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Articles 31 - 60 of 411
Full-Text Articles in Physics
Scientists At Cern Are Wrong About Faster Than Light Particles, Or They Are Being Misrepresented, Hontas Farmer
Scientists At Cern Are Wrong About Faster Than Light Particles, Or They Are Being Misrepresented, Hontas Farmer
Hontas F Farmer
The postulate of special relativity, which in common terms means that no particle can travel faster than the speed of light, has been tested and shown to be correct in literally billions of measurements. So the scientists at CERN who report measuring neutrino's moving faster than light are either WRONG or are being grossly misrepresented in many media outlets. Every other time a packet of particles collided with another packet of particles special relativity has been borne out. The experiment reported in many outlets, conducted at CERN, has been reported as "showing Einstein was wrong". I don't think so.
Spin And Exchange Coupling For Ti Embedded In A Surface Dipolar Network, Pushpa Raghani, Jesus Cruz, Barbara Jones
Spin And Exchange Coupling For Ti Embedded In A Surface Dipolar Network, Pushpa Raghani, Jesus Cruz, Barbara Jones
Pushpa Raghani
We have studied the spin and exchange coupling of Ti atoms deposited on a Cu2N/Cu(100) surface using density functional theory with generalized gradient approximation +U. In agreement with experiments, we find that Ti has the highest binding on top of Cu atoms. We also find that the spin of individual Ti atoms deposited on the Cu2N/Cu(100) surface increases as Ti coverage on the surface is decreased. For U=0, the spin of a Ti atom starts at S=0 at high coverages and increases to S=1/2 as the coverage is decreased, which agrees very well with results obtained from STM experiments. At …
X-Ray Scattering Study Of The Incommensurate Phase In Mg-Doped Cugeo3, Rebecca J. Christianson, Y. J. Wang, S.C. Lamarra, R. J. Birgeneau, V. Kiryukhin, T. Masuda, I. Tsukada, K. Uchinokura, B. Keimer
X-Ray Scattering Study Of The Incommensurate Phase In Mg-Doped Cugeo3, Rebecca J. Christianson, Y. J. Wang, S.C. Lamarra, R. J. Birgeneau, V. Kiryukhin, T. Masuda, I. Tsukada, K. Uchinokura, B. Keimer
Rebecca J. Christianson
We present results of a systematic x-ray scattering study of the effects of Mg doping on the high-fieldincommensurate phase of CuGeO3. Lorentzian-squared line shapes, the changing of the first-order transition tosecond order, and the destruction of long-range order with infinitesimal doping are observed, consistent withrandom-field effects in a three-dimensional XY system. Values for the soliton width in pure and lightly dopedCuGeO3 are deduced. We find that even a very small doping has a drastic effect on the shape of the latticemodulation.
Two-Magnon Excitations Observed By Neutron Scattering In The Two-Dimensional Spin-5/2 Heisenberg Antiferromagnet Rb2mnf4, T. Huberman, R. Coldea, R. A. Cowley, D. A. Tennant, R. L. Leheny, Rebecca Christianson, C. D. Frost
Two-Magnon Excitations Observed By Neutron Scattering In The Two-Dimensional Spin-5/2 Heisenberg Antiferromagnet Rb2mnf4, T. Huberman, R. Coldea, R. A. Cowley, D. A. Tennant, R. L. Leheny, Rebecca Christianson, C. D. Frost
Rebecca J. Christianson
The low-temperature magnetic excitations of the two-dimensional spin- 52 square-lattice Heisenberg antiferromagnetRb2MnF4 have been probed using pulsed inelastic neutron scattering. In addition to dominant sharppeaks identified with one-magnon excitations, a relatively weak continuum scattering is also observed at higherenergies. This is attributed to neutron scattering by pairs of magnons and the observed intensities are consistentwith predictions of spin wave theory.
