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  2. Philippine Institute of Volcanology and Seismology - Wikipedia

    en.wikipedia.org/wiki/Philippine_Institute_of...

    PHIVOLCS Observatory at Mount Hibok-Hibok.. The Philippine Institute of Volcanology and Seismology (PHIVOLCS, Filipino:; Filipino: Surian ng Pilipinas sa Bulkanolohiya at Sismolohiya [2]) is a Philippine national institution dedicated to provide information on the activities of volcanoes, earthquakes, and tsunamis, as well as other specialized information and services primarily for the ...

  3. PHIVOLCS earthquake intensity scale - Wikipedia

    en.wikipedia.org/wiki/PHIVOLCS_Earthquake...

    The PHIVOLCS earthquake intensity scale (PEIS; Filipino: Panukat ng Pagyanig ng Lindol) [1] is a seismic scale used and developed by the Philippine Institute of Volcanology and Seismology (PHIVOLCS) to measure the intensity of earthquakes. It was developed as upon a specific response to the 1990 Luzon earthquake. PHIVOLCS cites seismic scale ...

  4. List of active volcanoes in the Philippines - Wikipedia

    en.wikipedia.org/wiki/List_of_active_volcanoes...

    The list below showing 27 active volcanoes in the Philippines was based on the PHIVOLCS list with some included from the GVP. The number is not definite and depends on someone's definition of "active" or historical time frame. Descriptions under "eruptions" were based on the GVP website.

  5. List of potentially active volcanoes in the Philippines

    en.wikipedia.org/wiki/List_of_potentially_active...

    Help; Learn to edit; Community portal; Recent changes; Upload file; Special pages

  6. PAGASA - Wikipedia

    en.wikipedia.org/wiki/PAGASA

    The Philippine Atmospheric, Geophysical and Astronomical Services Administration (Filipino: Pangasiwaan ng Pilipinas sa Serbisyong Atmosperiko, Heopisiko at Astronomiko, [4] abbreviated as PAGASA, which means "hope" as in the Tagalog word pag-asa) is the National Meteorological and Hydrological Services (NMHS) agency of the Philippines mandated to provide protection against natural calamities ...

  7. Query by Example - Wikipedia

    en.wikipedia.org/wiki/Query_by_Example

    Query by Example (QBE) is a database query language for relational databases. It was devised by Moshé M. Zloof at IBM Research during the mid-1970s, in parallel to the development of SQL . [ 1 ] It is the first graphical query language, using visual tables where the user would enter commands, example elements and conditions.

  8. Datalog - Wikipedia

    en.wikipedia.org/wiki/Datalog

    FoundationDB provides a free-of-charge database binding for pyDatalog, with a tutorial on its use. [37] Leapsight Semantic Dataspace (LSD) is a distributed deductive database that offers high availability, fault tolerance, operational simplicity, and scalability. LSD uses Leaplog (a Datalog implementation) for querying and reasoning and was ...

  9. Tuple relational calculus - Wikipedia

    en.wikipedia.org/wiki/Tuple_relational_calculus

    A relational database schema is defined as a tuple S = (D, R, h) where D is the domain of atomic values (see relational model for more on the notions of domain and atomic value), R is a finite set of relation names, and h : R → 2 C. a function that associates a header with each relation name in R. (Note that this is a simplification from the ...