S-brane solutions with orthogonal intersection rules

S-Duality at the Black Hole Threshold in Gravitational Collapse

S-matrices for spinor particles on Reissner-Nordström black holes

S-matrix for s-wave gravitational scattering

Saddle points of stringy action

Saddle-point dynamics of a Yang-Mills field on the exterior Schwarzschild spacetime

Sagnac effect and pure geometry

Sagnac Effect of Goedel's Universe

Sagnac effect, twin paradox and space-time topology - Time and length in rotating systems and closed Minkowski space-times

Sagnac Interferometer as a Speed-Meter-Type, Quantum-Nondemolition Gravitational-Wave Detector

Sagnac interferometry and non-Newtonian gravity

Sakharov's induced gravity: a modern perspective

Satellite Eötvös Test of the Weak Equivalence Principle for Zero-Point Vacuum Energy

Satellite gravitational orbital perturbations and the gravitomagnetic clock effect

Satellite non-gravitational orbital perturbations and the detection of the gravitomagnetic clock effect

Scalar and Spinor Fields in Signature Changing Spacetimes

Scalar and Spinor Particles in the Spacetime of a Domain Wall in String Theory

Scalar and Spinor Perturbation to the Kerr-NUT Spacetime

Scalar and spinor perturbation to the most generalised Kerr-NUT space-time

Scalar and spinor solutions in the spacetimes of vacuumless defects