Development of Substrate Type Planar 10-Cell Stack SOFC: Stack Performance and Lifetime Characteristics

Effect of Sealing Gas Washer Design on a PEM Stack Fuel Cell Performance

In this paper we study the performance of a PEM stack fuel cell after 900 hours of operation. We tried to identify any voltage degradation and its causes. Microscopic cracks on some parts of MEA mainly due to uniformity of pressure, stress concentration and elongation of membrane in the edge of GDL has been identified as the most important cause of this gradual degradation. High contact resista...

3.2 A Web Services Protocol Stack........................... 10

A stack and pop stack in series

We study sorting machines consisting of a stack and a pop stack in series, with or without a queue between them. While there are, a priori, four such machines, only two are essentially different: a pop stack followed directly by a stack, and a pop stack followed by a queue and then by a stack. In the former case, we obtain complete answers for the basis and enumeration of the sortable permutati...

class STACK ( T ) is { { Implementation of STACK

Embedded speciications in object-oriented (OO) languages such as Eiiel and Sather are based on a rigorous approach towards validation, compatibility and reusability of sequential programs. The underlying method of \design-by-contract" is based on Hoare logic for which concurrency extensions exist. However concurrent OO languages are still in their infancy. They have inherently imperative facets...

Performance Characterization of the FreeBSD Network Stack

This paper analyzes the behavior of high-performance web servers along three axes: packet rate, number of connections, and communication latency. Modern, high-performance servers spend a significant fraction of time executing the network stack of the operating system—over 80% of the time for a web server. These servers must handle increasing packet rates, increasing numbers of connections, and ...