In order to provide suitable results to the analyst needs, user preferences summarization is widely used in several domains. In this paper, we introduce a new approach for user profile construction from OLAP query logs. The key idea is to learn the user’s preferences by drawing the evidence from OLAP logs. In fact, the analyst preferences are clustered into three main pools : (i) consensual or ...

We have investigated the transmission and reflection properties of structures incorporating left-handed materials with graded index of refraction. We present an exact analytical solution to Helmholtz' equation for a graded index profile changing according to a hyperbolic tangent function along the propagation direction. We derive expressions for the field intensity along the graded index struct...

A semi-analytical technique to determine the propagation constant of periodically segmented Ti:LiNbO3 waveguide (PSW) is described. The 2-D refractive index profiles of the waveguide segments are computed from its fabrication parameters, such as, Ti-layer thickness and width, and the diffusion parameters. WKB method is used to transform 2-D refractive index profile to 1D lateral effective index...

A total of 730 Enterobacteriaceae strains isolated from 567 cultures were evaluated by a rapid kit method (Micro-ID; General Diagnostics, Morris Plains, N.J.; 4 h), an overnight incubation kit method (API 20E; Analytab Products, Plainview, N.Y.), and conventional biochemical test methodology (mostly overnight incubation and some rapid methods) to compare the amount of laboratory effort required...

Barbe and coworkers tested 318 isolates of Haemophilus and Neisseria species as well as Moraxella catarrhalis in an evaluation of the API NH kit in a study primarily addressing the ability of that kit to accurately identify organisms in its intended area of application (1). They found that only 1 of the 305 strains that were included in the kit database was identified incorrectly, and of the 13...

This study was undertaken to determine the epidemiology and antibiogram of Listeria species isolated from raw frozen Atlantic Mackerel (Scomber Scombrus) fish sold in Enugu State Southeastern Nigeria. Twentyfive grams each gut skin were collected 800 8 major markets randomly selected area. Isolation done using half full fraser broths, polymyxin acriflavine lithium chloride ceftazidime aesculin ...

The API 20E Analytical Profile Index typically suggests three or four conventional biochemical tests to complete the identification of strains either identified to genus only or that have multiple genera consistent with the profile number. We compiled a simple panel of eight rapid (4-h) tests that can substitute for the supplementary biochemical tests recommended by Analytab Products (Plainview...

Materials with negative permittivity and permeability can overcome the diffraction limit, thereby making the sub-wavelength imaging possible. In this study, we analyze the effects of gradient index on a half-infinite perfect lens. We assume that the sharp interface between the vacuum and the negative-index material is replaced by a smooth transition profile such that the index gradually changin...

Abstract The Standard Precipitation Index (SPI) is a widely used statistical technique for the characterization of droughts. It based on probabilistic standardization procedure, which converts Gamma-type probability distribution function (PDF) into normal (Gaussian) standard series with zero mean and unit deviation. Drought classification SPI indicates dry wet spell characteristics, provided th...