In a remote or local environment in which a sensor network always collects data produced by sensors attached to physical objects, the engine presented here saves the data sent through the Internet and searches for data segments that correspond to real-world events by using natural language (NL) words in a query that are input in an web browser. The engine translates each query into a physical quantity representation searches for a sensor data segment that satisfies the representation, and sends back the event occurrence time, place, or related objects as a reply to the query to the remote or local environment in which the web browser displays them. The engine, which we expect to be one of the upcoming Internet services, exemplifies the concept of symbiosis that bridges the gaps between the real space and the digital space.<\/p>","DOI":"10.4018\/jcini.2010010102","type":"journal-article","created":{"date-parts":[[2010,4,16]],"date-time":"2010-04-16T20:15:36Z","timestamp":1271448936000},"page":"30-44","source":"Crossref","is-referenced-by-count":3,"title":["The Event Search Engine"],"prefix":"10.4018","volume":"4","author":[{"given":"Takeshi","family":"Okadome","sequence":"first","affiliation":[{"name":"Kwansei Gakuin University, Japan"}]},{"given":"Yasue","family":"Kishino","sequence":"additional","affiliation":[{"name":"NTT Communication Science Laboratories, Japan"}]},{"given":"Takuya","family":"Maekawa","sequence":"additional","affiliation":[{"name":"NTT Communication Science Laboratories, Japan"}]},{"given":"Koji","family":"Kamei","sequence":"additional","affiliation":[{"name":"Advanced Telecommunications Research Institute International, Japan"}]},{"given":"Yutaka","family":"Yanagisawa","sequence":"additional","affiliation":[{"name":"NTT West, Japan"}]},{"given":"Yasushi","family":"Sakurai","sequence":"additional","affiliation":[{"name":"NTT Communication Science Laboratories, Japan"}]}],"member":"2432","reference":[{"key":"jcini.2010010102-0","doi-asserted-by":"publisher","DOI":"10.1109\/98.878531"},{"key":"jcini.2010010102-1","doi-asserted-by":"crossref","unstructured":"Briscoe, T., & Carroll, J. 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