Results 81 to 90 of about 126,370 (292)

Relativistic supersymmetric quantum mechanics based on Klein-Gordon equation

, 2004
Witten's non-relativistic formalism of supersymmetric quantum mechanics was based on a factorization and partnership between Schroedinger equations. We show how it accommodates a transition to the partnership between relativistic Klein-Gordon equations ...
, Azizov T Ya, Basu-Mallick B, Bender C M, Bender C M, Bender C M, Bender C M, Bernard C, Bessis D, Buslaev V, Caliceti E, Caliceti E, Chen J L, Dirac P A M, Dorey P, Dorey P, Fei S-M, Fernández F M, Fernández F M, Feshbach H, Geyer H B, Handy C R, Heiss W D, Ince E L, Infeld L, Jakubský V, Kretschmer R, Levai G, Levai G, Lévai G, Miloslav Znojil, Milton K A, Mostafazadeh A, Mostafazadeh A, Mostafazadeh A, Mostafazadeh A, Nanayakkara A, Nieto L M, Pauli W, Ramirez A, Robnik M, Scholtz F G, Schrödinger E, Scolarici G, Sinha A, Snyman I, Stahlhofen A, Tkachuk V M, Wang Q, Weigert S, Znojil M, Znojil M, Znojil M, Znojil M, Znojil M, Znojil M, Znojil M   +56 more
core   +1 more source

Effect of Oxygen Content on Surface and Subsurface Integrity During Turning of Ti–6Al–4V

Advanced Engineering Materials, EarlyView.
This study examines how oxygen content in the ambient atmosphere affects the surface and subsurface properties of Ti–6Al–4V during turning. Results show that oxygen does not influence surface roughness. However, machining in an extremely high vacuum‐adequate atmosphere increases surface hardness by up to 7.8% and induces compressive residual stresses ...
Benjamin Bergmann, Berend Denkena, Hilke Petersen, Florian Schaper   +3 more
wiley   +1 more source

Finite-Element Time Evolution Operator for the Anharmonic Oscillator [PDF]

, 1994
The finite-element approach to lattice field theory is both highly accurate (relative errors $\sim1/N^2$, where $N$ is the number of lattice points) and exactly unitary (in the sense that canonical commutation relations are exactly preserved at the ...
Milton, Kimball A.
core   +2 more sources

The Stellar Population Histories of Early-Type Galaxies. II. Controlling Parameters of the Stellar Populations

, 2000
We analyze single-stellar-population (SSP) equivalent parameters for 50 local elliptical galaxies as a function of their structural parameters. These galaxies fill a two-dimensional plane in the four-dimensional space of [Z/H], log t, log $\sigma$, and ...
Arimoto N., Bender R., Caon N., Goudfrooij P., Greggio L., Guy Worthey, Guzman R., J. Jesús González, Jorgensen I., Kauffmann G., Larson R. B., Peletier R. F., Poulain P., Poulain P., Prugniel P., S. C. Trager, S. M. Faber, Salaris M., Tantalo R., Tantalo R., Tinsley B. M.   +20 more
core   +2 more sources

Near‐Field Electrospinning Micro‐Printhead Achieves Precise Control of Nanofiber Deposition

Advanced Engineering Materials, EarlyView.
A micro‐printhead for near‐field electrospinning enables reproducible deposition of polymer nanofibers with diameters below 50 nm. Systematic parameter studies uncover the mechanisms linking operating conditions to fiber morphology, paving the way for precise and low‐cost nanoscale 3D manufacturing.As a high‐resolution, cost‐effective, and rapid ...
Han Xu, Dario Mager, Jan G. Korvink
wiley   +1 more source

Soil disturbance evaluation of soft clay based on stress-normalized small-strain stiffness

Journal of Rock Mechanics and Geotechnical Engineering
Soil disturbance includes the change of stress state and the damage of soil structure. The field testing indices reflect the combined effect of both changes and it is difficult to identify the soil structure disturbance directly from these indices.
Yanguo Zhou, Yu Tian, Junneng Ye, Xuecheng Bian, Yunmin Chen   +4 more
doaj   +1 more source

The Lower Triassic platy limestone in the Jajce area (Bosnia and Herzegovina)

Geologija, 2014
The study presents palaeontological and sedimentological data of the Lower Triassic strata of the Jajce area in Bosnia and Herzegovina. Four microfacies types were differentiated: coarse grained bioclastic packstones, fine grained bioclastic packstones,
Tea Kolar-Jurkovšek, Bogdan Jurkovšek, Valery Ja. Vuks, Hazim Hrvatović, Dunja Aljinović, Ćazim Šarić, Ferid Skopljak   +6 more
doaj   +1 more source

Overcritical PT-symmetric square well potential in the Dirac equation

, 2007
We study scattering properties of a PT-symmetric square well potential with real depth larger than the threshold of particle-antiparticle pair production as the time component of a vector potential in the (1+1)-dimensional Dirac equation.Comment: 11 ...
Ahmed, Alberto Ventura, Bender, Bender, Bender, Bender, Bender, Bender, Bender, Bender, Bender, Caliceti, Cannata, Cannata, de Castro, Domínguez-Adame, Ergrifes, Francesco Cannata, Greiner, Jia, Jones, Kennedy, McKellar, Mostafazadeh, Mostafazadeh, Mostafazadeh, Scholtz, Sinha, Villalba, Znojil, Znojil   +30 more
core   +2 more sources

Construction of a unique metric in quasi-Hermitian quantum mechanics: non-existence of the charge operator in a 2 x 2 matrix model [PDF]

, 2006
For a specific exactly solvable 2 by 2 matrix model with a PT-symmetric Hamiltonian possessing a real spectrum, we construct all the eligible physical metrics and show that none of them admits a factorization CP in terms of an involutive charge operator ...
Albeverio, Andrianov, Bagchi, Bagchi, Bender, Bender, Bender, Bender, Bender, Bender, Bender, Bender, Bíla, Dorey, Fernández, Hendrik B. Geyer, Jakubský, Jones, Langer, Langer, Lévai, Miloslav Znojil, Mostafazadeh, Mostafazadeh, Mostafazadeh, Mostafazadeh, Mostafazadeh, Mostafazadeh, Mostafazadeh, Scholtz, Scholtz, Shin, Sinha, Znojil, Znojil, Znojil, Znojil, Znojil, Znojil, Znojil, Znojil, Znojil, Znojil   +42 more
core   +2 more sources

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source