Results 21 to 30 of about 22,594 (207)

The geometric sense of R. Sasaki connection [PDF]

, 2002
For the Riemannian manifold $M^{n}$ two special connections on the sum of the tangent bundle $TM^{n}$ and the trivial one-dimensional bundle are constructed. These connections are flat if and only if the space $M^{n}$ has a constant sectional curvature $\
Alexey V Shchepetilov, Beals R, Chern S S, Ding Q, Kobayashi S, Marvan M, Min-Oo M, Sasaki S, Sym A, Terng C-L   +9 more
core   +4 more sources

On the validity of mean-field amplitude equations for counterpropagating wavetrains

, 1994
We rigorously establish the validity of the equations describing the evolution of one-dimensional long wavelength modulations of counterpropagating wavetrains for a hyperbolic model equation, namely the sine-Gordon equation.
C E Wayne, Cazenave T, Chikwendu S C, Collet P, Craig W, Hunter J K, Kalyakin L A, Kirrmann P, Knobloch E, Knobloch E Nonlocal amplitude equations, Majda A, Okamura M, Pierce R D, R D Pierce, Schneider G, Schneider G, van Harten A, Zakharov V E   +17 more
core   +2 more sources

A Modified Magnitude System that Produces Well-Behaved Magnitudes, Colors, and Errors Even for Low Signal-to-Noise Ratio Measurements [PDF]

, 1999
We describe a modification of the usual definition of astronomical magnitudes, replacing the usual logarithm with an inverse hyperbolic sine function; we call these modified magnitudes `asinh magnitudes'. For objects detected at signal-to-noise ratios of
Alexander S. Szalay, James E. Gunn, Pogson N. R., Robert H. Lupton   +3 more
core   +3 more sources

An infinitesimally nonrigid polyhedron with nonstationary volume in the Lobachevsky 3-space

, 2011
We give an example of an infinitesimally nonrigid polyhedron in the Lobachevsky 3-space and construct an infinitesimal flex of that polyhedron such that the volume of the polyhedron isn't stationary under the flex.Comment: 10 pages, 2 Postscript ...
A. D. Alexandrov, A. D. Milka, D. A. Slutskiy, D. V. Alekseevskij, I. Kh. Sabitov, R. Alexander, R. Connelly, V. A. Alexandrov, V. Alexandrov, V. V. Prasolov   +9 more
core   +1 more source

Lengths of simple loops on surfaces with hyperbolic metrics

, 2002
Given a compact orientable surface of negative Euler characteristic, there exists a natural pairing between the Teichmueuller space of the surface and the set of homotopy classes of simple loops and arcs.
Beardon, Buser, Fathi, Feng Luo, Luo, Luo, Penner, Richard Stong, Thurston   +8 more
core   +3 more sources

The Ecological Impact of Place-Based Economic Policies [PDF]

, 2020
Does economic development have an unavoidable ecological cost? We examine the ecological impacts of one of India’s signature place-based economic policies involving massive tax benefits for new industrial and infrastructure development following the ...
Garg, Teevrat, Shenoy, Ajay
core  

Adaptaquin is selectively toxic to glioma stem cells through disruption of iron and cholesterol metabolism

Molecular Oncology, EarlyView.
Adaptaquin selectively kills glioma stem cells while sparing differentiated brain cells. Transcriptomic and proteomic analyses show Adaptaquin disrupts iron and cholesterol homeostasis, with iron chelation amplifying cytotoxicity via cholesterol depletion, mitochondrial dysfunction, and elevated reactive oxygen species.
Adrien M. Vaquié, Davod R. Shah, Eliane E. S. Brechbühl, Michael McNicholas, Zhaoyang Xu, John H. Stockley, Laura Morcom, Diana Gold Diaz, Gemma C. Girdler, Rachel V. Seear, Gabriel Balmus, Rajiv R. Ratan, Harry Bulstrode, James A. Nathan, Manav Pathania, Kevin M. Brindle, David H. Rowitch   +16 more
wiley   +1 more source

A deep learning approach: Physics-informed neural networks for solving the 2D nonlinear Sine–Gordon equation

Results in Applied Mathematics
In the current work, we apply a physics-informed neural networks (PINNs), a machine learning approach, for solving the non-linear hyperbolic sine–Gordon problem with two space dimensions.
Alemayehu Tamirie Deresse, Tamirat Temesgen Dufera   +1 more
doaj   +1 more source

Screening for lung cancer: A systematic review of overdiagnosis and its implications

Molecular Oncology, EarlyView.
Low‐dose computed tomography (CT) screening for lung cancer may increase overdiagnosis compared to no screening, though the risk is likely low versus chest X‐ray. Our review of 8 trials (84 660 participants) shows added costs. Further research with strict adherence to modern nodule management strategies may help determine the extent to which ...
Fiorella Karina Fernández‐Sáenz, Laura de la Torre‐Perez, David R Baldwin, Carlijn van der Aalst, Mangesh Thorat, David Ritchie, Andre L Carvalho, Carolina Espina, Ivan Solà, Carlos Canelo‐Aybar, Moira Magdalena Pissinis, Pablo Alonso‐Coello, Ana Carolina Pereira Nunes Pinto   +12 more
wiley   +1 more source

Ecosystems and human health: The local benefits of forest cover in Indonesia [PDF]

, 2019
This paper documents the effect of primary forest cover loss on increased incidence of malaria. The evidence is consistent with an ecological response. I show that land use change, anti-malarial programs or migration cannot explain the effect of primary ...
Garg, Teevrat
core   +1 more source