We study the short distance behaviour of euclidean quantum gravity in the light of Weinberg’s asymptotic safety scenario. Implications of a non-trivial ultraviolet fixed point are reviewed. Based on an optimised renormalisation group, we provide analytical flow equations in the Einstein-Hilbert truncation. A non-trivial ultraviolet fixed point is found for arbitrary dimension. We discuss a bifu...

We study the instantaneous Stokes flow near the apex of a corner of angle 2a formed by two plane stress free surfaces. The fluid is under the action of gravity with gW parallel to the bisecting plane, and surface tension is neglected. For 2a.126.28°, the dominant term of the solution as the distance r to the apex tends to zero does not depend on gravity and has the character of a self-similar s...

Recent experimental and imaging studies suggest that the influence of gravity on the measured distribution of blood flow in the lung is largely through deformation of the parenchymal tissue. To study the contribution of hydrostatic effects to regional perfusion in the presence of tissue deformation, we have developed an anatomically structured computational model of the pulmonary circulation (a...

We present a physical analogy which can be used to understand the issues involved in the Principle of Equivalence in so-called spatial flow theories of gravity, and we discuss the essential kinematic properties of the flow which distinguish its gravitational, non-inertial, and inertial modes. We also point out that the acceleration experienced by a body moving in the flow does not always coinci...

We investigate the dynamics of thin films driven by gravity on the outer surface of a cylinder and sphere. The surface is rigid, stationary and the axis of the cylinder is horizontal. An instantaneous release of a constant volume of fluid at the top of the cylinder or sphere results initially in a two-dimensional or axisymmetric current respectively. The resultant flow of a thin film of fluid i...

The interfacial instabilities important to the modeling of critical heat flux (CHF) in reduced-gravity systems are sensitive to even minute body forces, especially for small coolant velocities. Understanding these effects is of paramount importance to both the reliability and safety of two-phase thermal management loops proposed for future space and planetary-based thermal systems. Unfortunatel...

This paper examines, for the first time, the trade and FDI impacts of a North American Security Perimeter that would liberalize the post 9/11 security measures at the Canada-US border. First, the study estimates econometrically the impact of post 9/11 security measures on bilateral (US-Canada) trade flows using a gravity model. Second, using these econometric estimates together with a three-reg...

This paper investigates the relationship between intra-industry trade (IIT) and immigration flows using a gravity model for the period 2000-2010 between Portugal and European Union’s Member States (EU-27). The present study uses the methodology of Kandogan (2003) for separating IIT into its components horizontal (HIIT) and vertical intra-industry trade (VIIT).Using a panel data approach, our st...

Formal remittance flows to Pakistan have shown noticeable growth over the past decade. Using bilateral remittance data for 23 major source countries, this study examines the external and internal factors driving these remittance flows during the period 2001-2011. We estimate a gravity model for bilateral remittance flows using a variety of panel data techniques suitable to control for unobserve...