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1,216 results on '"Evans, J W"'

217. Untersuchung von Zucker, Pentosanen, Stärke, Caramel

Author

Sanderova, M., Sandera, K., Stehlik, V., Gandera, K., Sattler, L., Mull, J. E., Lorge, I., Sorgato, I., Pridal, F., Conlin, A., Smolenski, C., Pietrzykowski, T., Dejmek, V., Stern, F., Kryz, F., Ofner, R., Fetzer, W. R., Evans, J. W., Hassid, W. Z., Nurmia, M., Zerban, F. W., Hughes, W. J., Wiley, M. H., Taran, J. N., Scott, Mary, West, E. S., Roboz, E., Vavrinecz, G., Nordlund, M., Magraw, D. A., Sievert, C. W., Massa, F., Kminek, M., Sanya, S., Riehm, H., de Whalley, H. C. S., Fernández, Ö., de Mingo, M., Oschmjan, G., Kudrjawzewa, M., Sinclair, W. B., Bartholomew, E. T., Jácobsohn, K. P., Mayrhofer, J., Jekel, E., Josz, A., and Molirískij, S.

Published
1937
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219. Zucker

Author

Saillard, E., Saunier, R., Pucherna, J., Davies, J. G., Kořán, V., Meyer, Auch Otto, Dolinek, A., Smole⇏ki, K., Pietrzykowski, T., Jackson, D. C., Zerban, F. W., Gamble, C. A., Gillis, Clara I., Herzfeld, A., de Wolff, C. J., Buogo, G., Kindt, G. G., Os born, S. J., Zisch, J. H., Paine, H. S., Balch, R. T., Gore, H. C., Naehring, E., Landt, E., Witte, H., Schulz, A. P., Steinhoff, G., Steinhof, G., Spengler, O., Böttger, St., Ŝandera, K., Mir ĉev, A., Verfasser, Dieselben, Vasatko, J., Panzer, D., Gollnow, G., Jackson, R. F., Mathews, J. A., Fase, W. D., Lane, J. H., Eynon, L., Nyns, L., Fetzer, W. R., Evans, J. W., Longenecker, J. B., Wileyl, M. H., Ost, H., Bruhns, G., Case, A. E., Price, W. J., Ling, A. R., Giorgio, C., Napoli, I., Cole, S. W., Guarnieri, P., Pavlas, P., Ofner, R., Gracko, I., Vondrák, J., Meyer, W., Tödt, F., Shaffer, P. A., Hartmann, A. F., Halverson, J. O., Sherwood, F. W., Somogyi, M., Szahlender, K., Bertrand, G., Kjeldahl, J., Malkow, A. M., Rundle, A. S., Morris, V. H., Wesp, E. F., Dêdek, J., Grut, E., Pedersen, V. S., Bachler, Fr. R., Ware, A. H., Ŝatava, J., Plato, F., Trost, F., Drews, B., Zablinsky, K., Baerts, F., Delvaux, P., Osborn, S. J., Castiglioni, A., Wagenaar, M., Schultz, A., Kirby, G. W., Weidenhagen, R., and Ŝtêrba-Böhm, J.

Published
1937
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223. Structure and Growth of Height-Selected Ag Islands on Fivefold i − AlPdMn Quasicrystalline Surfaces: STM Analysis and Step Dynamics Modeling

Author

Ünal, Barış, Fournée, Vincent, Thiel, P. A., Evans, J. W., Ames Laboratory [Ames, USA], Iowa State University (ISU)-U.S. Department of Energy [Washington] (DOE), Laboratoire de Science et Génie des Matériaux et de Métallurgie (LSG2M), and Université Henri Poincaré - Nancy 1 (UHP)-Institut National Polytechnique de Lorraine (INPL)-Centre National de la Recherche Scientifique (CNRS)

Subjects
PACS numbers: 68.55.a, 61.44.Br, 68.37.Ef, 81.15.Aa, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Abstract

International audience; The development and local structure of height-selected 3-layer Ag islands on fivefold surfaces of icosahedral Al-Pd-Mn quasicrystals is characterized by STM for Ag deposition at 365 K. Heterogeneous nucleation of pseudomorphic single layer high islands is followed by rapid formation of 2nd and 3rd layers and subsequent lateral spreading, where each of these 3 layers consists of a family of non fcc structures. The behavior is elucidated by step dynamics modeling incorporating strain buildup for larger islands, enhanced binding in higher layers, and height selection due to quantum size effects

Published
2009
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224. Challenges and possibilities for developing adaptive optics: Ultra-high resolution optical coherence tomography

Author

Robert Zawadzki, Choi, S. S., Evans, J. W., and Werner, J. S.

