Stochastic Gravity: Theory and Applications

Whereas semiclassical gravity is based on the semiclassical Einstein equation with sources given by the expectation value of the stress-energy tensor of quantum fields, stochastic semiclassical gravity is based on the Einstein-Langevin equation, which has in addition sources due to the noise kernel. In the first part, we describe the fundamentals of this new theory via two approaches: the axiomatic and the functional. In the second part, we describe three applications of stochastic gravity theory. First, we consider metric perturbations in a Minkowski spacetime, compute the two-point correlation functions of these perturbations and prove that Minkowski spacetime is a stable solution of semiclassical gravity. Second, we discuss structure formation from the stochastic gravity viewpoint. Third, we discuss the backreaction of Hawking radiation in the gravitational background of a black hole and describe the metric fluctuations near the event horizon of an evaporating black holeComment: 100 pages, no figures; an update of the 2003 review in Living Reviews in Relativity gr-qc/0307032 ; it includes new sections on the Validity of Semiclassical Gravity, the Stability of Minkowski Spacetime, and the Metric Fluctuations of an Evaporating Black Hol

Relationship marketing in the casino industry

For casinos involved in targeting high-end clients, relationship building and customer retention are important marketing activities. This paper investigates the effectiveness of two marketing approaches, namely customer orientation and adaptability. The paper explores how these approaches influence the performance of frontline employees operating in the casino high-end market. The investigation involved a survey administered to frontline service representatives within the VIP gaming areas of one of the world’s largest casinos. The questionnaire focused on the issues of customer orientation, adaptability and service performance. Various statistical analyses including multiple regression were deployed to analyse the data generated by the 152 valid responses. It is concluded that relationship-oriented selling behaviours are significant predictors of service performance. The predictive capacity of adaptability was particularly strong in terms of the criterion variable