Now showing items 51-56 of 56
Predicting neighborhoods’ socioeconomic attributes using restaurant data
(Proceedings of the National Academy of Sciences, 2019-07-15)
Accessing high-resolution, timely socioeconomic data such as data on population, employment, and enterprise activity at the neighborhood level is critical for social scientists and policy makers to design and implement ...
Regularizations of time-crystal dynamics
(Proceedings of the National Academy of Sciences, 2019-08-14)
We demonstrate that nonconvex Lagrangians, as contemplated in the theory of time crystals, can arise in the effective description of conventional, physically realizable systems. Such embeddings resolve dynamical singularities ...
Topology on a new facet of bismuth
(Proceedings of the National Academy of Sciences, 2019-06-13)
Bismuth-based materials have been instrumental in the development of topological physics, even though bulk bismuth itself has been long thought to be topologically trivial. A recent study has, however, shown that bismuth ...
Using massive online choice experiments to measure changes in well-being
(Proceedings of the National Academy of Sciences, 2019-03-26)
Gross domestic product (GDP) and derived metrics such as productivity have been central to our understanding of economic progress and well-being. In principle, changes in consumer surplus provide a superior, and more direct, ...
Measuring light transport properties using speckle patterns as structured illumination
(Springer Science and Business Media LLC, 2019-08-01)
The measurement of light absorption and scattering properties of biological materials has several diagnostic and therapeutic applications. We can measure these properties for skin without contact using structured illumination ...
Organo-mineral associations in chert of the 3.5 Ga Mount Ada Basalt raise questions about the origin of organic matter in Paleoarchean hydrothermally influenced sediments
(Springer Science and Business Media LLC, 2019-11-13)
Hydrothermal and metamorphic processes could have abiotically produced organo-mineral associations displaying morphological and isotopic characteristics similar to those of fossilized microorganisms in ancient rocks, thereby ...