Results 291 to 300 of about 1,266,742 (341)
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Applied Mathematics & Optimization, 2001
In this paper a two-dimensional model for brittle thin films is obtained from a three-dimensional fracture model for elastic material. Using methods of \(\Gamma\)-convergence with adaptations to the spaces of special functions of bounded variation and to the thin films framework the authors find the limit effective energy as the thickness of the ...
Braides, A., Fonseca, I.
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In this paper a two-dimensional model for brittle thin films is obtained from a three-dimensional fracture model for elastic material. Using methods of \(\Gamma\)-convergence with adaptations to the spaces of special functions of bounded variation and to the thin films framework the authors find the limit effective energy as the thickness of the ...
Braides, A., Fonseca, I.
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Analytical Chemistry, 2003
The properties of a thin sheet of poly(dimethylsiloxane) (PDMS) membrane as an extraction phase were examined and compared to solid-phase microextraction (SPME) PDMS-coated fiber for application to semivolatile analytes in direct and headspace modes.
Inge, Bruheim +2 more
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The properties of a thin sheet of poly(dimethylsiloxane) (PDMS) membrane as an extraction phase were examined and compared to solid-phase microextraction (SPME) PDMS-coated fiber for application to semivolatile analytes in direct and headspace modes.
Inge, Bruheim +2 more
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Physical Review, 1951
The magnetic properties of thin films of ferromagnetic materials have been studied by means of the Bloch spin-wave theory. The spontaneous magnetization depends upon the number of atomic layers, ${G}_{z}$, in the film. For thicknesses below a "critical" thickness, which depends on the temperature and film dimensions, the spontaneous magnetization ...
Klein, Martin J., Smith, Robert S.
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The magnetic properties of thin films of ferromagnetic materials have been studied by means of the Bloch spin-wave theory. The spontaneous magnetization depends upon the number of atomic layers, ${G}_{z}$, in the film. For thicknesses below a "critical" thickness, which depends on the temperature and film dimensions, the spontaneous magnetization ...
Klein, Martin J., Smith, Robert S.
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Applied Optics, 1972
Viene dimostrato per la prima volta il funzionamento di una lente geodetica ottica, costituita da un film di resina epossidica depositato su una sfera di vetro ottico.
GC RIGHINI +3 more
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Viene dimostrato per la prima volta il funzionamento di una lente geodetica ottica, costituita da un film di resina epossidica depositato su una sfera di vetro ottico.
GC RIGHINI +3 more
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Electronics and Power, 1969
In recent years, new knowledge of the solid state and the scientific study of surfaces and interfaces have resulted in a rapid development of the thin-film field-effect transistor. The t.f.t. can be formed on inexpensive substrates, such as glass and paper, and its future could lie in its use as a really cheap device of moderate performance, made with ...
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In recent years, new knowledge of the solid state and the scientific study of surfaces and interfaces have resulted in a rapid development of the thin-film field-effect transistor. The t.f.t. can be formed on inexpensive substrates, such as glass and paper, and its future could lie in its use as a really cheap device of moderate performance, made with ...
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Journal of Chromatography A, 1964
Abstract Freeze-drying as a means of overcoming the zone-migration that occurs during drying of thin-film electropherograms at elevated temperatures is described and recommended.
W.J. Criddle, G.J. Moody, J.D.R. Thomas
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Abstract Freeze-drying as a means of overcoming the zone-migration that occurs during drying of thin-film electropherograms at elevated temperatures is described and recommended.
W.J. Criddle, G.J. Moody, J.D.R. Thomas
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Metallosupramolecular Thin Polyelectrolyte Films
Angewandte Chemie International Edition, 1998Molecular recognition and electrostatic interaction of oppositely charged polyelectrolytes are combined in the fabrication of ultrathin metallosupramolecular multilayers [shown schematically in the picture, PEI=polyethyleneimine, PSS=poly(styrene sulfonate)].
Schütte, M. +4 more
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1977
Publisher Summary This chapter discusses the thin film dialysis with respect to theory, experimental methods, applications in preparative and analytical work, and the future of the technique. If a solution is dialyzed, its components are subjected to separation processes that are based upon differential diffusion rates through a semipermeable ...
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Publisher Summary This chapter discusses the thin film dialysis with respect to theory, experimental methods, applications in preparative and analytical work, and the future of the technique. If a solution is dialyzed, its components are subjected to separation processes that are based upon differential diffusion rates through a semipermeable ...
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IRE Transactions on Electronic Computers, 1959
A small random-access memory using deposited magnetic thin films as storage elements, and with a cycle time of one microsecond, is described. Information is read from or written into the memory by linear or word selection techniques. The addressing, driving and sensing circuits are transistorized.
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A small random-access memory using deposited magnetic thin films as storage elements, and with a cycle time of one microsecond, is described. Information is read from or written into the memory by linear or word selection techniques. The addressing, driving and sensing circuits are transistorized.
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Ferroelectric Thin Films and Thin Film Devices
1993Research and development efforts on ferroelectric memories have been underway since about 1955. The early work, largely at IBM, RCA, Bell Telephone Laboratories and other US industrial laboratories was stymied by two problems: Firstly, the materials were too thick to permit operation at 5 V, the standard “TTL” or “CMOS” operating voltages in the ...
J. F. Scott +2 more
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