In this paper we describe methods for mitigating the degradation in performance caused by high latencies in parallel and distributed networks. For example, given any “dataflow” type of algorithm that runs in T steps on an n-node ring with unit link delays, we show how to run the algorithm in O(T ) steps on any n-node bounded-degree connected network with average link delay O(1). This is a signi...

In this paper, we study the problem of determining the capacity requirements for applications that require QoS guarantees. We consider three kinds of source models, Poisson based, On-Off based and leaky bucket filter based, and present explicit expressions capturing the required capacity. We compare the required capacity for average delay for these models with the required capacity for absolute...

This paper demonstrates the design of an Arrayed Waveguide Gratings (AWG) based optical switch. In the design both physical and network layer analysis is performed. The physical layer power and noise analysis is done to obtain Bit Error Rate (BER). This has been found that at the higher bit rates, BER is not affected with number of buffer modules. Network layer analysis is done to obtain perfor...

This paper introduces an analytical framework for two small-world network models, and studies the delay of targeted social search by considering messages traveling between source and target individuals in these networks. In particular, by considering graphs constructed on different network domains, such as rectangular, circular and spherical network domains, analytical solutions for the average...

In this work we present a gate sizing tool based on Geometric Programming. The optimization can be done targeting both, delay and power/area minimization. In order to qualify our approach, the ISCAS’85 benchmark circuits are mapped for 350nm and 45nm technologies using typical standard cell libraries. Next, the mapped circuit is sized using our tool and the result is comparated to the original ...

Fractional sample delay (FD) filters are useful and necessary in many applications, such as the accurate steering of acoustic arrays [1], [2], delay lines for physical models of musical instruments [3] [4], and time delay estimation[5]. This paper addresses the design of finite impulse response (FIR) FD filters. The problem will be posed as a convex optimization problem in which the maximum mod...

introduction: over the past two decades, the incidence of cesarean section in most countries has increased.developmental delay occurs when children do not reach their developmental milestones at the expected time. the main causes of developmental delay are often unknown. investigation of the prevalence of developmental delay and its effective factors in children from 4 to 12 months old in pakda...

The potential benefit from introducing trajectory based operations into the NAS is estimated in this paper. Delay predictions of a stochastic and a deterministic queuing model, which represent high and low levels of trajectory uncertainty, are compared. It is found that delay savings are on the order of 35% in the average case, Delay predictions from the various models are found to be strongly ...

Due to their high stiffness, small dimensions and low mass, piezoelectric stack actuators are capable of developing large displacements with bandwidths of greater than 100 kHz. However, due to their large electrical capacitance, the associated driving amplifier is usually limited in bandwidth to a few kHz. In this paper the limiting characteristics of piezoelectric drives are identified as the ...

Portable digital systems tend to be not just low power but power efficient as they are powered by low batteries or energy harvesters. Energy harvesting systems tend to provide nondeterministic, rather than stable, power over time. Existing memory systems use delay elements to cope with the problems under different Vdds. However, this introduces huge penalties on performance, as the delay elemen...