The recent VLBI observation of the Galactic center black hole candidate Sgr A* at 1.3mm shows source structure on event-horizon scales. This detection enables a direct comparison of the emission region with models of the accretion flow onto the black hole. We present the first results from time-dependent radiative transfer of general relativistic MHD simulation data, and compare simulated synch...

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Abstract: Perovskite solar cells have become an attractive subject in the solar energydevice area. During ten years of development, the energy conversion efficiency has beenimproved from 2.2% to more than 22%, and it still has a very good potential for furtherenhancement. In this paper, a numerical model of the perovskite solar cell with thestructure of glass/ FTO/ TiO2/...

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We present here by direct argument the classical Clopper-Pearson (1934) “exact” confidence bounds and corresponding intervals for the parameter p of the binomial distribution. The same arguments can be applied to derive confidence bounds and intervals for the negative binomial parameter p, for the Poisson parameter λ, for the ratio of two Poisson parameters, ρ = λ1/λ2, and for the parameter D o...

Set-point theory posits that individuals react to the experience of major life events, but quickly adapt back to pre-event baseline levels of subjective well-being in the years following the event. A large, nationally representative panel study of Swiss households was used to examine set-point theory by investigating the extent of adaptation following the experience of marriage, childbirth, wid...

The paper summarises activities within a broad-based research program for the reconstruction of the evolution of Italian climate in the twentieth century. The main result of the program is that Italian climate is becoming warmer and drier with an increase of both heavy precipitation events and long dry spells. Most of the observed signals appear to be due to changes in atmospheric circulation c...

In this paper, we calculate electron and hole impactionization coefficients in In0.52Al0.48As using a Monte Carlo modelwhich has two valleys and two bands for electrons and holesrespectively. Also, we calculate multiplication factor for electronand hole initiated multiplication regimes and breakdown voltagein In0.52Al0.48As PIN avalanche photodiodes. To validate themodel, we compare our simulat...