Flashing (weatherproofing) bark was occasionally used as a flashing material. Most flashing materials today are metal, plastic, rubber, or impregnated paper. Metal flashing materials include lead, aluminium, copper, stainless steel, zinc alloy, other architectural metals or a metal with a coating such as galvanized steel, lead-coated copper, anodized aluminum, terne-coated copper, galvalume (aluminum-zinc alloy coated sheet steel), and metals similar to stone-coated metal roofing. Metal flashing should be provided with expansion joints on long runs to prevent deformation of the metal sheets due to expansion and contraction, and should not stain or be stained by adjacent materials or react chemically with them.
Anarchy Is What States Make of It another; structure has no existence or causal powers apart from process. Self-help and power politics are institutions, not essential features, of anarchy. Anarchy is what states make of it". Anarchy Is What States Make of It "Anarchy Is What States Make of It: The Social Construction of Power Politics" is a journal article by Alexander Wendt published in "International Organization" in 1992 that outlines a constructivist approach to international relations theory. Wendt argues that anarchy is not inherent in the international system in the way in which other schools of international relations theory envision it, but rather it is a