Results 41 to 50 of about 1,371,402 (184)

Quasi-Local Conservation Equations in General Relativity

, 2001
A set of exact quasi-local conservation equations is derived from the Einstein's equations using the first-order Kaluza-Klein formalism of general relativity in the (2,2)-splitting of 4-dimensional spacetime.
Bergqvist, Brown, Cho, d'Inverno, d'Inverno, de Felice, Hayward, Hayward, Jong Hyuk Yoon, Katz, Landau, Lynden-Bell, Misner, Nester, Newman, Newman, Szabados, Tamburino, Thorne, Wald, Yoon, Yoon, Yoon, Yoon   +23 more
core   +1 more source

Noether-Like Theorems for Causal Variational Principles [PDF]

, 2015
The connection between symmetries and conservation laws as made by Noether's theorem is extended to the context of causal variational principles and causal fermion systems. Different notions of continuous symmetries are introduced.
Finster, Felix, Kleiner, Johannes
core   +2 more sources

Techno-economic assessment of Bilacenge PV grid system in Southwest Sumba

Journal of Mechatronics, Electrical Power, and Vehicular Technology
A solar photovoltaic (PV) grid system with an Energy Management System (EMS) has been installed in Bilacenge, Southwest Sumba. This 400 kWp PV-Grid system is the first system in Indonesia that can control the electricity output to the grid.
Eka Nurdiana, Muhammad Very Nugroho, Zakariya Arif Fikriyadi, Fajril Mardiansah, Dwie Vannia Dianti, Dannya Maharani Putri Utami, Kholid Akhmad, Yusuf Margowadi, Arya Rezavidi   +8 more
doaj   +1 more source

Research on Cooperative Planning of Distributed Generation Access to AC/DC Distribution (Micro) Grids Based on Analytical Target Cascading

Energies, 2019
With the wide application of distributed generation (DG) and the rapid development of alternating current/direct current (AC/DC) hybrid microgrids, the optimal planning of distributed generation connecting to AC/DC distribution networks/microgrids has ...
Hao Pan, Ming Ding, Rui Bi, Lei Sun
doaj   +1 more source

Experimental Study on Mechanical Properties of Hydrate-Bearing Sand: The Influence of Sand-Water Mixing Methods

Energies, 2021
Laboratory-synthesized specimens are employed for an experimental study on the mechanical properties of hydrate-bearing sediments (HBS) due to the difficulty of field coring.
Weiguo Liu, Dedong Pan, Shi Shen, Zeshao You, Yuechao Zhao, Xiang Sun   +5 more
doaj   +1 more source

Energy Conservation as Security [PDF]

, 2006
"Energy security" is usually defined as the guarantee of a stable and reliable supply of energy at reasonable prices. However, this definition is often misleading because it equates oil supply as the primary focus of a country's energy security ...
Wang Qingyi
core  

Quasilocal Conservation Laws: Why We Need Them

, 2012
We argue that conservation laws based on the local matter-only stress-energy-momentum tensor (characterized by energy and momentum per unit volume) cannot adequately explain a wide variety of even very simple physical phenomena because they fail to ...
Bell J S, de Matos C J Tajmar M, Epp R J, Epp R J, Gaidukov G N, Mashhoon B, Misner C W, Paul L McGrath, Richard J Epp, Rindler W, Robert B Mann   +10 more
core   +1 more source

Energy study of a non-residential and historic building in transient conditions [PDF]

, 2015
The purpose of this manuscript is to analyse the interventions of energy retrofit of a non-residential and historic building, through dynamic simulation by the use of the TRNsys code.
GRIGNAFFINI, Stefano, ROMAGNA, MARCO, VALLATI, Andrea   +2 more
core   +2 more sources

Conservation of Energy is Relevant to Physicalism [PDF]

, 2007
I argue against Barbara Montero's claim that Conservation of Energy has nothing to do with physicalism. I reject her reconstruction of the argument for physicalism from CoE, and offer an alternative reconstruction that better captures the intuitions of ...
Koksvik, Ole
core   +2 more sources

Anisotropic thermal property characterizations and optical phonon contribution analysis of ZnO under high pressure

Journal of Materials Research and Technology, 2023
Zinc oxide (ZnO) is a wide band-gap semiconductor material with versatile applications in high-tech fields. Under high pressure, ZnO exhibits multiple phase transitions, which are of great significance for the development of photocatalysts, micro-devices
Xuanhui Fan, Zhongyin Zhang, Jing Zhou, Kunpeng Yuan, Jie Zhu, Dawei Tang   +5 more
doaj   +1 more source