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This paper examines the emerging concept of Service Delivery Platforms (SDP’s), which promise to provide a much-needed, focused abstraction and architecture for a variety of tasks related to the delivery of advanced and value-added mobile and converging communication services. We propose that, given the ever-growing complexity of those tasks and heterogeneity of the communication facilities a SDP is required to incorporate and abstract, autonomic capabilities should become a native part of the functionality of SDP’s, so that the management and mediation of services and other facets of the delivery architecture are managed in a self-adaptive fashion. We identify some major elements in a SDP that are appropriate targets for the injection of autonomic capabilities, and we outline how they could benefit service execution, network abstraction, and service exposure.
A picture transmission system of the present invention is adapted to code picture data by a variable sampling rate coding system to transmit the same. Picture data are stored in a frame memory (16) of a transmission area so that differential values between the same and predictors from a predictive circuit (43) are obtained by a subtracter (41) and compression-coded by a variable sampling rate compression circuit (42) to be transmitted. The compression-coded differential values are expansion-decoded by a variable sampling rate expansion circuit (40) so that original differential values are supplied to an adder (45). The adder (45) adds up the differential values with predictors, to produce predictors for subsequent sampling points. In a receiving area, transmitted codes are expansion-decoded by a variable sampling rate expansion circuit (51), so that the decoded values are added up with predictors from a predictive circuit (53) by an adder (52) to output the original picture data. Preposition prediction and variable sampling rate decoding are thus combined to enable, in the receiving area, automatic correction of compression/expansion errors caused in the transmission area.
Communication performance analysis of message passing parallel programs relies on accurate modeling of cluster network traffic patterns. To this end we have developed a tool for collecting traffic samples by simulating parallel processing environment with statistically tractable network traffic. Our results from experiments show network packet traffic generated by messagepassing parallel programs in a Beowulf cluster setting exhibits strong self-similarity, which was tested using Hurst parameters. As most known Hurst parameter estimators are heuristics, we propose a novel approach for statistical inference via parametric bootstrapping, and show confidence intervals of the estimated parameters. The empirical results demonstrate the usefulness of the traffic generation tool as well as the Hurst parameter interval estimation method in the investigation of parallel processing communication performance.
A luminance/chrominance separating apparatus for a composite video signal comprises a vertical direction filter section for extracting a delayed chrominance signal and a delayed luminance signal from the composite video signal; a horizontal direction filter section for extracting a non-delayed chrominance signal and a non-delayed luminance signal from the composite video signal; a correlation detector section for detecting a correlation of the composite video signal and producing a gain control signal in response to such detected correlation; and respective gain control circuits for receiving and processing the delayed and non-delayed chrominance and luminance signals in accordance with the gain control signal. In accordance with the gain control signal, complementary gain factors are determined, and applied to the delayed chrominance signal and non-delayed chrominance signal by the respective gain control circuits. The outputs of the gain control circuits are then added to produce chrominance and luminance output signals. The gain factors are selected such that when a correlation of the composite video signal is detected, the output chrominance signal is the delayed chrominance signal; but when no correlation is detected, the output chrominance signal is the non-delayed chrominance signal. The delayed and non-delayed luminance signals are processed in the same way.
The print head includes a stationary block of non-conductive material having a plurality of openings into which spark jet capsules are received and a plurality of openings into which electrodes with off-set parts are received. Each electrode is located proximate the end of a different one of the capsules with the off-set part thereof situated in a channel on the block surface extending therebetween. The capsules are arranged in rows transverse to the direction of paper movement. The capsules in each of the rows are slightly off-set with respect to the corresponding capsules in the preceding row. The paper is moved continuously past the block. Actuation of the individual capsules is synchronized with the movement of the paper.
A Loadable Character Generator whose operation can be changed to suit various needs, such as foreign language requirements, without hardware change and with minimum hardware. The character generator translates the character code of a character to be displayed to the dot pattern for that particular character, utilizing a minimum of hardware. The loadable character generator of the invention replaces the ROM/PROM by a RAM utilizing 2K and 8 RAM memories, a 4K by 8 memory, 4 MUX chips, and a Motorola 6845 CRT Controller with various registers and is loaded through the attribute buffer.
A method for editing graphic objects in an interactive draw graphic system, in which the operator is allowed to select one of two editing modes which results in a graphic object being either redefined or remaining as is when a graphical editing action is applied only to a portion (sub-object) of the object. In the REDEFINE mode, the graphic editing action e.g., stretch, shrink, scale down, rotate, etc., applied to a sub-object results in the line segments of the object that are attched to the ends of the sub-object to be redrawn or "rubber-banded" as the sub-object is edited (moved). In the AS-IS mode only the sub-object is affected by the graphic editing action and the rest of the object is not altered.
Orthogonal Variable Spreading Factor codes are used as channelization codes in WCDMA. In this particular paper, we present a new OVSF codes which is generated from the Jacket Matrices for DS-CDMA systems. The simulations result shows that the purposed OVSF can efficiently reduce the peak values of the correlations than the conventional HOVSF without orthogonality loss. It will be useful to detect the multi-user system under the asynchronous system and save the power of transmission.
Path management in next generation networks will be computationally excessive if guarantied quality of service is to be offered. Route computations subject to many and changing requirements set forth by a range of applications is far from straight forward when applying state-of-the-art routing systems. Robust and adaptive swarm based systems are candidates to handle future path management challenges. One such system, the Cross Entropy Ants System (CEAS), provides stochastic, asynchronous and truly distributed path management. In most management systems there is a trade-off between performance and management overhead. This paper presents an improved version of CEAS, denoted Subpath CEAS. Significant savings are observed in memory usage, and in the number of control packets generated, without loss of performance or added processing. To achieve this, end-toend paths with the same destination and QoS requirements are made to share and exploit information about their common sub-paths.
A color printer for printing a color image of sequential lines of three different base colors, with a drum having a length of sheet-like information carrier wrapped around it and secured thereto. A transmission means having a gear ratio is connected between a motor shaft and the drum for rotating the drum. The gear ratio of the transmission means, the drum radius and the thickness of the information carrier are so selected that for a whole number of revolutions of the motor shaft the drum moves a location on the information carrier a distance equal to 2( pi R)+x from the position at which the location was when the motor started revolving wherein R is equal to the sum of the radius of the drum and the thickness of the information carrier and x is equal to the distance between two successive lines of different base colors in the printed color image.
A character pattern storage and display device stores information descriptive of a character, information representative of the amount of downward shift to be effected to a character pattern of the character, information representative of the width of the character to be displayed, and, where the character is to be displayed with its width changed, information representative of the start position of an actual character in the information stored. A control circuit is provided for moving the position at which the character is displayed on the basis of such information.
An ink jet printer having an imaging drum with a supply of paper within the drum. The paper is transported by rollers mounted on the imaging drum that are controlled by the transverse position of a cutter mechanism that cuts off the imaged paper. The paper passes from the supply spool in the imaging drum through a longitudinal slot in the drum to the outside, around the exterior of the drum, where it is held in place during the imaging process, and then ejected from the drum to the desired length and cut off. While the imaged sheet is being ejected from the drum, the next length of paper is drawn from the drum and around the outside of the drum in position for the next imaging operation. The length of paper that remains projecting from the drum after the imaged paper has been cut off is then withdrawn into the interior of the drum through the longitudinal opening in the drum surface until only a short stub, which will not interfere with the subsequent imaging operation, remains protruding from the drum. After each imaging operation, the cutter mechanism provides mechanical control of the paper handling drive assembly for the ejection, withdrawal and tensioning of the paper.
