7674451
A Reconfigurable Self-Healing Embryonic Cell Architecture
The long-term goal of our work described in this paper is the development of a biologically-inspired cellular fault-tolerant hardware system. The basic structure of the system is a multi-cellular embryonic array that is capable of achieving self-diagnostics, self-repair and fault recovery. The ‘nucleolus’ of the cell is a general purpose function unit comprised of a 2-to-1 multiplexer and a Dtype flip-flop. Input and configuration data to the function unit are provided by the DNA segment memory and I/O router. A diagnostic logic monitors the error free operation of the cell. When an error is detected the diagnostic logic requests the reconfiguration unit to kill the cell, transferring its function to a fault-free neighbouring cell. Once permission is granted, the faulty cell is eliminated and becomes transparent. The functionality of each cell will shift in the array until a spare cell is found. Finally the whole embryonic array recovers. Fault-free operation is then continued.
2824619
Partial-DNA Supported Artificial-Life in an Embryonic Array
39634221
Repair of the Genetic Material in Biologically Inspired Embryonic-Cell-Based Systems
59116191
A High Accuracy Printed Traditional and Simplified Chinese Character Document Recognition System
43537984
A performance analysis of a discrete-time queueing system with server interruption for modeling wireless ATM multiplexer
In this paper, we study the effect of channel errors on wireless ATM. The salient characteristic of the wireless channel is that it is time varying. This variability is modeled by a Markov chain with two states corresponding to high and low error states, respectively. The channel is modeled as being synchronous with the basic time unit being the slot. The transitions from high to low error states, and vice versa occur at the slot boundaries. It is assumed that no transmission over the channel is possible during the high-error state.The information source feeding into the channel is modeled as the superposition of independent sources. Each source is controlled by a two-state Markov chain which operates in synchronism with, but statistically independent of the channel. In the source Off state, no data is emitted while, in the On state, the source generates a random number of packets in a slot each of which fits into a channel slot.It is assumed that the traffic generated by all the sources will form a single global queue which will be served by the two-state Markov channel. A discrete-time queuing analysis derives the probability generating function (PGF) of the queue length under the assumption of an infinite buffer. From the PGF, we determine mean queue length and mean delay. Finally, numerical results are presented to demonstrate the effect of wireless channel error characteristics on performance.
16687476
PULMONARY CT IMAGE ANALYSIS AND COMPUTER AIDED DETECTION
This short article summarizes the use of current CT image data for a comprehensive assessment of pulmonary structure and function. It identifies the need for the development of highly automated methods and techniques allowing quantitative analysis of lungs, lung lobes, airway trees, and pulmonary parenchyma. Such analyses serve as the stepping stones for more sophisticated computer-aided detection approaches capable of parenchymal tissue characterization and identification of pulmonary nodules, some of which are discussed
15202321
FREEDOM-7: A High Fidelity Seven Axis Haptic Device with Application to Surgical Training
A seven axis haptic device, called the Freedom-7, is described in relation to its application to surgical training. The generality of its concept makes it also relevant to most other haptic applications. The design ratio- nale is driven by a long list of requirements since such a device is meant to interact with the human hand: uniform response, balanced inertial proper- ties, static balancing, low inertia, high frequency response, high resolution, low friction, arbitrary reorientation, and low visual intrusion. Some basic performance gures are also reported.
6444920
Successive packing based interleaver design for turbo codes
The interleaver is the key component in both turbo encoder and decoder. It has been shown that good turbo code performance can be obtained by using a pseudo-random interleaver. However, it is difficult to analyze the corresponding pseudo-random algorithms such that the performance can be guaranteed, and furthermore they are computationally expensive. We focus on a deterministic turbo code interleaver design. A novel successive packing (SP) based turbo code interleaver design method is proposed. In this method, the interleaver is generated based on iterative packing of the basis interleaver. We have shown that SP based interleavers possess the following desirable features: prunability; adaptability to various criteria; pseudo-random distribution. Simulation results demonstrate the superior performance of SP over other deterministic interleaver design techniques.