And some may have temporary behavior problems due to stress. For example, the birth of a sibling, a divorce, or a death in the family may cause a child to act out. Behavior disorders are more serious. They involve a pattern of hostile, aggressive, or disruptive behaviors for more than 6 months. The behavior is also not appropriate for the child's age.
Fundamental Ambiguity in the Definition of Vertical Motion Geoffrey Blewitt Mackay School of Earth Sciences and Engineering, University of Nevada, Reno, USA. Abstract. Vertical motion is generally described as motion normal to some defined horizontal surface or family of surfaces. Such a surface can be con-structed geometrically or gravitationally.
vertical adjective. âº âstanding or âpointing âstraight up or at an âangle of 90 to a âhorizontal âsurface or âline: Water that had âleaked from above âformed a vertical âline down one âwall. (Definition of vertical from the Cambridge Academic Content Dictionary Â© Cambridge University Press). See all translations.