Centre heads

Mid cut centre head fully foward, front head pressure released and rear head pressure being increased to move rear head towards line bar... 

The combination set consists of a graduated hardened steel rule on which any of three separate heads - protractor, square or centre head -can be mounted. The rule has a slot in which each head slides and can be locked at any position along its length. 

Scribe line on the end face through the centre of the shaft using the centre head of a combination set (see Fig. 3.18). 

In particular, the known stress calibration method was chosen, therefore 6 rosetta strain gauges (R1-R6) on the shell and 7 (R7-R13) on the the head were applied. Their distances measured from the head centre are listed in table 1. R3 and R4 were applied only to check a uniform stress level on the shell surface. 

Rosetta Strain Gauge Distance from the head centre fmm ... 

A comparison of the results achieved with the FEM Analysis and the rosetta strain gauge measurements is shown in fig. 19. Differences can be noted in areas labeled B and C. The former can be explained as an effect of the discrepancy between the actual shape of the vessel and the ideal one used in the F.E.M. model. The latter can be ascribed to the presence of a muff, located in the centre of the head of the actual vessel, which has not been taken into account in the model. 

Figure B3.6.4. Illustration of tliree structured phases in a mixture of amphiphile and water, (a) Lamellar phase the hydrophilic heads shield the hydrophobic tails from the water by fonning a bilayer. The amphiphilic heads of different bilayers face each other and are separated by a thin water layer, (b) Hexagonal phase tlie amphiphiles assemble into a rod-like structure where the tails are shielded in the interior from the water and the heads are on the outside. The rods arrange on a hexagonal lattice, (c) Cubic phase amphiphilic micelles with a hydrophobic centre order on a BCC lattice.

Figure 1.6 shows the implant for a replacement hip joint. In the operation, the head of the femur is cut off and the soft marrow is taken out to make a hole down the centre of the bone. Into the hole is glued a long metal shank which carries the artificial head. 

An alternative valve design uses a conical discharge valve in the centre of the cylinder head, with a ring plate suction valve surrounding it. This construction is used in compressor bores up to 75 mm. 

Black mane lions were observed to head rub and spray MF in a lion breeding centre, Transvaal (Northern Province), South Africa. A black maned lion, a lioness at the onset of oestrous (only when she sprays MF) and subadult cubs were all observed... 

At UCLA, Deborah Estrin is heading up the Centre for Embedded Networked Sensors or CENs, a 40 million, 10-year NSF-backed centre... 

Figure 1 (Plate 1). A molecular view of a small section of a flat lipid bilayer generated by molecular dynamics simulations. The bilayers are composed of l-stearoyl-2-docosa-hexaenoyl-5M-g]ycero-3-phosphatidylcholine lipids, i.e. the sn 1 chain is 18 C atoms long and the sn2 chain has 22 carbons, including six cis double bonds. The hydrophobic core is in the centre of the picture, and the hydrated head-group regions are both on top and bottom of the view graph. The head group is zwitterionic and no salt has been added. From [102], Reproduced by permission of the American Physical Society. Copyright (2003)...

Figure 11. A schematic representation of the mean-field approximation, a central issue in the self-consistent-field theory. The arrows symbolically represent the lipid molecules. The head of the arrow is the hydrophilic part and the line is the hydrophobic tail. On the left a two-dimensional representation of a disordered bilayer is given. One of the lipids has been selected, as shown by the box around it. The same molecule is depicted on the right. The bilayer is depicted schematically by two horizontal lines. The centre of the bilayer is at z = 0. These lines are to guide the eye the membrane thickness is not preassumed, but is the result of the calculations. Both the potential energy felt by the head groups and that of the tail segments are indicated. We note that in the detailed models the self-consistent potential profiles are of course much more detailed than shown in this graph...

Figure 14. Volume-fraction profiles of parts of the DMPC molecules for lipids that have the head group at positive coordinates (continuous lines) and at negative coordinates (dashed lines). The centre of the bilayer is positioned at z — 0. The phosphate group, the nitrogen of the choline group and the CH3 groups of the tail ends, as well as the other hydrocarbon units, are indicated...

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