World Library  

 
  • Cover Image

Journal of Applied Physics : Optically driven fluid flow along arb...

By: Franz M. Weinert and Dieter Braun

Description: We show how fluid can be moved by a laser scanning microscope. Selected parts of a fluid film are pumped along the path of a moving warm spot which is generated by the repetitive motion of an infrared laser focus. With this technique, we remotely drive arbitrary two-dimensional fluid flow patterns with a resolution of 2 μm. Pump speeds of 150 μm/s are reached in water with a maximal temperature increase in the local spot of 10 K. Various experiments confirm ...

Read More
  • Cover Image

Biblioteca Hispanica : Curiosities Natural and Social Character of...

By: Joseph Jordana and Morera
Read More
  • Cover Image

Journal of Applied Physics : Decomposition of methylene blue in wa...

By: Monica Magureanu, Daniela Piroi, Nicolae Bogdan Mandache, and Vasile Parvulescu

Description: The decomposition of methylene blue (MB) in aqueous solution was investigated using a dielectric barrier discharge in coaxial configuration operated in pulsed regime. The MB solution (volume = 300 ml, concentration = 50 mg/l) contained in a reservoir was circulated by a pump and made to flow as a film over the surface of the inner electrode of the plasma reactor. The best results were obtained when the discharge was operated in oxygen. The conversion of MB r...

Read More
  • Cover Image

Physics of Plasmas : Theory and simulation of lower-hybrid drift i...

By: P. H. Yoon, Y. Lin, X. Y. Wang, and A. T. Y. Lui

Description: The stability of a thin current sheet with a finite guide field is investigated in the weak guide-field limit by means of linear theory and simulation. The emphasis is placed on the lower-hybrid drift instability (LHDI) propagating along the current flow direction. Linear theory is compared against the two-dimensional linear simulation based on the gyrokinetic electron/fully kinetic ion code. LHDI is a flute mode characterized by k⋅Btotal = 0; hence, it is s...

Read More
  • Cover Image

Applied Physics Letters : Charge loss behavior of a metal-alumina-...

By: Man Chang, Minseok Jo, Seonghyun Kim, Yongkyu Ju, Seungjae Jung et al

Description: We found that the charge loss behavior of metal-alumina-nitride-oxide-silicon-type flash memory was highly dependent on the amount of injected charge (Qinj). Beyond the critical level of Qinj, the direction of the dominant charge loss changed from pointing toward SiO2 to pointing toward Al2O3. The highly injected charges could cause the band bending of Al2O3, which reduced the tunneling distance across Al2O3 with the low conduction band offset. These results...

Read More
  • Cover Image

Journal of Applied Physics : An atomistic-based correction of the ...

By: S. Rodríguez-Bolívar, F. M. Gómez-Campos, and J. E. Carceller

Description: In this work, we propose a correction to the effective mass approach (EMA) to be used in Si quantum dot simulations. This correction tries to connect the different ways of modeling quantum dots within tight binding (considering the actual positions of the atoms and using additional atoms to passivate the surfaces) with those within the EMA, adapting the size of the simulated quantum dots to take the difference into account. With this aim, we implemented a 6×...

Read More
  • Cover Image

Biblioteca Hispanica : New Elements of Natural History Illustrated...

By: Ignacio Bolivar
Read More
  • Cover Image

Applied Physics Letters : Experimental isolation of degradation me...

By: Z. Olszewski, R. Houlihan, C. Ryan, C. OMahony, and R. Duane

Description: DC and bipolar voltage stresses are used to isolate mechanical degradation of the movable electrode from charging mechanism in microelectromechanical capacitive switches. Switches with different metals as the movable electrode were investigated. In titanium switches, a shift in the pull-in voltages is observed after dc stressing whereas no shift occurs after the bipolar stressing, which is to be expected from charging theory. On switches with similar dielect...

Read More
  • Cover Image

Journal of Applied Physics : Effect of compensation and of metalli...

By: Joris Libal, Sara Novaglia, Maurizio Acciarri, Simona Binetti, Roman Petres et al

Description: In this work we present a study of a p-type Czochralski-grown Si ingot which was grown using 10% solar grade silicon (SoG-Si). As the SoG-Si contains a relatively high concentration of impurities including phosphorus, the electrical properties of the as-grown wafers from this ingot are affected by both the compensating dopants and other impurities. Measurements of the minority charge carrier lifetime in the as-grown material reveal very low values (4–8 μs). ...

Read More
  • Cover Image

Journal of Applied Physics : Tuning of oxidation states in the LaN...

