Abstract: The invention proposes a directory server capable of interacting with entries organized in a tree structure in a directory server system. The entries comprise user entries. The directory server has a password checking function capable of checking the password for a user entry, based on password-related data. The password checking function is responsive to a user entry having extra data associated thereto, and identifying an additional entry, for executing a distinct password checking based on the password related data defined in that additional entry.

Abstract: Automated in-situ instrumentation has been developed for sensitive, precise and accurate measurements of a variety of analytes in natural waters. In this work we describe the use of ‘SEAS’ (Spectrophotometric Elemental Analysis System) instrumentation for measurements of solution pH. SEAS-pH incorporates a CCD-based spectrophotometer, an incandescent light source, and dual pumps for mixing natural water samples with a sulfonephthalein indicator. The SEAS-pH optical cell consists of either a liquid core waveguide (LCW, Teflon AF 2400) or custom-made PEEK tubing. Long optical pathlengths allow use of indicators at low concentrations, thereby precluding indicator-induced pH perturbations. Laboratory experiments show that pH measurements obtained using LCW and PEEK optical cells are indistinguishable from measurements obtained using conventional spectrophotometric cells and high-performance spectrophotometers.

Abstract: The invention proposes a directory server capable of interacting with entries organized in a tree structure in a directory server system. The entries comprise user entries. The directory server has a password checking function capable of checking the password for a user entry, based on password-related data. The password checking function is responsive to a user entry having extra data associated thereto, and identifying an additional entry, for executing a distinct password checking based on the password related data defined in that additional entry.