( ( The authors ) ( ( present ( ( a ( new design ) ) ( for ( a ( compact ( stand-alone ( force ( and ( friction microscope ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS authors)) (VP (VBP present) (NP (NP (DT a) (JJ new) (NN design)) (PP (IN for) (NP (DT a) (JJ compact) (JJ stand-alone) (NN force) (CC and) (NN friction) (NN microscope))))) (. .)))
The authors present a new design for a compact stand-alone force and friction microscope.
(ROOT (S (NP (NN Friction) (NN force)) (VP (VBZ is) (VP (VBN caused) (PP (IN by) (NP (NP (JJ microscopic) (NNS bumps)) (, ,) (VP (VBZ lumps)) (, ,) (CC and) (NP (NP (NNS imperfections)) (VP (VBG colliding))))))) (. .)))