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Journal of Applied Physics : Electrical transport and thermoelectr...

By: D. Li, K. Yang, H. H. Hng, X. Y. Qin, and J. Ma

Description: The electrical transport and thermoelectric properties of CoSb3 and double filled compounds Ca0.1CexCo4Sb12 (x = 0.05, 0.1, and 0.15) were investigated in the temperature range from 5 to 300 K. The results indicated that double filling of Ca and Ce has a strong influence on the temperature dependence of the electrical resistivity. For samples CoSb3 and Ca0.1Ce0.05Co4Sb12, the relationship of ln ρ∝1/T existed only in the temperature regimes of 100–200 and 160...

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Biblioteca Hispanica : Natural History Explanation of the Blades o...

By: Legua Castro and Vicente
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Journal of Applied Physics : Melting/collapse of charge orbital or...

By: M. Nadeem and M. J. Akhtar

Description: The aim of this article is to study the properties of the crystalline face centered cubic Ge1Sb2Te4 phase as a function of annealing and measuring temperature. This material is one of the stoichiometric members of the Ge:Sb:Te family, which is widely used in the phase change data storage and one candidate for multistate recording. The electrical properties of this material have been investigated using two independent methods, the four probe impedance and the...

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Applied Physics Letters : Effect of viscosity of base fluid on the...

By: Tsung-Han Tsai, Long-Sheng Kuo, Ping-Hei Chen, and Chin-Ting Yang

Description: This study aims to investigate the effect of viscosity of the base fluid on the thermal conductivity of nanofluids in which Fe3O4 nanoparticles are suspended in the base fluid composed of diesel oil and polydimethylsiloxane. Viscosity of the base fluid is varied by changing the volumetric fractions between both fluids. The measured thermal conductivity of nanofluids gradually approaches the value predicted by the Maxwell equation by increasing the viscosity....

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Review of Scientific Instruments : Correction of spherical aberrat...

By: Alexander Pikin and Ahovi Kponou

Description: Two methods to correct spherical aberration in electrostatic gridded lenses have been studied using ray-tracing simulations. Both methods are based on modifying the electrostatic field on the radial periphery of the lens. In the simplest case, the modification is done by extending the grid support axially. In the second method, the electric field on a radial periphery of the lens is modified by applying optimum voltage on an isolated correcting electrode. It...

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Journal of Applied Physics : Laser annealing characteristics of mu...

By: Paul DeMange, Christopher W. Carr, Raluca A. Negres, Harry B. Radousky, and Stavros G. Demos

Description: Laser annealing by pre-exposure to subdamage threshold laser pulses is a well-established method to increase the damage performance of bulk KH2PO4 and KDxH2−xPO4 nonlinear optical materials. The origin of laser-induced damage is believed to be localized absorption by a defect structure, either a light-absorbing foreign nanoparticle or a cluster of stoichiometric defects. It has been recently shown that there are at least three populations of such defect stru...

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Biblioteca Hispanica : Outline Natural History

By: Antonio Gascon Soriano
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Chaos : Stability and multiple bifurcations of a damped harmonic o...

By: Yongli Song, Tonghua Zhang, and Moses O. Tadé

Description: We investigate the dynamics of a damped harmonic oscillator with delayed feedback near zero eigenvalue singularity. We perform a linearized stability analysis and multiple bifurcations of the zero solution of the system near zero eigenvalue singularity. Taking the time delay as the bifurcation parameter, the presence of steady-state bifurcation, Bogdanov–Takens bifurcation, triple zero, and Hopf-zero singularities is demonstrated. In the case when the system...

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Journal of Applied Physics : Influence of Mg doping on the giant d...

By: Yi Liu, Chang-Hui Li, Xiang-Qun Zhang, Zhao-Hua Cheng, and Young Sun

Description: A giant dielectric tunability effect in LuFe2O4 was recently discovered by our group. Here we report the influence of Mg doping on the dielectric tunability and dielectric loss in LuFe2−xMgxO4 (x ≤ 0.1) samples. It was found that the temperature interval of the giant dielectric tunability is broadened by a slight (5%) Mg doping, while the dielectric loss remains the same order. The maximum value of tunability is reduced by Mg doping, which supports the viewp...

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Journal of Applied Physics : Tailoring nucleation and growth condi...

