Results 91 to 100 of about 10,383,278 (335)
Classification of local conservation laws of Maxwell's equations [PDF]
Acta Applic. Math. 69/3 (2001) 285-327, 2001 A complete and explicit classification of all independent local conservation laws of Maxwell's equations in four dimensional Minkowski space is given. Besides the elementary linear conservation laws, and the well-known quadratic conservation laws associated to the conserved stress-energy and zilch tensors, there are also chiral quadratic conservation ...
arxiv
Advanced Engineering Materials, EarlyView.The study presents an efficient simulation approach for the polymer laser powder bed fusion process polymers process, validated with polyamide 12, polyamide 6, and polyetherketoneketone. It shows that inter layer time affects part density, with 90s yielding dense parts.
Claas Bierwisch +4 more
wiley +1 more source
Space as a New Category of Threats to National Security
Safety & Defense, 2019 The scientific considerations presented in this paper concern threats to national security arising from the activity in outer space. The objective of this analysis is to identify these dangers and to propose solutions to minimize them.
Radosław BIELAWSKI
doaj +1 more source
International-Legal Problem of Space Debris [PDF]
Advanced Space Law, 2018 The article deals with theoretical and practical legal aspects of the problem of man-made clogging of near-Earth space. The analysis shows that international space law does not cope with the current challenges and threats associated with man-made ...
Vasyl Semenyaka
doaj +1 more source
Thermodynamics in Higher Dimensional Vaidya Space-Time [PDF]
arXiv, 2012 In this work, we have considered the Vaidya spacetime in null radiating fluid with perfect fluid in higher dimension and have found the solution for barotropic fluid. We have shown that the Einstein's field equations can be obtained from Unified first law i.e., field equations and unified first law are equivalent.
arxiv
Jus Cogens Norms in International Space Law
, 2015 This paper is dedicated to the research of the concept of jus cogens norms in international space law. The author is proving existence of the peremptory norms in international space law by the global public interest of the international community in ...
Yevgeniya Oralova
semanticscholar +1 more source
Cosmological entropy and generalized second law of thermodynamics in $F(R,G)$ theory of gravity
, 2010 We consider a spatially flat Friedmann-Lemaitre-Robertson-Walker space time and investigate the second law and the generalized second law of thermodynamics for apparent horizon in generalized modified Gauss Bonnet theory of gravity (whose action contains
Cognola G. Sebastiani L. Zerbini S. +14 more
core +1 more source
Simulation of Inhomogeneous Refractive Index Fields Induced by Hot Tailored Forming Components
Advanced Engineering Materials, EarlyView.This article presents a simulation model for simulating inhomogeneous refractive index fields (IRIF) in hot‐forged components, accounting for thermal influences and complex geometries. Through this simulation, a priori knowledge about the propagation of the IRIF can be obtained, allowing for the positioning of the component or an optical measurement ...
Pascal Kern +3 more
wiley +1 more source
Conservation laws for the Cattaneo heat propagation [PDF]
arXiv, 2013 In this work we determine for the Cattaneo heat propagation system all the supplementary balance laws (conservation laws) of the same order (zero) as the system itself and extract the constitutive relations (expression for the internal energy) dictated by the Entropy Principle.
arxiv
THE PECULIAR EXTINCTION LAW OF SN 2014J MEASURED WITH THE HUBBLE SPACE TELESCOPE [PDF]
, 2014 The wavelength dependence of the extinction of Type Ia SN 2014J in the nearby galaxy M82 has been measured using UV to near-IR photometry obtained with the Hubble Space Telescope, the Nordic Optical Telescope, and the Mount Abu Infrared Telescope.
R. Amanullah +13 more
semanticscholar +1 more source