The World of Computer Science and Information Technology Journal

4

Authors: Ruzayn Quaddoura

A matching in a graph is a set of edges no two of which share a common vertex. A matching M is an induced matching if no edge connects two edges of M. The problem of finding a maximum induced matching is known to be NP-hard in general and specifically for bipartite graphs. Lozin has been proposed an O(n^3) time algorithm for this problem on the class of bipartite 〖Star〗_123,〖Sun〗_4-free graphs. In this paper we improve and generalize this result in presenting a simple O(n) time algorithm for maximum induced matching problem in bipartite 〖Star〗_123-free graphs.

5

Authors: Mohammed J. Alhaddad, Mahmoud Kamel, Noura Al-Otaibi,

BCI represents a new communication way for people who suffering from neuromuscular impairment. In other words, BCI allow them to communicate with outside an environment, control prosthetic or other external devices by using only their brain activity. BCI system based on change of brain activity such that p300 potential. In BCI based on P300, the paradigm with some possible choices – such that letters or image – are present to users. One of the major problems in P300 application is the difficult to find a P300 response from a single trial. Hence several trials are performed for each element in order to decrease the error in prediction. This led to spend long time for predicted the user intent. For this purpose, this study concerns on Bayesian method that can take adaptive decision about stopping a data acquisition modules as soon as reach to reliable decision. The main advantage of using adaptive number of trials is increased a communication speed with keeping a good classification accuracy.

5

Authors: Samah A. Massadeh

Jordan is one of the most water‐scarce countries in the world. The Jordan valley area produces more than 60% of the Kingdom’s fruits and vegetables. The Jordan valley area has dry and warm weather almost all around the year. These climatic conditions, coupled with low water holding capacity of the predominately-sandy soils in the Jordan valley area, make irrigation indispensable for the high quality landscapes desired by Farmers since it is the main agricultural area in Jordan. The idea of this paper is to design an intelligent automated irrigation system for the Jordan valley area; which will ensure efficient water allocation and higher performance. The automated irrigation system suggested is a PIC microcontroller based system that monitors air humidity, soil humidity, temperature, sun light, levels of water storage tank, and drip irrigation pipes for any cut or damage all the time, and display these parameters on an LCD screen as human interface, the user will be able to view the system status and to will be alerted for any damage, low water level or any water leakage at the drip irrigation pipes. The suggested system is applicable and can be implemented to work for large areas like the Jordan valley area with a very low cost design and saves a lot in the terms of the water used for irrigation.

6

Authors: Tarik ANOUARI, Abdelkrim HAQIQ

WiMAX (acronym for Worldwide Interoperability for Microwave Access) is a family of technical standards based on IEEE 802.16 standard that defines the high speed connection through radio waves unlike DSL (Digital Subscriber Line) or other wired technology. It can provide coverage to remote rural areas of several kilometers in radius, it’s an adequate response to some rural or inaccessible areas. WiMAX can provide point-to-point (P2P) and point-to-multipoint (PMP) modes. In parallel, it was observed that, unlike the traditional assessment methods for quality, nowadays, current research focuses on the user perceived quality, the existing scheduling approaches take into account the quality of service (QoS) and many technical parameters, but does not take into account the quality of experience (QoE). In this paper, we present a scheduling algorithm to provide QoE in WiMAX network under Manhattan Mobility. A new approach is proposed, particularly for the Best Effort (BE) service class WiMAX, in this approach, if a packet loss occurs on a link connection, the system then reduces the transmission rate of this connection to obtain its minimum allowable transmission rate. The NS-2 simulation results show that the QoE provided to users is enhanced in terms of throughput, jitter, packet loss rate and delay.