Abstract This paper experiments with Burton Mack’s invitation to rethink how scholars frame the past by examining two discourses in Copto-Arabic studies. First, I present scholarly of twentieth and twenty-first centuries about medieval Coptic past, second, examine traditional is perceived legal collections. claim that closely reading these collections reveals ways their authors theorized negoti...

Non-native invasive plant species (NNIPS) pose a serious socio-ecological challenge due to their potential to replace and damage critical human-sustaining ecosystems (OTA 1993 ; Mack et al. 2000 ; Pimentel 2002 ) . The impacts of non-native species are widespread and signi fi cant—altering ecosystem structure and function, threatening other species, and imposing human economic and cultural cost...

We investigate the statistical properties of the polarized emission of extragalactic radio sources and estimate their contribution to the power spectrum of polarization fluctuations in the microwave region. The basic ingredients of our analysis are the NVSS polarization data, the multifrequency study of polarization properties of the B3-VLA sample (Mack et al. 2002) which has allowed us to quan...

A distribution-free formula for the standard error of chain ladder reserve estimates is derived and compared to the results of some parametric methods using a numerical example.

“T are two problems in painting” said American artist Frank Stella (b. 1936) when he was still a brash young man. “One is to fi nd out what painting is, and the other is to fi nd out how to make a painting” (1). Stella’s interest in the defi nition of painting may have refl ected late 19thearly 20th-century modernist concerns. More contemporary concerns focus primarily on how to make a painting...