We discuss the global scattering response of invisibility cloaks over the entire electromagnetic spectrum, from static to very high frequencies.Based on linearity, causality, and energy conservation, we show that the total extinction and scattering, integrated over all wavelengths, of any linear, passive, causal, and nondiamagnetic cloak, necessari
Image manipulation, archiving, and sharing are all critical technological aspects of Western culture and postmodern civilization.Consequently, creation, identification, dissemination, and proliferation of powerful images across media channels today indicate a burgeoning area Sleep Formulas of information technology.While words alone are capable of
Renal artery aneurysms are a rare condition and are usually found when other abdominal organ diseases are being searched.Among the causes of renal artery aneurysms, atherosclerosis and fibromuscular dysplasia predominate.However, they can also be observed in congenital Ehlers-Danlos syndrome, neurofibromatosis, arteritis, and due to traumatic effec
The long term response of surface waters to changes in sulphur deposition and afforestation is investigated for three upland river systems in the Galloway region of south-west Scotland.From 1984-1999, these rivers exhibited a statistically significant decline in non-marine sulphate concentrations in response to reduced acid deposition.This reductio