Programmers have traditionally been passive users of compilers, rather than active exploiters of their transformational abilities. This paper presents MAGIK, a system that allows programmers to easily and modularly incorporate applicationspecific extensions into the compilation process. The MAGIK system gives programmers two significant capabilities. First, it provides mechanisms that implement...

Social organisms rank among the most abundant and ecologically dominant species on Earth, in part due to exclusive recognition systems that allow cooperators to be distinguished from exploiters. Exploiters, such as social parasites, manipulate their hosts' recognition systems, whereas cooperators are expected to minimize interference with their partner's recognition abilities. Despite our wealt...

Rangelands are known as one of the main income resources for their exploiters.In the recent century, management of Iran rangeland has undergone vast transformationsbecause of vulnerable socio-economic conditions of pastoralists. A study was done toprovide a clear picture of the status and utilization of Aq Qala rangelands via assessinginternal and external environmental factors affecting the ut...

States and localities can have significant interest in the manner and extent to which federal officials enforce provisions of the Immigration and Nationality Act (INA) regarding the exclusion and removal of unauthorized aliens. Some states and localities, concerned that federal enforcement disrupts families and communities, or infringes upon human rights, have adopted " sanctuary " policies lim...