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Quantum chemical calculations have been performed on the ground state and several low-lying excited states of bromobenzene, ortho-, meta-, and para-dibromobenzene, and 1,3,5-tribromobenzene using high-level ab initio and hybrid density-functional methods. Experimental observations of ultrafast predissociation in these molecules are clarified from extensive(More)
Irrigating fruit orchards and crops with bicarbonate waters was found to develop stunted growth and malnutrition symptoms. These symptoms were related, in most cases, to the bicarbonate ion effect on plant nutrition. Direct effects of bicarbonate on respiration, reducing absorption of ions and inducing chlorosis etc. were reported by B a x t e r and B e l c(More)
The electromagnetic (EM) coupling on a printed circuit board (PCB) is a very important concern when investigating electromagnetic interference (EMI) issues. This paper presents an approach to model a non-uniform external EM radiation to a single trace on a PCB. The approach is totally analytic and based on the quasi-TEM (Transverse ElectroMagnetic)(More)
Photodissociation of diiodomethane (CH2I2) in acetonitrile solution has been studied with ab initio molecular dynamics simulations, which show how the iso-diiodomethane photoproduct (CH2I-I) can be formed. The first excited state, described by the "restricted open-shell Kohn-Sham" density functional method, is dissociative and photoexcitation of(More)
A new reliability study in SiGe Heterojunction Bipolar Transistors (HBTs) is investigated resulting from electromagnetic field aggression. We demonstrate experimental evidence of current gain degradation during electromagnetic stress. The device degradation is due to the Hot Carrier (HC) injected into the emitter- base spacer oxide, which induces(More)
In lysimeters filled with sand from the Wadi el Natrun Area, the effect of varying levels of bicarbonate in irrigation solutions on the growth and mineral content of barley, var. Maryut, was investigated. Crop yield decreased progressively with the bicarbonate ion level and this condition was associated with symptoms of chlorosis. The bicarbonate levels of(More)