MISKOLC MATHEMATICAL NOTES, cilt.22, sa.1, ss.363-374, 2021 (SCI-Expanded)
In this study, we define a new type of associated curves in the Euclidean 3-space such as normal-direction curve and normal-donor curve. We obtain characterizations for these curves. Moreover, we give applications of normal-direction curves to some special curves such as helix, slant helix, plane curve or normal-direction (ND)-normal curves in E-3. And, we show that slant helices and rectifying curves can be constructed by using normal-direction curves.