Catenary

A variety of specialized idlers are available. Examples are plastic disk catenary idlers for handling wet corrosive materials two roU idlers, where the roUs are oriented in a vee for lighter duty conveying system and suspended idler supports for severe service. In this last type, three to five idler roUs are linked end-to-end and suspended from conveyor frame stringers to form a catemary that cradles the belt. 

Catenary (the curve formed by a cord of uniform weight suspended freely between two points A, B Fig. 3-8)... 

Two trains coming from opposite directions approached the area where the cloud was present. Each consisted of an electrically powered locomotive and 19 coaches constructed of metal and wood. The turbulence of the trains probably mixed up the vapor and mist with overlying air to form a flammable cloud portion. Either train could have ignited the cloud, most likely at catenary wires which powered the locomotives. 

A spectacular application of the acyloin ester condensation was the preparation of catenaries like 11. These were prepared by a statistical synthesis which means that an acyloin reaction of the diester 10 has been carried out in the presence of an excess of a large ring compound such as 9, with the hope that some diester molecules would be threaded through a ring, and would then undergo ring closure to give the catena compound ... 

Ketten-glied. n. link (or member) of a chain, -isomerie, /. chain isomerism, -kokken, m.pl. streptococci, -linie,/. catenary (curve), -moldktil, n. chain molecule, linear molecule, -polymer, n. chain polymer, linear polymer, -rad, n. sprocket wheel, -reaktion, /. chain reaction, -trieb, m. chain drive. 

When powered by an electric motor, generally taking power from overhead wires ( catenaries ) such a vehicle is called an electric trolleybus or a trackless trolley. An electric bus taking power from current in the ground has been developed by Ansaldo-Breda. Battciy-powcrcd buses also have been developed, although all of these have been smaller than stan-... 

A = Four crown to ground guys. Minimum guyiine size recommended as 5/8 unless otherwise specified by mast manufacturer. Tensioning may be judged by catenary (sag). 6 catenary (approximately 1,000 lb tension) recommended on initial tensioning. 

Proper chain tension is obtained by adjusting the sag (catenary) in the unloaded span. For most horizontal and inclined drives, the chain should be installed with a depth of sag amounting to approximately 2 per cent of the sprocket centers (Table 58.9). 

Rail continuity bonds and negative feeders should be regularly inspected and tested, and the insulation to earth of the third rail or overhead catenary wires and the running (return) rails maintained satisfactorily. Track maintenance should include the renewal of sleepers and rail bedding material if necessary. 

Catastrophic corrosion damage to buried structures may occasionally occur as a result of earth leakage faults on d.c. equipment or on traction systems using metallic posts to support overhead catenary wires. Care should be taken when making earth potential measurements because of the high potential gradients that may be present. 

Fig. 39.7. (a) Two-compartment catenary model for extravascular (oral or parenteral) administration of a single dose D which is completely absorbed. The transfer constant of absorption is (b) Time courses of the amount in the extravascular compartment Xa, the concentration in the plasma compartment Cp and the content in the elimination pool X. ... 

The synthetic data have been computed from a theoretical two-compartment catenary model with the following parameters ... 

Two-compartment catenary model for extravascular administration with incomplete absorption... 

In the catenary model of Fig. 39.14a we have a reservoir, absorption and plasma compartments and an elimination pool. The time-dependent contents in these compartments are labelled X, X, and X, respectively. Such a model can be transformed in the 5-domain in the form of a diagram in which each node represents a compartment, and where each connecting block contains the transfer function of the passage from one node to another. As shown in Fig. 39.14b, the... 

Fig. 39.14. (a) Catenary compartmental model representing a reservoir (r), absorption (a) and plasma (p) compartments and the elimination (e) pool. The contents X, Xa, Xp and X,. are functions of time t. (b) The same catenary model is represented in the form of a flow diagram using the Laplace transforms Xr, Xa and Xp in the j-domain. The nodes of the flow diagram represent the compartments, the boxes contain the transfer functions between compartments [1 ]. (c) Flow diagram of the lumped system consisting of the reservoir (r), and the absorption (a) and plasma (p) compartments. The lumped transfer function is the product of all the transfer functions in the individual links. 

The term rotamne derives (G. Schill, Histoiy , In Catenaries, Rotaxanes, and Knots, Academic, New York, 1971, pp. 1-4) from the Latin words rota, meaning wheel, and axis, meaning axle. In these molecular compounds, several wheel and axle components are constrained to be bound to one another mechanically, Le., without the aid of any valence forces, since the axle(s) is/are endowed with bulky stopper groups that prevent the extrusion of the wheel(s). 

Molecular Catenaries, Rotaxanes and Knots (Eds. J.-P. Sauv-age, C.O. Dietrich-Buckecher), VCH-Wiley, Weinheim, 1999. 

One of several general models for metabolite compart-mentation in which a central compartment is directly linked to or feeds from (hence the name) other compartments that do not communicate with each other aside from their connection to the central pool. See Catenary Model Compartmental Analysis... 

COMMITMENT-TO-CATALYSIS RAPID EQUILIBRIUM ASSUMPTION KINETIC ISOTOPE EFFECT ISOTOPE TRAPPING COMPARTMENTAL ANALYSIS CATENARY MODEL... 

MALTOSE 1-EPIMERASE MALTOSE PHOSPHORYLASE MALTOSE PHOSPHORYLA.se MALYL-CoA LYASE MAMILLARY MODEL CATENARY MODEL COMPARTMENTAL ANALYSIS Mandelate,... 

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