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Principles. In ray tracing, rays are often modeled as geometric ray with no thickness to perform efficient geometric queries such as a ray-triangle intersection.From a physics of light transport point of view, however, this is an inaccurate model provided the pixel on the sensor plane has non-zero area.
List of academic databases and search engines. This article contains a representative list of notable databases and search engines useful in an academic setting for finding and accessing articles in academic journals, institutional repositories, archives, or other collections of scientific and other articles. Databases and search engines differ ...
Radar beacon. Racon signal as seen on a radar screen. This beacon receives using sidelobe suppression and transmits the letter "Q" in Morse code near Boston Harbor (Nahant) 17 January 1985. Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1 ...
Elasticsearch is a search engine based on the Lucene library. It provides a distributed, multitenant -capable full-text search engine with an HTTP web interface and schema-free JSON documents. Elasticsearch is developed in Java and is dual-licensed under the ( source-available) Server Side Public License and the Elastic license, [2] while other ...
IDOL Enterprise Desktop Search, HP Autonomy Universal Search. Proprietary, commercial Beagle: Linux: Open-source desktop search tool for Linux based on Lucene. Unmaintained since 2009. A mix of the X11/MIT License and the Apache License: Copernic Desktop Search: Windows: Major desktop search program.
Optics Classification and Indexing Scheme (OCIS) is a categorization scheme used to encode the topic of an article or presentation in a 7-digit code. The system is used by the Optical Society of America in the organization of conferences and for journal publications. Authors are required to choose one or several OCIS numbers at submission.
A nuclear magnetic resonance spectra database is an electronic repository of information concerning Nuclear magnetic resonance (NMR) spectra. Such repositories can be downloaded as self-contained data sets or used online. The form in which the data is stored varies, ranging from line lists that can be graphically displayed to raw free induction ...
Geographic map of registration prefixes. An aircraft registration is a code unique to a single aircraft, required by international convention to be marked on the exterior of every civil aircraft. The registration indicates the aircraft's country of registration, and functions much like an automobile license plate or a ship registration.