Permitted development

Poor performance can result from fan inlet eccentric or spinning dow, and discharge ductwork that does not permit development of hiU fan pressure. Sometimes inlet restrictions starve a fan and limit performance. To obtain rated performance, the air must enter the fan uniformly over the inlet area without rotation or unusual turbulence. This allows all portions of the fan wheel to do equal work. If more air is distributed to one side of the wheel, such as with an elbow on the inlet, the work performed by the lightiy loaded portions of the wheel is reduced and capacity is decreased by 5—10%. The use of an inlet box duct on a fan can reduce capacity by as much as 25% unless there are turning vanes in the duct. Use of the vanes reduces the capacity loss to around 5%. 

The production of acetic acid from butane is a complex process. Nonetheless, sufficient information on product sequences and rates has been obtained to permit development of a mathematical model of the system. The relationships of the intermediates throw significant light on LPO mechanisms in general (22). Surprisingly, ca 25% of the carbon in the consumed butane is converted to ethanol in the first reaction step. Most of the ethanol is consumed by subsequent reaction. 

What is needed is an alternative approach which permits development of valid cause and effect relationships. This strategy, one involving intensive surveys, is referred to here as mechanistic. The Willamette River, Oregon, USA, is used as a case study to illustrate quantitative, semi-quantitative and qualitative approaches to mechanistic assessment of river water quality using, respectively, dissolved oxygen depletion, erosion/deposition and potentially toxic trace elements as examples. 

Cellular automata (CA) using the transition rules given in Example 2, but without special steps being taken at the boundaries to permit development of the pattern to continue. 

A patterned array of goethite can be deposited from an Fe(N03)3 solution at 70 °C on an organic substrate mounted on a silicon wafer (Rieke et al., 1994). The organic surface contains a mixture of sulphonate groups (which bind the iron oxide) and nonbinding methyl groups (which permit development of a pattern). 

Calculations for a branched advancement synthesis are defined to permit development of well-characterized functionality in the product molecules. In this study, the difunctional epoxy resin monomer used is the diglycidyl ether of bisphenol A, Epon 828, and the multifunctional epoxy phenol novolac resin used is DEN 438. Let ... 

Finally, we can comment on the influence of the reactor type on the films that can be deposited. Evidently, the hot-wall reactor tends to deposit very Ta-rich films. Although it may be possible to alter the stoichiometry in this type of reactor, the choices are limited. One must operate under conditions where uniform depositions are achieved both on each wafer and from wafer to wafer, because this is a batch system. In the cold-wall reactor, it was possible to obtain the proper stoichiometry at high deposition rates. Since the higher deposition rates permit development of a single-wafer reactor, there are more choices in the process conditions to be used. 

To prevent shock and permit development of new species at each level, if such were involved, pH levels were automatically assumed at 0.2 pH unit, and after a drop the controlled units were equilibrated for one to two weeks. If the units responded successfully, the next incremental drop was programmed. Results for one year are compressed into Figures 13 and 14. The digestion units were finally operated successfully at pH 4.6 without making any change in the environment, except as noted above. There was no failure, and no stuck digester developed. In the same way these units were brought back to full gas productivity at pH 7.0. 

It is acknowledged that for many substances there are few data to serve as a basis for development of CSAFs. Indeed, currently, relevant data for consideration are often restricted to the component of uncertainty related to interspecies differences in toxicokinetics. While there are commonly fewer appropriate, relevant data at the present time to address the three other components considered here, namely interspecies (animal to human) differences in toxico-dynamics, interindividual (human) variability in toxicokinetics, and interindividual (human) variability in toxicodynamics, it is anticipated that the availability of such information will increase with a better common understanding of its appropriate nature. Application of the approach even in the absence of data is considered to be informative, therefore, since it focuses attention on gaps in the available information that, if filled, would permit development of more appropriate measures of dose/concentration-response. 

Rules of thumb often apply to features of equipment that are arbitrary, or whose improvement is likely to result in only maiginal economic benefit. Rules of thumb may afford a possible course of action when circumstances do not permit development of the best course. 

What are the major advantages and disadvantages of fusion as a potential energy source compared with fission What is the major technological problem that must be solved to permit development of a fusion reactor ... 

They stressed that the availability of fused silica capillary columns coated with cross-linked non-polar liquid phases permitted development of this technique. Such columns resist the deterioration which was previously encountered with aqueous samples. These authors applied this technique to several citrus essences as well as to fruit essences such as grape, apple and strawberry. 

The Activated Sludge Advisor Prototype (ASAP) was designed to help the Dallas Central Wastewater Plant s novice operators control the activated sludge process. Our ultimate goal is to develop an expert system which deals with all aspects of plant functioning. The activated sludge process was chosen as the focus of our initial effort because (a) it is crucial to treatment plant functioning, (b) it entails a considerable amount of expertise, and (c) its circumscribed nature would permit development of an expert system within a reasonable time frame. 

Some of the parameters influencing the tumoritropic behaviour of soluble macromolecules have now been elucidated, permitting development of more sophisticated approaches using biodegradable carriers and linkages carefully designed for selective cleavage by tumour-associated enzymes. 

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