Tilted alignment

Fig. 7.20 Variation in alignment of chains in lipid simulation with tilt angle [van der Ploeg and Berendsen 1932].

The foundation bed or the structure on which the motor is mounted is not rigid, is tilted or is uneven. Tighten foundation bolts and check for proper alignment of the motor and the drive. Make the foundation or structure as rigid as possible. 

A projectile with a flat noseplate perpendicular to its motion impacts a larger flat specimen plate. However, the specimen plate is not perfectly aligned, resulting in a slight tilt at impact. 

Mesospheric sodium atoms excited at the 3Ps/2 level scatter light in every direction. The backscattered beam observed at an auxiliary telescope B meters away from the main one looks like a plume strip with an angular length (p B 8h / where 8h stands for the thickness of the sodium layer. The tilt of the wavefront at the auxiliary telescope and vibrations equally affects the plume and the NGS. Thus departures of the plume from the average NGS location is due to the only tilt on the upward laser beam. Therefore measuring this departure allows us to know the actual location of the LGS, and to derive the tdt. Because of Earth rotation and of perspective effects, the auxiliary telescope has to track the diurnal rotation, and simultaneously to move on the ground to keep aligned the NGS and the LGS plume. Two mobile auxiliary telescopes are necessary for the two components of the tilt. 

The alignment of the director at the nematic free surface of real systems is not found to exhibit universal behaviour. Depending on the mesogen, homeotro-pic, tilted and planar anchoring have been observed. Clearly, to study this interface in a simulation a potential which exhibits a nematic phase in co-... 

Fig. 1 Solid-state NMR structure analysis relies on the 19F-labelled peptides being uniformly embedded in a macroscopically oriented membrane sample, (a) The angle (0) of the 19F-labelled group (e.g. a CF3-moiety) on the peptide backbone (shown here as a cylinder) relative to the static magnetic field is directly reflected in the NMR parameter measured (e.g. DD, see Fig. 2c). (b) The value of the experimental NMR parameter varies along the peptide sequence with a periodicity that is characteristic for distinct peptide conformations, (c) From such wave plot the alignment of the peptide with respect to the lipid bilayer normal (n) can then be evaluated in terms of its tilt angle (x) and azimuthal rotation (p). Whole-body wobbling can be described by an order parameter, S rtlo. (d) The combined data from several individual 19F-labelled peptide analogues thus yields a 3D structural model of the peptide and how it is oriented in the lipid bilayer...

CH3NH2, showing the 6° variation in N-C-H angle as the H rotates from gauche to anti alignment with the vicinal nN lone pair. The overall methyl tilt (dotted line) is evidently dominated by the strong outward tilting of the C—H bond anti to the lone pair, as discussed above (cf. Fig. 3.66 and Table 3.24). 

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