Constitution and Conductivity of Metalloporphyrin Tapes

Microporous Porphyrin and Metalloporphyrin Materials

The diverse e4orts to rationally construct microporous solids using porphyrins and metalloporphyrins as molecular building blocks are reviewed. Porphyrin-based molecular crystals, hydrogen-bonded networks, and metal ion coordination polymer networks are examined in detail. Recurring geometrical motifs observed in the structural frameworks of di4erent porphyrinic solids are emphasized, and the i...

Coevolution of Machines and Tapes

A problem of self-referential paradox and self-reproduction is discussed in a network model of machines and tapes. A tape consists of a bit string, encoding function of a machine. Tapes are replicated when it is attached by an adequate machine. Generally, a tape is replicated but it may be di erent from the original one. In this paper, external noise evolves diversity in a system. New reaction ...

Unusual metalloporphyrin complexes of rhenium and technetium.

Taxation and the Constitution

Forensic acquisition and analysis of magnetic tapes

Recovering evidential data from magnetic tapes in a forensically sound manner is a difficult task. There are many different tape technologies in existence today and an even greater number of archive formats used. This paper discusses the issues and challenges involved in the forensic acquisition and analysis of magnetic tapes. It identifies areas of slack space on tapes and discusses the challe...