Results 111 to 120 of about 713,945 (299)

Fluxes in M-theory on 7-manifolds: G-structures and Superpotential

, 2003
We consider compactifications of M-theory on 7-manifolds in the presence of 4-form fluxes, which leave at least four supercharges unbroken. We focus especially on the case, where the 7-manifold supports two spinors which are SU(3) singlets and the fluxes
Andrianopoli, Awada, Beasley, Becker, Becker, Becker, Behrndt, Behrndt, Behrndt, Behrndt, Behrndt, Behrndt, Bergshoeff, Bilal, Brinne, Candelas, Cardoso, Cardoso, Cardoso, Ceresole, Chamseddine, Chiossi, Claus Jeschek, Curio, Cvetic, Dall'Agata, Dasgupta, de Wit, de Wit, Ferrara, Gauntlett, Gauntlett, Gauntlett, Grana, Grey, Gukov, Gurrieri, Husain, Kaste, Kaste, Klaus Behrndt, Lavrinenko, Louis, Lukas, Martelli, Polchinski, Strominger, Witten   +47 more
core   +1 more source

A Thermodynamic 3D Model for the Simulation of Diffusion‐Controlled Alloying Processes in Heterogeneous Material Structures

Advanced Engineering Materials, EarlyView.
A numerical model resulting from irreversible thermodynamics for describing transport processes is introduced, focusing on thermodynamic activity gradients as the actual driving force for diffusion. Implemented in CUDA C++ and using CalPhaD methods for determining the necessary activity data, the model accurately simulates interdiffusion in aluminum ...
Ulrich Holländer, Leonhard Holländer, André Langohr, Hans Jürgen Maier   +3 more
wiley   +1 more source

Toroidal Orientifolds in IIA with General NS-NS Fluxes

, 2007
Type IIA toroidal orientifolds offer a promising toolkit for model builders, especially when one includes not only the usual fluxes from NS-NS and R-R field strengths, but also fluxes that are T-dual to the NS-NS three-form flux.
A. Achucarro, A. Dabholkar, A. Dabholkar, A. Lawrence, A. Micu, A. Tomasiello, B.S. Acharya, C.M. Hull, C.M. Hull, C.M. Hull, C.M. Hull, C.M. Hull, C.M. Hull, C.P. Burgess, D. Lüst, Daniel Robbins, F. Marchesano, G. Aldazabal, G. Villadoro, I. Ellwood, I.T. Ellwood, J. Distler, J. Scherk, J. Shelton, J. Shelton, M. Cvetic, M. Graña, M. Graña, M. Gualtieri, M. Ihl, Matthias Ihl, N. Kaloper, O. DeWolfe, P. Bouwknegt, P. Bouwknegt, P.G. Camara, R. Blumenhagen, R. Blumenhagen, S. Hellerman, S. Kachru, S.L. Parameswaran, T. Banks, Timm Wrase, V. Mathai, V. Mathai   +44 more
core   +1 more source

Influence of Sample Preparation and Processing Procedures on the Thermal Diffusivity of MgO‐C Refractories

Advanced Engineering Materials, EarlyView.
The thermal diffusivity of MgO‐C refractories is highly sensitive to sample preparation and processing procedures. In this article, the effects of coking sequence, machining conditions, structural inhomogeneity, and graphite coating application on measurements using laser flash apparatus are systematically investigated.
Luyao Pan, Rhena Wulf, Till M. J. Stadtmüller, Christos G. Aneziris, Tobias M. Fieback   +4 more
wiley   +1 more source

An Evaluation of Short Term Greenhouse Gas Emissions from Soil and Atmosphere Exchange in Response to Controlling Edaphic Factgors of Eucalyptus Plantation, Gujarat, India

International Journal of Environment, 2014
A considerable amount of atmospheric GHG is produced and consumed through soil processes. Soils provide the largest terrestrial store for carbon (C) as well as the largest atmospheric CO2 sources through autotrophic and heterotrophic organisms. Soils are
Nirmal Kumar, JI Meghabarot, Priyakanchini Gupta, Kanti Patel   +3 more
doaj   +1 more source

Solar neutrino physics: Sensitivity to light dark matter particles

, 2012
Neutrinos are produced in several neutrino nuclear reactions of the proton-proton chain and carbon-nitrogen-oxygen cycle that take place at different radius of the Sun's core.
Lopes, Ilidio, Silk, Joseph
core   +2 more sources

Reduction of Oxide Inclusions During the High‐Frequency Welding of Steel via a Nonthermal Ar/H2 Plasma Jet

Advanced Engineering Materials, EarlyView.
High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin, Lienhard Wegewitz, René Gustus, Henning Wiche, Wolfgang Maus‐Friedrichs   +4 more
wiley   +1 more source

Charges and fluxes in Maxwell theory on compact manifolds with boundary

, 2003
We investigate the charges and fluxes that can occur in higher-order Abelian gauge theories defined on compact space-time manifolds with boundary. The boundary is necessary to supply a destination to the electric lines of force emanating from brane ...
A. Sen, A. Strominger, C. Montonen, C. Teitelboim, C. Teitelboim, C.W. Misner, D. Zwanziger, David I Olive, E. Cremmer, E. Cremmer, E. Verlinde, E. Witten, E. Witten, E. Witten, E. Witten, G. Moore, J. Figueroa-O’Farrill, J. Kalkkinen, J.S. Schwinger, M. Alvarez, M. Alvarez, M. Henneaux, M. Kalb, Marcos Alvarez, O. Alvarez, P. Orland, P.A.M. Dirac, R. Bott, R. Nepomechie, R. Sorkin, R. Sorkin, R. Zucchini, S. Deser, T. Diemer, T.T. Wu, W.V.D. Hodge   +35 more
core   +1 more source

Handbook of Establishing and Maintaining Oxygen‐Free Atmospheres

Advanced Engineering Materials, EarlyView.
This study presents a practical framework for creating oxygen‐free atmospheres at ambient pressure using silane‐doped inert gases. The results show that ultra‐low oxygen levels and strongly reduced water content can be achieved through controlled silane dosing, drying systems, and sensor monitoring.
Sascha Jan Zimmermann, René Gustus, Lienhard Wegewitz, Wolfgang Maus‐Friedrichs   +3 more
wiley   +1 more source

Oxide‐Free Titanium Coatings by Wire Arc Spraying in a Silane‐Doped Inert Atmosphere

Advanced Engineering Materials, EarlyView.
A silane‐doped argon atmosphere enables the production of oxide‐free titanium coatings via twin‐wire arc spraying at ambient pressure. This innovative approach eliminates residual oxygen, creating process conditions that prevent oxidation and nitride formation.
Manuel Rodriguez Diaz, Maik Szafarska, René Gustus, Kai Möhwald, Hans Jürgen Maier   +4 more
wiley   +1 more source