The experimental results of the two-photon absorption(TPA) and Mössbauerrotor(MR) for testing the isotropy of the speed of light are explained in an ether drift model with a drift velocity of ∼ 10c. Further tests of the ether drift assumption are suggested.

Using the bidirectional NICS scan method in conjunction with two-photon absorption (TPA) measurements, it has proved possible to determine the relationship between pi-conjugation and aromaticity in two structurally related expanded porphyrin systems, sapphyrin and inverted sapphyrin, and establish that differences in these defining factors depend on the presence or absence of a key sp3 hybrid m...

background: during radiotherapy treatment, critical organs are shielded using lead and cerrobend blocks. the objective of this study is to compare the effects of lead and cerrobend shielding blocks on incident photon beam. methods: collimator scatter factors were measured for open square fields (3 x 3 cm to 40 x 40 cm) defined by collimator jaws and for fields blocked down to smaller asymmetric...

We treat the nonrelativistic Compton scattering process in which an incoming photon scatters from an N-electron many-body state to yield an outgoing photon and a recoil electron, without invoking the commonly used frameworks of either the impulse approximation ~IA! or the independent particle model ~IPM!. An expression for the associated triple differential scattering cross section is obtained ...

The production of four fermions plus a visible photon in electron-positron collisions is analyzed in the LEP2 energy range. The study is based on the calculation of exact matrix elements, including the effect of fermion masses. In the light of the present measurements performed at LEP, triple and quartic anomalous gauge couplings are taken into account. Due to the presence of a visible photon i...

We calculate the third order nonlinear optical response in the Hubbard model within the spin density wave (SDW) mean field ansatz in which the gap is due to onsite Coulomb repulsion. We obtain closed-form analytical results in one dimension (1D) and two dimension (2D), which show that nonlinear optical response in SDW insulators in 2D is stronger than both 3D and 1D. We also calculate the two p...

Terephthalic acid (TPA) is an important industrial chemical currently produced by energy intensive and potentially hazardous p-xylene (pX) oxidation process. Here we report the development of metabolically engineered Escherichia coli system for biological transformation of pX into TPA. The engineered E. coli strain harbours a synthetic TPA pathway optimized through manipulation of expression le...

Exploiting the fact that W pair production in high-energy γγ collisions is very large, we use this process to trigger Higgs, Z or photon radiation. We find that there are sizeable rising cross-sections for triple bosons production. At energies about 1TeV the new mechanism for Higgs production becomes very competitive with the dominant Higgs production processes in e+e− and eγ reactions. The eff...