The word "raper" is a negative term used to describe someone who forcefully engages in non-consensual sexual activity with another person. Full definition
The effective climate sensitivity and ocean heat uptake are compared by Raper et al. (2001b) using the CMIP2 data set (1 % / yr CO2 increase to doubling). (ipcc.ch)
But while many teachers are receptive to feedback, Raper says linking pay to performance creates competition where cooperation is needed. (indianapublicmedia.org)
Wigley, T.M.L., and S.C.B. Raper, 1992: Implications for climate and sea level of revised IPCC emissions scenarios. (ipcc.ch)