Results 31 to 40 of about 949,984 (294)

On phantom thermodynamics [PDF]

open access: yesPhysics Letters B, 2008
The thermodynamic properties of dark energy fluids described by an equation of state parameter $ω=p/ρ$ are rediscussed in the context of FRW type geometries. Contrarily to previous claims, it is argued here that the phantom regime $ω0$ and $S>0$ in the course of the Universe expansion.
Pereira, S. H., Lima, J. A. S.
openaire   +2 more sources

Heterogeneous rock mass detection in the Goaf underlying the Yingbin substation

open access: yesFrontiers in Earth Science, 2022
The existence of heterogeneous rock mass in the goaf easily causes surface deformation, subsidence, and even collapse, which restricts the development of urbanization of the buildings above the goaf. Because of the saturation of the city and the shortage
Jianjun Dong   +7 more
doaj   +1 more source

Correspondence of phase transition points and singularities of thermodynamic geometry of black holes [PDF]

open access: yes, 2013
We explore a formulation of thermodynamic geometry of black holes and prove that the divergent points of the specific heat correspond exactly to the singularities of the thermodynamic curvature.
Mansoori, Seyed Ali Hosseini   +1 more
core   +2 more sources

Multiple regression method for working face mining pressure prediction based on hydraulic support monitoring dataset

open access: yesFrontiers in Earth Science, 2023
Introduction: In the coal mining process, the intense mining pressure is an important factor hindering the safe and efficient production of the working face.
Jianjun Dong   +7 more
doaj   +1 more source

Applying Neural Network Model for Adsorption Methyl Paraben (MP) Dye Using Ricinus Communis-capeed Fe3O4 NPs Synthesized from Aqueous Solution [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2022
The applicability of the synthesized Ricinus Communis-capeed Fe3O4NPs as a novel adsorbent for eliminating Methyl Paraben (MP) from aqueous media was investigated.
Farzaneh Marahel   +4 more
doaj   +1 more source

Thermodynamic holography [PDF]

open access: yesScientific Reports, 2015
AbstractThe holographic principle states that the information about a volume of a system is encoded on the boundary surface of the volume. Holography appears in many branches of physics, such as optics, electromagnetism, many-body physics, quantum gravity and string theory. Here we show that holography is also an underlying principle in thermodynamics,
Bo-Bo Wei, Zhan-Feng Jiang, Ren-Bao Liu
openaire   +3 more sources

Comparing Charging Management Strategies for a Charging Station in a Parking Area in North Italy

open access: yesFuture Transportation, 2023
Via the analysis of a set of parking and journey information for vehicles traveling to the parking site at the University of Brescia (Italy), we evaluated the possibility of managing the electric recharging of these vehicles, which are hypothesized to be
Natascia Andrenacci   +2 more
doaj   +1 more source

Polyacrylamide Gel Polymer as Water Shut-off System: Preparation and Investigation of Physical and Chemical Properties in One of the Iranian Oil Reservoirs Conditions [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2007
In this paper, polyacrylamide/chromium acetate gel polymer system was prepared as water shut-off system to control water production in one of the Iranian oil reservoirs condition.
Mohammad Simjoo   +4 more
doaj  

Dust removal characteristics of a supersonic antigravity siphon atomization nozzle

open access: yesAdvances in Mechanical Engineering, 2020
To improve the trapping efficiency of respiratory dust by aerodynamic atomization, reduce the energy consumption and the requirements for the working conditions of nozzles and maintain the health and safety of workers, a comparative experiment evaluating
Tian Zhang   +5 more
doaj   +1 more source

Transition of amorphous to crystalline oxide film in initial oxide overgrowth on liquid metals [PDF]

open access: yes, 2011
It is important to understand the mechanism of oxidation in the initial stage on the free surface of liquid metals. Mittemeijer and co-workers recently developed a thermodynamic model to study the oxide overgrowth on a solid metal surface.
Antonow GN   +7 more
core   +1 more source

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