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EICAR test file. The EICAR Anti-Virus Test File [1] or EICAR test file is a computer file that was developed by the European Institute for Computer Antivirus Research (EICAR) and Computer Antivirus Research Organization (CARO) to test the response of computer antivirus (AV) programs. [2] Instead of using real malware, which could cause real ...
Technosignatures: Signatures that indicate a technologically advanced civilization. Viability. Determining whether a potential biosignature is worth investigating is a fundamentally complicated process. Scientists must consider any and every possible alternate explanation before concluding that something is a true biosignature.
An autograph is a person's own handwriting or signature. The word autograph comes from Ancient Greek ( αὐτός, autós, "self" and γράφω, gráphō, "write"), and can mean more specifically: [1] [2] a manuscript written by the author of its content. [1] [2] In this meaning the term autograph can often be used interchangeably with holograph.
Biological specimen. Biological specimens in an elementary school science lab. A biological specimen (also called a biospecimen) is a biological laboratory specimen held by a biorepository for research. Such a specimen would be taken by sampling so as to be representative of any other specimen taken from the source of the specimen.
A laboratory specimen is sometimes a biological specimen of a medical patient 's tissue, fluids, or other samples used for laboratory analysis to assist in differential diagnosis or staging of a disease process. These specimens are often the most reliable method of diagnosis, depending on the ailment. For example, breast cancer biopsies ...
The RIS file format —two letters, two spaces and a hyphen—is a tagged format for expressing bibliographic citations. According to the specifications, [3] [4] [5] the lines must end with the ASCII carriage return and line feed characters. Note that this is the convention on Microsoft Windows, while in other contemporary operating systems ...
An isotopic signature (also isotopic fingerprint) is a ratio of non-radiogenic ' stable isotopes ', stable radiogenic isotopes, or unstable radioactive isotopes of particular elements in an investigated material. The ratios of isotopes in a sample material are measured by isotope-ratio mass spectrometry against an isotopic reference material.
In the "trace-over method", the sheet of paper containing the genuine signature is placed on top of the paper where the forgery is required. The signature is traced over, appearing as a faint indentation on the sheet of paper underneath. This indentation can then be used as a guide for a signature. [1]
Specimen banknote. A specimen banknote is printed generally in very limited quantities for distribution to central banks to aid in the recognition of banknotes from a country other than their own. In some cases, specimen banknotes are printed in less limited quantities distributed to commercial banks, or even to commercial enterprises and the ...
Specimen stamp. A specimen registered envelope from Natal. A specimen stamp is a postage stamp or postal stationery indicium sent to postmasters and postal administrations so that they are able to identify valid stamps and to avoid forgeries. [1] The usual method of invalidating the stamps is either overprinting in ink or perforating the word ...