Time-Dependent Strength Of Colloidal Gels, S. Manley, Benny Davidovitch, Neil R. Davies, L. Cipelletti, A. E. Bailey, Rebecca J. Christianson, U. Gasser, V. Prasad, P. N. Segre, M. P. Doherty, S. Sankaran, A. L. Jankovsky, B. Shiley, J. Bowen, J. Eggers, C. Kurta, T. Lorik, D. A. Weitz
Time-Dependent Strength Of Colloidal Gels, S. Manley, Benny Davidovitch, Neil R. Davies, L. Cipelletti, A. E. Bailey, Rebecca J. Christianson, U. Gasser, V. Prasad, P. N. Segre, M. P. Doherty, S. Sankaran, A. L. Jankovsky, B. Shiley, J. Bowen, J. Eggers, C. Kurta, T. Lorik, D. A. Weitz
Rebecca J. Christianson
Colloidal silica gels are shown to stiffen with time, as demonstrated by both dynamic light scattering and bulk rheological measurements. Their elastic moduli increase as a power law with time, independent of particle volume fraction; however, static light scattering indicates that there are no large-scale structural changes. We propose that increases in local elasticity arising from bonding between neighboring colloidal particles can account for the strengthening of the network, while preserving network structure.
Spinodal Decomposition In A Model Colloid-Polymer Mixture In Microgravity, A. E. Bailey, W. C. K. Poon, Rebecca J. Christianson, A. B. Schofield, U. Gasser, V. Prasad, S. Manley, P. N. Segre, L. Cipelletti, W. V. Meyer, M. P. Doherty, S. Sankaran, A. L. Jankovsky, W. L. Shiley, J. P. Bowen, J. C. Eggers, C. Kurta, T., Jr. Lorik, P. N. Pusey, D. A. Weitz
Spinodal Decomposition In A Model Colloid-Polymer Mixture In Microgravity, A. E. Bailey, W. C. K. Poon, Rebecca J. Christianson, A. B. Schofield, U. Gasser, V. Prasad, S. Manley, P. N. Segre, L. Cipelletti, W. V. Meyer, M. P. Doherty, S. Sankaran, A. L. Jankovsky, W. L. Shiley, J. P. Bowen, J. C. Eggers, C. Kurta, T., Jr. Lorik, P. N. Pusey, D. A. Weitz
Rebecca J. Christianson
We study phase separation in a deeply quenched colloid-polymer mixture in microgravity on the International Space Station using small-angle light scattering and direct imaging. We observe a clear crossover from early-stage spinodal decomposition to late-stage, interfacial-tension-driven coarsening. Data acquired over 5 orders of magnitude in time show more than 3 orders of magnitude increase in domain size, following nearly the same evolution as that in binary liquid mixtures. The late-stage growth approaches the expected linear growth rate quite slowly.
X-Ray Scattering Studies Of Two Length Scales In The Critical Fluctuations Of Cugeo3, Y. J. Wang, Y. J. Kim, Rebecca J. Christianson, S. C. Lamarra, F. C. Chou, R. J. Birgeneau
X-Ray Scattering Studies Of Two Length Scales In The Critical Fluctuations Of Cugeo3, Y. J. Wang, Y. J. Kim, Rebecca J. Christianson, S. C. Lamarra, F. C. Chou, R. J. Birgeneau
Rebecca J. Christianson
The critical fluctuations of CuGeO3 have been measured by synchrotron x-ray scattering, and two length scales are clearly observed. The ratio between the two length scales is found to be significantly different along the a axis, with the a axis along the surface normal direction. We believe that such a directional preference is a clear sign that random surface strains, especially those caused by dislocations, are the origin of the long length scale fluctuations.
Space Weather Community Operations Workshop: Planning For The Next Decade, J. Fulgham, Jennifer Meehan, W. Tobiska
Space Weather Community Operations Workshop: Planning For The Next Decade, J. Fulgham, Jennifer Meehan, W. Tobiska
Jennifer (Jinni) Meehan
No abstract provided.
New Space Weather Products For Hf Radio, Gps Navigation, And Aviation, Jennifer Meehan
New Space Weather Products For Hf Radio, Gps Navigation, And Aviation, Jennifer Meehan
Jennifer (Jinni) Meehan
No abstract provided.
