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In use of saturable Cr(4+):YAG crystals, we have demonstrated the stable Q-switched and mode-locked (QML) operation of the Nd:LuVO(4) laser. The operation range of QML in use of the Cr(4+):YAG is larger than that use of SESAM and NLM. The obtained shape of Q-switched envelope, repetition rate and pulse energy are demonstrated to depend on the initial transmittance of the Cr(4+):YAG and reflecti...

The National Library of Medicine (NLM), part of the National Institutes of Health in Bethesda, Maryland, is the world’s largest medical library. In 1879, NLM began publishing Index Medicus, a unified international database of biomedical literature. Index Medicus has since evolved into MEDLINE, an online electronic database searchable by using PubMed; it remains the world’s most important index ...

BACKGROUND After the release of compressed sensing (CS) theory, reconstruction algorithms from sparse and incomplete data have shown great improvements in diminishing artifacts of missing data. Following this progress, both local and non-local regularization induced iterative reconstructions have been actively used in limited view angle imaging problems. METHODS In this study, a 3D iterative ...

Two articles in a recent issue of the Communications of the ACM put forth somewhat alarming claims about the role of the Internet in our lives. Columnist Peter Neumann observed that “we seem to have evolved into a mentality of ‘If it’s not on the Internet, it doesn’t exist.’” Neumann also noted that the Web duplicates very little of the material we might find in traditional institutions like pu...

The objective of NLM's Indexing Initiative (IND) is to investigate methods whereby automated indexing methods partially or completely substitute for current indexing practices. The project will be considered a success if methods can be designed and implemented that result in retrieval performance that is equal to or better than the retrieval performance of systems based principally on humanly a...

The National Library of Medicine (NLM) librarians provided support to the first thirteen panels sponsored by the Agency for Health Care Policy and Research by conducting literature searches, providing document delivery, and preparing bibliographic databases. Since then, NLM has moved into a consulting role, helping panels link up with local members of the National Network of Libraries of Medici...