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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. Because of this low quality and unreliability, these early key finders were soon discarded and ...
"A newspaper article is a primary source if it reports events, but a secondary source if it analyses and comments on those events." "Characteristically, primary sources are contemporary to the events and people described [e.g., like a newspaper article on a current event]... Examples of primary sources include...newspaper ads and stories.
RubyGems integrates with Ruby run-time loader to help find and load installed gems from standardized library folders. Though it is possible to use a private RubyGems repository, the public repository is most commonly used for gem management. The public repository helps users find gems, resolve dependencies and install them. RubyGems is bundled ...
Available from Elsevier under the product name Reaxys [24] Bibliographie de civilisation médiévale: Medieval studies: A bibliography of monographs on the Middle Ages. As of 2018, it contains about 65,000 fully classified bibliographic records. Subscription Produced by the University of Poitiers. Available from Brepols Publishers. [25 ...
Primary ore deposits contain primary ores that may develop a geochemical dispersion halo known as primary dispersion expressions. [6] "These primary expressions are syndepositional in nature, and thus can occur at or close to the time of ore formation". [6] Primary ore expressions may show alteration of the host rocks.
Self-published sources can be primary, secondary, or tertiary sources. A personal blog is always a self-published source. Here are examples of how different postings on the same blog could be classified: When the blog posting provides information about what the author cooked last night, it is a primary source for its subject matter.
This wall painting found in the Roman city of Pompeii is an example of a primary source about people in Pompeii in Roman times (portrait of Terentius Neo).. In the study of history as an academic discipline, a primary source (also called an original source) is an artifact, document, diary, manuscript, autobiography, recording, or any other source of information that was created at the time ...
One of those keys per table may be designated the primary key; other keys are called alternate keys. Any key may consist of one or more attributes. For example, a Social Security Number might be a single attribute key for an employee; a combination of flight number and date might be a key consisting of two attributes for a scheduled flight.