Subjects
genetic structures, sense organs, eye diseases
Abstract

Recent developments in adaptive optics - optical coherence tomography (AO-OCT) allow for ultra-high isotropic resolution imaging of the in-vivo retina, offering unprecedented insight into its volumetric microscopic and cellular structures. In addition to this promising achievement, the clinical impact and application of this technology still needs to be explored. This includes assessment of limitations and challenges for existing as well as future AO-OCT systems, especially in the context of potential transfer of this technology from an optical bench to a portable imaging system. To address these issues we will describe our current AO-UHR-OCT focusing on its sub-components, as well as application for clinical imaging. Additionally, we describe some directions for future development of our AO-OCT instrument that would improve its clinical utility including: new compact AO-OCT design, new improved AO sub-system (extreme AO), and new generations of Fourier-domain-OCT. © 2008 SPIE.

Published
2008

231. ZGB surface reaction model with high diffusion rates.

Author

Evans, J. W.

Subjects
*MONOMERS, *ADSORPTION (Chemistry), *DIFFUSION
Abstract

The diffusionless ZGB (monomer–dimer) surface reaction model exhibits a discontinuous transition to a monomer-poisoned state when the fraction of monomer adsorption attempts exceeds 0.525. It has been claimed that this transition shifts to 2/3 with introduction of rapid diffusion of the monomer species, or of both species. We show this is not the case, 2/3 representing the spinodal rather than the transition point. For equal diffusion rates of both species, we find that the transition only shifts to 0.5951±0.0002. [ABSTRACT FROM AUTHOR]

Published
1993
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232. Modeling spatiotemporal behavior of the NO+CO reaction on Pt.

Author

Evans, J. W., Madden, H. H., and Imbihl, R.

Subjects
*ADSORPTION (Chemistry), *CRYSTALS, *DISSOCIATION (Chemistry)
Abstract

Various features of NO+CO reaction kinetics on Pt(100) surfaces, including temporal oscillations, are well described by a three-variable model incorporating only the CO, NO, and O coverages. Here we analyze the corresponding reaction–diffusion equations demonstrating the existence of chemical waves where an ‘‘oscillating phase’’ displaces an unreactive NO/CO phase leaving a spatially periodic structure in its wake; pulses excited via inhomogeneities from an unreactive NO/CO background; and Turing structures for sufficiently unequal NO and CO diffusion rates. [ABSTRACT FROM AUTHOR]

Published
1992
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236. Formation of a Novel Ordered Ni3Al Surface Structure by Codeposition on NiAl(110)

Author

Massachusetts Institute of Technology. Department of Chemical Engineering, Unal, Baris, Han, Yong, Evans, J. W., Massachusetts Institute of Technology. Department of Chemical Engineering, Unal, Baris, Han, Yong, and Evans, J. W.

Abstract

The formation of a new type of ordered 2D Ni3Al overlayer by low-temperature codeposition on NiAl(110) is demonstrated by kinetic Monte Carlo simulation of a multisite atomistic lattice-gas model with a precise treatment of surface diffusion kinetics. Simultaneous codeposition with 3∶1 Ni∶Al yields poor ordering at 300 K but well-ordered structures by ~500 K. Sequential codeposition of Ni, National Science Foundation (U.S.) (Grant No. CHE- 1111500), United States. Dept. of Energy (Contract No. DE-AC02-07CH11358)

Published
2012

237. Metastability in Schloegl's second model for autocatalysis: Lattice-gas realization with particle diffusion.

Author

Guo, Xiaofang, De Decker, Yannick, Evans, J W, Guo, Xiaofang, De Decker, Yannick, and Evans, J W

Abstract

We analyze metastability associated with a discontinuous nonequilibrium phase transition in a stochastic lattice-gas realization of Schloegl's second model for autocatalysis. This model realization involves spontaneous annihilation, autocatalytic creation, and diffusion of particles on a square lattice, where creation at empty sites requires an adjacent diagonal pair of particles. This model, also known as the quadratic contact process, exhibits discontinuous transition between a populated active state and a particle-free vacuum or "poisoned" state, as well as generic two-phase coexistence. The poisoned state exists for all particle annihilation rates p>0 and hop rates h≥0 and is an absorbing state in the sense of Markovian processes. The active or reactive steady state exists only for p below a critical value, p{e}=p{e}(h) ,but a metastable extension appears for a range of higher p up to an effective upper spinodal point, p{s+}=p{s+}(h) (i.e. p{s+}>p{e} ). For selected h ,we assess the location of p{s+}(h) by characterizing both the poisoning kinetics and the propagation of interfaces separating vacuum and active states as a function of p ., Journal Article, info:eu-repo/semantics/published

Published
2010

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