Under certain circumstances the polarisation state of the illumination can have a significant influence on the appearance of scenes; outdoor scenes with specular surfaces – such as water bodies or windows – under clear, blue skies are good examples of such environments. In cases like that it can be essential to use a polarising renderer if a true prediction of nature is intended, but so far no ...

As microprocessors become increasingly thermally constrained, microarchitecture and operating-system research will require temperature models that are reliable, fast, and easy to use. This goal is difficult to achieve with generalpurpose tools like those based on finite elements. We have developed a computationally efficient temperature model, called ATMI, using analytical methods. ATMI is spec...

| Memory hierarchies have long been studied by many means: system building, trace-driven simulation, and mathematical analysis. Yet little help is available for the system designer wishing to quickly size the di erent levels in a memory hierarchy to a rst-order approximation. In this paper, we present a simple analysis for providing this practical help and some unexpected results and intuition ...

In 1995 T. J. Penna introduced a simple model of biological aging. A modified Penna model has been demonstrated to exhibit behaviour 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, able to deal with arbitrary birth and survivability functions. This solution is empl...

We attempt to get a physical insight into grain alignment processes by studying basic properties of radiative torques (RATs). For this purpose we consider a simple toy model of a helical grain that reproduces well the basic features of RATs. The model grain consists of a spheroidal body with a mirror attached at an angle to it. Being very simple, the model allows analytical description of RATs ...

-The amount of information involved in strategic decision making and the computational limitations of human decision makers makes strategy selection a difficult task. Various approaches from sheer intuition to computerized decision systems have been proposed for strategy selection. In this paper we present an analytical model which systematically evaluates a series of strategic alternatives by ...

Temperature has become an important design constraint for high-performance microprocessors. Research on temperature-constrained microarchitecture requires an efficient modeling of temperature. We propose an analytical model of temperature, based on solving a boundary-value problem of heat conduction. The model gives steady-state and transient temperature at any point on the dissipating plane, a...

Abstract As process technology scales, the number of transistors that can fit in a unit area has increased exponentially. Processor throughput, memory storage, and memory throughput have all been increasing at an exponential pace. As such, DRAM has become an ever-tightening bottleneck for applications with irregular memory access patterns. Computer architects in industry sometimes use ad hoc an...

In this paper a fast analytical algorithm for design a surface-mounted PM Brushless DC motor (SMPM-BLDC) for variable-speed application based on electromagnetic field analysis and RSM optimization algorithm is discussed. To achieve the desired performance, the physical dimensions of the proposed SMPM-BLDC motor subject to minimal ripple torque utilizing RSM optimization algorithm were optimized...