By: Chandan Srivastava, David E. Nikles, and Gregory B. Thompson

Description: To eliminate compositional and size variabilities between individual binary nanoparticles, it is essential to control the mechanistic steps involved in nanoparticle synthesis. A common method for synthesizing FePt nanoparticles involves the simultaneous decomposition and reduction in iron and platinum precursors, respectively. This simultaneous nucleation and growth method yields wide composition and size distributions. This paper describes and experimentall...

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The Journal of Chemical Physics : First-principles study of therma...

By: Jun-Ho Lee, Ji Young Lee, and Jun-Hyung Cho

Description: Using first-principles density-functional calculations, we investigate the reaction of acetone on the Si(001) surface, which exhibits the conversion from a kinetically controlled reaction to thermodynamically controlled one by means of thermal anneal or the highly confined electron beam of the scanning tunneling microscopy (STM) tip. We identified the four different reaction pathways forming not only two kinds of di-σ structures on top of a single Si dimer (...

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Applied Physics Letters : Elliptically polarized terahertz emissio...

By: Yanping Chen, Claude Marceau, Weiwei Liu, Zhen-Dong Sun, Yizhu Zhang et al

Description: Elliptically polarized terahertz emission from a femtosecond laser filament in air in the forward direction was discovered by using a wire grid polarizer and electro-optic sampling technique. The generation mechanism could be through four-wave optical rectification or second-order optical rectification inside the filament zone where the inversion symmetry of air is broken.

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Physics of Fluids : Taylor dispersion in polymerase chain reaction...

By: Jinkee Lee, Elejdis Kulla, Anuj Chauhan, and Anubhav Tripathi

Description: Polymerase chain reaction (PCR) is commonly used for a wide range of DNA applications such as disease detection, genetic fingerprinting, and paternity testing. The importance of PCR has led to an increased interest in performing PCR in a microfluidic platform with a high throughput while using very small DNA quantities. In this paper we solve convection-diffusion equations for the DNA and deoxynucleoside triphosphate (dNTP) under conditions suitable for PCR ...

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Physics of Fluids : Chaotic motions of a forced droplet-droplet os...

By: D. M. Slater, C. A. López, A. H. Hirsa, and P. H. Steen

Description: A model for the motion of two coupled spherical-cap droplets subject to periodic forcing is studied. The inviscid unforced model is a conservative second-order system, similar to Duffing’s equation. Surface tension resists the inertia of deformations from the spherical shape. Steady states of the system are parametrized by the total combined volume of the two droplet caps. The family of equilibria exhibits a classical pitchfork bifurcation, where a single le...

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Physics of Plasmas : A new fast reconnection model in a collisionl...

By: David Tsiklauri

Description: Based on the first principles [i.e., (i) by balancing the magnetic field advection with the term containing electron pressure tensor nongyrotropic components in the generalized Ohm’s law; (ii) using the conservation of mass; and (iii) assuming that the weak magnetic field region width, where electron meandering motion supports electron pressure tensor off-diagonal (nongyrotropic) components, is of the order of electron Larmor radius] a simple model of magnet...

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Physics of Fluids : Helical instability of a rotating liquid jet

By: J. P. Kubitschek and P. D. Weidman

Description:

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Civil War and Civil War Related Prints : Col B Grierson, 6Th Ill C...

By: Michael Cáceres and Giron
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Biblioteca Hispanica : Lessons of Natural History

By: Augustine Yanez and Girona
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Journal of Physical and Chemical Reference Data : Wavelengths, Tra...

By: J. E. Sansonettia

Description: Energy levels, with classifications and uncertainties, have been compiled for the spectra of the neutral atom and all positive ions of sodium (Z=11). Wavelengths with classifications, intensities, and transition probabilities are also tabulated. In addition, ground states and ionization energies are listed. Where available, the hyperfine structure constants and the percentages of the leading components of the energy levels are included. For all ionization st...

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The Journal of Chemical Physics : Constructing explicit magnetic a...

By: Jacob D. Stevenson, Aleksandra M. Walczak, Randall W. Hall, and Peter G. Wolynes

Description: By defining a spatially varying replica overlap parameter for a supercooled liquid referenced to an ensemble of fiducial liquid state configurations, we explicitly construct a constrained replica free energy functional that maps directly onto an Ising Hamiltonian with both random fields and random interactions whose statistics depend on the liquid structure. Renormalization group results for random magnets when combined with these statistics for the Lennard-...

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