I have this colleague, a physicist, who thinks too much. One day, duringlunch at La Fuente restaurant, he asked with a mischievous grin, "May I try out an idea on you?" Iwinced, remembering past "ideas,...
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I have this colleague, a physicist, who thinks too much. One day, duringlunch at La Fuente restaurant, he asked with a mischievous grin, "May I try out an idea on you?" Iwinced, remembering past "ideas," bu said, "Only if you pick up the tab."
The Electron Localisation Function, ELF pictorially visualises chemists' intuitive ideas of single and multiple bonds as well as non-bonding electron pairs in molecules. The power of the representation of chemical...
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The Electron Localisation Function, ELF pictorially visualises chemists' intuitive ideas of single and multiple bonds as well as non-bonding electron pairs in molecules. The power of the representation of chemical bonds via ELF is that on the one hand covalent, polar, and ionic bonds are distinguishable, and that on the other hand ELF can be calculated for molecules and solids. This enables us to transfer the ideas of chemical bonding from molecular to intermetallic compounds. Localised two-electron-two-centre bonds and lone pairs are present in solid-state valence compounds (ZintI phases) as expected by the 8-N rule. In solids, lone pairs are generally more contracted than in molecules due to 'lone-pair repulsion'. In intermetallic compounds localised electrons predominantly occur in the form of lone pairs. Lattice vibrations influence the strength of lone pair interactions and non-bonded interactions lead to an exchange of delocalised and localised electrons. Such a mechanism of local electron pair formation gives rise to ideas of a chemical view of the phenomenon of superconductivity in intermetallic compounds.
作者：
Correia, BMSI
Springfield MA USA MSI
Hartford CT USA MSI
Providence RI USA
Management Search Inc. (MSI), a recruitment and employment placement firmwith more than 50 employees across three states, began in 1983 as the idea of two men about how tobuild a better mousetrap. Lee Lopez and Thomas...
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Management Search Inc. (MSI), a recruitment and employment placement firmwith more than 50 employees across three states, began in 1983 as the idea of two men about how tobuild a better mousetrap. Lee Lopez and Thomas Rybeck had been in the recruiting industry for yearsand had noticed a lot of disturbing practices among their colleagues. Too many recruiters were justgetting by with the "throw as much as you can at it and see what sticks" philosophy. Rybeck andLopez knew there was a better way. They founded MSI on a much different philosophy - they believedthe search process should be laid out into a structured plan and implemented consistently in a waythat had been proven successful. Little did they know at the time that they were paralleling ISO9000 ideals formed decades before. And so MSI's focus on quality truly began at MSI's beginning -albeit unknowingly.
The WIMSD4 and CITATION codes are used to calculate neutronic parameters of a TRIGA reactor. The results are compared with experimental values. Five configurations are analysed and the excess reactivity worth, the fue...
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The WIMSD4 and CITATION codes are used to calculate neutronic parameters of a TRIGA reactor. The results are compared with experimental values. Five configurations are analysed and the excess reactivity worth, the fuel temperature reactivity coefficient, the control reactivity worth, safety and regulation rod of the TRIGA IPR-R1 reactor are calculated. The idea is to obtain the systematic error for k(infinity) for this methodology comparing the calculated and the experimental results. (C) 2002 Elsevier Science Ltd. All rights reserved.
The importance of oxide films and their perfection in extending the application of aluminum alloys are shown. The composition and structure of oxide films formed by microarc oxidation on aluminum alloys of different a...
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The importance of oxide films and their perfection in extending the application of aluminum alloys are shown. The composition and structure of oxide films formed by microarc oxidation on aluminum alloys of different alloying systems and production methods are studied. The dependence of the oxide coating properties on the parameters of microarc oxidation are found. The results obtained are discussed in terms of the existing concepts of microarc oxidation.
A survey is presented of recent progress in studying kinetically constrained Ising models using numerical approaches, a Fock-space formulation of the master equation and a mode-coupling approach, respectively. To this...
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A survey is presented of recent progress in studying kinetically constrained Ising models using numerical approaches, a Fock-space formulation of the master equation and a mode-coupling approach, respectively. To this end, numerical results of various kinds are discussed, and also in connection with some ideas related to the glass transition. Furthermore, kinetically facilitated Ising models, considered as candidates for describing systems with a pronounced cooperativity, are reformulated in a second-quantized formulation. Using this approach, kinetic constraints can be incorporated into an analytical study. We discuss in great detail a one-dimensional model and mean-field approaches of several kinds;finally, we give some ideas for a mode-coupling approach to the slow dynamics of such kinetically constrained Ising models in higher dimensions.
Examines the Mexican graphic designs of printer Ignacio Cumplido, with emphasis on the typographic aspects of his production. Overview of the publishing industry and typography in 19th-century Mexico; Background on Cu...
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Examines the Mexican graphic designs of printer Ignacio Cumplido, with emphasis on the typographic aspects of his production. Overview of the publishing industry and typography in 19th-century Mexico; Background on Cumplido; Examples of his works.
We present some ideas on self-validating (SV) methods. This note is especially intended to give some background for the articles in this special volume of LAA. It is not intended to be a survey of the big variety of a...
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We present some ideas on self-validating (SV) methods. This note is especially intended to give some background for the articles in this special volume of LAA. It is not intended to be a survey of the big variety of all possible aspects of SV methods but rather a summary of some basic concepts. Especially, some common misconceptions are mentioned and explored. (C) 2001 Elsevier Science Inc. All rights reserved.
We demonstrate 100-nm-resolution holographic aerial image monitoring based on lensless Fourier-transform holography at extreme-UV (EUV) wavelengths, using synchrotron-based illumination. This method can be used to mon...
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We demonstrate 100-nm-resolution holographic aerial image monitoring based on lensless Fourier-transform holography at extreme-UV (EUV) wavelengths, using synchrotron-based illumination. This method can be used to monitor the coherent imaging performance of EW lithographic optical systems. The system has been implemented in the EUV phase-shifting point-diffraction interferometer recently developed at Lawrence Berkeley National Laboratory. Here we introduce the idea of the holographic aerial image-recording technique and present imaging performance characterization results for a 10 x Schwarzschild objective, a prototype EW lithographic optic. The results are compared with simulations, and good agreement is obtained. Various object patterns, including phase-shift-enhanced patterns, have been studied. Finally, the application of the holographic aerial image-recording technique to EUV multilayer mask-blank defect characterization is discussed. (C) 2001 Optical Society of America.
作者：
Barthe, JCEA
Dept Instrumentat & Metrol Rayonnements Ionisants Ctr Saclay F-91191 Gif Sur Yvette France
This paper attempts to give an idea on the state of the art in electronic solid state dosimetry. including devices mainly based on semiconductors and diamond. Research in this area has made great progress. (C) 2001 El...
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This paper attempts to give an idea on the state of the art in electronic solid state dosimetry. including devices mainly based on semiconductors and diamond. Research in this area has made great progress. (C) 2001 Elsevier Science B.V. All rights reserved.
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