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50results about How to "Improve technique" patented technology

System for incrementally computing the maximum cost extension allowable for subsequent execution of each task using fixed percentage of the associated cost

The present invention provides a method, system, and computer program product for improving scheduling of tasks in systems that accumulate execution time. An upper bound is computed on the amount of additional time each schedulable task in the system may continue to execute after exceeding its predetermined cost, without adversely affecting overall operation of the system (that is, ensuring that the continued execution will not cause invocations of subsequent tasks to fail to meet their execution deadlines). By allowing tasks to run longer, the potential that the task will successfully end is increased, thereby yielding a more efficient overall system. In the preferred embodiment, the extensions are iteratively computed as a fixed percentage of the cost of each task until reaching an amount of time where the system is no longer feasible. The extension values resulting from the iteration before the cost-extended system becomes infeasible are then used at run-time when a particular task encounters an overrun condition. This technique is advantageous in systems where execution of non-schedulable entities (such as occurrence of hardware interrupts) occurs during execution of one or more of the scheduled tasks.
Owner:IBM CORP

Antenna phase estimation algorithm for WCDMA closed loop transmitter antenna diversity system

This invention teaches a method for use in a wideband CDMA telecommunications system wherein the base station (BS) utilizes transmit antenna diversity. The method enables the user equipment (UE) to perform a channel estimate for channels received from two antennas of the base station (BS), and includes steps of: (a) computing an estimated phase difference between a common pilot channel and a dedicated pilot channel received from one antenna of the two antennas; and (b) determining the channel estimate by rotating a common pilot channel estimate according to the estimated phase difference, where the phase difference is computed as a complex coefficient between the common pilot channel and the dedicated pilot channel. In a second aspect this invention teaches a method for use in a transmit antenna diversity system for enabling the UE to verify an antenna phase shift previously signaled by the UE to the BS. This method includes a first step of: (a) exploiting prior knowledge of BS rotation angle by considering a vector x that includes all hypotheses for complex rotation coefficients of the BS with respect to all possible rotation angles, in accordance with a decision rule for an estimation of a complex rotation coefficient. A second step of the method evaluates a cost function of a hypothesis m by considering the prior knowledge.
Owner:NOKIA MOBILE PHONES LTD

Network address translation in session initiation protocol based application

Improved techniques are disclosed for providing network address translation (NAT) in a session initiation protocol (SIP) based application. For example, a method for use in a router for performing NAT on a SIP message associated with a session being initiated between a first device and at least a second device, wherein the first device is part of a first network and the second device is part of a second network, includes the following steps. A SIP message is obtained from the first device, wherein a header field of the SIP message includes a local address and local port number usable by the first device on the first network. A port number to be associated with the session being initiated is randomly selected. The randomly selected port number is usable on the second network. An association (e.g., a binding) is generated between the randomly selected port number and a global address usable on the second network, the local address and the local port number. The local address and the local port number are substituted in the header field of the SIP message with the global address and the randomly selected port number thereby generating an address-translated SIP message. The address-translated SIP message is sent to the second device on the second network. The randomly selected port number may serve as a unique identifier for the session being initiated.
Owner:AVAYA ECS

Method and apparatus for diagnostic analyses

A method for diagnostic analyses, in particular to identify pathogens, such as viruses, bacteria or other micro-organisms present in a biological sample, comprises a first step of measuring and continuously monitoring the turbidity and/or the concentration of the pathogens, by means of an instrumental reading technique, of a liquid culture medium into which the sample to be analyzed has been inoculated and in which the replication of the pathogens possibly present occurs, said measuring and monitoring being carried out dynamically during the replication of the pathogens growing in the culture medium; and a second step of identifying the pathogens, carried out by taking at least an aliquot of the liquid culture medium containing the biological sample directly obtained from the first step, which has reached a desired value of turbidity according to a standardized value scale, such as the McFarland turbidity scale, and/or of concentration of the pathogens, and using said aliquot directly in mass spectrophotometric identification means (15) in order to identify the pathogens, which means are calibrated in their functioning depending on the measurement results of the first step. The desired values of turbidity and/or of concentration of the pathogens are preliminarily selected, during the first step, on the basis of the specific needs which, on each occasion, are identified in order to carry out the second identification step
Owner:ALIFAX

MRI with dixon-type water/fat separation with estimation of the main magnetic field variations

The invention relates to a method of MR imaging of at least two chemical species having different MR spectra. It is an object of the invention to provide a Dixon water/fat separation technique that avoids swaps of water and fat signals in the reconstructed MR images due to large gradients of the main magnetic field B0. The method of the invention comprises the steps of: a) generating echo signals at different echo times by subjecting an object (10) positioned in a main magnetic field to a multi-echo imaging sequence of RF pulses and switched magnetic field gradients; b) acquiring the echo signals; c) correcting the acquired echo signals by virtual shimming, which comprises:—reconstructing single echo images from the echo signals;—selecting a number of voxel positions;—fitting a given mathematical function, which reproduces the spatial variation of the main magnetic field, to the echo time-dependent phase evolution of the single echo image values at the selected voxel positions; demodulating the single echo images according to the spatial variation of the main magnetic field as reproduced by the mathematical function; and d) reconstructing a MR image, wherein signal contributions of the at least two chemical species are separated on the basis of the demodulated single echo images. Moreover, the invention relates to a MR device and to a computer program to be nm on a MR device.
Owner:KONINKLJIJKE PHILIPS NV
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