Acoustical coupling between architectural spaces can be implemented by sliding or hinged doors. This study compares the effects of these variable coupling area designs on the sound field using temporal energy decay curve analysis. Varying the aperture size alters the multi-slope decay curve properties such as the decay rate of each slope and their point of intersection (time and level). A predi...

In this paper we study the asymptotic behavior of the viscoelastic system with non dissipative kernels. We show that the uniform decay of the energy depends on the decay of the kernel, the positivity of the kernel in t = 0 and some smallness condition. That is, if the kernel g ∈ C(R) with g(0) > 0, decays exponentially to zero then the solution decays exponentially to zero. On the other hand, i...

The recent discovery of the Bc meson by the CDF collaboration and proposed new experiments at Fermilab and CERN motivate new theoretical studies of the Bc system. Here we investigate the radiative leptonic decay Bc → γlν. This process is an important background to the annihilation process Bc → lν, which will be used to extract the Bc decay constant. We perform a modelindependent calculation, ba...

Intramolecular Förster-type excitation energy transfer (FRET) processes in a series of first-generation polyphenylene dendrimers substituted with spatially well-separated peryleneimide chromophores and a terryleneimide energy-trapping chromophore at the rim were investigated by steady-state and time-resolved fluorescence spectroscopy. Energy-hopping processes among the peryleneimide chromophore...

Photoexcitation dynamics of p-nitroaniline (pNA) and N,N-dimethyl-p-nitroaniline (DMpNA) in 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([Cnmim][NTf2]) with different alkyl chain lengths (from C2 to C12) was investigated using transient absorption spectroscopy. The internal conversion rate from the excited state to the ground state was estimated from bleach recovery around th...

We generalize the Weisskopf-Wigner theory for the line shape and transition rates of decaying states to the case of the energy-driven stochastic Schrödinger equation that has been used as a phenomenology for state vector reduction. Working to leading order in the perturbing potential inducing the decay, and assuming that the perturbing potential has vanishing matrix elements within the degenera...

We examine a sample of 48 Swift/UVOT long Gamma-ray Burst light curves and find a correlation between the logarithmic luminosity at 200s and average decay rate determined from 200s onwards, with a Spearman rank coefficient of -0.58 at a significance of 99.998% (4.2σ). We discuss the causes of the log L200s − α>200s correlation, finding it to be an intrinsic property of long GRBs, and not result...

The tritium content of U.S. National Bureau of Standards tritiated water Standard Reference Materials SRM-4926, -4926C and -4927B have been measured by mass spectrometry, where the accumulation of 3He from tritium decay is measured as a function of time. The averaged results, which are compared with other independent calibrations, are 0.7% higher than the NBS certified values and have an uncert...

Examples are given which prove the ICARUS detector quality through relevant physics measurements. We study the μ decay energy spectrum from a sample of stopping μ events acquired during a also at IFSI del CNR, sezione presso LNF. 234 The ICARUS Collaboration: Measurement of the μ decay spectrum with the ICARUS liquid Argon TPC the test run of the ICARUS T600 detector. This detector allows the s...