Measurements of the molar Kerr constants of 14 n-alcohols between methanol and octadecanol are reported. Semi-axes of the polarisability ellipsoids for the first six alcohols are calculated and discussed, From methyl alcohol the longitudinal and transverse polarisabilities of the 0-H bond appear as 0.09, and 0-05 x Such values are used to indicate that the preferred conformation of ethyl alcohol is s-trans. Approximate constant differences between corresponding semi-axes of adjacent homol o p e s are noted and interpreted as due to a common pattern of configuration

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This paper presents design and development of a flexible GMR sensor array for nondestructive detection of service-induced defects on the outer surface of 64 mm diameter steel track rope. The number of GMR elements and their locations within saddle-type magnetizing coils are optimized using a three dimensional finite element model. The performance of the sensor array has been evaluated by measuring the axial component of leakage flux from localized flaw (LF) and loss of metallic cross-sectional area (LMA) type defects introduced on the track rope. Studies reveal that the GMR sensor array can reliably detect both LF and LMA type defects in the track rope. The sensor array has a fast detection speed along the length of the track rope and does not require circumferential scanning. It is also possible to image defects using the array sensor for obtaining their spatial information.

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