[en] Part A. Recent studies on particle and power control in long duration lower hybrid current drive (LHCD) operations in TRIAM-1M are presented. Particle control through gas puffing (t < 20 s) shows that steady coupling of LH waves is attained at 40 s from the initiation of the discharge. High power handling is carried out over 20 s under the power load of several MW/m2 for the poloidal limiters. Part B. Part B reports on an upshift frequency electron cyclotron current drive experiment in an LHCD plasma and on heat pulse propagation by means of localized EC heating in the WT-3 tokamak (R0 = 0.65 m, a = 0.2 m, Bt ≤ 1.75 T). (author). 10 refs, 5 figs