47 research outputs found
Special geometry of Euclidean supersymmetry II: hypermultiplets and the c-map
We construct two new versions of the c-map which allow us to obtain the
target manifolds of hypermultiplets in Euclidean theories with rigid N =2
supersymmetry. While the Minkowskian para-c-map is obtained by dimensional
reduction of the Minkowskian vector multiplet lagrangian over time, the
Euclidean para-c-map corresponds to the dimensional reduction of the Euclidean
vector multiplet lagrangian. In both cases the resulting hypermultiplet target
spaces are para-hyper-Kahler manifolds. We review and prove the relevant
results of para-complex and para-hypercomplex geometry. In particular, we give
a second, purely geometrical construction of both c-maps, by proving that the
cotangent bundle N=T^*M of any affine special (para-)Kahler manifold M is
para-hyper-Kahler.Comment: 36 pages, 1 figur
Too Hot to Handle: An Evaluation of the Effect of Thermal Visual Representation on User Grasping Interaction in Virtual Reality
Influence of interaction fidelity and rendering quality on perceived user experience have been largely explored in Virtual Reality (VR). However, differences in interaction choices triggered by these rendering cues have not yet been explored. We present a study analysing the effect of thermal visual cues and contextual information on 50 participants' approach to grasp and move a virtual mug. This study comprises 3 different temperature cues (baseline empty, hot and cold) and 4 contextual representations; all embedded in a VR scenario. We evaluate 2 different hand representations (abstract and human) to assess grasp metrics. Results show temperature cues influenced grasp location, with the mug handle being predominantly grasped with a smaller grasp aperture for the hot condition, while the body and top were preferred for baseline and cold conditions
Modified Gravity and Cosmology
In this review we present a thoroughly comprehensive survey of recent work on
modified theories of gravity and their cosmological consequences. Amongst other
things, we cover General Relativity, Scalar-Tensor, Einstein-Aether, and
Bimetric theories, as well as TeVeS, f(R), general higher-order theories,
Horava-Lifschitz gravity, Galileons, Ghost Condensates, and models of extra
dimensions including Kaluza-Klein, Randall-Sundrum, DGP, and higher
co-dimension braneworlds. We also review attempts to construct a Parameterised
Post-Friedmannian formalism, that can be used to constrain deviations from
General Relativity in cosmology, and that is suitable for comparison with data
on the largest scales. These subjects have been intensively studied over the
past decade, largely motivated by rapid progress in the field of observational
cosmology that now allows, for the first time, precision tests of fundamental
physics on the scale of the observable Universe. The purpose of this review is
to provide a reference tool for researchers and students in cosmology and
gravitational physics, as well as a self-contained, comprehensive and
up-to-date introduction to the subject as a whole.Comment: 312 pages, 15 figure
Correspondence - WKU Press Box
Correspondence in response to Resolution 89-1-F regarding painting Western Kentucky University across top of Smith Stadium press box