In this exploratory study, we compared current and former pescatarians, vegetarians and vegans on a number of variables including the motivations for their food choices. Participants were recruited via online message boards as well as through snowball sampling. Of the 247 participants, 196 were currently limiting animal products and 51 were former animal product limiters. Current limiters were ...

We introduce a general framework for enforcing local or global maximum principles in high-order space-time discretizations of scalar hyperbolic conservation law. begin with sufficient conditions space discretization to be bound preserving (BP) and satisfy semi-discrete principle. Next, we propose monolithic convex (GMC) flux limiter which has the structure flux-corrected transport (FCT) algorit...

This paper examines the behavior of flux and slope limiters on non-uniform grids in multiple dimensions. Many slope limiters in standard use do not preserve linear solutions on irregular grids impacting both accuracy and convergence. We rewrite some well-known limiters to highlight their underlying symmetry, and use this form to examine the properties of both traditional and novel limiter formu...

We introduce a new high-resolution central scheme for multidimensional Hamilton–Jacobi equations. The scheme retains the simplicity of the non-oscillatory central schemes developed by C.-T. Lin and E. Tadmor (in press, SIAM J. Sci. Comput.), yet it enjoys a smaller amount of numerical viscosity, independent of 1/1t. By letting 1t ↓ 0 we obtain a new second-order central scheme in the particular...

The aim of this work is to analyze the use of a number of flux-limiters to simulate numerically the behavior of a homogeneous tubular reactor which exhibits steep moving fronts. The strength and limitations of five different flux-limiters are examined for different test cases. All flux-limiters are found successful in capturing the steep concentration profiles. The simulations show that the min...

An approximate Riemann solver for the Aw-Rascle traffic flow model and the extension of Greenberg is constructed on the algebraic level. A discrete diffusion operator is added to the (oscillatory) high-order finite difference/element discretization to enforce a vectorial LED criterion. This yields a nonoscillatory but diffusive low-order scheme. To increase the accuracy an antidiffusion operato...

In this work, a framework to construct arbitrarily high-order low-dissipation shock-capturing schemes with flexible and controllable nonlinear dissipation for convection-dominated problems is proposed. While set of candidate stencils incremental width constructed, each one indicated as smooth or nonsmooth by the ENO-like stencil selection procedure proposed in targeted essentially non-oscillato...

In the mid-1990s, seat belt load-limiting devices were introduced on many new passenger vehicles equipped with front airbags. These devices are intended to reduce belt-induced injuries such as rib fractures by allowing forward movement of occupants’ torsos when belt loads exceed some threshold. Load limiters have been shown to reduce thoracic injury risk in controlled experiments with cadavers ...

General positive-definite and monotonic limiters are described for use with unrestricted-Courant-number flux-form transport schemes. These limiters are tested using a time-split multidimensional transport scheme. The importance of minimizing the splitting errors associated with the time-split operator and of the consistency between the transport scheme and the discrete continuity equation is de...