the editors-in-chief are vincent h. crespi (pennsylvania state university), bernard s. gerstman (florida international university), a. t. charlie johnson (university of pennsylvania), masaaki tanaka (university of tokyo), and enge g. wang (peking university). the journal is abstracted and indexed by the science citation index expanded and current contents/physical, chemical & earth sciences. according to the "journal citation reports", the journal has a 2018 impact factor of 1.579.