In 1995 Penna introduced a simple model of biological aging. A modified Penna model has been demonstrated to exhibit behavior of real-life systems including catastrophic senescence in salmon and a mortality plateau at advanced ages. We present a general steady-state, analytic solution to the Penna model which is able to deal with arbitrary birth and survivability functions. This solution is emp...

Energy has emerged as a critical constraint in mobile computing because of the involving devices that are battery-operated with a limited amount of energy. We focus on the memory energy dissipa-tion. This is motivated by the fact that, for data intensive applications, a signiicant amount of energy is dissipated in the memory. Advanced memory architectures like the Mobile SDRAM and the RDRAM sup...

Elmore delay has been widely used to estimate the interconnect delays in the performance-driven synthesis and layout of VLSI routing topologies. For typical RLC interconnections, Elmore delay can deviate signiicantly (by up to 33% or more) from SPICE-computed delay, since it is independent of inductance. Here, we develop an analytical delay model based on rst and second moments to incorporate i...

As the number of transistors that can be integrated onto a single chip continues to increase exponentially, a growing challenge is modeling performance with reasonable accuracy in the early stages of processor design. While methodologies for execution driven simulations are well understood, comparatively little is known about how to develop accurate analytical models. Processor architects in in...

BACKGROUND Understanding of viscoelastic behaviour of a periodontal membrane under physiological conditions is important for many orthodontic problems. A new analytic model of a nearly incompressible viscoelastic periodontal ligament is suggested, employing symmetrical paraboloids to describe its internal and external surfaces. METHODS In the model, a tooth root is assumed to be a rigid body,...

marine industry requires continued development of new technologies in order to produce oil. an essential requirement in design is to be able to compare experimental data from prototype structures with predicted information from a corresponding analytical finite element model. in this study, structural model updating may be defined as the fit of an existing analytical model in the light of measu...

We describe an analytical performance model for IEEE Futurebus+-based systems with emphasis on real-time applications. The performance model forms the basis of a design tool for Futurebus+ systems. With this design tool, the expected execution-time behavior of planned multiprocessor-based systems may be assessed. The performance model consists of two levels: The bus level model and the applicat...

In this paper, an approximate, Padhye model based TCP throughput calculation method is presented for mobile data services over HSDPA. The Padhye model is defining the TCP throughput based on two input parameters: the packet loss probability and the TCP Round Trip Time. In order to provide the input parameters for the TCP throughput calculation, an equivalent queuing network model of the HSDPA s...

We develop an analytical delay model based on rst and second moments to incorporate inductance e ects into the delay estimate for interconnection lines. Delay estimates using our analytical model are within 15% of SPICE-computed delay across a wide range of interconnect parameter values. We also extend our delay model for estimation of source-sink delays in arbitrary interconnect trees. For the...

We introduce a model of the Relentless Congestion Control proposed by Matt Mathis. Relentless Congestion Control (RCC) is a modification of the AIMD (Additive Increase Multiplicative Decrease) congestion control which consists in decreasing the TCP congestion window by the number of lost segments instead of halving it. Despite some on-going discussions at the ICCRG IRTF-group, this congestion c...