A formula for the donor photoluminescence decay time in its dependence on the concentrations of donor D and acceptor A has been derived from equations for the non-radiative excitation energy transfer between randomly distributed donor and acceptor molecules within a nonactive medium. In the limit [D]/[A] -> 0 the formula becomes identical with that of Galanin [7], while in the absence of concen...

STATE HEALTH DEPARTMENTS’ MISSION AND STRATEGIES State health departments have traditionally worked in many areas of public health, including injury prevention (1). The public health approach toward injury and disease prevention directs programs to examine surveillance data and then design, implement, and evaluate strategies to address problems, such as falls among older adults (1, 2). The emph...

Many experimental methods, giving information about the molecular interactions in liquid crystalline mesophases, have been developed [1]. One of the most important ones is the polarized fluorescence experiment, which enables one to obtain the order parameters and (P4} of a dye probe dissolved in a liquid crystalline matrix ("guest-host" system) [2-9], It was shown that under particular con...

The decay rate of 7Be depends on the electron density at the nucleus and therefore may vary with the chemical environments of the Be atom. Using a 100% efficiency high-purity germanium detector, the decay constants of Be in Be2C(OH2)4, Be(OH)2 and BeO have been measured at unprecedented high precision (of š0.01%), resulting in T1=2 D 53.69 d, 53.42 d, and 54.23 d, respectively. The observed dif...

We study the susceptible-infected model with power-law waiting time distributions P (τ ) ∼ τ, as a model of spreading dynamics under heterogeneous human activity patterns. We found that the average number of new infections n(t) at time t decays as a power law in the long time limit, n(t) ∼ t, leading to extremely slow prevalence decay. We also found that the exponent in the spreading dynamics, ...

New hydrodynamic models with feedback show that feedback driven turbulence and subsequent relaxation can drive recurrent starbursts, though most of these bursts fizzle due to premature, asymmetric ignition. Strong bursts are terminated when the turbulence inflates the multiphase central disk. The period between bursts is about twice a free-fall time onto the central disk. Transient spirals and ...

The properties of X-ray Nova XTE J1755– 324, observed with RXTE observatory in 1997 are reported. The lightcurve of the source was typical for X-ray Novae, except for somewhat shorter decay time scale and the time elapsed between the primary and subsequent secondary and tertiary outbursts. At the peak of the lightcurve the source had two-component spectrum, typical for the bright X-ray Novae, w...

3. DECAY PREDICTION. Unfortunately, decay prediction models for stone fruit have not been developed yet. A possible method of disease prediction might consist of prior to commercial harvest placing fruit of more advanced maturity into a plastic bag with wet paper to induce decay development. If decay develops rapidly, this may suggest that some lots of fruit receive additional preharvest fungic...

Analytical and numerical estimates show that a charged Affleck-Dine condensate will fracture into Q-balls only when the Hubble time is significantly larger than the inverse soft-breaking mass of the field in question. This would generally imply that the decay of the field into light fermions will compete with Q-ball formation. We will show that for typical flat directions the large field value ...

We discuss why the SU(3) supersymmetric model with the most general superpotential can naturally break to the standard model if gauge singlets and a discrete symmetry are included. This mechanism does away with the need for fine-tuning in the form of the assumed absence of certain terms in the superpotential. It also automatically guarantees that any abelian discrete phase symmetry of the GUT w...