Search results for "versification"
showing 5 items of 185 documents
User session level diverse reranking of search results
2018
Most Web search diversity approaches can be categorized as Document Level Diversification (DocLD), Topic Level Diversification (TopicLD) or Term Level Diversification (TermLD). DocLD selects the relevant documents with minimal content overlap to each other. It does not take the coverage of query subtopics into account. TopicLD solves this by modeling query subtopics explicitly. However, the automatic mining of query subtopics is difficult. TermLD tries to cover as many query topic terms as possible, which reduces the task of finding a query's subtopics into finding a set of representative topic terms. In this paper, we propose a novel User Session Level Diversification (UserLD) approach bas…
Diversification in evolutionary arenas - assessment and synthesis
2019
Abstract Understanding how and why rates of evolutionary diversification vary is a central issue in evolutionary biology and ecology. The concept of adaptive radiation has attracted much interest, but is metaphorical and verbal in nature, making it difficult to quantitatively compare different evolutionary lineages or geographic regions. In addition, the causes of evolutionary stasis are relatively neglected. Here we review the central concepts in the evolutionary diversification literature and bring these together by proposing a general framework for estimating rates of diversification and quantifying their underlying dynamics, which can be applied across clades and regions and across spat…
Development of healthy eating in children: from research to public health perspective
2019
International audience
Essential oil crops for sustainable agriculture - A review
2009
Multifunctionality and diversification of farming systems, integration of agricultural practices both inter se and with the non-agricultural productive systems operating on the territory, biodiversity safeguards, and reduction in off-farm inputs, are key factors for all modern development strategies in agricultural areas. Such issues are valid worldwide, but are especially true in areas in which the cultivation of the more widespread and “classical” crops is constrained by factors of varying degree and importance. In Mediterranean areas, where many environmental and economic factors often reduce rural areas to marginal conditions, the search for new crop opportunities has become one of the …
Evolución de la oferta exportable en Santander, Colombia 2000-2012: Un análisis a través del índice Herfindahl Hirschmann
2016
Este documento tuvo como objetivo analizar la evolución de la oferta exportadora de Santander entre el año 2000 y 2012, revisando los patrones de concentración o diversificación. Para ello utilizó como metodología el cálculo del índice de Herfindahl-Hirschmann. Los hallazgos encontrados establecen que la oferta exportable se ha concentrado por lo que las políticas diseñadas para promover la diversificación de producto no han tenido los efectos esperados y es necesario el diseño de nuevos lineamientos para tal fin.