve receptacles and wherein a second fluid groove of the at least two fluid grooves has a starting point near a second valve receptacle of the at least two valve receptacles. The invention is further related to an apparatus comprising a manifold of the aforementioned kind and further comprising an inner body of a dispense interface.