Modeling Free-Carrier Absorption And Avalanching By Ultrashort Laser Pulses, Jeremy Gulley
Modeling Free-Carrier Absorption And Avalanching By Ultrashort Laser Pulses, Jeremy Gulley
Jeremy R. Gulley
In the past decade it was demonstrated experimentally that negatively-chirped laser pulses can lower the surface LIDT for wide band-gap materials by decreasing the number of photons required for photoionization on the leading edge of the pulse. Similarly, simulations have shown that positively-chirped pulses resulting from selffocusing and self-phase modulation in bulk dielectrics can alter the onset of laser-induced material modifications by increasing the number of photons required for photoionization on the leading edge of the pulse. However, the role of multi-chromatic effects in free-carrier absorption and avalanching has yet to be addressed. In this work a frequency-selective model of …
Discrete Beam Acceleration In Uniform Waveguide Arrays, Ramy El-Ganainy, Konstantinos G. Makris, Mohammad-Ali Miri, Demetrios N. Christodoulides, Zhigang Chen
Discrete Beam Acceleration In Uniform Waveguide Arrays, Ramy El-Ganainy, Konstantinos G. Makris, Mohammad-Ali Miri, Demetrios N. Christodoulides, Zhigang Chen
Ramy El-Ganainy
Within the framework of the tight-binding model we demonstrate that Wannier-Stark states can freely accelerate in uniform optical lattices. As opposed to accelerating Airy wave packets in free space, our analysis reveals that in this case the beam main intensity features self-bend along two opposite hyperbolic trajectories. Two-dimensional geometries are also considered and an asymptotic connection between these Wannier-Stark ladders and Airy profiles is presented.
Fall 2010 Sci 2130: Quantum Physics: Information About Course: Learning Objectives, Stephen Holt
Fall 2010 Sci 2130: Quantum Physics: Information About Course: Learning Objectives, Stephen Holt
Stephen Holt
Modern Physics is based upon a few fundamental ideas that allow the explanation of phenomena that seem to defy consistency with traditional (Newtonian) physics. The most important of these (in the context of engineering applications) are the principles of quantum mechanics and statistical mechanics. This course will introduce the basic concepts of Modern Physics, with particular application to atoms, molecules and the materials utilized in modern electronics.
Fall 2010 Sci 2130: Quantum Physics: Course Materials: Homework Overview, Stephen Holt
Fall 2010 Sci 2130: Quantum Physics: Course Materials: Homework Overview, Stephen Holt
Stephen Holt
Modern Physics is based upon a few fundamental ideas that allow the explanation of phenomena that seem to defy consistency with traditional (Newtonian) physics. The most important of these (in the context of engineering applications) are the principles of quantum mechanics and statistical mechanics. This course will introduce the basic concepts of Modern Physics, with particular application to atoms, molecules and the materials utilized in modern electronics.
Fall 2010 Sci 2130: Quantum Physics: Course Materials: Assignments, Stephen Holt
Fall 2010 Sci 2130: Quantum Physics: Course Materials: Assignments, Stephen Holt
Stephen Holt
Modern Physics is based upon a few fundamental ideas that allow the explanation of phenomena that seem to defy consistency with traditional (Newtonian) physics. The most important of these (in the context of engineering applications) are the principles of quantum mechanics and statistical mechanics. This course will introduce the basic concepts of Modern Physics, with particular application to atoms, molecules and the materials utilized in modern electronics.
Fall 2010 Sci 2130: Quantum Physics: Information About Course: Course Syllabus, Stephen Holt
Fall 2010 Sci 2130: Quantum Physics: Information About Course: Course Syllabus, Stephen Holt
Stephen Holt
Modern Physics is based upon a few fundamental ideas that allow the explanation of phenomena that seem to defy consistency with traditional (Newtonian) physics. The most important of these (in the context of engineering applications) are the principles of quantum mechanics and statistical mechanics. This course will introduce the basic concepts of Modern Physics, with particular application to atoms, molecules and the materials utilized in modern electronics.
Electrically Reconfigurable And Thermally Sensitive Optical Properties Of Gold Nanorods Dispersed Liquid Crystal Blue Phase, Jenny-Marie Wong, Jeoung-Yeon Hwang, Liang-Chy Chien
Electrically Reconfigurable And Thermally Sensitive Optical Properties Of Gold Nanorods Dispersed Liquid Crystal Blue Phase, Jenny-Marie Wong, Jeoung-Yeon Hwang, Liang-Chy Chien
Liang-Chy Chien
We report the electrically reconfigurable optical properties of gold nanorods (AuNRs) dispersed liquid crystal blue phase (BP). In principle, dispersing gold nanorods in a BP should not possess a critical concentration of the dispersant at the nanoscale, because the free-energy cost of disclination is negligible. Yet, the experimental results indicate that BP range reaches a plateau at a critical concentration of AuNRs. The mesophase range of the pure BP studied by polarizing optical microscopy is theoretically validated. The optical property of an AuNRs dispersed BP system is electrically and thermally reconfigurable.
