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Articles 1 - 6 of 6
Full-Text Articles in Engineering
Current Concepts Review - Corrosion Of Metal Orthopaedic Implants, Joshua J. Jacobs, Jeremy L. Gilbert, Robert M. Urban
Current Concepts Review - Corrosion Of Metal Orthopaedic Implants, Joshua J. Jacobs, Jeremy L. Gilbert, Robert M. Urban
Biomedical and Chemical Engineering - All Scholarship
No abstract provided.
Birkman Screening And The Covariance Of The Fluid Velocity Of Fixed Beds, Ashok S. Sangani, Donald L. Koch, Reghan J. Hill
Birkman Screening And The Covariance Of The Fluid Velocity Of Fixed Beds, Ashok S. Sangani, Donald L. Koch, Reghan J. Hill
Biomedical and Chemical Engineering - All Scholarship
The phenomenon of Brinkman screening, whereby the fluid velocity disturbance produced by each particle in a fixed bed is attenuated by the forces that the fluid exerts on surrounding particles, plays a crucial role in limiting the range of velocity correlations in porous media and fixed beds. Koch and Brady [J. Fluid Mech. 154, 399 (1985)] showed theoretically that Brinkman screening leads to a finite hydrodynamic diffusion coefficient for fluid phase tracers in dilute fixed beds. In this Letter, we present the results of two simulation techniques (lattice-Boltzmann method and a multipole method) confirming the screening of the fluid velocity …
Enhancing Spatial Locality Via Data Layout Optimizations, Mahmut Kandemir, Alok Choudhary, J. Ramanujam, N. Shenoy
Enhancing Spatial Locality Via Data Layout Optimizations, Mahmut Kandemir, Alok Choudhary, J. Ramanujam, N. Shenoy
Electrical Engineering and Computer Science - All Scholarship
This paper aims to improve locality of references by suitably choosing array layouts. We use a new definition of spatial reuse vectors that takes into account memory layout of arrays. This capability creates two opportunities. First, it allows us to develop an array restructuring framework based on a combination of hyperplane theory and reuse vectors. Second, it allows us to observe the effect of different array layout optimizations on spatial reuse vectors. Since the iteration space based locality optimizations also change the spatial reuse vectors, our approach allows us to compare the iteration-space based and data-space based approaches in terms …
Compilation Techniques For Out-Of-Core Parallel Computations, Mahmut Kandemir, Alok Choudhary, J. Ramanujam, Rajesh Bordawekar
Compilation Techniques For Out-Of-Core Parallel Computations, Mahmut Kandemir, Alok Choudhary, J. Ramanujam, Rajesh Bordawekar
Electrical Engineering and Computer Science - All Scholarship
The difficulty of handling out-of-core data limits the performance of supercomputers as well as the potential of the parallel machines. Since writing an efficient out-of-core version of a program is a difficult task and virtual memory systems do not perform well on scientific computations, we believe that there is a clear need for compiler directed explicit I/O approach for out-of-core computations. In this paper, we first present an out-of-core compilation strategy based on a disk storage abstraction. Then we offer a compiler algorithm to optimize locality of disk accesses in out-of core codes by choosing a good combination of file …
Integrating Security Into The Curriculum, Cynthia E. Irvine, Shiu-Kai Chin, Deborah Frincke
Integrating Security Into The Curriculum, Cynthia E. Irvine, Shiu-Kai Chin, Deborah Frincke
Electrical Engineering and Computer Science - All Scholarship
The number of skilled practitioners of computer security who are able to address the complexities of modern technology and are familiar with successful approaches to system security is very small. People want security but are faced with two difficulties. First, they do not know how to achieve it in the context of their enterprises. They may not even know of a way to translate organizational procedures into policies, much less implement a set of mechanisms to enforce those policies. Second, they have no way of knowing whether their chosen mechanisms are effective. The recent US Presidential Commission on Critical Infrastructure …
Electromagnetic Scattering From Coated Strips Utilizing The Adaptive Multiscale Moment Method, C. Shu, T. K. Sarkar
Electromagnetic Scattering From Coated Strips Utilizing The Adaptive Multiscale Moment Method, C. Shu, T. K. Sarkar
Electrical Engineering and Computer Science - All Scholarship
The aim of this paper is to consider the problem of electromagnetic scattering from perfectly conducting strips coated with thin dielectric material by use of the adaptive multiscale moment method (AMMM). In the next section, the basic formulation is presented for analysis of scattering from coated conducting strips on the basis of a coupled system of electric- and magnetic-field integral equations. Section 3 outlines the computational methodology of the multiscale basis by use of the moment method. Section 4 presents AMMM to solve the coupled EM integral equations. Section 5 presents a variety of numerical examples for different coating strips …