Abstract:
The method is suitable for the manufacture of flat or shaped titanium aluminide articles and layered metal matrix composites such as lightweight plates and sheets for aircraft and automotive applications, thin cross-section vanes and blades, composite electrodes, heat-sinking lightweight electronic substrates, bulletproof structures for vests, partition walls and doors, as well as for sporting goods such as helmets, golf clubs, sole plates, crown plates, etc. The method includes the following steps: (a) forming a porous preform of the reactive powder alloy or a porous multi-layer composite preform consisting of reactive powder metals and alloys by consolidation using at least one method selected from low-temperature loose sintering in vacuum, high-temperature loose sintering in vacuum, low-pressure sintering in an inert gas, cold pressing, direct powder rolling, isostatic or die pressing, and other means of room temperature and warm temperature consolidation, and/or combination thereof, to provide the density not less than 25% from the theoretical density of said reactive alloy; (b) hot consolidating by hot pressing said preform, hot rolling, hot isostatic pressing, or hot extrusion to obtain the density of 98-100% from the theoretical density of said reactive alloy; (c) additional sintering and/or annealing at the temperature being at least 900° C. to decrease the residual porosity, control the microstructure, and improve the mechanical properties, especially ductility and/or plasticity of the resulting metal sheets or layered composites. The hot pressing is carried out at the temperature ranging 950-1700° C., preferably at 1250-1450° C., and at pressure ranging 50-350 kg/cm2. The HIP is carried out at the temperature ranging 1250-1350° C. and at pressure ranging 15000-40000 psi. The layered composite preform is manufactured by individual loose sintering, one layer of the composite at a time, and assembling them in the desired order. The composite consists of layers of titanium and/or titanium hydride, Ti-6Al-4V alloy, α-titanium aluminide alloy, β-titanium aluminide alloy, and γ-titanium aluminide alloy in any combinations.
Abstract:
A telemonitoring central server 12 supports secure data exchange between a number of users, such as a patient, family and friends, medical personnel, suppliers, and the like. A user authenticator 20 authenticates and authorizes a user to the system. Access control is driven by a number of static or dynamic access profiles that are assigned to each user. These profiles dictate the data to which the user is allowed access, the computations available to the user, and the manner in which data is displayed to the user. The presentation style is based on access role, user, age, background, result of previous interactions, information content, authentication level, and the like. Third-party services such as advertisements and discounts for “get well soon” items can also be provided to the user.
Abstract:
Data storage method for storing a subblock of a block of data. The block of data is distributed, in a number of subblocks of data, over a set of devices. The set of devices comprises at least two devices, and the method comprises the steps of: collecting a subblock of data using the device, storing the subblock of data on the device; and storing metadata identifying the data comprised in the subblock of data.
Abstract:
This invention provides a communication system for monitoring the health status of a patient, a communication device and a sensor device for monitoring the health status of a patient and a method of monitoring the health status of a patient. The communication system comprises a communication device and a sensor device, the communication device comprising a first communication interface for communication with the sensor device and comprising a second communication interface for communication with a health care center, the communication device being able to generate a warning message upon failure of either the first communication interface or the second communication interface, wherein —the generation of a warning message is prevented if the failure of the first communication interface begins and ends during a first time interval and/or —the generation of a warning message is prevented if the failure of the second communication interface begins and ends during a third time interval and/or —the communication device comprises a detection device for detecting a critical or non-critical health status, and the generation of a warning message is prevented if both —the duration of failure of the second communication interface is —shorter than a second time interval and —a non-critical health status is detected.
Abstract:
The present invention relates to an X-ray examination apparatus and a corresponding method for acquiring X-ray image data of a region of interest by use of an imaging unit (1-3) comprising an X-ray source (2) for emitting X-ray radiation and an X-ray detector (3) for detecting X-ray radiation after penetration of said region of interest. In order to provide a quick and easy method which also reduces the X-ray dose to which a patient is exposed and which allows immediate acquisition of X-ray image data from a desired and possibly optimal position, it is proposed that the X-ray examination apparatus according to the invention comprises further: processing means (22) for determining a desired position of said imaging unit (1-3), at which X-ray image data shall be acquired, based on a predetermined image acquisition plan (P) and/or an actual position (D) of an instrument (11), control means (23) for determining position parameters of said imaging unit (1-3) for said desired position, and positioning means (30) for positioning said imaging unit (1-3) at said desired position by use of said position parameters.
Abstract:
Sputter target assemblies (10) and methods of making the sputter target assemblies in which the HIP processes conventionally used are minimized, or eliminated, while producing higher yields of sputter target assemblies in less time. In one instance the sputter target assemblies include a single, or multiple, layered interlayer (14, 16) between the target and backing plate (18) in order to achieve intermetallic diffusion bonds between adjacent layers during a single HIP process. A mechanical interlock between the target (12) and backing plate is also achieved preferably during a single HIP process. In another instance, the target and backing plate are welded directly together by electron beam welding, and the interlayer and HIP process are omitted. In either case, the process for making the sputter target assembly is shortened, rendering it less expensive and subject to less failures, while achieving assemblies having robust strength.
Abstract:
Lightweight metal matrix composites containing a skeleton structure of titanium, titanium aluminide, or Ti-based alloy are manufactured by low temperature infiltration with molten Mg-based alloy or Mg—Al alloy at 450-750° C., with molten In, Pb, or Sn at 300-450° C., or with molten Ag and Cu at 900-1100° C. The skeleton structure with a density of 25-35% is produced by loose sintering of Ti or Ti-based alloy powders. A primary deformation of the Ti skeleton structure before the infiltration is carried out by cold or hot rolling or forging to obtain a porous flat or shaped preform with a porosity
Abstract:
Data storage method for storing a subblock of a block of data. The block of data is distributed, in a number of subblocks of data, over a set of devices. The set of devices comprises at least two devices, and the method comprises the steps of: collecting a subblock of data using the device, storing the subblock of data on the device; and storing metadata identifying the data comprised in the subblock of data.
Abstract:
A communication system for monitoring the health status of a patient includes a communication device and a sensor device, the communication device comprising a first communication interface for communication with the sensor device and comprising a second communication interface for communication with a health care center, the communication device being able to generate a warning message upon failure of either the first communication interface or the second communication interface, wherein the generation of a warning message is prevented if the failure of the first communication interface begins and ends during a first time interval and/or the generation of a warning message is prevented if the failure of the second communication interface begins and ends during a third time interval and/or the communication device comprises a detection device for detecting a critical or non-critical health status, and the generation of a warning message is prevented if both the duration of failure of the second communication interface is shorter than a second time interval and a non-critical health status is detected.
Abstract:
A target (1) and backing plate (10) assembly and method of making the same. The target (1) and backing plate (10) assembly provides a mechanical interlock between the target (1) and backing plate (10) in addition to diffusion bonding between dissimilar materials comprising the target (1) and backing plate (10). An interlayer may also be used between the target (1) and backing plate (10). A plurality of ridges, or other salient surface features (3,4) on one of the target (1) and backing plate (10) are joined to corresponding members or channels (13, 14) on the other of the target and backing plate. The dissimilar materials of the target (1) and backing plate (10) fill negative angled cavities (13, 14) formed by the plurality of ridges (3, 4) and corresponding channels or members (13, 14) of the target (1) and backing plate (10) to accommodate the diffusion bonded dissimilar materials. A target (1) and backing plate (10) assembly with increased strength results.