Siemens Aktiengesellschaft

Horst Schreiner

Bernhard Rothkegel

Heinrich Hassler

Markus Schmidt

Gudrun Zahlmann

Rainer Alfred Kuth

Klaus Abraham-Fuchs

Siegfried Schneider

Eva Rumpel

Norbert Rahn

Horst Kippenberg

Ernst Geldner

Ali-Nejat Bengi

Sjouke Zijlstra

Reinhard Tusche

Dieter Friedrich

Bernard Rothkegel

Rudolf Scherbaum

A method is proposed for determining clinical study compliance. The method includes obtaining criteria for the clinical study and accessing stored clinical data relating to the clinical study. Thereafter, the criteria and clinical data are correlated to determine a measure of compliance with the criteria of the clinical study.

Method and system for measuring quality of performance and/or compliance with protocol of a clinical study

In a method for admitting an information provider to transmit information, a transmission device receives test data transmitted by an information provider, and the transmission device evaluates the quality of the test data. The test data represents information offered by the information provider. Depending on the quality of the test data, the transmission device admits the information provider to a system for transmitting information between information providers and information seekers. The transmission device then matches one or more information seekers with the information provider.

Method for admitting an information provider to a data transmission process, and transmission device

A method is provided for configuring medical devices such as medical devices used in a clinical trial. Based on the needs of the clinical trial, a definition of a configuration of the medical devices to be used in the clinical trial is generated and the configuration data is transformed into a profile. The profile is distributed to sites at which the clinical trial will be conducted and the profile is applied to the medical devices at the sites to configure the medical devices. The medical devices are thereby capable of producing data that is comparable as between the sites used in the clinical trial.

Method for distribution of configuration settings for medical devices

In a method for determining row correction values for a digital image converter, with image points arranged in a matrix in rows and columns, in which a small part is protected against radiation by a covering, in order to form a dark reference zone, row correction values are formed by determining the differences of the image points in the dark reference zone in relation to their environment with defective pixels in the dark reference zone being determined and are suppressed in the determination of the row correction value.

Method for determining row correction values for a digital image converter

In a method for the operation of a digital imaging system of an X-ray diagnostic apparatus having an X-ray unit for the generation of X-ray images, an X-ray image converter-television chain for the acquisition of the X-ray images, the chain including a digital image converter having image points arranged in matrix form in rows and columns and a monitor for the reproduction of the X-ray images processed by the digital imaging system. Defective image points are recognized by converting at least one calibration image into a filter image by highpass filtering, e.g. a median filtering, and the filter image is subjected to defect determination, so that a defect image is obtained. The defect image is used for the correction of an original image.

Method for the operation of a digital imaging system of an X-ray

Electrical contact materials based on AgCdO with CdO as the main active component have proven to be particularly advantageous for low voltage switchgear in the power industry. However, when switching AgCdO contact materials, CdO, which is classified as toxic, can escape into the environment through burn-off. It is important, therefore, to keep the CdO content as low as possible in the contact material, or to exclude it completely. The contact material according to the invention is a sintered contact material consisting of AgSnO.sub.2 with at least two other metal oxide additives; namely, Bi.sub.2 O.sub.3, CuO and optionally CdO. Relative to SnO.sub.2, these additives Bi.sub.2 O.sub.3, CuO optionally CdO, amount quantitatively to a total maximum of 25 percent by volume of the total amount of oxide.

Sintered, electrical contact material for low voltage power switching

The composite according to the invention is prepared by milling an atomized silver, two metal oxide alloy powder dry or wet in a mill in order to reduce its particle size and deform its particle shape. Subsequently an internal oxidation of the powder is carried out in two stages, at a first temperature range between 673.degree. K. and 773.degree. K. for two to six hours and in a second temperature range between 873.degree. K. and 1073.degree. K. for 0.5 to 2 hours. The internally oxidized powder is pressed into molded parts and these are densified by sintering in a temperature range between 973.degree. K. and 1173.degree. K. in air or a neutral atmosphere and by coining.

Cadmium-free silver and metal oxide composite useful for electrical

AgCdO based contact elements are replaced in contactors and small circuit breakers with CdO-less type elements which exhibit little burn-off in the arc, a low welding force and minimal heating when carrying continuous current. However, known AgSnO.sub.2 contact materials do not have optimum values in all operationally important properties. In these contact materials a more firmly adhering oxide layer occurs as compared with AgCdO. The invention relates to a sintered compound material for electrical contacts, consisting of AgSnO.sub.2 Bi.sub.2 O.sub.3 CuO and containing at least one other metal oxide additive which sublimes below the melting temperature of silver. The SnO.sub.2, Bi.sub.2 O.sub.3 and CuO are globularly precipitated in silver material structure zones having a maximum diameter of 200 .mu.m, and the metal oxide additive is distributed on the surfaces of the boundary regions of these microscopic silver zones.

Sintered compound material for electrical contacts and method for its

In a method for molding formed parts in automatic multiposition presses, using powdered materials having a flowability characterized by a flow time exceeding 60 seconds per 100 g of powder flowing from a 60.degree. standard funnel with a nozzle aperture of 4 mm and a nozzle length of 4 mm, the powdered material having in the mold a filling height to diameter ratio larger than two, the powder is conveyed into the mold by means of filling devices located at a plurality of separate charging stations, pressed at a separate pressing station and ejected at yet another separate station. The filling heights in each mold is subdivided into at least two individual filling heights so that the filling of the mold to these individual filling heights can be carried out at different charging stations.

Method for the dry molding of formed parts

In the manufacture of molded single layer bodies in an automatic press, the press output is substantially increased by providing, on a circular table, at least two work positions at a predetermined distance from each other. At each work position, a pressing process for pressing the powder and an ejecting process for ejecting the finished molded body take place. Filling devices are arranged between the work positions in such a manner that the filling vessel of each filling device covers a wide angular range of the circular table. Pressing and ejecting take place during standstill of the press table, and the filling of the die takes place during the transport of the press table from the one to the other work position.

Automatic press

A relay contact made of nickel-cobalt sintered alloys with the composition 50 to 85% nickel and 50 to 15% cobalt is described.

Use of nickel-cobalt sintered materials for electric relay contacts

A sintered contact material of silver and at least two embedded metal oxides for use in electrical contacts in which the metal oxides are distributed alternatingly in the silver in different microscopic zones of the sintered contact material.

Sintered contact material of silver and embedded metal oxides

In order to generate a graphite free, solderable surface on a contact piece for electric contacts, which consists of silver with graphite particles up to about 5% by weight finely and uniformly distributed therein, the contact piece is subjected to a wet scouring treatment, simultanouesly using scouring stones.

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Nuremberg, Germany

Horst Schreiner