Maintenance factor

The problem could be maintenance, operation, or design, or a combination of any or all these factors. In all honesty, you should never. see this set of evidence marks because it indicates a lack of control. Now because the mechanic cannot control operational problems or design problems, the first phase to correct this situation is to control the mechanical maintenance factors, like alignment, proper bolting and torque. sequences, be sure shafts are straight and round, and dynamically balance all rotary components. Reinstall the pump and wait for the next failure. Once the maintenance factors are under control, there should appear a clear vision and path to resolve any operational and/or design weaknesses. 

The cost of equipment determines the capital investment for a process operation. However, there is no direct relationship to profits. That is, more expensive equipment may mean better quality, more durability and, hence, longer service and maintenance factors. These characteristics can produce higher operating efficiencies, fewer consumption coefficients and operational expenses and, thus, fewer net production costs. The net cost of production characterizes the perfection rate of the total technological process and reflects the influences of design indices. Therefore, it is possible to compare different pieces of equipment when they are used in the manufacture of these same products. 

Taking the hardware analogy further, PIFs can be seen as corresponding to the design, operational, and maintenance factors which affect the reliability of hardware equipment. The reliability of a pump, for instance, will be influenced by a number of factors such as ... 

The coefficient of utilization is determined by the amount of light reflected by the reflectors.41 If more detailed information is lacking, this may be assumed42 to be 0.6. The maintenance factor makes a correction for the normal operating condition of the lamps and the reflector.41 It takes into account the age of the lamp and how dirty the reflector and lamp are. Since this is constantly changing, it is hard to estimate. A reasonable value to use42 is 0.70. 

The lighting specifications are given in Table 8-7. A coefficient of utilization of 0.60 and a maintenance factor of 0.70 have been assumed. Fluorescent lighting is to be used. The power requirements are calculated below. 

Peptides are not the only fungal hormones. The water mold Blastocladiella releases a zoospore maintenance factor, a cyclic phosphate derivative of 5 -phosphoribosyl-5-aminoimidazolecarboxamide.329 It is similar to the succinocarboxamide, which is an... 

In (7.184) the first term on the right-hand side accounts for the growth rate and the second term accounts for the maintenance. Here the growth term and the maintenance factor are used in their classical definitions. 

The second category includes mesenchymal cells, such as fibroblasts (BALB/c 3T3, Swiss 3T3), adipocytes, endothelial cells, smooth thin muscle cells, and neuroectodermic cells (such as glia cells). Most of these cells need maintenance factors. Some cells, such as the NIH-3T3, can grow in a serum-free medium containing minimal medium supplemented with transferrin (25 pg/ml), insulin (10 pg/ml), EGF (100 ng/ml), bFGF (100 ng/ml), and PDGF (0.5 U/ml). 

The cells from the third category, such as epithelial cells isolated from mammal glands, testes, ovaries, pituitary gland, prostate, and from ocular tissue, generally proliferate with more difficulty in a defined medium. Besides maintenance factors, these cells may also need proteins from the ECM to promote their adhesion. Those proteins can be collagen, fibronec-tin, or laminin. Non-peptide factors, such as retinol (50 ng/ml) and corticosteroids (10-100 ng/ml), may also be necessary. 

The most important maintenance factor for the UV reactor performance is the cleanliness of the surfaces through which radiation must pass. Surface fouling can result in inadequate performance, so a strict maintenance schedule is recommended. 

Here rs is the rate of substrate uptake by the cells (kg substrate/m s). Yx/s (kg/kg) is the stoichiometric factor or yield coefficient, relating the mass of cell produced per unit mass of substrate consumed and the maintenance factor m (kg substrate/kg biomass s), represents the utilisation of substrate by the cells for non-growth related functions. 

Aurelio, O., T. Boulin, and O. Hubert. 2003. Identification of spatial and temporal cues that regulate postembryonic expression of axon maintenance factors in the C. elegans ventral nerve cord. Development 130 599-610. 

Apart from being a maintenance factor for cultured neurons, FGF-2 is also a mitogen for certain populations of neuronal precursors. Proliferation in response to FGF treatment has been observed in cultures of neuronal progenitors isolated from the cerebral hemispheres (Gensburger et al.,... 

ASTM F401 (1974) Standard method of test for yield and maintenance factors for gaskets , ASTM. USNRC RG 1.73 (January 1974) Qualification tests of electric valve operators installed inside the containment of nuclear power plants . 

Empirical constant (m /kg h) ms Maintenance factor based on substrate (kg/kg-h) mp Maintenance factor based on product (kg/kg-h)... 

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