About 1.6 billion tons of food are wasted worldwide annually, calling for advanced methods to recycle waste into energy and materials. Anaerobic digestion kitchen allows the efficient recovery energy, induces low-carbon emissions. Nonetheless, stability biogas production variables, due dietary habits seasonal diet variations that modify components waste. Another challenge is recycling digestate...

A hybrid wind/ fuel cell generation system is designed to supply power demand. The aim of this design is to minimize the total cost of the hybrid system over an expected 20 years of operation. The optimization problem is solved aimed at providing a reliable supply for the consumer’s demand. The system consists of fuel cells, some wind units, some electrolyzers, a reformer, an anaerobic reactor ...

The H2CO3-HCO3system in vertebrates did not evolve directly from the original forms of life. Organic evolution probably dates back some 109 years.1 Although there may have been small amounts of CO2 present in the atmosphere and CO2 was definitely present in the earth mantle, it is generally accepted that metabolic pathways were anaerobic in nature. This conclusion is based on several lines of e...

FOSS (Free and Open Source Software) systems present interesting challenges in system evolution. On one hand, most FOSS systems are based on very fine-grained units of software deployment—called packages—which promote system evolution; on the other hand, FOSS systems are among the largest software systems known and require sophisticated static and dynamic conditions to be verified, in order to ...

The Stanford Synchrotron Radiation Laboratory started its operation as a parasitic light source in 1973, becoming a fully dedicated user facility in 1992. A project was approved in 1998 to upgrade the storage ring to a third generation source. In order to sustain higher current in a tightly reconfigured magnetic lattice, it became necessary to upgrade the RF system from the present 5-cell cavit...

A selection combining scheme is considered as an upgrade solution to existing wireless networks. The upgrade requires the use of a new radio frequency front end at the receiver with three antennas instead of one. An approach to guarding the system from diversity loss caused by antennas proximity is proposed. As an example, the upgrade of mobile units in an IS-136 network is analyzed. Performanc...

Three electrolysis cells with built-in ultrasonic transmitters were developed by Energetics Technologies. The ultrasonic transmitters induce cavitation in the electrolyte in the vicinity of the palladium cathode for in-situ cleaning and activation of the cathode surface, generation of dislocations, assistance in loading and excitation of the Pd-D system. The ultrasonically assisted electrolysis...

We studied the effects of aeration of Shewanella oneidensis on potentiostatic current production, hydrogen production in a microbial electrolysis cell, and electric power generation in a microbial fuel cell (MFC). The potentiostatic performance of aerated S. oneidensis was considerably enhanced to a maximum current density of 0.45 A/m(2) or 80.3 A/m(3) (mean: 0.34 A/m(2), 57.2 A/m(3)) compared ...