Results 121 to 130 of about 10,383,278 (335)

Domestic Legal Conditions for Space Activities in Asia

AJIL Unbound, 2019
This essay compares the national space legislation of China, Japan, and the Republic of Korea (ROK), outlining the reasons behind the legislation and then explaining what it authorizes, the jurisdiction it asserts, and the conditions it imposes on ...
Setsuko Aoki
doaj   +1 more source

Solving 1D Conservation Laws Using Pontryagin's Minimum Principle [PDF]

arXiv, 2016
This paper discusses a connection between scalar convex conservation laws and Pontryagin's minimum principle. For flux functions for which an associated optimal control problem can be found, a minimum value solution of the conservation law is proposed.
arxiv  

Understanding Zipf's law of word frequencies through sample-space collapse in sentence formation

, 2015
The formation of sentences is a highly structured and history-dependent process. The probability of using a specific word in a sentence strongly depends on the 'history' of word-usage earlier in that sentence. We study a simple history-dependent model of
Corominas-Murtra, Bernat, Hanel, Rudolf, Liu, Bo, Thurner, Stefan   +3 more
core   +1 more source

Beyond Order: Perspectives on Leveraging Machine Learning for Disordered Materials

Advanced Engineering Materials, EarlyView.
This article explores how machine learning (ML) revolutionizes the study and design of disordered materials by uncovering hidden patterns, predicting properties, and optimizing multiscale structures. It highlights key advancements, including generative models, graph neural networks, and hybrid ML‐physics methods, addressing challenges like data ...
Hamidreza Yazdani Sarvestani, Surabhi Nadigotti, Erfan Fatehi, Derek Aranguren van Egmond, Behnam Ashrafi   +4 more
wiley   +1 more source

The Architecture of Authority in Global Space Governance: The Moon Agreement as a Deconflicting Mechanism of Space Activities

Utrecht Law Review
Traditionally, the governance of outer space and the regulation of space activities have been State-centred. During the last decade, however, global space governance has been characterized by the influx of private space actors with the capacity to ...
Maria Manoli
doaj   +1 more source

Scalar Field Probes of Power-Law Space-Time Singularities

, 2006
We analyse the effective potential of the scalar wave equation near generic space-time singularities of power-law type (Szekeres-Iyer metrics) and show that the effective potential exhibits a universal and scale invariant leading x^{-2} inverse square ...
A. Giveon, A. Ishibashi, A. Ishibashi, A. van Keviczky, D.A. Konkowski, Denis Frank, G. Papadopoulos, G. Papadopoulos, I. Seggev, J.G. Stalker, K. Kirsten, M. Blau, M. Blau, M. Blau, M. Blau, M. Reed, M. Reed, Matthias Blau, S. Das, S. Hawking, Sebastian Weiss, T. Damour, V. de Alfaro, V.A. Belinsky, V.A. Belinsky   +24 more
core   +1 more source

On the Rigidity and Mechanical Behavior of Triply Periodic Minimal Surfaces‐Based Lattices: Insights from Extensive Experiments and Simulations

Advanced Engineering Materials, EarlyView.
This study examines the mechanical properties of triply periodic minimal surfaces (TPMS)‐based lattices, analyzing 36 architectures in elastic and plastic regimes. It evaluates the applicability of beam‐based scaling laws to TPMS lattices. Rigidity arises from the alignment of members with the load direction and solid regions preventing rotation.
Lucía Doyle, Humberto Terrones, Carlos González   +2 more
wiley   +1 more source

Noether conservation laws in classical mechanics [PDF]

arXiv, 2003
In Lagrangian mechanics, Noether conservation laws including the energy one are obtained similarly to those in field theory. In Hamiltonian mechanics, Noether conservation laws are issued from the invariance of the Poincare-Cartan integral invariant under one-parameter groups of diffeomorphisms of a configuration space.
arxiv  

Fourth order quasi-compact difference schemes for (tempered) space fractional diffusion equations [PDF]

, 2014
The continuous time random walk (CTRW) underlies many fundamental processes in non-equilibrium statistical physics. When the jump length of CTRW obeys a power-law distribution, its corresponding Fokker-Planck equation has space fractional derivative ...
Deng, Weihua, Wu, Yujiang, Yu, Yanyan
core  

An Examination of Aerosol Jet‐Printed Surface Roughness and its Impact on the Performance of High‐Frequency Electronics

Advanced Engineering Materials, EarlyView.
This study explores aerosol jet‐printed (AJP) surface roughness, its effects on the performance of microwave electronics, and its process contributors. First, an electromagnetic model is vetted for AJP's unique roughness signature. Simulations are built which show process‐induced roughness is as significant as conductor resistivity in driving microwave
Christopher Areias, Alkim Akyurtlu
wiley   +1 more source