Experimental Studies Of The Mechanisms Of Photomechanical Effects In A Nematic Liquid Crystal Elastomer, Nathan J. Dawson, Mark G. Kuzyk, Jeremy Neal, Paul Luchette, Peter Palffy-Muhoray
Experimental Studies Of The Mechanisms Of Photomechanical Effects In A Nematic Liquid Crystal Elastomer, Nathan J. Dawson, Mark G. Kuzyk, Jeremy Neal, Paul Luchette, Peter Palffy-Muhoray
Peter Palffy-Muhoray
Azo-dye-doped liquid crystal elastomers (LCEs) are known to show a strong photomechanical response. We report on experiments that suggest that photothermal heating is the underlying mechanism in surface-constrained geometry. In particular, we use optical interferometry to probe the length change of the material and direct temperature measurements to determine heating. LCEs with various dopants and optical density were used to study the individual mechanisms. In the high dye-doped limit, most of the light is absorbed near the entry surface, which causes a local strain from photothermal heating and a nonlocal strain from thermal diffusion. The results of our research on …
Emp: A Brief Tutorial, George H. Baker Iii
Emp: A Brief Tutorial, George H. Baker Iii
George H Baker
A nuclear detonation at altitudes from about 30 to 500 kilometers generates a strong electromagnetic pulse (EMP) that propagates to points on the ground within the line-of-sight of the burst. For bursts above 100 kilometers, electronics can be affected over continental scale areas. The EMP induces large voltages and currents in antennas and cables of electronic systems that will upset operation or damage circuit components if protection measures are not present. The article provides a brief tutorial on EMP environments, effects and protection.
High Power Electromagnetic Weapons: A Brief Tutorial, George H. Baker Iii
High Power Electromagnetic Weapons: A Brief Tutorial, George H. Baker Iii
George H Baker
High power electromagnetic weapons, also referred to as high power radiofrequency (HPRF) weapons, are a type of directed energy weapons. The system effects of high power electromagnetic environments are well recognized by world scientific and military communities. Former CIA Director John Deutch has said that, "the electron is the ultimate precision-guided weapon." In the course of the investigation ofnuclear EMP effects on electronics during the Cold War period, it became evident that garden variety, unprotected electronics would malfunction, in some cases burn out, in the presence of electromagnetic fields in the hundreds to thousands of volts per meter. The EMP …
Limits To Gelation In Colloidal Aggregation, S. Manley, L. Cipelletti, V. Trappe, A. E. Bailey, Rebecca J. Christianson, U. Gasser, V. Prasad, P. N. Segre, M. P. Doherty, S. Sankaran, A. L. Jankovsky, B. Shiley, J. Bowen, J. Eggers, C. Kurta, T. Lorik, D. A. Weitz
Limits To Gelation In Colloidal Aggregation, S. Manley, L. Cipelletti, V. Trappe, A. E. Bailey, Rebecca J. Christianson, U. Gasser, V. Prasad, P. N. Segre, M. P. Doherty, S. Sankaran, A. L. Jankovsky, B. Shiley, J. Bowen, J. Eggers, C. Kurta, T. Lorik, D. A. Weitz
Rebecca J. Christianson
We show that the dynamics of large fractal colloid aggregates are well described by a combination of translational and rotational diffusion and internal elastic fluctuations, allowing both the aggregate size and internal elasticity to be determined by dynamic light scattering. The comparison of results obtained in microgravity and on Earth demonstrates that cluster growth is limited by gravity-induced restructuring. In the absence of gravity, thermal fluctuations ultimately inhibit fractal growth and set the fundamental limitation to the lowest volume fraction which will gel.
