Results 61 to 70 of about 1,801,142 (276)

Long-term continuous monitoring of methane emissions at an oil and gas facility using a multi-open-path laser dispersion spectrometer

Scientific Reports
A method for methane emissions monitoring at industrial facility level was developed based on a high precision multi-open-path laser dispersion spectrometer combined with Bayesian analysis algorithms using Monte Carlo Markov Chain (MCMC) inference.
Rutger IJzermans, Matthew Jones, Damien Weidmann, Bas van de Kerkhof, David Randell   +4 more
doaj   +1 more source

Tribological Bench and Engine Dynamometer Tests of a Low Viscosity SAE 0W-16 Engine Oil Using a Combination of Ionic Liquid and ZDDP as Anti-wear Additives

Frontiers in Mechanical Engineering, 2015
We have previously reported an oil-miscible phosphonium-organophosphate ionic liquid (IL) with effective anti-wear functionality when added to a base oil by itself or combined with a conventional zinc dialkyldithiophosphate (ZDDP) for a synergistic ...
William C Barnhill, William C Barnhill, Hong eGao, Bassem A. Kheireddin, Brian L Papke, Huimin eLuo, Brian H West, Jun eQu   +7 more
doaj   +1 more source

The fragmentation of expanding shells II: Thickness matters

, 2010
We study analytically the development of gravitational instability in an expanding shell having finite thickness. We consider three models for the radial density profile of the shell: (i) an analytic uniform-density model, (ii) a semi-analytic model ...
A. P. Whitworth, Boyd, Churchwell, Churchwell, Dale, Dawson, Deharveng, Deharveng, Deharveng, Deharveng, Deharveng, Ehlerová, Elmegreen, Elmegreen, Elmegreen, Fukui, Haffner, Hatzidimitriou, J. E. Dale, J. Palouš, Kim, McClure-Griffiths, R. Wünsch, Vishniac, Watson, Watson, Whitworth, Whitworth, Wünsch, Zavagno   +29 more
core   +1 more source

Hamiltonian spacetime dynamics with a spherical null-dust shell [PDF]

, 1997
We consider the Hamiltonian dynamics of spherically symmetric Einstein gravity with a thin null-dust shell, under boundary conditions that fix the evolution of the spatial hypersurfaces at the two asymptotically flat infinities of a Kruskal-like manifold.
Friedman, John L., Louko, Jorma, Whiting, Bernard F.   +2 more
core   +4 more sources

Enabling Digital Continuity in Virtual Manufacturing for Eco‐Efficiency Assessment of Lightweight Structures by Means of a Domain‐Specific Structural Mechanics Language: Requirements, Idea and Proof of Concept

Advanced Engineering Materials, EarlyView.
This article presents a solver‐agnostic domain‐specific language (DSL) for computational structural mechanics that strengthens interoperability in virtual product development. Using a hierarchical data model, the DSL enables seamless exchange between diverse simulation tools and numerical methods.
Martin Rädel, Andreas Schuster, Felix Schoenitz, Jean Lefèvre   +3 more
wiley   +1 more source

Shell Middens and Shells

Abstract This chapter deals with the variability of anthropogenic shell deposits usually called shell middens and the different uses of molluscs during the Mesolithic in Europe. We present the geographical distribution and environmental setting of these emblematic archaeological sites, as well as their settlement patterns and their roles
Dupont, Catherine, Gutiérrez-Zugasti, Igor   +1 more
openaire   +2 more sources

Gravitational hedgehog, stringy hedgehog and stringy sphere

, 2003
We investigate the solutions of Einstein equations such that a hedgehog solution is matched to different exterior or interior solutions via a spherical shell.
A. Lichnerowicz, A. Papapetrou, A. Vilenkin, A. Vilenkin, A. Vilenkin, A.H. Taub, B. Linet, D. Harari, D. Tsoubelis, D.D. Sokolov, E. Arik, E.I. Guendelman, G. Arreaga, G. Clément, G. Darmois, I. Cho, J. Frauendiener, J.P. Krisch, J.R. Gott, J.S. Dowker, M. Aryal, M. Barriola, M.G. Ivanov, O. Delice, Ozgur Delice, P.S. Letelier, P.S. Letelier, R. Mansouri, S.W. Hawking, T.W.B. Kibble, U. Nucamendi, U. Nucamendi, V.P. Frolov, V.P. Frolov, W. Israel, W. Israel, W.A. Hiscock, X. Shi   +37 more
core   +1 more source

GS100-02-41: a new large HI shell in the outer part of the Galaxy [PDF]

, 2011
Massive stars have a profound effect on the surrounding interstellar medium. They ionize and heat the neutral gas, and due to their strong winds, they swept the gas up forming large HI shells.
Arnal, Bohlin, Brand, Cappa, Cazzolato, Chakraborti, Chu, Cichowolski, Cichowolski, Cichowolski, Crowther, Dobashi, E. M. Arnal, Ehlerová, Fich, Fürst, Garmany, Georgelin, Heiles, Heiles, Hiltner, J. C. Testori, Jung, Kalberla, Kerton, Könyves, L. A. Suad, Landecker, Martins, McClure-Griffiths, McCray, Mel’ Nik, Miville-Deschênes, Neckel, Oey, Patel, Perna, Pineault, Price, Quireza, Reed, Reich, Reich, Reynolds, S. Cichowolski, Schaerer, Schaller, Sofue, Sota, Stil, Taylor, Taylor, Taylor, Tenorio-Tagle, Uyaniker, Vasquez, Weaver, White   +57 more
core   +3 more sources

Effects of Carbon Nanoparticles on Triboelectro‐Induced Surface Defects

Advanced Engineering Materials, EarlyView.
Carbon nanoparticles added to grease modify the electrocontact behavior. The synergy of particle concentration and electric current dominates the surface damage of metals in contact. Electrical surface damage caused by current leakage is a critical challenge in high‐performance applications such as electric vehicle (EV) drivetrains and wind turbine ...
Mohsen Tajedini, Lu Fang, Jacob Bons, Mohammad Humaun Kabir, Evan Johnson, Joe Kosmoski, Hong Liang   +6 more
wiley   +1 more source

Hybrid Auxetic Architectures: Integrating Curvature‐Driven Design for Enhanced Mechanical Tunability and Structural Performance

Advanced Engineering Materials, EarlyView.
Curvature‐tuned auxetic lattices are designed, fabricated, and mechanically characterized to reveal how geometric curvature governs stretchability, stress redistribution, and Poisson's ratio evolution. Photoelastic experiments visualize stress pathways, while hyperelastic simulations quantify deformation mechanics.
Shuvodeep De, Giovanni Meli, Meysam Khalighian, Anahita Emami   +3 more
wiley   +1 more source