The development of robust desulfurizers and new reforming catalysts is a critical path for the use of jet fuels in powering the commercial growth of fuel cell systems for air and military applications. The presence of high concentrations of sulfur-containing organic compounds leads to rapid deactivation of traditional reforming catalysts, and removal of the sulfur components from the fuel throu...

A new flip-flop design using a double-pulsed static latch is presented. The flip-flop has only a single stage of logic in the critical path and as a result is up to three times faster than the fastest previously known flip-flops, while consuming approximately the same energy as the lowestpower flip-flops. The flip-flop has asymmetric timing properties which make it a good match to skewed logic ...

High-performance cache architectures always pull up the bitlines in all cache subarrays to hide the bitline charging latency prior to a cache access. Unfortunately, such architectures lead to significant bitline discharge in unaccessed subarrays in nanoscale CMOS caches and waste power. Recent proposals advocate bitline isolation to reduce bitline discharge in unaccessed subarrays by turning of...

Asynchronous transfer mode (ATM) networks can support a wide variety of applications with varying data rates. Fiber Distributed Data Interface (FDDI) networks are targeted to support similar applications, but only in a LAN environment. Both of these networks are characterized by high data rates and low error rates. In addition, they can provide applications with varying degrees of performance g...

The FFT processor is a critical block in all multi-carrier systems used primarily in the mobile environment. The portability requirement of these systems is mainly responsible for the need of low power FFT architectures. In this study, an efficient addressing scheme for radix-4 64 point FFT processor is presented. It avoids the modulo-r addition in the address generation; hence, the critical pa...

In the present paper, Characteristics of fuzzy project network using statistical data are discussed in detail in order to calculate the fuzzy critical path, fuzzy earliest times, fuzzy latest times and fuzzy total float. Fuzzy number as fuzzy activity time is constructed using interval estimate by calculating mean, variance and standard error. A new ranking function is used to discriminate the ...

The notion of the necessary criticality (both with respect to path and to activity) of a network with imprecisely defined (by means of intervals or fuzzy intervals) activity duration times is introduced and analyzed. It is shown, in the interval case, that both the problem of asserting whether a given path is necessarily critical and the problem of determining an arbitrary necessarily critical ...

In this paper, we focus on the problem of secure multicast in dynamic groups. In this problem, a group of users communicate using a shared group key. Due to the dynamic nature of these groups, to preserve secrecy, it is necessary to change the group key whenever the group membership changes. While the group key is being changed, the group communication needs to be interrupted until the rekeying...

This paper addresses the issue of collapsing dependent floatingpoint operations. The presentation focuses on studying the dataflow graph of benchmark involving a large number of floating-point instructions. In particular, it focuses on the relevance of new floating-point operators performing two dependent operations which are similar to “fused multiply and add”. Finally, this paper examines the...

Digital circuits often have a critical path that runs through a small subset of the component subblocks, but where the path changes dynamically during operation. Dynamically resizable static CMOS (DRCMOS) logic is proposed as a fine-grain leakage reduction technique that dynamically downsizes transistors in inactive subblocks while maintaining speed in subblocks along the current critical path....