Black Hole Mass Formula Is a Vanishing Noether Charge [PDF]
, 2002 The Noether current and its variation relation with respect to diffeomorphism invariance of gravitational theories have been derived from the horizontal variation and vertical-horizontal bi-variation of the Lagrangian, respectively.
Guo, Han-Ying +3 more
core +2 more sources
On a Yang-Mills Type Functional [PDF]
, 2019 We study a functional that derives from the classical Yang-Mills functional and Born-Infeld theory. We establish its first variation formula and prove the existence of critical points.
Gherghe, Cătălin
core +3 more sources
First constraint on cosmological variation of the proton-to-electron mass ratio from two independent telescopes [PDF]
, 2011 A high signal-to-noise spectrum covering the largest number of hydrogen lines (90 H2 lines and 6 HD lines) in a high redshift object was analyzed from an observation along the sight-line to the bright quasar source J2123$-$005 with the UVES spectrograph ...
A. L. Malec +6 more
core +3 more sources
Interacting Three Fluid System and Thermodynamics of the Universe Bounded by the Event Horizon [PDF]
, 2010 The work deals with the thermodynamics of the universe bounded by the event horizon. The matter in the universe has three constituents namely dark energy, dark matter and radiation in nature and interaction between then is assumed.
A.G. Riess +53 more
core +1 more source
Leaf nitrogen from first principles: field evidence for adaptive variation with climate [PDF]
Biogeosciences, 2017 Nitrogen content per unit leaf area (Narea) is a key variable in plant functional ecology and biogeochemistry. Narea comprises a structural component, which scales with leaf mass per area (LMA), and a metabolic component, which scales with Rubisco ...
N. Dong +5 more
doaj +1 more source
On the stability of high-speed milling with spindle speed variation [PDF]
, 2010 Spindle speed variation is a well-known technique to suppress regenerative machine tool vibrations, but it is usually considered to be effective only for low spindle speeds.
BP Mann +43 more
core +4 more sources
First record of humpback whale songs in Southern Chile: Analysis of seasonal and diel variation [PDF]
, 2018 Male humpback whales (Megaptera novaeangliae) produce complex, patterned songs that are traditionally recorded on their breeding grounds. In this work, we report results from the first continuous acoustic monitoring of a humpback whale feeding ground off
Acevedo +90 more
core +2 more sources
Exploiting microvariation: How to make the best of your incomplete data [PDF]
, 2018 n this article we discuss the use of big corpuses or databases as a first step for qualitative analysis of linguistic data. We concentrate on ASIt, the Syntactic Atlas of Italy, and take into consideration the different types of dialectal data that can ...
Garzonio, Jacopo, Poletto, Cecilia
core +1 more source
First and second variation formulae for the sub-Riemannian area in three-dimensional pseudo-hermitian manifolds [PDF]
, 2010 We calculate the first and the second variation formula for the sub-Riemannian area in three dimensional pseudo-hermitian manifolds. We consider general variations that can move the singular set of a C^2 surface and non-singular variation for C_H^2 ...
A. Hurtado +32 more
core +1 more source
Exploring the Variation in First Year Undergraduates' Induction into Their Academic Disciplines
International Journal for the Scholarship of Teaching and Learning, 2011 This study explored qualitative variation in first year undergraduates’ induction into the discipline in four dimensions: (1) induction into disciplinary knowledge, (2) induction into disciplinary research, (3) integration of learning from different ...
Min Yang +2 more
doaj +1 more source