%0 Journal Article %T A Simple Impact Measure and Its Evolution over Time %A Ronald Rousseau %A Fred Y. Ye %J Journal of Library and Information Studies %D 2011 %I National Taiwan University %X We propose a simple informetric measure, called the D-measure, for research performance. This index provides a new approach to combine publications and citations. It is related to Kosmulski¡¯s index for successful papers. We provide an attractive visualization of the evolution of these indices as trajectories in the plane. %K Informetric Measures %K Dynamic Aspects %K Visualization %K D-measure %K K-indicator %U http://jlis.lis.ntu.edu.tw/article/v9-2-1.pdf