Results 141 to 150 of about 1,584,853 (313)
Hamiltonian Equations of Motion of Quadratic Gravity
Fortschritte der PhysikAbstract The equations of motion of the Hamiltonian formulation of quadratic gravity are computed explicitly. This is the theory with the most general Lagrangian with terms of quadratic order in the curvature tensor (discarding the cosmological constant). The symbolic computational tool Cadabra is employed.
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Equations of Motion in Relativistic Gravity [PDF]
, 2015 Preface.- The New Mechanics of Myron Mathisson and its subsequent development.- Multipolar test body equations of motion in generalized gravity theories.- Energy-Momentum Tensors and Motion in Special Relativity.- Solutions of Mathisson-Papapetrou equations for highly relativistic spinning particles.- The MPD Equations in Analytic Perturbative Form ...
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Gravity for Dummies and Dummies for Gravity Equations [PDF]
This paper provides a minimalist derivation of the gravity equation and uses it to identify three common errors in the literature, what we call the gold, silver and bronze medal errors.
Daria Taglioni, Richard Baldwin
core
Advanced Materials Technologies, EarlyView.A combined experimental and simulation study of light‐responsive liquid crystal elastomer surfaces operating under physiological conditions is reported, demonstrating programmable and highly spatially controlled topography formation through bottom‐side photomask exposure. Our study establishes a foundation for dynamic, light‐responsive biosurfaces with
Ruth M. C. Verbroekken +4 more
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Tariff Elasticity in Korea’s Imports: A Structural Gravity Approach Using Micro-Level Data
East Asian Economic ReviewThis paper estimates Korea’s tariff elasticity using 2014 transaction-level customs data covering about 7.5 million import records from 230 exporters and 10,557 HS10 products. Using the structural gravity framework of Fontagné et al.
Juyoung Cheong, Yong Joon Jang
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A Gravity Tensor and Gauge Equations for Newtonian Dynamics [PDF]
AxiomsIt is revealed that the material derivative of a variable in gravity field is its directional derivative, from which and energy/complementary-energy conservations with exterior derivatives, two sets of gauge equations of Newton’s dynamic gravity field are derived, which has same mathematical structure with the gauge ones for the Maxwell equations in ...
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Modeling the International-Trade Network: A Gravity Approach [PDF]
This paper investigates whether the gravity model (GM) can explain the statistical properties of the International Trade Network (ITN). We fit data on international-trade flows with a GM specification using alternative fitting techniques and we employ GM
Giorgio Fagiolo, Marco Duenas
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Renormalization group flow of f(R)-gravity [PDF]
, 2008 We use the functional renormalization group equation for quantum gravity to construct a non-perturbative flow equation for modified gravity theories of the form $S = \int d^dx \sqrt{g} f(R)$.
Afd Theoretical Physics (ITF) +4 more
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A Cryopreservation‐Based Supply Chain Strategy for Extrusion Bioprinting in Space
Advanced Materials Technologies, EarlyView.Extrusion bioprinting on crewed space platforms requires a bioink that stays functional along the logistic chain. Here, cells and biomaterial ink travel separately, the cells cryopreserved and the ink cold stored, and are combined only minutes before printing.
Johannes Windisch +7 more
wiley +1 more source
Non-perturbative effects in JT gravity from KdV equations
Journal of High Energy PhysicsIt is well-known that the partition function of the Jackiw-Teitelboim (JT) gravity is obtained by an integral transformation of volumes of moduli spaces for Riemann surfaces, also known as the Weil-Petersson volumes.
Yasuyuki Hatsuda +2 more
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