11,252 research outputs found

    Report of MIRACLE team for Geographical IR in CLEF 2006

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    The main objective of the designed experiments is testing the effects of geographical information retrieval from documents that contain geographical tags. In the designed experiments we try to isolate geographical retrieval from textual retrieval replacing all geo-entity textual references from topics with associated tags and splitting the retrieval process in two phases: textual retrieval from the textual part of the topic without geo-entity references and geographical retrieval from the tagged text generated by the topic tagger. Textual and geographical results are combined applying different techniques: union, intersection, difference, and external join based. Our geographic information retrieval system consists of a set of basics components organized in two categories: (i) linguistic tools oriented to textual analysis and retrieval and (ii) resources and tools oriented to geographical analysis. These tools are combined to carry out the different phases of the system: (i) documents and topics analysis, (ii) relevant documents retrieval and (iii) result combination. If we compare the results achieved to the last campaign’s results, we can assert that mean average precision gets worse when the textual geo-entity references are replaced with geographical tags. Part of this worsening is due to our experiments return cero pertinent documents if no documents satisfy de geographical sub-query. But if we only analyze the results of queries that satisfied both textual and geographical terms, we observe that the designed experiments recover pertinent documents quickly, improving R-Precision values. We conclude that the developed geographical information retrieval system is very sensible to textual georeference and therefore it is necessary to improve the name entity recognition module

    Are the MCVL tax data useful? Ideas for mining

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    This article analyzes the tax data from the Spanish “Continuous Sample of Working life”, which contains an overview for each fiscal year of all income tax withholdings and prepayments on earned income, economic activities and income assignments of salaried workers, pensioners and recipients of unemployment benefits. To that end, we present the characteristics of these data; we provide a detailed statistical description for the years 2004-2009, linked to information from personal files and those of contributors to the Spanish social security system; and we highlight the opportunities for analysis of some issues related to the labour market and income distribution.tax data, MCVl, income, labour market, panel dat

    The influence of previous labour market experiences on subsequent job tenure

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    The aim of this paper is to analyse the influence of individual’s previous labour market experiences on the duration of subsequent job matches in the Spanish labour market. The study draws on a sample of workers extracted from a Spanish administrative dataset. We find evidence on the existence of a scarring effect: the longer the time spent in non-employment since previous job separation, the shorter the duration of subsequent re-employment relationships. Other result is that workers whose previous job match terminated due to the ending of a temporary contract are very likely to come back to employment under another temporary job and have a higher probability of job termination. The exhaustion of unemployment benefits also seems to exert a scarring effect on job duration.job tenure, job separations, non-employment, employment.

    Monte Carlo simulation of the treatment of uveal melanoma using measured heterogeneous 106Ru plaques

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    Background/Aims: Ruthenium plaques are used for the treatment of ocular tumors. The aim of this work is the comparison between simulated absorbed dose distributions tallied in an anthropomorphic phantom, obtained from ideal homogeneous plaques, and real eye plaques in which the actual heterogeneous distribution of 106Ru was measured. The placement of the plaques with respect to the tumor location was taken into consideration to optimize the effectiveness of the treatment. Methods: The generic CCA and CCB, and the specific CCA1364 and CCB1256 106Ru eye plaques were modeled with the Monte Carlo code PENELOPE. To compare the suitability of each treatment for an anterior, equatorial and posterior tumor location, cumulative dose-volume histograms for the tumors and structures at risk were calculated. Results: Eccentric placements of the plaques, taking into account the inhomogeneities of the emitter map, can substantially reduce the dose delivered to structures at risk while maintaining the prescribed dose at the tumor apex. Conclusions: The emitter map distribution of the plaque and the computerized tomography of the patient used in a Monte Carlo simulation allow an accurate determination of the plaque position with respect to the tumor with the potential to reduce the dose to sensitive structures. © 2018 S. Karger AG, BaselPostprint (published version

    Learning sustainable metropolitan development for european students of planning

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    Today, environmental problems and metropolitan planning concerns most of the planners threw Europe. Consequently, it's important provide to the students tools and skills to solve them. Despite the diversity of knowledge and multiplicity of practical exercises given to the students, the methods developed by planners are heavily influenced by his own native culture. For example, Italians don't treat environmental problems and metropolization as Germans or French do. The metropolization varies from country to country. The specificity of each country approach is revealed by the legislation but also by the priority given to a particular aspect or by the tools used. Some countries focus on esthetics aspects or quantitative analysis while others prefer qualitative analysis and functional aspects. Learning this specialties is interesting because it helps one criticize his own knowledge and skills and it helps to collaborated with foreign planners. Conferences about compared analysis helps students improve understanding of foreign approaches but they don't necessary change one's behavior. We put 35 students together from five different countries (England, Germany, The Netherlands, France and Italy) for 10 days and we gave them a real environmental problem to solve. The topic of the programme changes each year. This year, the students deal with the environmental problem due to the extension of a medium metropolitan area. The students are mixed in multinational groups. Confronted with problems to solve, they must mobilize their skills, explain their particular point of view and find a compromise to solve the problem. The aim of this proposal is to explain how the students are prepared both to solve a real environmental problem and to accept another system of analysis
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