Abstract:
An improved method for automatically improving the precision of an extrapolation operator used, for example, in software program verification in connection with the static analysis and model checking of the software programs which rely on fix-point computation. In particular, a new extrapolation-with-care-set operator, together with a method for gradually increasing the precision of this operation by tightening the care set.
Abstract:
Methods and systems for concurrent program verification. A concurrent program is summarized into a symbolic interference skeleton (IS) using data flow analysis. Sequential consistency constraints are enforced on read and write events in the IS. Error conditions are checked together with the IS using a processor.
Abstract:
A method for reducing eddy currents caused by the gradient magnetic field in a magnetic resonance system employs an anti-eddy current device formed by a number of laminated metallic plates, and includes the steps of calculating the distribution of the main magnetic field of the magnetic resonance system in the anti-eddy current device, calculating the distribution of the main magnetic field and the gradient magnetic field in the anti-eddy current device, subtracting the calculated distribution of the main magnetic field in the anti-eddy current device from the calculated distribution of the main magnetic field and the gradient magnetic field in the anti-eddy current device, to obtain the distribution of the gradient magnetic field in the anti-eddy current device, and adjusting the setting of the metallic plates of the anti-eddy current device based on the distribution of the gradient magnetic field in the anti-eddy current device, so as to reduce the eddy current. The adjustment in the metallic plates of the anti-eddy current device should be such that the gradient magnetic field is parallel to or substantially parallel to the plane of the metallic plates. The metallic plates can be further divided into a number of areas, or the laminating direction of the metallic plates in different areas can be adjusted according to the specific distribution of the gradient magnetic field to obtain the optimum effect of eddy current reduction.
Abstract:
Techniques for removal of photolithographic films used in the manufacture of semiconductor devices are provided. A substrate support member of a first processing chamber includes at least three retractable pins capable of elevating a wafer from a surface of the substrate support member. In addition, the first processing chamber is configured to automatically maintain the substrate support member at a first temperature. The wafer is elevated from the surface of the substrate support member using the at least three retractable pins. Thermal heating of the substrate from the substrate support member is reduced. A photoresist layer of the substrate is etched away while the substrate is in an elevated position. An anti-reflective layer of the substrate can be etched to remove substantially all of the anti-reflective layer. In a specific embodiment, the anti-reflective layer includes a DUO™ Bottom Anti-Reflective Coating by Honeywell International Inc.
Abstract:
A system and method to perform discretization and cardinality reduction of item attributes using collaborative filtering techniques are described. Data input by a user is received over a network, the input data further including a plurality of items and associated item metadata related to events performed by the user. The input data is further processed to obtain a predetermined number of groupings, each grouping having a calculated value based on a distance parameter between corresponding attributes of each item stored within the item metadata. Finally, a similarity parameter is computed between each pair of items within the plurality of items based on associated groupings and recommendations of the items are presented to the user based on the corresponding calculated similarity parameter.
Abstract:
A system and method to compute attribute-based similarity between items using collaborative filtering techniques are described. Events input by a user over a network are received, the events further including a plurality of items and associated item metadata. A similarity value is further computed between each pair of items within the plurality of stems based on corresponding attributes of each item stored within the item metadata. Finally, recommendations of the items to the user are presented based on the corresponding calculated similarity value.
Abstract:
A reliquifier using a cryocooler in which an insulated sleeve surrounds a portion of the cold head, a first stage cooling station, and a second stage cooling station, including a condenser. Gas is conveyed from a cryostat to the insulated sleeve, where it is liquefied as it passes over the cold head. An end of the insulated sleeve is connected to a liquid transfer tube for conveying condensed fluid back to the cryostat.
Abstract:
The present invention provides a method comprising the following steps: (a) partitioning an intensity modulated beam into a set of sub-IMBs; and (b) partitioning the sub-IMBs into segments, wherein steps (a) and (b) introduce no machine delivery error. The present invention also provides a method comprising the following steps: (a) recursively partitioning an intensity modulated beam into plateaus; and (b) partitioning the plateaus into segments, wherein step (a) comprises determining a tradeoff between machine delivery error and the number of segments into which the plateaus will be partitioned in step (b).
Abstract:
A differential space-time block coder produces successive space-time blocks of symbols from M-PSK symbols to be encoded, in accordance with an orthogonal matrix and a normalization factor. Differentially encoded space-time output blocks, for transmission via a plurality of transmit antennas (16, 18) of a wireless communications system, are produced by multiplying (42) each space-time block from the space-time block coder (40) by the respective previous (44) differentially encoded space-time output block. Decoding is independent of channel estimation, and the arrangement is simple, avoids error propagation, and is applicable to different numbers of transmit antennas.
Abstract:
An additive manufacturing process for forming a metallic layer on the surface of the substrate includes fabricating a substrate from a polymerizable composition by a stereolithographic process, and contacting the reactive surface with an aqueous solution including a metal precursor. The metal precursor includes a metal, and the polymerizable composition includes a multiplicity of multifunctional components. Each multifunctional component includes a reactive moiety extending from a surface of the substrate to form a reactive surface. An interface between the reactive surface and the aqueous solution is selectively irradiated to form nanoparticles including the metal in a desired pattern. The nanoparticles are chemically coupled to the reactive surface by reactive moieties, thereby forming a metallic layer on the surface of the substrate.