Critical Dynamics Of A Spin-5/2 Two-Dimensional Isotropic Antiferromagnet, Rebecca J. Christianson, R. L. Leheny, R. J. Birgeneau, R. W. Erwin
Critical Dynamics Of A Spin-5/2 Two-Dimensional Isotropic Antiferromagnet, Rebecca J. Christianson, R. L. Leheny, R. J. Birgeneau, R. W. Erwin
Rebecca J. Christianson
We report a neutron-scattering study of the dynamic spin correlations in Rb2MnF4, a two-dimensional spin-5/2 antiferromagnet. By tuning an external magnetic field to the value for the spin-flop line, we reduce the effective spin anisotropy to essentially zero, thereby obtaining a nearly ideal two-dimensional isotropic antiferromagnet. From the shape of the quasielastic peak as a function of temperature, we demonstrate dynamic scaling for this system and find a value for the dynamical exponent z. We compare these results to theoretical predictions for the dynamic behavior of the two-dimensional Heisenberg model, in which deviations from z=1 provide a measure of the …
Spin Correlations In An Isotropic Spin-5/2 Two-Dimensional Antiferromagnet, R. L. Leheny, Rebecca J. Christianson, R. J. Birgeneau, R. W. Erwin
Spin Correlations In An Isotropic Spin-5/2 Two-Dimensional Antiferromagnet, R. L. Leheny, Rebecca J. Christianson, R. J. Birgeneau, R. W. Erwin
Rebecca J. Christianson
We report a neutron scattering study of the spin correlations for the spin-5/2 two-dimensional antiferromagnet Rb2MnF4 in an external magnetic field. Choosing fields near the system’s bicritical point, we tune the effective anisotropy in the spin interaction to zero, constructing an ideal S = 5/2 Heisenberg system. The correlation length and structure factor amplitude are closely described by the semiclassical theory of Cuccoli 'et al.' over a broad temperature range, but show no indication of approaching the low-temperature renormalized classical regime of the quantum nonlinear sigma model.
Critical Dynamics Of A Spin-5/2 Two-Dimensional Isotropic Antiferromagnet, Rebecca J. Christianson, R L. Leheny, R J. Birgeneau, R W. Erwin
Critical Dynamics Of A Spin-5/2 Two-Dimensional Isotropic Antiferromagnet, Rebecca J. Christianson, R L. Leheny, R J. Birgeneau, R W. Erwin
Rebecca J. Christianson
We report a neutron-scattering study of the dynamic spin correlations in Rb2MnF4, a two-dimensional spin-5/2 antiferromagnet. By tuning an external magnetic field to the value for the spin-flop line, we reduce the effective spin anisotropy to essentially zero, thereby obtaining a nearly ideal two-dimensional isotropic antiferromagnet. From the shape of the quasielastic peak as a function of temperature, we demonstrate dynamic scaling for this system and find a value for the dynamical exponent z. We compare these results to theoretical predictions for the dynamic behavior of the two-dimensional Heisenberg model, in which deviations from z=1 provide a measure of the …
Electrochemistry And Staging In La2cuo4+D, P Blakeslee, R J. Birgeneau, F C. Chou, Rebecca J. Christianson, M A. Kastner, Y S. Lee, B O. Wells
Electrochemistry And Staging In La2cuo4+D, P Blakeslee, R J. Birgeneau, F C. Chou, Rebecca J. Christianson, M A. Kastner, Y S. Lee, B O. Wells
Rebecca J. Christianson
Measurements are reported of the time dependence of the current during electrochemical oxidation and reduction at a fixed voltage of single crystals and ceramic samples of La2CuO4+d. Staging peaks in neutron measurements of the single crystals together with the electrochemical measurements and magnetization measurements confirm that stage n=6 corresponds to d=0.055 +/- 0.05, the high-d side of the oxygen-rich–oxygen-poor miscibility gap. Furthermore, stage n=4 occurs at a value of d consistent with d{n^-1. For ceramic samples it is shown that two different superconducting compounds are formed depending on the oxidation voltage used.
Vuv Absorption Cross Section Of Benzene, Relevance For Titan’S Atmosphere, F-J. Capalbo, Y. Bénilan, N. Fray, M. Schwell, Et. Es-Sebbar, N. Champion, T. Koskinen, R. Yelle
Vuv Absorption Cross Section Of Benzene, Relevance For Titan’S Atmosphere, F-J. Capalbo, Y. Bénilan, N. Fray, M. Schwell, Et. Es-Sebbar, N. Champion, T. Koskinen, R. Yelle
Dr. Et-touhami Es-sebbar
Saturn's largest satellite, Titan, is the only one in the Solar System known to have a thick N2/CH4, planet like atmosphere. The dissociation of these principal components and the recombination of the products make this atmosphere to be rich in organic compounds of high interest for astrobiology. Solar and stellar occultations observed by the Ultraviolet Imaging Spectrograph (UVIS) on board the Cassini spacecraft can be used to characterize the composition of Titan’s upper atmosphere (400 – 1400 km). The results depend strongly on the knowledge of the molecular absorption cross sections of the atmospheric constituents (Ferradaz et al. 2009). This …
Measuring The Persistence Length Of Mcf7 Cell Microtubules In Vitro, Mitra Shojania-Feizabadi, Kiryako Mutafopulos, Adam Behr
Measuring The Persistence Length Of Mcf7 Cell Microtubules In Vitro, Mitra Shojania-Feizabadi, Kiryako Mutafopulos, Adam Behr
Mitra Shojania-Feizabadi
No abstract provided.
