Materials Literature
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In correlated electron systems such as cuprate superconductors and colossal magnetoresistive (CMR) oxides there is often a tendency for a nanoscale self-organization of electrons that can give rise to exotic properties and to extreme non-linear responses. The driving mechanisms for this self-organization are highly de…
We have investigated magnetic and transport properties of the {\it kagomé-bilayer} ferromagnet Fe$_{3}$Sn$_{2}$. A soft ferromagnetism and a large anomalous Hall effect are observed. The saturated Hall resistivity of Fe$_{3}$Sn$_{2}$ is 3.2 $μΩ$cm at 300 K, which is almost 20 times higher than that of typical itineran…
We report a combined study of the Nernst coefficient (v), Hall effect and thermoelectric power of CaFe2As2 and CaFe1.92Co0.08As2 single crystals. The absolute value of v in both samples is enhanced, probably due to ambipolar flow of electron- and hole-like quasiparticles. The onset of spin-density-wave order in CaFe2A…
We study the problem of two Dirac particles interacting through non-relativistic potentials and confined to a two-dimensional sheet, which is the relevant case for graphene layers. The two-body problem cannot be mapped into that of a single particle, due to the non-trivial coupling between the center-of-mass and the r…
Fur die Stockrosen (Alcea) ist der kerzengerade, hohe Blutenstand typisch. Die Stockrose ist eine Staudenpflanze, die erst ab dem zweiten Jahr bluht. Sie ist zwei- oder mehrjahrig.
Five sessions were held at the Sanibel Symposium 2008. 14 speakers, 5 chair persons for these 5 sessions and a number of posters are presented at the poster sessions.
以FeCl3在尿素溶液中的水解产物FeO(OH)和Ba2+的碳酸盐沉淀BaCO3为反应前驱体,在800℃下煅烧得到了具有六角片状形貌的BaFe12O19粉末。给出了该方法制备BaFe12O19的实验条件,采用羞示扫描量热计(DSC)对煅烧过程进行了分析;用X射线粉末衍射仪(XRD)研究了不同温度下煅烧所得产品的物相;用扫描电镜(SEM)对产品的形貌进行了表征,采用高强脉冲磁强计测定了样品的磁性能;并探讨了前驱体中Ba/Fe比对产物物相的影响。
The aim of this study was to establish a method of isolating and culturing smooth muscle cells from the ductus deferens of rats. Smooth muscle cells were prepared from ductus deferens by explanting technique after dissection of adventitia and intimae, and cultured in vitro. The identification of the smooth muscle cell…
This 20 year-old, 75' x 120' concrete structure, originally built for landing four medical helicopters, was presented to Torello Engineers with serious structural deficiencies, a deteriorated landing slab and structurally insufficient safety outriggers. Torello Engineers was charged with investigating the extent of re…
FULLERENES can catalyze hydrogenation of organic compounds as effectively as metals can, according to a study by researchers in China ( J. Am. Chem. Soc., DOI: 10.1021/ja9061097). The discovery may lead to replacing precious-metal catalysts with carbon-based substitutes, which could reduce costs and the environmental…
Starting in 1969, American Electric Power (AEP) built a 765kV transmission network that amounted to over 2,000 circuit miles by 1984. The system utilized four—conductor bundles of Rail and Dipper conductors. Operational experience with the network revealed issues around audible noise due to corona from the lines. In 1…
This paper will present case studies and assessment of collapses of tall, free standing residential masonry chimneys resulting from windstorms in North Texas. The case studies will outline the assessment of the causes of the collapses and a discussion of design and/or construction defects. A review of limited and high…
The overall goal of this project is to enable hazard assessment modeling of munition systems. During its life-cycle, munitions can be exposed to a variety of unplanned stimuli. Predictive modeling tools capable of determining munition response to these stimuli can reduce the costs associated with Insensitive Munitions…
We give an elementary proof of Noether's first Theorem while stressing the magical fact that the global quasi-symmetry only needs to hold for one fixed integration region. We provide sufficient conditions for gauging a global quasi-symmetry.
Continuous operation of a tokamak for fusion energy has clear engineering advantages but requires conditions beyond those sufficient for a burning plasma. The fusion reactions and external sources must support both the pressure and the current equilibrium without inductive current drive, leading to demands on stabilit…
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The single-arc method of surfacing with coated electrodes is used widely but five to six layers must be deposited to produce a metal without impurities of the parent metal. There are no data in the...
The increase of the volume and the range of production of plastics and the expansion of the areas of application of these materials in the national economy stimulate investigations, development of ...
Abstract II‐VI semiconductor core/shell nanostructures with narrower bandgap shell (CdS/HgS, CdS/Ag2S, CdSe/HgSe, and CdSe/ Ag2Se), obtained from aqueous solutions in the presence of gelatin, are studied by optical absorption, photoluminescence, and Raman spectroscopy. The observed non‐monotonous behaviour of the spec…
The main criteria for the evaluation of the cold strength of steels and welded joints in steels in dynamic loading is the specific energy of fracture of a specimen with a crack (RD 50-344-82, GOST ...