A bstra ct Y In this paper, we present an efficient parallel algorithm for finding a set of maximal elements on the xy-plane, which is based fin a linear array processors with optical pipelined bus system(LAPd°BS). Our parallel algorithm for solving the two dimensional maximal elements problem on the LARPBS model runs in O(?og n) time using O(n) number of processors, where n is the number of elements on the x-yplane.

During the last several years, dynamic voltage scaling (DVS) algorithms are being used for energy consumption on real, fully functional battery supplied devices, adjusting the clock speed and supply voltage dynamically. Most DVS algorithms are investigated in interval-based and task-based strategies. Taskbased algorithms consider task information, especially task deadline, on deciding what speed to choose at any given time.Interval-based algorithms predict the CPU speed of the upcoming interval based on observations of the CPU utilization of previous intervals, and then set the speed for that interval based on this prediction. Most DVS algorithms have only been tested in simulation environments. In this paper, those interval-based DVS algorithms are modified with different parameters on different workloads, and evaluated to know which one saves the most energy while not degrading computer performance.

The Controller Area Network (CAN) is a message based event triggered communication bus mostly used in the automotive industry. In this paper, however, the CAN bus is tested for being applicable to small satellite systems in order to provide better fault-tolerance. The CAN bus connects several independent CAN modules and allows them to communicate and work together asynchronously and/or synchronously. The CAN modules were designed to decrease weight and cost while improving stability and power consumption compared to current small satellite systems. We present advantages to using the CAN bus over existing satellite bus systems, design and propose a CAN protocol for CubeSats.

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