Ribs typical

Glue was also used to join the numerous small plywood and wood details necessary to fabricate the structural frameworks typical of early aircraft. Fig. 1 shows a monoplane wing circa 1930 fabricated primarily from wood that was joined via more than one thousand glued joints [2]. Note the many small stringers and gussets bonded together to form the ribs and spars of the wing. 

Plate valves are typically used for high speed separable compressors. Plate valves are similar to ring valves with the rings connected by ribs. Instead of individual elements opening and closing, all valve ports o[)en and close at the same time. 

Ribbed helices (costal helices) are important in organic chemistry because linear polymers contain side chains as well as backbones. We may, then, discern not only the catenal helix of the backbone, but the intercostal helix formed by all of the ribs and the infracostal helicesof the individual side chains. The intercostal helix may be iterative (as in an isotactic head-to-tail vinyl polymer or homogeneous poly-a-amino acid) or non-iterative (as in a random copolymer, an atactic polymer or typical protein). The intracostal helices can best be analyzed as short-chain crooked lines, as in Section III. Important as costal helicity is, it is secondary to catenal helicity and we therefore limit our attention to the primary helicity, that of long chains. Indeed, we limit our attention to catenal helices having chain motifs of two atoms and two bonds as found in head-to-tail vinyl homopolymers ... 

The sunflower budworm or bud moth (Suleima helianthana Riley), considered a minor pest of the sunflower in which damage is sporadic, also feeds on the Jerusalem artichoke (Pedraza-Martinez, 1990 Rogers, 1979). In North America, the insect is found from Maryland to California and south to Mexico. Damage is caused by larval feeding, typically on the apical bud or axils of upper leaves, producing distorted, misshapen plants. Young larvae act as leaf miners or enter a leaf rib, while older larvae enter and feed on buds, leaf axils, stems, and bracts. 

Gas-assisted injection molding is a technique used to hollow out thick sections, such as structural ribs, common in many injection molded parts. In a typical gas-assist application, a short shot of polymer is first injected into the cavity. Then a shot of gas immediately follows the polymer, pushing the melt into the unfilled regions of the... 

As the cell walls are squeezed into polyhedra, a wall-thinning effect takes place, and liquid is drained from cell-wall faces into the lines of cell intersections to form ribs or struts, which are typically triangular in cross-section. This cell wall membrane thinning can continue to the point where the cell walls collapse and the cells open. This becomes a very important characteristic of most plastic foams, and affects properties such as thermal conductivity, moisture absorption, breathability, and load bearing. 

Adequate calcium nutrition during childhood and adolescence is thought to bean important deterrent to osteoporosis in later life. A one-year study of 149 girls (8 years old) revealed the effects of consuming a typical diet (900 mg Ca/day) or a diet supplemented with an additional 850 mg Ca/day Bonjour el al, 1997). The Ca supplement was supplied by specially prepared biscuits, juices, and candy bars (rather thar pills) to assure compliance. To view some of the data, the density at the femoral diaphysis increased by 5% (unsupplemented) and by 6% (plus calcium) during the 1-ycar period. The density at the lumbar spine increased by 4% (unsupplemented) and by 4% (plus calcium). The data dernonstrated a dear and definite increase in bone density at some sites, but not at others. This study, as well as others Johnston et al., 1992), tend to show that caicium supplements to children can benefit bones of the appendicular skeleton, but not the axial skeleton. The appendicular skeleton includes the pelvis, arm bones, and leg bones. The axial skeleton includes the skull, vertebra, ribs, and sternum. 

A noise-abatement element was composed of a structural part and a non-structural waffle. The structural part was constituted of a ribbed composite panel. A typical ribbed panel had a dimension of 3000x620 mm in the thickness direction, the panels were longitudinally subdivided into three rectangular panels the border of which were stiffened with rubber ribs in intervals of about 900 mm the thickness of panels between the rubber stiffeners amounted to 40 mm the thickness of ribs was about 80 mm. 

Strain and stress in a specimen are largely defined by the three dimensions of the specimen, by location of the load application, and by the specimen s profile, that is, a confignration of its cross section. Solid composite deck boards are typically represented by jnst one, flat, rectangnlar section. Hollow boards, having ribs, can be... 

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