EftelingEfteling (ˈɛftəlɪŋ) is a fantasy-themed amusement park in Kaatsheuvel, the Netherlands. The attractions reflect elements from ancient myths and legends, fairy tales, fables, and folklore. The park was opened on May 31, 1952. It evolved from a nature park with a playground and a Fairytale Forest into a full-sized theme park. It now caters to both children and adults with its cultural, romantic, and nostalgic themes, in addition to its wide array of amusement rides including six roller coasters and four dark rides.
Web Ontology LanguageThe Web Ontology Language (OWL) is a family of knowledge representation languages for authoring ontologies. Ontologies are a formal way to describe taxonomies and classification networks, essentially defining the structure of knowledge for various domains: the nouns representing classes of objects and the verbs representing relations between the objects. Ontologies resemble class hierarchies in object-oriented programming but there are several critical differences.
Experimental testing of time dilationTime dilation as predicted by special relativity is often verified by means of particle lifetime experiments. According to special relativity, the rate of a clock C traveling between two synchronized laboratory clocks A and B, as seen by a laboratory observer, is slowed relative to the laboratory clock rates. Since any periodic process can be considered a clock, the lifetimes of unstable particles such as muons must also be affected, so that moving muons should have a longer lifetime than resting ones.
