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Algorithm-Based Fault Tolerance (ABFT) is a technique developed by J. A. Abraham and K. Huang in 1984 [HA 84]. The technique focuses on matrix computations, and more specifically, on how we can detect and correct the probable faults in a matrix-vector or matrix matrix multiplication. According to the [HA 84] Algorithm Based Fault Tolerance is distinguished… (More)

- Theodoros Typou, Vasilis Stefanidis, Panagiotis Michailidis, Konstantinos Margaritis
- 2004

The matrix multiplication is one of the most important computational kernels in scientific computing. Consider the matrix multiplication product C = A×B where A, B, C are matrices of size n×n. We propose four parallel matrix multiplication implementations on a cluster of workstations. These parallel implementations are based on the master – worker model… (More)

- Panagiotis D. Michailidis, Vasilis Stefanidis, Konstantinos G. Margaritis
- Panhellenic Conference on Informatics
- 2005

This paper presents the basic parallel implementation and a variation for matrix vector multiplication. We evaluated and compared the performance of the two implementations on a cluster of workstations using Message Passing Interface (MPI) library. The experimental results demonstrate that the basic implementation achieves lower performance than the other… (More)

Abstract: In this paper, a microwave chaotic oscillator with symmetric active load is presented. Compared to the classical Differential bipolar Chaotic Colpitts Oscillator (DCCO) produces anti-phase dual output carriers with intense chaotic behaviour, better linearity and very good encryption capabilities. Advanced Design System (ADS) 2008 Update 1… (More)

- Panagiotis D. Michailidis, Theodoros Typou, Vasilis Stefanidis, Konstantinos G. Margaritis
- 2006

Matrix computations is one of the most important computational tasks in scientific computing. This paper discusses parallel implementations of two fundamental matrix computation kernels such as matrix vector multiplication and matrix multiplication on a cluster of heterogeneous workstations. These parallel implementations are based on the master worker… (More)

- Odysseus Tsakirids, Evangelos Zervas, Vasilis Stefanidis
- 2009

This paper outlines the basic theory and the design and implementation of a low voltage Colpitts chaotic oscillator based on an Electrically Programmable Analog Device matched Pair Mosfet Array (EPAD). The Oscillator is capable of producing chaotic carriers in very low supply voltages, which is a feature very useful in mobile and low power consumption… (More)

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