Device Components

The acoustical device component is placed in water and is configured like a conventional impulse echo equipment. The ultrasound wave passed the delay path and enters the specimen container through a very thin plastic window. The backside of the container is a steel plate and will also be used as a reference reflector to measure pn. 

Since will be too low (< 5 ms for a 50 Hz system) 1. will be much less than 7% of 1 in all situations. To assign a short-time rating to the protected devices and components in such cases is therefore of little relevance. As noted above, current is the cause of heat, for which is assigned the thermal duty of a current-carrying device, component or part. Also note the following ... 

Figure 13.29 A power distribution scheme illustrating the procedure to assign fault level to a device, component or a bus system...

Figure 13.29 illustrates a typical power distribution scheme to assign ratings to the various devices, components and busbar systems,... 

Refer to Figures 15.8 and 15.9. These transformers are quite different from a measuring or a protection transformer, particularly in terms of accuracy and short-time VA ratings. They are installed to feed power to the control or the auxiliary devices/components of a... 

Another problem in the construction of tlrese devices, is that materials which do not play a direct part in the operation of the microchip must be introduced to ensure electrical contact between the elecuonic components, and to reduce the possibility of chemical interactions between the device components. The introduction of such materials usually requires an annealing phase in the construction of die device at a temperature as high as 600 K. As a result it is also most probable, especially in the case of the aluminium-silicon interface, that thin films of oxide exist between the various deposited films. Such a layer will act as a banier to inter-diffusion between the layers, and the transport of atoms from one layer to the next will be less than would be indicated by the chemical potential driving force. At pinholes in the AI2O3 layer, aluminium metal can reduce SiOa at isolated spots, and form the pits into the silicon which were observed in early devices. The introduction of a tlrin layer of platinum silicide between the silicon and aluminium layers reduces the pit formation. However, aluminium has a strong affinity for platinum, and so a layer of clrromium is placed between the silicide and aluminium to reduce the invasive interaction of aluminium. 

A breath test, used to determine the presence of Helicobacter pylori, associated with stomach ulcers, is an example of a diagnostic product involving separate drug and device components. To perform the test, a patient swallows some isotopically (e.g. 

Sec. 820.60 Identification - Identify components at all stages in the production process Sec. 820.65 Traceability - Use lot numbers for fraceabilify of devices /components for surgical... 

BS6929 Respiratory protective devices (component nomenclature). 

In terms of photoelectrode material quality, single crystals comprise a rational choice since their bulk properties can be controlled better and their influence on cell performance may be evaluated in a rather accurate manner, as being microstruc-turally well-defined solids. However, the cost and convenience of single-crystal preparation are not suited to the practical requirement of cheap device components. Polycrystalline photoelectrodes are advantageous in terms of fabrication cost, ability to prepare large areas in one operation, and material economy. 

The system modelled was described by Nguyen et al. (2). The parameters for the model are taken from independently conducted experiments (2-6). Computer simulations were conducted with the model to mimic the conditions of the experimental situation. The simulation results are presented for a disc device whose dimensions are given in Table I. The molecular weight of each monomeric unit of the polymer is about 350 with two sites of hydrolysis. The concentration of device components and the dimensionless property ratios corresponding to each disc are given in Table n. 

Drug incorporating a device component with the combination product having the primary intended purpose of fulfilling a drug function. 

A new trend in the delivery of medicines is to employ a device component. This may be an implantable pump for insulin, a metallic stent coated with a drug, or unit capable of rapidly vaporizing a discrete dose for inhalation. Such products are regulated by the FDA as "combination" products and may be reviewed by multiple Centers within the Agency, which may require additional levels of documentation to support the product design. 

Flexoelectricity involves two degrees of freedom of the BLM electrical and mechanical. The system is amenable to simultaneous electrical and optical investigation of mechanical-to-electrical-energy conversion mediated by a bi-molecularly thin membrane. BLMs themselves are unlikely to be used as device components. They offer, however, an eminently suitable means for conducting the fundamental studies which are necessary for the full potential of the membrane-mimetic approach to advanced materials to be realized. 

This work attempts to model a semiconductor/molten salt electrolyte interphase, in the absence of illumination, in terms of its basic circuit elements. Measurement of the equivalent electrical properties has been achieved using a newly developed technique of automated admittance measurements and some progress has been made toward identification of the frequency dependent device components (1 ). The system chosen for studying the semiconductor/ molten salt interphase has the configuration n-GaAs/AlCl3 1-... 

If the device component of the biologic/device combination product has already been cleared or approved as a stand-alone product, some aspects of device functionality will be known. However, the effect of the biologic will need to be investigated. In the case where the device and biologic are physically associated with each other, the process used to join the two components can affect device performance in a variety of ways. Easily determined parameters such as dimensions and clearances must be confirmed. More subtle issues arise when physical performance and durability are assessed. Additional manufacturing procedures associated with the antibody coating could, at least in theory, alter the properties of the entire device. In some cases, test methods that have been successfully employed for stand-alone devices may need to be modified to accurately assess all relevant parameters that must be considered for the combination product. 

Stdckel, D. The Shape Memory Effect Phenomenon, Alloys, and Applications, Nitinol Devices Components, Inc., Freemont, CA, 2000. 

J. W. Faust, Jr., Am. Soc. Testing Materials, Symposium on Cleaning of Electronic Device Components and Materials, Special Tech. Publ. 246. 

Jess J, Reis R, editors. Design of System on a Chip Devices Components. Springer 2004. p 255. 

Leachables in orally inhaled and nasal drug products (OINDP) are compounds which are present in the drug product due to leaching from container closure system components. Extractables are compounds that can be extracted from OINDP device components, or surfaces of the OINDP container closure system when in presence of an appropriate solvent(s) and/or condition(s). Leachables are often a subset of, or are derived directly or indirectly from, extractables. Extractables may, therefore, be considered as potential leachables in OINDPs. Some leachables may affect product quality and/or present potential safety risks, therefore regulatory guidance has provided some recommendations regarding the analysis and toxicological safety assessment (i.e., qualification) of such compounds. 

Used to test or calibrate a critical device/component... 

---