Searches for pair-production of supersymmetric particles under the assumpti
on that R-parity is violated via a single dominant LL (E) over bar, LQ (D)
over bar, or (U) over bar (D) over bar (D) over bar coupling are performed
using the data collected by the ALEPH collaboration at centre-of-mass energ
ies of 181-184 GeV. The observed candidate events in the data are in agreem
ent with the Standard Model expectations. Upper limits on the production cr
oss-sections and lower limits on the masses of charginos, sleptons, squarks
and sneutrinos are derived.