Computer Aided Architectural Design systems offer a broad scope of drawing and modeling techniques for the designer. Nevertheless, they offer limited support for the early phases of the design process. One reason is that the level of abstraction is too low: the user can define walls and such in great precision, but no support is offered to define global or structural characteristics of the desi...

ABS~ACT National and international standards committees are now discussing a two-byte code for multilingual information processing. This provides for 65,536 separate character and control codes, enough to make permanent code assiguments for all the charanters of ell national alphabets of the world, and also to include Chinese/Japanese characters. This paper discusses the kinds of flexibility re...

Frequent Itemset Mining (FIM) is one of the most investigated fields of data mining. The goal of Frequent Itemset Mining (FIM) is to find the most frequently-occurring subsets from the transactions within a database. Many methods have been proposed to solve this problem, and the Apriori algorithm is one of the best known methods for frequent Itemset mining (FIM) in a transactional database. In ...

In this report we analyze the performance of the fast Fourier transform (FFT) on graphics hardware (the GPU), comparing it to the best-of-class CPU implementation FFTW. We describe the FFT, the architecture of the GPU, and how general-purpose computation is structured on the GPU.We then identify the factors that influence FFT performance and describe several experiments that compare these facto...

Current Graphic Processing Units (GPUs) (circa. 2003/2004) have programmable vertex and fragment units. Often these units are implemented as SIMD processors employing parallel pipelines. Data dependent conditional execution on SIMD architectures implemented using processor idling is inefficient. I propose a multi-pass approach based on conditional streams which allows dynamic load balancing of ...

We present an algorithm for the fast tomography of vegetation, based on a Radon mathematical setting and on the combined use of advanced processing algorithms (NonUniform FFTs) and hardware resources (Graphic Processing Units GPUs). The algorithm performance is firstly numerically estimated, showing the favorable trade off between faithfulness and speed, and highlighting the convenience of the ...