The road safety performance of countries is conducted by combining seven main risk indicators into one index using a particular weighting and aggregation method. Weights can be determined with respect to the assumed importance of the indicator, whereas aggregation operators can be used to stress better performances differently from worse performances irrespective of the indicator’s meaning. In ...

For measuring the usability of web-based services a checklist tool is developed. It presents a modification of SERVQUAL model for measuring service quality extended with usability dimensions. By this tool a quantitative usability index is determined. A case study with university student information system including 179 students is carried out. By a structural equation model the weighting coeffi...

Copyright c ©1997 IEEE. Reprinted from IEEE Information Theory Society Newsletter, Vol. 47, No. 1, March 1997. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obt...

We describe a sequential universal data compression procedure for binary tree sources that performs the \double mixture". Using a context tree, this method weights in an eecient recursive way the coding distributions corresponding to all bounded memory tree sources, and achieves a desirable coding distribution for tree sources with an unknown model and unknown parameters. Computational and stor...

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zs denotes the concatenation of a data zz and a string s, l(s) is the length of a string s, 0 < ps < 1 is a constant given to a string s if 0 < l(s) 5 D 1, ,Bs = 0 if 2(s) = D (D > 1: some integer), Q,(x;) is the product of the predicted probabilities over the time instances such that the string defined below is s. The CTW assumes that the source is some tree source: the probability of x1+1 E A...

Currently, several state and federal agencies are proposing upper limits on soil test phosphorus (P), above which animal manures cannot be applied, based on the assumption that high P concentrations in runoff are due to high soil test P. Recent studies show that other factors are more indicative of P concentrations in runoff from areas where manure is being applied. The original P index was dev...

Alignment of time series is an important problem to solve in many scientific disciplines. In particular, temporal alignment of two or more subjects performing similar activities is a challenging problem due to the large temporal scale difference between human actions as well as the inter/intra subject variability. In this paper we present canonical time warping (CTW), an extension of canonical ...

Context tree weighting method is a universal compression algorithm for FSMX sources. Though we expect that it will have good compression ratio in practice, it is difficult to implement it and in many cases the implementation is only for estimating compression ratio. Though Willems and Tjalkens showed practical implementation using not block probabilities but conditional probabilities, it is use...