Electronic Transport In Oxygen Deficient Ferromagnetic Semiconducting Tio$_{2-\Delta}$, Soack Dae Yoon, Vincent G. Harris, Carmine Vittoria, A. Widom
Electronic Transport In Oxygen Deficient Ferromagnetic Semiconducting Tio$_{2-\Delta}$, Soack Dae Yoon, Vincent G. Harris, Carmine Vittoria, A. Widom
Carmine Vittoria
TiO$_{2-\delta}$ films were deposited on (100) Lanthanum aluminates LaAlO$_{3}$ substrates at a very low oxygen chamber pressure $P\approx 0.3$ mtorr employing a pulsed laser ablation deposition technique. In previous work, it was established that the oxygen deficiency in these films induced ferromagnetism. In this work it is demonstrated that this same oxygen deficiency also gives rise to semiconductor titanium ion impurity donor energy levels. Transport resistivity measurements in thin films of TiO$_{2-\delta}$ are presented as a function of temperature and magnetic field. Magneto- and Hall- resistivity is explained in terms of electronic excitations from the titanium ion donor levels into …
Analysis Of Electroluminescence Spectra Of Silicon And Gallium Arsenide P-N Junctions In Avalanche Breakdown, M Lahbabi, A Ahaitoufa, M. Fliyou, E. Abarkan, J.-P. Charles, A. Bath, A. Hoffmann, Sherra Kerns, David Kerns, Jr.
Analysis Of Electroluminescence Spectra Of Silicon And Gallium Arsenide P-N Junctions In Avalanche Breakdown, M Lahbabi, A Ahaitoufa, M. Fliyou, E. Abarkan, J.-P. Charles, A. Bath, A. Hoffmann, Sherra Kerns, David Kerns, Jr.
David V. Kerns
We present a generalized study of light emission from reverse biased p–n junctions under avalanche breakdown conditions. A model is developed based on direct and indirect interband processes including self-absorption to describe measured electroluminescence spectra. This model was used to analyze experimental data for silicon (Si) and gallium arsenide p–n junctions and can be extended to several types of semiconductors regardless of their band gaps. This model can be used as a noninvasive technique for the determination of the junction depth. It has also been used to explain the observed changes of the Si p–n junction electroluminescence spectra after fast …
Analysis Of Electroluminescence Spectra Of Silicon And Gallium Arsenide P-N Junctions In Avalanche Breakdown, M Lahbabi (Adjunct), A Ahaitoufa, M. Fliyou, E. Abarkan, J.-P. Charles, A. Bath, A. Hoffmann, Sherra E. Kerns, David V. Kerns, Jr.
Analysis Of Electroluminescence Spectra Of Silicon And Gallium Arsenide P-N Junctions In Avalanche Breakdown, M Lahbabi (Adjunct), A Ahaitoufa, M. Fliyou, E. Abarkan, J.-P. Charles, A. Bath, A. Hoffmann, Sherra E. Kerns, David V. Kerns, Jr.
Sherra E. Kerns
We present a generalized study of light emission from reverse biased p–n junctions under avalanche breakdown conditions. A model is developed based on direct and indirect interband processes including self-absorption to describe measured electroluminescence spectra. This model was used to analyze experimental data for silicon (Si) and gallium arsenide p–n junctions and can be extended to several types of semiconductors regardless of their band gaps. This model can be used as a noninvasive technique for the determination of the junction depth. It has also been used to explain the observed changes of the Si p–n junction electroluminescence spectra after fast …
Bistability In A Simple Fluid Network Due To Viscosity Contrast, John B. Geddes, Brian D. Storey, David Gardner, Russell T. Carr
Bistability In A Simple Fluid Network Due To Viscosity Contrast, John B. Geddes, Brian D. Storey, David Gardner, Russell T. Carr
John B. Geddes
We study the existence of multiple equilibrium states in a simple fluid network using Newtonian fluids and laminar flow. We demonstrate theoretically the presence of hysteresis and bistability, and we confirm these predictions in an experiment using two miscible fluids of different viscosity—sucrose solution and water. Possible applications include blood flow, microfluidics, and other network flows governed by similar principles.