Impedance changes of the anode, cathode and solution were examined for an air-cathode microbial fuel cell (MFC) under varying conditions. An MFC inoculated with a pre-enriched microbial culture resulted in a startup time of less than ten days. Over this period, the anode impedance decreased below the cathode impedance, suggesting a cathode-limited power output. Increasing the anode flow rate di...

This paper presents an energy management strategy to supply residential load by hybrid fuel cell power plant (FCPP). Economical fuel cell (FC) model includes thermal load, local electrical load, operational cost, startup cost and different tariffs on electricity during the day hour is discussed.  Several Strategies have been presented for supplying residential load (electrical and thermal loads...

This paper presents an evaluation of the BBCS scheme meant to alleviate the performance degradation experienced by Vector Processors (VPs) when manipulating sparse matrices. In particular we address the execution of Sparse Matrix Vector Multiplication (SMVM) algorithms on VPs. First we introduce a Block Based Compressed Storage (BBCS) sparse matrix representation format variants, and a BBCS bas...

Dynamic load balancing is crucial for the performance of many parallel algorithms. Random Polling, a simple randomized algorithm, has proved to be very eecient in practice for applications like parallel depth rst search. This paper derives tight bounds for the scalability of Random Polling which are for the rst time able to explain its superior performance analytically. In some cases, Random Po...

This paper analyzes the performance of three systems for in-memory data management: Memcached, Redis and the Resilient Distributed Datasets (RDD) implemented by Spark. By performing a thorough performance analysis of both analytics operations and fine-grained object operations such as set/get, we show that neither system handles efficiently both types of workloads. For Memcached and Redis the C...

An analytical model is developed for the startup transient of asymmetrical flat-plate and diskshaped heat pipes. The model solves the proper transient heat conduction equations for the heat pipe wall and liquid-wick regions. A quasi-steady state, pseudo three-dimensional approximation is used for the vapor transi’ent behavior. The heat transfer within the wall and liquid-wick regions is coupled...