The Product Types Ontology for Semantic Web-based E-Commerce
PTO: The Product Types Ontology for Semantic Web-based E-Commerce
The Product Types Ontology: Good identifiers for product types based on Wikipedia
This service provides GoodRelations-compatible class definitions for any type of product or service that has an entry in the English Wikipedia.
Vocabulary: http://www.productontology.org/#
Namespace: http://www.productontology.org/
The Product Types Ontology is designed to be used in combination with GoodRelations, a standard vocabulary for the commercial aspects of offers.
See http://purl.org/goodrelations/ for more information.
2024-03-29T14:57:25.227540
The class abstracts and translations of labels are taken from Wikipedia, the free encyclopedia.
Martin Hepp
The class definition texts are taken from Wikipedia, the free encyclopedia under a Creative Commons Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0) license, see http://creativecommons.org/licenses/by-sa/3.0/. Accordingly, all ontology class definitions provided in here are available under the very same license.
E-Commerce, E-Business, GoodRelations, Ontology, Wikipedia, DBPedia
Flettner airplane
A Flettner airplane is a type of rotor airplane which uses a Flettner rotor to provide lift. The rotor comprises a spinning cylinder with circular end plates and, in an aircraft, spins about a spanwise horizontal axis. When the aircraft moves forward, the Magnus effect creates lift.
Anton Flettner, after whom the rotor is named, used it successfully as the sails of a rotor ship. He also suggested its use as a wing for a rotor airplane.
The Butler Ames Aerocycle was built in 1910 and tested aboard a warship. There is no record of it having flown.
The Plymouth A-A-2004 was built for Zaparka in 1930 by three anonymous American inventors. It was reported to have made successful flights over Long Island Sound.
An inherent safety concern is that if power to the rotating drums were lost—even if thrust was maintained—the aircraft would lose its ability to generate lift as the drum slowed and it would not be able to sustain flight.
(Source: Wikipedia, the free encyclopedia, see http://en.wikipedia.org/wiki/Flettner_airplane)
Rotorflugzeug
ローター飛行機
Samolot z rotorami Flettnera
Flettnerjevo letalo