Quantitative Analysis Of Sets Research Articles

UDAT: Compound quantitative analysis of text using machine learning

Abstract Computing machines allow quantitative analysis of large databases of text, providing knowledge that is difficult to obtain without using automation. This article describes Universal Data Analysis of Text (UDAT) —a text analysis method that extracts a large set of numerical text content descriptors from text files and performs various pattern recognition tasks such as classification, similarity between classes, correlation between text and numerical values, and query by example. Unlike several previously proposed methods, UDAT is not based on frequency of words and links between certain key words and topics. The method is implemented as an open-source software tool that can provide detailed reports about the quantitative analysis of sets of text files, as well as exporting the numerical text content descriptors in the form of comma-separated values files to allow statistical or pattern recognition analysis with external tools. It also allows the identification of specific text descriptors that differentiate between classes or correlate with numerical values and can be applied to problems related to knowledge discovery in domains such as literature and social media. UDAT is implemented as a command-line tool that runs in Windows, and the open source is available and can be compiled in Linux systems. UDAT can be downloaded from http://people.cs.ksu.edu/∼lshamir/downloads/udat.

Cytogenetic differentiation of natural populations of Chironomus obtusidens (Diptera, Chironomidae)

The cytogenetic structure of Siberian and European populations of Chironomus obtusidens Goetgh. was studied. The clear differentiation of these populations was revealed using quantitative analysis of sets and frequencies of inversion banding sequences. The Siberian populations were found to have six new inversion sequences, and the alternative obtG2 sequence dominated instead of the main obtG1 sequence typical of European populations. In general, chromosomal polymorphism was 3–4 times higher in the Siberian populations. Therefore, the cytogenetic distances (Dcg) between the Siberian and European populations were higher (Dcg 0.059–0.097) than Dcg between the populations in each of the geographic zones investigated (Dcg 0–0.015). The NJ phylogenetic tree constructed for the chromosomal evolution of the genus Chironomus demonstrates that Chironomus obtusidens is the most divergent member among Palaearctic species of the obtusidens group. In addition, it is closer related to the Nearctic Ch. decorus group.

Equilibria Between Molecular and Ionic Complexes with an NH⋯N Hydrogen Bond. Fluorinated Aromatic Amine as a Proton Donor

Ultraviolet absorption spectra in the range 300-200 K were used to study the composition and structure of complexes formed in solutions by the fluorinated amine (4-CF3C6F4)2NH as a proton donor with dibutylamine. A program is developed for quantitative analysis of sets of the spectra of equilibrium multicomponent systems, that allow to find spectral and thermodynamic characteristics of the individual components. In the systems in study, 1:1 and 1:2 fluorinated diamine-dibutylamine complexes are formed. The first of them in a molecular complex with an NH⋯N hydrogen bond, and the second is an ionic proton-transfer complex. The equilibrium constants between the complexes and the free molecules are found, the enthalpies and entropies of formation of both complexes are found, and the spectra of the complexes are measured.