Abstract:
An endoprosthesis includes a carrier structure which contains a metallic material. The metallic material contains a magnesium alloy of the following composition: magnesium: >90%, yttrium: 3.7%-5.5%, rare earths: 1.5%-4.4% and balance:
Abstract:
A magnesium alloy, comprising: Y:0.5-10 Zn:0.5-6 Ca:0.05-1 Mn: 0-0.5 Ag:0-1 Ce:0-1 Zr:0-1 or Si: 0-0.4, wherein the amounts are based on weight-percent of the alloy and Mg, and manufacturing-related impurities constitute the remainder of the alloy to a total of 100 weight-percent. Also disclosed is a method for manufacturing such an alloy and a biodegradable implant formed therefrom.
Abstract:
A system and method of determining an earliest delivery date for a demand on the basis of a fact table stored in a database, where the demand indicates both a desired date and a desired quantity for items from a stock, where a fact time series is comprised by and/or deducible from the fact table, and where the fact time series comprises fact tuples indicating both a fact date and a change in quantity of stock items that occurred on this fact date. The method includes generating an aggregated time series from the fact time series by defining and/or obtaining discrete time intervals, and generating, for at least one discrete time interval, an aggregated tuple indicating both its corresponding discrete time interval and the aggregated change in quantity of stock items that occurred in its corresponding discrete time interval.
Abstract:
An implant comprising an implant material forming a base made of one or more metallic elements; a diffusion layer covering the base made of at least one of the metallic elements of the implant material and at least magnesium; and, optionally, a metal layer covering the diffusion layer made of magnesium or a biocorrodible magnesium alloy.
Abstract:
Semiconductor devices and methods of manufacture thereof are disclosed. In one embodiment, a semiconductor device includes a workpiece having a buried layer disposed beneath a top portion thereof. A trench is disposed in the workpiece extending at least through the buried layer. At least one sinker contact is disposed in the top portion of the workpiece. The at least one sinker contact is proximate sidewalls of at least a portion of the trench and is adjacent the buried layer. An insulating material is disposed on the sidewalls of the trench. A conductive material is disposed within the trench and is coupled to a lower portion of the workpiece.
Abstract:
One embodiment of the invention relates to a biocorrodible implant based on magnesium or a biocorrodible magnesium alloy, whose surface has a corrosion-inhibiting coating. Furthermore, other invention embodiments relate to a respective manufacturing method for the coating. According to an invention embodiment, an implant is provided, comprising(i) an implant material comprising magnesium or a biocorrodible magnesium alloy forming a base;(ii) a diffusion layer, which covers the base and differs in composition from the implant material and contains at least one of the metallic elements of the implant material and at least one corrosion-inhibiting element selected from the group of Al, Zn, Ca, Si, In, Mn, Sc and RE, where RE stands for rare earth metals;(iii) optionally a metal layer of at least one of the corrosion-inhibiting elements selected from the group of Al, Zn, Ca, Si, In, Mn, Sc and RE covering the diffusion layer; and(iv) optionally a passivating layer of metal oxides, metal nitrides or metal fluorides of at least one of the corrosion-inhibiting elements selected from the group of Al, Zn, Ca, Si, In, Mn, Sc and RE covering the diffusion layer or metal layer.
Abstract:
A well servicing composition containing an aqueous phase and an oil phase and an ether carboxylic acid of the formula: RO(CH2CH2O)x(CH2CHR1O)yCH2—COOX wherein, R is a saturated or unsaturated, branched or unbranched alkyl or alkenyl group containing 6 to 22 carbon atoms, x is a number from 1 to 20 and y is 0 or a number from 1 to 20, provided that the sum of x and y is at least 1 and at most 25, R1 is an alkyl group containing 1 to 4 carbon atoms and X comprises at least one member selected from the group consisting of a hydrogen atom, monovalent cations and polyvalent cations.
Abstract:
A cordless telephone system consisting of a fixed station and at least one mobile station, both of which switch over to standby operation after a telephone conversation has been terminated, and correspond with one another at fixed intervals. Each mobile station is registered in the fixed station and can be addressed by the fixed station, and both the fixed and the mobile station each have a receiver circuit and a transmission circuit. The transmission power of the transmission amplifier can be set, at least in the fixed station, as a function of the number of connected mobile stations.
Abstract:
A method of reducing the viscosity of oil-based drilling fluids and well service fluids at low temperatures and a thinner compound for use in such drilling fluids and well service fluids is disclosed. The method comprises adding to said drilling fluids or well service fluids a thinner having the formula: R—(C2H4O)n(C3H6O)m(C4H8O)k-H where R is a saturated or unsaturated, linear or branched alkyl radical having about 8 to about 24 carbon atoms, n is a number ranging from about 1 to about 10, m is a number ranging form about 0 to about 10, and k is a number ranging from about 0 to about 10.
Abstract:
An x-ray marker for medical implants made of a biocorrodible metallic material, the x-ray marker comprises a boride or carbide of the elements tantalum or tungsten.