Thermal behavior of the poly(2-methoxy)-Cyanurate of 1,1′-bis(4-hydroxy phenyl)-Cyclohexane

Thermal behavior of unfractionated poly(2-methoxy)-Cyanurate, PMCBC- film has been reported. The degradation of the polymer involved two steps. The glass transition temperature, T_g, from DSC and DMA studies is ～ 200°C. TMA study shows that the glass-rubber transition region is in the range of 157 to 199°C. The thermal stability of PMCBC has been found to be superior to commercially available polymers.     

Electric field effects on quasi-coherent energy transfer

The effect of an external electric field on the rate of electronic excitation energy transfer in a model molecular crystal system is shown to depend on the nature of the site-to-site transfer and on whether the directional coherence is limited by phonon scattering or by defect scattering processes.     

Rapidity density distributions in antiproton-proton collisions

Data on the density of charged particles in rapidity space for annihilation and non-annihilation p?p interactions at 7.3 and 12 GeV/c are reported. It is shown that the central rapidity density for non-annihilation processes is a simple linear function of $\text{ln}\text{(}\text{s}\text{)}$ from these low energies up to p?p collider energies ($\text{s}\text{=540}\text{GeV}$). Significant differences in density distributions for p?p and e^?e⁺ annihilations at comparable energies are found.     

Trace inequalities involving Hermitian matrices

Some trace inequalities for Hermitian matrices and matrix products involving Hermitian matrices are presented.     

Algorithms for adaptive stochastic control for a class of linear systems

This paper is concerned with the control of linear, discrete-time, stochastic systems with unknown control gain parameters. Two suboptimal adaptive control schemes are derived: One is based on underestimating future control and the other is based on overestimating future control. Both schemes require little on-line computation and incorporate in their control laws some information on estimation errors. The performance of these laws is studied by Monte Carlo simulations on a computer. Two single-input, third-order systems are considered, one stable and the other unstable, and the performance of the two adaptive control schemes is compared with that of the scheme based on enforced certainty equivalence and the scheme where the control gain parameters are known.     

On tests of independence forr×c Markovian contingency tables

Summary This paper deals with testing the hypothesis of independence of two attributes inr×c Markovian Contingency tables. Likelihood ratio test and χ²-test of the form used in contingency tables are proposed. It is observed that both likelihood ratio criterion and χ²-test lead to the same test statistic in the sense that −2 log λ and χ²-test have asymptotically the same distribution.     

Branching fractions for psi(2S)-to-J/psi transitions

We describe new measurements of the inclusive and exclusive branching fractions for psi(2S) transitions to J/psi using e(+)e(-) collision data collected with the CLEO detector operating at CESR. All branching fractions and ratios of branching fractions reported here represent either the most precise measurements to date or the first direct measurements. Indirectly and in combination with other CLEO measurements, we determine B(chi(cJ) --> gamma(J/psi)) and B[psi(2S) --> light hadrons].     

Depth-resolved fluorescence measurement in a layered turbid medium by polarized fluorescence spectroscopy

We show that, when a turbid medium with a layered fluorophore distribution is excited by linearly polarized light, measurement of angle-resolved polarized fluorescence can provide depth-resolved fluorescence measurements.