Laser diode optical frequency stabilisation technique on ITU-T frequency grid employing modulated sideband light

A novel optical frequency stabilisation technique on the ITU-T frequency grid employing modulated sideband light is proposed. The L-band laser diode second sideband light generated by phase-modulation is locked to a carbon monoxide ¹²C¹⁶O gas absorption line; the original carrier is placed on the ITU-T frequency grid. The square root of Allan variance of 10^-8 has been achieved for a period of 12 h.     

A knowledge representation and inference system for procedural law

KRIP-2 is a name of a software tool for building expert systems of a legal problem. It was developed to build an expert system for the Patent Law. Laws can be classified into the substantive laws and the procedural laws, and the Patent Law contains both of them. As these laws have different features, it is inconvenient to develop the knowledge base of these in the same knowledge representation. To develop a knowledge base of laws, a knowledge representation language KRIP/L was introduced. KRIP/L was an integration of the object oriented concept and extended Prolog, and has useful mechanisms to describe the phenomena occured in the legal problem. KRIP/L-2 is the second version of KRIP/L. KRIP-2 is an implementation of KRIP/L-2, and composed of some utility modules. KRIP-2 is implemented in Prolog, and an expert system for the Patent Law is developed in KRIP-2.