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Articles by K.H. Chong
Total Records ( 2 ) for K.H. Chong
  K.H. Chong , I.B. Aris , M.A. Sinan and B.M. Hamiruce
  In this study, a new method for automatic optimization of digital circuit design method has been introduced. This method is base on randomized search techniques mimicking natural genetic evolution. The proposed method is an iterative procedure that consists of a constant-size population of individuals, each one encoding a possible solution in a given problem space. The structure of the circuit is encoded into one-dimensional genotype as represented by a finite string of bits. A number of bit string used to represent 8 types of possible logic gates, Wire 1, Wire 2, NOT 1, NOT 2, XOR, XNOR, NAND, NOR, AND and OR. The structure of gates are arranged in a m * n matrix form which m is the number of input variables. The experimental results have shown that this method can produce the circuit design base on user specified performance requirement. The representation approach also has been implemented with a computer program which can give better achievement in terms of quality solution and speed of convergence.
  H. Sh. Jassim , S. Yussof , S.K. Tiong , K.H. Chong and S.P. Koh
  Mobile ad-hoc network (MANET) is collection of wireless nodes that operates without using a centralized network infrastructure such as a base station. Since the wireless range is limited, the nodes mutually cooperate with their neighbors in order to extend the overall communication range of the network for forwarding packets. Ad-hoc On-demand Distance Vector (AODV) is one of the commonly used protocols in ad-hoc networks. AODV is a dynamic routing protocol that is able to find the shortest path from a source node to a destination node in MANET based on hop count. However, due to the nature of MANET, it is very easy to introduce malicious nodes in MANET. These malicious nodes may try to compromise the routing protocol functionality and make MANET vulnerable to security attacks which lead to unreliable routing. Therefore, security has become a primary concern in providing protected communication among nodes in MANET. In this study, we propose a Reliable Dynamic Trust-based Routing (RDTR) protocol by integrating a trust mechanism with a shortest path routing algorithm for establishing and maintaining trustworthy routes in MANET.
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