Results 91 to 100 of about 3,004,929 (256)
Modified theory of gravity and clustering of multi-component system of galaxies
European Physical Journal C: Particles and Fields, 2019 In this paper, we analyze the clustering of galaxies using a modified theory of gravity, in which the field content of general relativity has been be increased.
Mir Hameeda +5 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.This study examines Invar composites reinforced with titanium carbide (TiC) and titanium nitride (TiN) using laser powder bed fusion (LPBF). It presents the influence of reinforcements on microstructure, tensile properties, and thermal expansion. Results show that TiC effectively strengthens Invar while maintaining low thermal expansion, whereas TiN ...
Ayodeji Nathaniel Oyedeji +3 more
wiley +1 more source
The thermodynamics of optical étendue
, 2008 The concept of ´etendue is applied to the propagation of luminescent radiation, and to the transformation of such radiation in absorbing and luminescent media.
Markvart, T.
core +1 more source
On Equivalence of Nonequilibrium Thermodynamic and Statistical Entropies
Entropy, 2015 We review the concept of nonequilibrium thermodynamic entropy and observables and internal variables as state variables, introduced recently by us, and provide a simple first principle derivation of additive statistical entropy, applicable to all ...
Purushottam D. Gujrati
doaj +1 more source
Rapidly Solidified High‐Strength Invar 36 Prepared by Planar‐Flow Melt Spinning
Advanced Engineering Materials, EarlyView.The Invar 36 alloy was rapidly solidified using the planar‐flow melt‐spinning technique. Ribbon samples with thicknesses ranging from 20 to 160 mm were produced. As the grain size of the ribbon decreased to sub‐micron levels, the hardness increased by more than 2 times.
Bekir Akgül, Mehmet Kul
wiley +1 more source
A Minimal Dissipation Type-Based Classification in Irreversible Thermodynamics and Microeconomics [PDF]
We formulate the problem of finding classes of kinetic dependencies in irreversible thermodynamic and microeconomic systems for which minimal dissipation processes belong to the same type.
A. M. Tsirlin +2 more
core
Mechanical Proof of the Second Law of Thermodynamics Based on Volume Entropy [PDF]
, 2007 In a previous work (M. Campisi. Stud. Hist. Phil. M. P. 36 (2005) 275-290) we have addressed the mechanical foundations of equilibrium thermodynamics on the basis of the Generalized Helmholtz Theorem.
Campisi, Michele
core +1 more source
Advanced Engineering Materials, EarlyView.Gallium microalloying redirects interfacial reactions in low‐temperature Bi–Sn solders from Cu–Sn toward Cu–Ga intermetallic formation. The resulting Cu–Ga layer suppresses intermetallic growth during thermal aging, alters fracture pathways, and improves interfacial stability.
Iva Králová +6 more
wiley +1 more source
Thermodynamics at Very Long Time and Space Scales
, 2020 Any observation, and hence concept, is limited by the time and length scale of the observer and his instruments. Originally, we lived on a timescale of minutes and a length scale of meters, give or take an order of magnitude or two.
Essex, Christopher +3 more
core +1 more source
Investigating the Low‐Temperature Phase Stability of the Binary Ta–W System
Advanced Engineering Materials, EarlyView.Atomistic simulations show that the binary Ta–W system forms ordered intermetallic phases, B2‐TaW and D03‐TaW3, as 0 K ground states. Configurational entropy, however, lowers the free energy of the disordered bcc solid solution, which becomes the stable phase above about 400 K.
Klemens Lechner +7 more
wiley +1 more source