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  2. Finderscope - Wikipedia

    en.wikipedia.org/wiki/Finderscope

    Another type of finder commonly found on amateur telescopes is known as a reflector (reflex) sight. This non-magnifying sight (technically not a "scope") uses a type of beam splitter to "reflect" a reticle generated by collimating optics into the users field of view.

  3. Romance copula - Wikipedia

    en.wikipedia.org/wiki/Romance_copula

    The Portuguese copulas are ser and estar. As in Spanish, estar derived from Latin sto / stare: stare → *estare → estar. The copula ser developed both from svm and sedeo. Thus its inflectional paradigm is a combination of these two Latin verbs: most tenses derive from svm and a few from sedeo. E.g. derivation from sedeo: [1] sedere → seer ...

  4. Reflex finder - Wikipedia

    en.wikipedia.org/wiki/Reflex_finder

    A reflex finder is a viewfinder system with a mirror placed behind a lens. The light passing through the lens is reflected by the mirror to a focusing screen , usually ground glass . The image formed on this ground glass can be observed directly, giving a waist-level reflex finder, or through a redressing optical device (set of mirrors or prism ...

  5. ABBYY FineReader - Wikipedia

    en.wikipedia.org/wiki/ABBYY_FineReader

    ABBYY FineReader PDF is an optical character recognition (OCR) application developed by ABBYY. [ 2 ] [ 3 ] First released in 1993, the program runs on Microsoft Windows ( Windows 7 or later) and Apple macOS (10.12 Sierra or later).

  6. Height finder - Wikipedia

    en.wikipedia.org/wiki/Height_finder

    A height finder radar is a type of 2-dimensional radar that measures altitude of a target. The operator slews the antenna toward a desired bearing , identifies a target echo at a desired range on the range height indicator display, then bisects the target with a cursor that is scaled to indicate the approximate altitude of the target. [ 7 ]

  7. Pathfinder (library science) - Wikipedia

    en.wikipedia.org/wiki/Pathfinder_(Library_Science)

    Library clients can use pathfinders at their own pace, and may find them "more approachable" than a reference desk. Electronic pathfinders on a library website can be used 24 hours a day. [ 20 ] In higher education, embedding library subject guides into a learning management system has been shown to increase use of library resources among ...

  8. Information retrieval - Wikipedia

    en.wikipedia.org/wiki/Information_retrieval

    Feature-based retrieval models view documents as vectors of values of feature functions (or just features) and seek the best way to combine these features into a single relevance score, typically by learning to rank methods. Feature functions are arbitrary functions of document and query, and as such can easily incorporate almost any other ...

  9. Key finder - Wikipedia

    en.wikipedia.org/wiki/Key_finder

    Interior of a sound-based key finder. Early models of key finder were sound-based, and listened for a clap or whistle (or a sequence of same), then beeped for the user to find them. Determining what was a clap or a whistle proved difficult, resulting in poor performance and false alarms.