King Fahd University of Petroleum and Minerals

Ahmed A Masoud

Ali Al-Shaikhi

Ramadan Abdul-Rashid

Mohanad Ahmed Mohamed Elhassan

A system and method for monitoring a predetermined condition in a harsh environment, includes wireless sensor nodes each having a physical clock and a soft clock. The sensor configured to detect the predetermined condition. Each wireless sensor node remains in a sleep mode, then independently, when a triggering event is true, the soft clock evolves a value of a dynamical local time variable using time variable values communicated by random other of the wireless sensor nodes that are within a single hop based on the harsh environment, infers from its dynamical local time variable the communication instant at which the dynamical local time variable is closest to the time value of the gateway node, and initializes the physical clock using the value of the dynamical local time variable at that instant to generate and communicate the local node time through the gateway node to the end-user device.

Asynchronous realizations based on accurate, energy-efficient, decentralized, single-hop time synchronization protocol for WSNs

The target-seeking control method and system for mobile robots uses a raw, ultrasonic sensory signal. The present method carries-out reasoning and decision-making in a subjective environment (SE) on-board the robot. This environment has only two links to the objective environment (OE) in which the robot is operating. If the robot is at a safe place in a SE, then it is at a safe place in the corresponding OE. If the robot reaches the target in a SE, then it reaches the target in the corresponding OE, The present method uses relaxed potential fields to base enroute mobility on safety, only without having to accurately estimate the geometry of the surrounding environment, thereby significantly reducing structure complexity and increasing its reliability.

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Dhahrad, Saudi Arabia

Ahmed A Masoud