Showing papers on "Watermark published in 1988"
TL;DR: The authors survey the classical hashing-function approach to information retrieval and show how general hashing techniques exchange speed for memory space and flexibility in data manipulation operations such as insert, delete, and overflow.
Abstract: The authors survey the classical hashing-function approach to information retrieval and show how general hashing techniques exchange speed for memory space and flexibility in data manipulation operations such as insert, delete, and overflow. They also discuss recent developments in perfect hashing and minimal perfect hashing, which provide speed and memory compactness when the keys are known in advance. >
48 citations
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TL;DR: A Will which purportedly was made in 1980 was suspected to have been fraudulently drawn up in 1984 and the watermark in the paper provided proof that the Will could not have been in existence before 1983.
Abstract: This paper describes a case in which the authors were able to date a piece of paper. A Will which purportedly was made in 1980 was suspected to have been fraudulently drawn up in 1984. The watermark in the paper provided proof that the Will could not have been in existence before 1983.
9 citations