The actual performance of parallel programs is often disappointing, especially in comparison to the peak performance ooered by the underlying hardware. There are many sources of performance degradation and understanding these sources is necessary to improve application performance. In this paper we discuss performance modeling, an approach to understanding the performance of parallel systems. W...

Operational performance evaluation and process improvement in hotels have been the focus of several studies, a number of which have used Data Envelopment Analysis (DEA) to evaluate the operational performance of hotels in different destinations. This study sets out to evaluate the operational efficiency of twenty-three tourist hotels in Taipei over five years (2003 to 2007) using DEA models and...

This paper presents results from an auditory-visual recognition experiment employing short utterances of German produced with varying attitudinal expressions. It is based on 16 different kinds of social and/or propositional attitudes which place speakers in various social interactions with a partner of inferior, equal or superior status, and having a communication aim with a positive, neutral o...

In order to evaluate the multistage supply chain efficiency, an appropriate performance evaluation system is importantly required. A representative multistage supply chain has three members composing a supplier-manufacturer-retailer structure, and has intermediate measures connecting these supply chain members. Existing data envelopment analysis (DEA) models have difficulties in measuring these...

Both speech and music can be organized as hierarchical, nested groupings of units. In speech, for instance, phonemes can group to form syllables, which group to form words, which group to form sentences, and so on. In music, notes can group to form phrases, which group to form chord progressions, which group to form verses, and so on. We present a new method for extracting events (amplitude pea...

This paper focuses on a novel framework for information retrieval of images based only on color information. Regions homogeneous in color of the input image are detected using a multiresolution analysis. In order to avoid the selection of regions having similar color, a new clustering scheme based on repulsion between electric charges, is proposed. The resulting model is completely automatic an...

It is well known that systematic differences exist between modeled and observed realizations of hydrological variables like soil moisture. Prior to data assimilation, these differences must be removed in order to obtain an optimal analysis. A number of rescaling approaches have been proposed for this purpose. These methods include rescaling techniques based on matching sampled temporal statisti...

This paper deals with theoretical and practical results on aperture synthesis. Full attention is devoted to the Fourier synthesis operation , which proves to be the central issue with regard to the global problem. Diierent regularization techniques are shown to derive from a unique principle: the Principle of Maximum Entropy on the Mean (PMEM). This is the case for WIPE, as well as for the trad...