The most common shielding gases used for these main arc welding processes include argon (Ar), helium (He), carbon dioxide (CO2) and oxygen (O2). While Ar, He and CO2 may be used by themselves (i.e. 100%) for certain applications, in other cases the four gases are mixed together in different combinations to form shielding gas blends.
Cluster reduction in speech is when a consonant cluster, that is two or three consonants occurring in sequence in a word (like ândâ in friend), is reduced by a child into a single consonant through omission.
portion burst (release plus aspiration) of a stop consonant in initial position of syllable contains invariant perceptual information. But Dorman et al., [9] found that the burst and transition act in a complementary manner in identifying the initial voiced stops /b, d, g/. Ohde and Sharf [7] performed experiments with natural