Gravitational Wave - Gauge Field Oscillations

Gravitational waves propagating through a stationary gauge field transform into gauge field waves and back again. When multiple families of flavor-space locked gauge fields are present, the gravitational and gauge field waves exhibit novel dynamics. At high frequencies, the system behaves like coupled oscillators in which the gravitational wave is the central pacemaker. Due to energy conservation and exchange among the oscillators, the wave amplitudes lie on a multidimensional sphere, reminiscent of neutrino flavor oscillations. This phenomenon has implications for cosmological scenarios based on flavor-space locked gauge fields.Comment: 4 pages, 3 figures, 1 animation; replacement matches published versio

Cross-Correlation of Cosmological Birefringence with CMB Temperature

Theories for new particle and early-Universe physics abound with pseudo-Nambu-Goldstone fields that arise when global symmetries are spontaneously broken. The coupling of these fields to the Chern-Simons term of electromagnetism may give rise to cosmological birefringence (CB), a frequency-independent rotation of the linear polarization of photons as they propagate over cosmological distances. Inhomogeneities in the CB-inducing field may yield a rotation angle that varies across the sky. Here we note that such a spatially-varying birefringence may be correlated with the cosmic microwave background (CMB) temperature. We describe quintessence scenarios where this cross-correlation exists and other scenarios where the scalar field is simply a massless spectator field, in which case the cross-correlation does not exist. We discuss how the cross-correlation between CB-rotation angle and CMB temperature may be measured with CMB polarization. This measurement may improve the sensitivity to the CB signal, and it can help discriminate between different models of CB.Comment: 9 pages, 1 figure; submitted to PR

Phantom Accretion by Five Dimensional Charged Black Hole

This paper deals with the dynamical behavior of phantom field near five dimensional charged black hole. We formulate equations of motion for steady-state spherically symmetric flow of phantom fluids. It is found that phantom energy accretes onto black holes for $u<0$. Further, the location of critical point of accretion are evaluated that leads to mass to charge ratio for 5D charged black hole. This ratio implies that accretion cannot transform a black hole into a naked singularity. We would like to mention here that this work is an irreducible extension of 4D charged black hole.Comment: 8 pages, accepted for publication in Mod. Phys. Lett.

High resolution, low temperature photoabsorption cross-section of C2H2 with application to Saturn's atmosphere

New laboratory observations of the VUV absorption cross-section of C2H2, obtained under physical conditions approximating stratospheres of the giant planets, were combined with IUE observations of the albedo of Saturn, for which improved data reduction techniques have been used, to produce new models for that atmosphere. When the effects of C2H2 absorption are accounted for, additional absorption by other molecules is required. The best-fitting model also includes absorption by PH3, H2O, C2H6 and CH4. A small residual disagreement near 1600 A suggests that an additional trace species may be required to complete the model

The National Health Insurance, the decentralised clinical training platform, and specialist outreach

According to the Constitution of South Africa (SA), citizens living in remote areas are entitled to the same level of healthcare as those with access to tertiary hospitals. Specialist outreach has been shown to achieve this. When SA’s National Health Services Commission convened (1942 - 1944), Gluckman summarised: ‘Where the need is greatest the supply of hospitals is least.’ Primary healthcare (PHC) characterised the Kark’s Pholela Health Centre and was highly regarded. Although PHC underpins National Health Insurance (NHI) planning, both preventive and curative healthcare are needed. The KwaZulu-Natal (KZN) provincial Department of Health and the University of KZN College of Health Sciences’ 5-year plan for a decentralised clinical teaching platform (DCTP) is ambitious, requiring optimum co-operation between health department and university. Reservations can be addressed through sustained specialist outreach. Above all, the patient must be the chief beneficiary. The NHI and DCTP overlap with specialist outreach, but cannot do without it

The National Health Insurance, the decentralised clinical training platform, and specialist outreach

According to the Constitution of South Africa (SA), citizens living in remote areas are entitled to the same level of healthcare as those with access to tertiary hospitals. Specialist outreach has been shown to achieve this. When SA’s National Health Services Commission convened (1942 - 1944), Gluckman summarised: ‘Where the need is greatest the supply of hospitals is least.’ Primary healthcare (PHC) characterised the Kark’s Pholela Health Centre and was highly regarded. Although PHC underpins National Health Insurance (NHI) planning, both preventive and curative healthcare are needed. The KwaZulu-Natal (KZN) provincial Department of Health and the University of KZN College of Health Sciences’ 5-year plan for a decentralised clinical teaching platform (DCTP) is ambitious, requiring optimum co-operation between health department and university. Reservations can be addressed through sustained specialist outreach. Above all, the patient mustbe the chief beneficiary. The NHI and DCTP overlap with specialist outreach, but cannot do without it