Words Context Analysis for Improvement of Information Retrieval

Author(s):  
Julian Szymański
2018 ◽  
Author(s):  
Fabiano Tavares Da Silva ◽  
José Everardo Bessa Maia

This article presents Luppar, an Information Retrieval tool for closed collections of documents which uses a local distributional semantic model associated to each corpus. The system performs automatic query expansion using a combination of distributional semantic model and local context analysis and supports relevancy feedback. The performance of the system was evaluated in databases of different domains and presented results equal to or higher than those published in the literature.


2018 ◽  
Author(s):  
Fabiano Tavares Da Silva ◽  
José Everardo Bessa Maia

This work proposes and evaluates an approach to query expansion in Information Retrieval based on Local Context Analysis using a Distributional Semantic Representation. In general, the approach performed better compared to that of query expansion using non-distributional, local or global techniques, running over datasets of different application domains.


2008 ◽  
Vol 22 ◽  
pp. 37-62 ◽  
Author(s):  
Bert Cornillie ◽  
Nicole Delbecque

This paper proposes an alternative cognitive account of the notion of speaker commitment in terms of speaker involvement and processing. The focus will be on the role of the speaker as conceptualizer. Invoking conceptualizer-related processing instead of speaker commitment has the advantage of avoiding reliance on non-speakerrelated dimensions to determine degrees of speaker commitment for introducing some propositional content. Our theoretical claim is based on two case studies from Spanish. First, canonical direct que ‘that’-clauses and oblique de que ‘of that’-clauses present an occasional switch to the alternate oblique and non-oblique construction, known as dequeísmo and queísmo, respectively. Dequeísmo has hitherto been related to notions such as doubt, hearsay, or distancing, i.e., to weak speaker commitment. Context analysis, however, shows that this approach is descriptively inadequate and that the phenomenon can best be accounted for in terms of speaker involvement: the speaker-conceptualizer is highly involved in selective information retrieval. Queísmo, by contrast, minimizes stage-managing, thus yielding low speaker involvement. In both cases, the relative strength of the speaker’s commitment is to be inferred on other grounds. Second, the Spanish modals poder, deber and tener que have been described in terms of weak, intermediate and strong speaker commitment. Yet, it will be shown that speaker involvement in downplaying the force structure decreases from poder to tener que. The more the deontic background can be subjectified the more the speaker is involved in the subjective construal. Here, weak commitment thus correlates with strong speaker involvement, and vice versa.


1997 ◽  
Vol 31 (SI) ◽  
pp. 140-147 ◽  
Author(s):  
Mark A. Stairmand

Author(s):  
Richard E. Hartman ◽  
Roberta S. Hartman ◽  
Peter L. Ramos

We have long felt that some form of electronic information retrieval would be more desirable than conventional photographic methods in a high vacuum electron microscope for various reasons. The most obvious of these is the fact that with electronic data retrieval the major source of gas load is removed from the instrument. An equally important reason is that if any subsequent analysis of the data is to be made, a continuous record on magnetic tape gives a much larger quantity of data and gives it in a form far more satisfactory for subsequent processing.


Author(s):  
Hilton H. Mollenhauer

Many factors (e.g., resolution of microscope, type of tissue, and preparation of sample) affect electron microscopical images and alter the amount of information that can be retrieved from a specimen. Of interest in this report are those factors associated with the evaluation of epoxy embedded tissues. In this context, informational retrieval is dependant, in part, on the ability to “see” sample detail (e.g., contrast) and, in part, on tue quality of sample preservation. Two aspects of this problem will be discussed: 1) epoxy resins and their effect on image contrast, information retrieval, and sample preservation; and 2) the interaction between some stains commonly used for enhancing contrast and information retrieval.


Author(s):  
Fox T. R. ◽  
R. Levi-Setti

At an earlier meeting [1], we discussed information retrieval in the scanning transmission ion microscope (STIM) compared with the electron microscope at the same energy. We treated elastic scattering contrast, using total elastic cross sections; relative damage was estimated from energy loss data. This treatment is valid for “thin” specimens, where the incident particles suffer only single scattering. Since proton cross sections exceed electron cross sections, a given specimen (e.g., 1 μg/cm2 of carbon at 25 keV) may be thin for electrons but “thick” for protons. Therefore, we now extend our previous analysis to include multiple scattering. Our proton results are based on the calculations of Sigmund and Winterbon [2], for 25 keV protons on carbon, using a Thomas-Fermi screened potential with a screening length of 0.0226 nm. The electron results are from Crewe and Groves [3] at 30 keV.


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