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All Journal Statistika Indonesian Journal of Electrical Engineering and Computer Science
Suhaidi Hassan
Unknown Affiliation
Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Industrial & Manufacturing Engineering Mathematics

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PARALLEL MATRIX-MULTIPLICATION ALGORITHM ON NETWORK OF WORKSTATIONS Rusdi Md. Aminuddin; Rosni Abdullah; Suhaidi Hassan
STATISTIKA: Forum Teori dan Aplikasi Statistika Vol 4, No 2 (2004)
Publisher : Program Studi Statistika Unisba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jstat.v4i2.897

Abstract

Matrix multiplication is one of the important operations in scientific and engineering application. However, it is also one ofthe operations that are time consuming. Continuous researches have been conducted to improve this operation. One of thealternatives is to have the operation performed in parallel. However, these types of algorithms often carried out onexpensive supercomputers or multiprocessing systems. With the advancement of personal computers and networking, theuse of network of computers has become an advantage to the computing community. Although programming in suchenvironment is relatively harder compared to that of in shared memory multiprocessing environment, its advantagesoutweigh its complexity. In this paper, we introduce the concept of Network of Computers (NOW) or Cluster computingand present its advantages. We discuss matrix-multiplication algorithm and highlight one of the parallel matrixmultiplicationalgorithms. We present the comparison in terms of speed between serial algorithm and the parallel algorithmwhen we run them on our cluster. We end our discussion by outlining our future works.
Performance evaluation of rank attack impact on routing protocol in low-power and lossy networks Al-Qaisi, Laila; Hassan, Suhaidi; Zakaria, Nur Haryani
Indonesian Journal of Electrical Engineering and Computer Science Vol 36, No 1: October 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v36.i1.pp242-251

Abstract

The internet of things (IoT) is a network of connected devices, enabling the exchange and collection of data from various environments. The routing protocol for low power and lossy networks (RPL) is a protocol for routing IPv6 over low-power wireless personal area networks, commonly used in IoT applications. However, RPL has several security and privacy issues that make it vulnerable to various attacks, including rank attacks (RA), which can lead to denial-of-service (DoS) scenarios. This research aims to address the impact of RA on RPL networks by conducting simulations using the Contiki/Cooja simulator with two topology types, random and grid, along with three RA scenarios and a normal network scenario. The study compares the performance of RPL network OF0 and MRHOF in terms of throughput, packet delivery ratio (PDR), hop count (HC) and delay. The results demonstrate that RA significantly degrades network performance and reduces network lifetime, thus draining its limited resources. Some possible solutions are also suggested to mitigate these attacks by focusing on core components of the network like objective function (OF) and node behavior. Future work will focus on studying security mechanisms for RPL against RA.
Co-Authors Al-Qaisi, Laila Rosni Abdullah Rusdi Md. Aminuddin Zakaria, Nur Haryani