The Cal Poly Sustainable Power for Electrical Resources (SuPER) project is developing a low-cost, sustainable source of electrical power for a family unit for the 2 billion people with no electricity. After two years, the initial prototype system uses a solar photovoltaic source with battery storage, provides a standard DC output voltage, is digitally controlled, and is documented as an open source product. A complete Matlab/Simulink simulation model is validated with measurements from the prototype. The SuPER system design goals are for a 20 year life cycle with a mean time between failure (MTBF) of 25 years, a mean time to repair (MTTR) of 1 hour after receiving parts at the site, and a cost to manufacture of $500. All the work is being done at Cal Poly using undergraduate student senior projects and graduate student master theses, and field testing will be done at the Cal Poly Organic Farm.

-The objective of this work is to investigate ripple factor of half-wave rectifier circuits. The ripple factor is one of important characteristic necessary when designing a power electronic converter. The ripple factor measures how much deviation the converter output parameter has, such as the output current, from its nominal designed value. In this paper the ripple factor of the output current of half-wave rectifiers will be investigated. More specifically, the ripple factor of output current from more practical half-wave rectifiers that include inductive load with or without a freewheeling diode will be analyzed and then compared to that of the basic half-wave rectifier consisting only of a resistive load. Derivation of the equations for the ripple factor for the three half-wave rectifier circuits will first be presented. From these results, plots will be generated using Pspice that will allow us to conveniently compare the ripple factor performance of each of the rectifiers.

In fiber optics the Four Wave Mixing (FWM) has the harmful effect of an optical transmission system that can severely limit Wavelength Division Multiplexing (WDM) and reduce the transmission aptness. This work preset the durability of the different modulation format was tested to FWM by using Dispersion Shifted Fiber (DSF). Moreover, the performance of the proposed system is surveyed by changing the fiber length and applying an information rate of 200 Gb/s. The experimental results show that the FWM capacity has decreased significantly by more than 14 dB when applying Return to Zero (RZ) modulation form. In addition, in terms of the propsed system performance in the first channel and with 700 km distance, it was observed that the lower Bit Error Rate (BER) in the normal RZ modulation is equal to 1.3×10 -13 . As well as it is noticeable when applied the Non Return to Zero (NRZ), the Modified Duobinary Return to Zero (MDRZ) and Gaussian modulation, the system performance will be quickly changed and getting worse, where the BERs increased to 1.3×10 -4 , 1.3×10 -6 and 1.3×10 -2 consecutively at same channel and for the same parameters. . His main interest is medical signal processing, Microcontroller systems, Biomedical sensors and control system analysis. Mr. Murad ObaidAbed earned his MSc. in the field of Electrical Engineering from university of technology, Iraq, 2002. He has more than five years of experience in teaching. He completed his BSc in Electrical Engineering, University of Technology, Baghdad, Iraq, 1983. His research interests include communication, wavelet transform, electronic system design and Quantum communication.

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