The present paper deals with the dynamics of spatially flat Friedmann-Lemaitre-Robertson-Walker (FLRW) cosmological model a time varying constant $\Lambda$ where evolves cosmic (t) through Hubble parameter (H). We consider that has reflection symmetry $H \rightarrow -H $ $\Lambda(H)$ expressed in form Taylor series respect to H. Dynamical systems for three different cases based on possibilities...

The demonstration of reversible lithium insertion into oxide hosts1!4 has made the advent of the Liþ-ion battery possible. However, the organic liquid-carbonate electrolytes used have an energy gap (Eg) between their lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) located between 1.1 V and 4.3 V versus Liþ/Li0, which makes the electrochemical potential (...

The two independent components of the gyration tensor of quartz, g(11) and g(33), have been spectroscopically measured using a transmission two-modulator generalized ellipsometer. The method is used to determine the optical activity in crystals in directions other than the optic axis, where the linear birefringence is much larger than the optical activity.

Objective. To determine the safety of long-term (36 months) administration of an inhaled corticosteroid (budesonide) on hypothalamic-pituitary-adrenal (HPA) axis function in children with mild to moderate asthma. Methods. This was an ancillary study of the Childhood Asthma Management Program (CAMP). Sixty-three children who had mild to moderate asthma and were enrolled in CAMP underwent evaluat...

We present a systematic study of the Raman spectra of optical phonons in graphene monolayers under tunable uniaxial tensile stress. Both the G and 2D bands exhibit significant red shifts. The G band splits into 2 distinct subbands (G(+), G(-)) because of the strain-induced symmetry breaking. Raman scattering from the G(+) and G(-) bands shows a distinctive polarization dependence that reflects ...

Effective g factors of electrons and heavy holes in CdTe/CdMgTe quantum wells have been measured with high accuracy as a function of the angle between the magnetic field and the structure growth axis. As a result, we have observed the electron g factor anisotropy in A,B6-based heterostructures. The dependences of the g factor tensor components on the quantum-well width and the solid solution co...

Take an n-dimensional manifold M . Endow it with a distribution, by which I mean a smooth linear subbundle D ⊂ TM of its tangent bundle TM . So, for x ∈ M , we have a k-plane Dx ⊂ TxM , and by letting x vary we obtain a smoothly varying family of k-planes on M . Put a smoothly varying family g of inner products on each k-plane. The data (M,D, g) is, by definition, a sub-Riemannian geometry. Tak...