COOL-WD: A Completeness Tool for Wikidata

Managing and Consuming Completeness Information for Wikidata Using COOL-WD

Wikidata is a fast-growing, crowdsourced, and entity-centric KB that currently stores over 100 million facts about more than 21 million entities. Such a vast amount of data gives rise to the question: How complete is information in Wikidata? It turns out that there is no easy answer since Wikidata currently lacks a means to describe the completeness of its stored information, as in, Which entit...

Enabling Fine-Grained RDF Data Completeness Assessment

Nowadays, more and more RDF data is becoming available on the Semantic Web. While the Semantic Web is generally incomplete by nature, on certain topics, it already contains complete information and thus, queries may return all answers that exist in reality. In this paper we develop a technique to check query completeness based on RDF data annotated with completeness information, taking into acc...

Quantitative WD-XRF calibration for small ceramic samples and their source material

DASTWAR: a tool for completeness estimation in magnitude-size plane

Today, great observatories around the world, devote a substantial amount of observing time to sky surveys. The resulted images are inputs of source finder modules. These modules search for the target objects and provide us with source catalogues. We sought to quantify the ability of detection tools in recovering faint galaxies regularly encountered in deep surveys. Our approach was based on com...

A hot white dwarf luminosity function from the Sloan Digital Sky Survey

Aims. We present a hot white dwarf (WD) luminosity function (LF) using data taken from the Sloan Digital Sky Survey (SDSS) Data Release 4. We present and discuss a combined LF, along with separate DA and non-DA as LFs. We explore the completeness of our LFs and interpret a sudden drop in the non-DA LF near 2 Mbol as a transition of the non-DA WD atmosphere into the DA one during WD evolution. O...