By: Bruno Berini, Niels Keller, Benjamin Pigeau, Yves Dumont, Elena Popova et al

Description: The LaNiO3−δ perovskite has been studied during its reoxygenation process at the reversible insulator-metal transition by spectroscopic ellipsometry for different pressures and temperatures conditions. First, it was demonstrated that the reoxygenation dynamics increases with both increasing pressure and temperature. Considering the temperature dependent experiments, two regimes of kinetics have been identified: a slow reoxygenation dynamics at low temperatur...

Read More
  • Cover Image

Biblioteca Hispanica : Testing an Introduction to the Study of Nat...

By: Augusto G. Linares
Read More
  • Cover Image

Biblioteca Hispanica : Elementary Natural History for Use by Stude...

By: Salustiano Sotillo
Read More
  • Cover Image

Chaos : Synchronization-based scalability of complex clustered net...

By: Xiaojuan Ma, Liang Huang, Ying-Cheng Lai, Yan Wang, and Zhigang Zheng

Description: Complex clustered networks arise in biological, social, physical, and technological systems, and the synchronous dynamics on such networks have attracted recent interests. Here we investigate system-size dependence of the synchronizability of these networks. Theoretical analysis and numerical computations reveal that, for a typical clustered network, as its size is increased, the synchronizability can be maintained or even enhanced but at the expense of dete...

Read More
  • Cover Image

Journal of Applied Physics : Microwave dielectric and Raman scatte...

By: K. Sudheendran, K. C. James Raju, Manoj K. Singh, and Ram S. Katiyar

Description: Bismuth zinc niobate (Bi1.5Zn1.0Nb1.5O7) thin films were deposited on fused silica substrates by pulsed laser deposition. Its phase composition and microstructure were characterized by x-ray diffraction and atomic force microscopy. The as deposited films were amorphous and all of them were crystallized after a postdeposition annealing at 600 °C for 30 min in air. The crystallite size of the films was found to be varying between 31 and 60 nm with respect to t...

Read More
  • Cover Image

Physics of Fluids : Boundary integral simulations of liquid emptyi...

By: Nazish Hoda and Satish Kumar

Description: We perform boundary integral simulations to understand the removal of Newtonian liquids from a model gravure cell. Two different configurations are considered. In the first configuration, there is a free surface and an outlet boundary, and the liquid is driven out of a cavity by a combination of horizontal substrate motion and an imposed pressure gradient; a similar model was used by Powell et al. [Trans. IChemeE, Part C 78, 61 (2000) ]. The percentage of li...

Read More
  • Cover Image

Review of Scientific Instruments : Digital control of force micros...

By: Jonathan P. Jacky, Joseph L. Garbini, Matthew Ettus, and John A. Sidles
Read More
  • Cover Image

Physics of Plasmas : On nonlinear evolution of Alfvénic turbulence...

By: Y. Nariyuki, T. Hada, and K. Tsubouchi

Description: Nonlinear evolution of broadband spectrum Alfvénic turbulence is studied by using one-dimensional hybrid simulations. Numerical solutions indicate that the important characteristics in the solar wind magnetohydrodynamic (MHD) turbulence are naturally reproduced by nonlinear evolution of Alfvénic turbulence with more realistic power spectrum than one used in the past studies. Namely, (i) the modulational instability can dissipate the magnetic energy of Alfvén...

Read More
  • Cover Image

Chaos : Channel erosion due to subsurface flow

By: Braunen Smith, Arshad Kudrolli, Alexander E. Lobkovsky, and Daniel H. Rothman

Description:

Read More
  • Cover Image

Journal of Applied Physics : Equivalent magnetic charge in helicoi...

By: Roberto Muscia

Description: In this paper we show that magnetostatic models of permanent magnets, based on distributions of magnetic charge and shaped by a helicoidal geometry of cylindrical type, have the volume charge density ρM equal to zero. This result is valid when (i) the modulus of the vector physical magnetization density M has a constant value in all the points of the helicoidal magnet and (ii) M has the same direction of an oriented straight line having a constant angle with...

Read More
  • Cover Image

Applied Physics Letters : Multilevel sensitization of Er3+ in low-...

By: Oleksandr Savchyn, Ravi M. Todi, Kevin R. Coffey, and Pieter G. Kik

Description: The dynamics of Er3+ excitation in low-temperature-annealed Si-rich SiO2 are studied. It is demonstrated that Si-excess-related indirect excitation is fast (transfer time τtr<27 ns) and occurs into higher lying Er3+ levels as well as directly into the first excited state (4I13/2). By monitoring the time-dependent Er3+ emission at 1535 nm, the multilevel nature of the Er3+ sensitization is shown to result in two types of excitation of the 4I13/2 state: a fast...

Read More
 
1
|
2
|
3
Records: 1 - 20 of 45 - Pages: 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.