Injectives of strongly hereditary relative homological algebras

IfR is a strongly hereditary relative homological algebra of Abelian groups which contains the torsion split sequences, then theR-injectives can be completely characterized. IfR is a relative homological algebra with enough projectives and enough injectives, which contains the torsiol split sequences, then equivalent conditions forR to be strongly hereditary are given.     

Shock measurement with non-contacting fiber optic levers

The displacement, velocity, and acceleration performance limits of a non-contacting fiber optic lever vibration transducer are quantified. Performance characteristics are experimentally verified and measurements of displacement, velocity, and acceleration obtained from impacted plates are compared with those obtained by using conventional accelerometers. It is shown that all relevant transducer quantities, i.e., absolute maximum and minimum levels, dynamic range, and frequency response, lend themselves to quantification (or optimization) on a single graphic representation. The transducer is particularly useful for measuring high frequency shock parameters.     

Molecular integrals in terms of ellipsoidal gaussian-type orbitals

A method for the evaluation of molecular integrals over generalised gaussian functions is given.     

Untersuchung verschiedener Lebensmittel

Ohne Zusammenfassung     

The Connectedness of Space Curve Invariants

In this paper we will give necessary conditions for a Borel-fixed monomial ideal to be the generic initial ideal of a reduced, irreducible, non-degenerate curve in P³.