Additional System Design Considerations

The purpose of security lighting is to deny the criminal the cover of darkness, which he uses to conceal his activities. In addition, strategically designed lighting can considerably increase the security value of other measures, and it can also assist the detection capabilities of surveillance (manned or CCTV) systems. 

Coal burners demand design consideration in all the aspects mentioned under gas and oil burners, but, in addition, need attention to the aspect of ash removal. The extent to which ash removal plays a part in the combustion system design often determines the ability of the burner to burn specific coals, particularly those with a high ash content. Principal types are as follows. 

In addition to the active design principles for reducing the risk of sulfide problems, a number of more passive principles exist. The following design considerations are especially relevant for the reduction of corrosion selection of corrosion-resistant materials and design of a well-ventilated sewer system. 

Typical design considerations include feed water flow rates, water and air temperatures, tower feed and discharge systems (gravity feed or type and location of pumps), and influent contaminant concentrations. In addition, requirements for effluent water contaminant concentrations and restrictions on air emission should be considered according to the various federal and state regulations. 

In addition to thermodynamic considerations, the mechanistic challenge of the formation of the (0-0) group from two water molecules is a vital factor in the design of a realistic model. Systems that include di-fi-oxo bridging between two Mn(III) or —(IV) ions, such as the... 

Equation 42 is included because it has a negative slope—i.e., this set of congeners was selected so that all members had a superoptimal lipophilic character. Evidence now indicates 22, 25-27) that the general relationship one should expect between log 1/C and log P is parabolic. The apex of the parabola has been termed log P0. Molecules having this value of log P have ideal lipophilic character for the system under consideration. Since all of the above equations are linear in log P (the addition of a term in (log P)2 does not improve the correlation), greater activity could have been obtained in each example by designing molecules with better log P values. In all examples except Equation 42 this means increasing the lipophilic character. Equation 42 calls for less lipophilic molecules. 

An additional benefit of fluorination is an increase in hydrophobicity through the effect of the highly polar C-F groups. This means that the level of absorbed water in the polymer at typical ambient humidity is much reduced. Water has a very high relative permittivity, so that its presence can significantly increase the relative permittivity of a material, and the level will also be liable to vary with ambient conditions, bringing uncertainty into design considerations for electronic systems. 

UV germicide mechanisms are introduced. Basic principles of UV disinfection system design, installation, and operation considerations are presented. The concern about UV disinfection by-products is also discussed. In addition, the mechanisms of UV oxidation are addressed. Its applications on organic pollutants decomposing as an emerging water and wastewater treatment technology are discussed. 

PSA systems can also be expanded, but it requires additional design considerations and adds cost in the initial phase of the project. 

Such systems initially compare unfavorably with TTS in that they require a new set of utterances for each application, compared to a TTS system which would just be deployed once and can be used for any application. Furthermore, the canned speech approach can only say a very fixed number of filings, which can limit the scope of the application (for instance it would be very difficult to speak a user s name). Finally, if the application has to be updated in some way and new utterances added, this requires additional recordings which may incur considerable difficulty if say the original speaker is unobtainable. Despite these apparent disadvantages, caimed speech is nearly always deployed in commercial systems in place of TTS. Part of the reason behind this is technical, part cultural. Technically canned speech is perfectly natural and as users show extreme sensitivity to the naturalness of all speech output this factor can outweigh all others. In recent years, TTS systems have improved considerably in terms of naturalness, and so it is more common to find TTS systems in these applications. There are other non-technical reasons caimed speech is seen as a simple, low-tech solution whereas TTS is seen as complex and hi-tech. The upshot is that most system designers feel that they know where they stand with caimed speech, whereas TTS requires some leap of faith. There may be purely business reasons also while the canned speech approach incurs up front cost in an application, it is a one off cost, and does not increase with the size of deployment. TTS systems by contrast can often be sold like normal soft-... 

Compared to control system design, there are special considerations and additional requirements for SIS design including ... 

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