Presenting a new perturbative method to deal with the gravitational N-body problem in general relativity. A novel approach to construct global and local reference frames leads to explicit transformation rules for metric tensor and related relativistic gravitational potentials as well as efficient formulation of the equations of motion.
Considering the electromagnetic and scalar fields in gravity without Lorenz invariance (LI), a model of holographic superconductor is constructed in Horava-Lishitz gravity. The studies show that the effect from broken LI could modify the conductivity and condensate curve lines. The AdS/CFT correspondence implies that it is possible to construct a superconductor based on a gravitational theory without Lorentz invariance.
Chemists at Pohang University of Science and Technology, Korea, have discovered an innovative method to form two-dimensional polyaniline (PANI) nanosheets using ice as a hard template. The product, called PANI-ICE, is reported to have distinctly outstanding electrical properties of low resistivity and high conductivity. PANI-ICE nanosheets show high electronic current flows twice as high as that of graphene and over 40 times higher conductivity of PANI materials produced by existing established synthetic procedures.
Increasing amounts of environmentally valuable and protected land are being cleared for rubber plantations that are economically unsustainable, new research suggests. More widespread monitoring is vital to design policy that protects livelihoods and environments.
University of Adelaide researchers are developing a laser system for fast, noninvasive, onsite breath analysis for disease, potentially enabling screening for a range of diseases including diabetes, infections and various cancers in the future.
Researchers have designed a new cloaking device that overcomes some of the limitations of existing 'invisibility cloaks.' In a new study, electrical engineers at the University of California, San Diego have designed a cloaking device that is both thin and does not alter the brightness of light around a hidden object. The technology behind this cloak will have more applications than invisibility, such as concentrating solar energy and increasing signal speed in optical communications.
Policymakers and developers lack a complete picture of the potential dangers of air pollution when advocating the construction of high-density housing (like apartment buildings) along traffic corridors to take advantage of public transit.
When Greek mythology and cell biology meet, you get the protein Callipygian, recently discovered and named by researchers at The Johns Hopkins University for its role in determining which area of a cell becomes the back as it begins to move.
New research from the University of Copenhagen and Herlev and Gentofte Hospital shows that high vitamin C concentrations in the blood from the intake of fruit and vegetables are associated with a reduced risk of cardiovascular disease and early death.
In a study published in Nature Communications, researchers from McGill University and Université de Montréal report that when electrons move in a phosphorus transistor, they do so only in two dimensions. The finding suggests that black phosphorus could help engineers surmount one of the big challenges for future electronics: designing energy-efficient transistors.