摘要:
An electrolytic cell is suitable for production of aluminium, and includes at least one collector bar made of first metal and at least one complementary bar made of a second metal having an electrical conductivity greater than the first metal and arranged adjacent to one of the side faces of the collector bar so that the external end of the complementary bar is at a specified distance from a specified end face of the block. The second end terminates so as to limit heat losses from said cell. The cell makes it possible to obtain significantly lower voltage drops while avoiding excessive heat losses through the collector bars.
摘要:
This invention relates to a remotely optically powered fiber optic switch, e.g. in a fiber optic network, and a GRIN-rod (Graded-Refractive-Index-rod) lens with integrated planar mirror as a switching element, in particular suited for fiber optic switches. A distribution panel, in which the switching element, a wavelength-division demultiplexer, a light-into-current converter, and an actuator for the switching element are situated, is remotely optically powered from a station in the network. Part of this station is a laser diode which feeds a powering lightwave via a wavelength-division multiplexer into an optical fiber interconnecting the station with the distribution panel, which fiber can also be used for data transmission. The light-into-current converter receives the powering lightwave and generates an electric current for driving the actuator and moving the switching element. A GRIN-rod lens with integrated planar mirror serves as switching element by rotating it in a ferrule and establishing different light paths depending on the position of the integrated mirror with respect to lightwaves optically coupled to the end facets of the GRIN-rod.
摘要:
The invention relates to a luminescent security feature system, a substrate having said luminescent security feature, and an apparatus and method for checking the luminescent security feature.The invention is characterized in that, among other things, the security feature comprises at least two luminescent materials which produce corresponding, overlapping emission peaks in response to an excitation radiation.
摘要:
The invention relates to the field of chemistry and more specifically to the field of medicinal chemistry. The invention is directed to N-acyl-dipeptide-like compounds having the general formula I wherein substituents A, B, X, Y, R1, R2, and subscripts n, m, p and q have the same meanings as those given in the claims. The invention is equally directed to pharmaceutical compositions containing as an active ingredient at least one compound of general formula I either in acid or salt form with an organic or mineral base. The compounds persuant to the invention display interesting pharmacological properties which make them useful as drugs.