The X-ray light curve of CAL 83 as measured with the ROSAT HRI covering ∼ 1 2 years (from July 95 to Dec 96) is derived. These observations show the pre-off state (persistent state), the April 96 off-state and the post off-state which returns after some decline to its previous persistent level. The intensity variations are discussed in the model of variations of the temperature of the envelope ...

background: metabolic profiles have been used in efforts to predict pre parturient problems and fertility, to diagnose metabolic diseases, and to assess nutritional status in dairy cows. these profiles may help to confirm the diagnosis of sub clinical diseases, to be aware of possible causes of infertility in the herds, or to monitor improvement in herd animals. objectives: this study investiga...

maximizing economic earnings is the most common goal in cut-off grade optimization of open-pit mining operations. when this is the case, the price of the product has a critical effect on optimum value of cut-off grade. this paper investigates the relationship between optimum cut-off grade and price to maximize total cash flow and net percent value (npv) of operation. in order to visualize this ...

Article history: Received 30 June 2015 Received in revised form 20 November 2015 Accepted 30 November 2015 Available online 7 December 2015 This paper reports an analysis of the degradation mechanisms of GaN-based normally-off transistors submitted to off-state stress, forward-gate operation and electrostatic discharges. The analysiswas carried out on transistors with p-type gate, rated for 600...