The local and teleconnective association between Northeast Monsoon Rainfall (NEMR) over Tamil Nadu and global Surface Temperature Anomalies (STA) is examined using the monthly gridded STA data for the period 1901-2004. Various geographical regions which have significant teleconnective signals associated with NEMR are identified. During excess (deficient) NEMR years, it is observed that the meridional gradient in surface air temperature anomalies between Europe and north Africa, in the month of September is directed from the subtropics (higher latitudes) to higher latitudes (subtropics). It is also observed that North Atlantic Oscillation (NAO) during September influences the surface air temperature distribution over north Africa and Europe. Also, the NAO index in January shows significant inverse relationship with NEMR since recent times. The central and eastern equatorial Pacific oceanic regions have significant and consistent positive correlation with NEMR while the western equatorial region has significant negative correlation with NEMR. A zonal temperature anomaly gradient index (ZTAGI) defined between eastern equatorial Pacific and western equatorial Pacific shows stable significant inverse relationship with NEMR.
This paper presents the results of an experimental investigation conducted to study the strength of different repair technique on impact damaged glass fibre reinforced plastics (GFRP) using the acoustic emission technique. ASTM D3039 tensile specimens (250 mm  18 mm  2 mm) fabricated using bi-directional glass fibre and epoxy resin are impacted at low energy (1.89 J) so as to produce a limited yet visible amount of damage. Subsequently, the damaged region is repaired using different methods. These include the bare removal of impacted region (''dressed'' sample), taper sanded (''scarf'') repair or the application of single lap technique. Subsequently, the impacted and differently repaired samples have been subjected to tensile loading to failure monitored using acoustic emission to evaluate the quality of repair obtained, in particular distinguishing between the different failure modes obtained during post-impact tensile tests, namely matrix cracking, delamination and fibre breakage, according to the classification information obtained in previous literature. This allows understanding which mode of failure is dominant in each case and possibly proposing which might be the most suitable repair method for these laminates.
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