Projection pursuit index measuring quality of projected clusters (QPC) introduced recently optimizes projection directions by minimizing leave-one-out error searching for pure localized clusters. QPC index has been used in constructive neural networks to discover non-local clusters in high-dimensional multiclass data, reduce dimensionality, aggregate features, visualize and classify data. Howev...

Customer satisfaction is commonly acknowledged as one of the useful proxy measures of ecommerce system effectiveness, which in turn leads to business success. This study proposes an effective ecommerce system development by means of the conceptualization and measurement of an e-commerce user satisfaction index. The proposed construct is defined and empirical validation of the index and its dime...

1 Lecture 3: Capturing Functions in High Dimensions 1.1 Classifying High Dimensional Functions: Our last two lectures will study the problem of approximating (or capturing through querries) a function f defined on Ω ⊂ RN with N very large. The usual way of classifying functions is by smoothness. The more derivatives a function has the nicer it is and the more efficiently it can be numerically a...

Widespread interest in time-series similarity search has made more in need of efficient technique, which can reduce dimensionality of the data and then to index it easily using a multidimensional structure. In this paper, we introduce a technique, which we called grid representation, based on a grid approximation of the data. We propose a lower bounding distance measure that enables a bitmap ap...

We describe a new access method, the hBΠ-tree, an adaptation of the Lomet and Salzberg hB-tree index to the constraints of their Π-tree . The Π-trees, a generalization of the Blink-trees of Lehman and Yao, provide very high concurrency with recovery, hence permitting highly parallel access to data. The hB-tree is a multi-attribute index which is highly insensitive to dimensionality. The combina...

Carrier doping into two dimensional (2D) Mott insulators is one of the prospective strategies for exploring exotic quantum phenomena. Although ultra-thin oxide films are such target, it vitally important to fabricate well-defined and clean samples extract intrinsic properties. In this study, we start from establishing growth SrVO 3 with a low residual resistivity (∼4 × 10 −7 Ω cm) high mobility...

This paper concerns some notes about the inequality index based on the ratios between lower and upper arithmetic means recently proposed by Zenga [2006]. Beside some definitions and notation given in section 2, we show (section 3) that the inequality measure proposed fulfills the population replication principle. In the remainder of the paper our purpose is to consider a population partitioned ...

background: inadequate depth of anesthesia leads to release of stress hormones. electroencephalographic monitoring by bispectral index is a guide to asses the depth of anesthesia. the aim of the present study was to measure the serum cortisol levels as an index of stress response in patients who are candidates for coronary artery bypass graft surgery in two groups of patients.   methods: sevent...