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930 results on '"Lipp M"'

1. FeynGame

Author

Harlander, R. V., Klein, S. Y., and Lipp, M.

Subjects
Physics - Physics Education, High Energy Physics - Phenomenology
Abstract

A java-based graphical tool for drawing Feynman diagrams is presented. It differs from similar existing tools in various respects. For example, it is based on models, consisting of particles (lines) and (optionally) vertices, each of which can be given their individual properties (line style, color, arrows, label, etc.). The diagrams can be exported in any standard image format, or as PDF. Aside from its plain graphical aspect, the goal of FeynGame is also educative, as it can check a Feynman diagrams validity. This provides the basis to play games with diagrams, for example. Here we describe on such game where a given set of initial and final states must be connected through a Feynman diagram within a given interaction model., Comment: 26 pages, several figures and screenshots. FeynGame is available from https://gitlab.com/feyngame/FeynGame

Published
2020
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2. Pressure Effects on the 4f Electronic Structure of Light Lanthanides

Author

Chiu, W. -T., Mortensen, D. R., Lipp, M. J., Resta, G., Jia, C., Moritz, B., Devereaux, T. P., Savrasov, S. Y., Seidler, G. T., and Scalettar, R. T.

Subjects
Condensed Matter - Strongly Correlated Electrons
Abstract

Using the satellite structure of the $L_{\gamma1}$ line in non-resonant x-ray emission spectra, we probe the high-pressure evolution of the bare 4f signature of the early light lanthanides at ambient temperature. For Ce and Pr the satellite peak experiences a sudden reduction concurrent with their respective volume collapse (VC) transitions. These new experimental results are supported by calculations using state-of-the-art extended atomic structure codes for Ce and Pr, and also for Nd, which does not exhibit a VC. Our work suggests that changes to the 4f occupation are more consistently associated with evolution of the satellite than is the reduction of the 4f moment. Indeed, we show that in the case of Ce, mixing of a higher atomic angular momentum state, driven by the increased hybridization, acts to obscure the expected satellite reduction. These measurements emphasize the importance of a unified study of a full set of microscopic observables to obtain the most discerning test of the underlying, fundamental f-electron phenomena at high pressures., Comment: 9 pages, 4 figures

Published
2017
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4. Parallel suppression of superconductivity and Fe moment in the collapsed tetragonal phase of Ca0.67Sr0.33Fe2As2 under pressure

Author

Jeffries, J. R., Butch, N. P., Lipp, M. J., Bradley, J. A., Kirshenbaum, K., Saha, S. R., Paglione, J., Kenney-Benson, C., Xiao, Y., Chow, P., and Evans, W. J.

Subjects
Condensed Matter - Superconductivity
Abstract

Using non-resonant Fe K-beta x-ray emission spectroscopy, we reveal that Sr-doping of CaFe2As2 decouples the Fe moment from the volume collapse transition, yielding a collapsed-tetragonal, paramagnetic normal state out of which superconductivity develops. X-ray diffraction measurements implicate the c-axis lattice parameter as the controlling criterion for the Fe moment, promoting a generic description for the appearance of pressure-induced superconductivity in the alkaline-earth-based 122 ferropnictides (AFe2As2). The evolution of the superconducting critical temperature with pressure lends support to theories for superconductivity involving unconventional pairing mediated by magnetic fluctuations.

Published
2014
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7. The Cost Implications in Ontario, Alberta, and British Columbia of Early Versus Delayed External Cephalic Version in the Early External Cephalic Version 2 (EECV2) Trial

Author

Hutton, E.K., Barrett, J., Carson, G.D., Delisle, M.F., Dunn, M., Edwards, S., Fernandez, A., Gafni, A., Hannah, M.E., Hewson, S., Natale, R., Ohlsson, A., Ross, S.J., Willan, A.R., Windrim, R., Pollard, J.K., Schweitzer, Sylvestre, G., Turtle, P., Bracken, M., Crowley, P., Donner, A., Duley, L., Ehrenkranz, R., Curioni, M., Abalos Gorostiaga, R., Becker, C., Elizabeth, P.A., Errandonea, L., Palermo, M., Ramos, C.A., Trabucco, M., Montes Varela, D., Bertin, M.S., Castaldi, J.L., Mohedano de Duhalde, M., Messina, A., Baumgartner, J., Kovacs, G., Malcolm, B., Neil, J.R., Mahomed, K., Green, A., Child, A., DeVries, B., Phipps, H., Welsh, A., Davis, G.K., Roberts, L., Watts, N.P., Cybulski, M., Gibson, D., Tucker, S., McCahon, I., Sheehan, P., Umstad, M., Milligan, J., Morris, J., Rickard, K., Gardener, G., Jenkins-Manning, S., Boniface, C., Edmondson, M., Watson, D., Ayub, A., Soanes, S., Jordan, A., Fanning, C., Parish, B., Watson, M.A., Reid, D., Scheufler, P., Malott, A.M., Reitsma, A., Haslauer, K.A., Lipp, M., Farquharson, D., Gray, K., Demianczuk, N., Penttinen, E., Herer, E., McLean, K., Aghajafari, F., Williams, S., Moravac, C., Yudin, M., Pollard, J., Miller, L., Anderson, R.B., Good, M., Walker, M.C., Kulkarni, R., Scarfone, R., Cameron, C., Peel, T., Carrillo, J., Cruces, A., Gonzalez, Y., Figueroa Poblete, J., Lama Hormazabal, L., Saez, J., Oyarzun, E., Rioseco, A., Illanes, S., Kottmann, C., Parra, M., Quezada, S., Quiroz, L., Hvidman, L., Mogensen, I.M., Mouritzen, A., Ostberg, B., Abdel-Samad, S.N.M., Al-Hussaini, T., El-Nashar, I., Kirss, F., Rull, K., Ustav, E., Vaas, P., Brink-Spalink, V., Weizsaecker, K., Major, T., Poka, R., Daly, S., Kaneti, H., Rosen, D., Schachter, B., Chayen, B., Harel, L., Hiaeb, Z., Malinger, G., Dukler, D., Lunenfeld, E., AlFaris, L., El-Zibdeh, M., Domzalska-Popadiuk, I., Kobiela, P., Pankrac, Z., Preis, J., Preis, K., Swiatkowska-Freund, M., Cravo, J., Theron, A.M., Theron, G.B., Cronje, H.S., du Plessis, J.M., Munoz, M., Khan, G., Khan, S., Goossens, S., Pieters, M., Roumen, F.J.M.E., ten Cate, F., Smits, F., Heres, M., Krabbendam, E., Airey, R., Farrar, D., Tuffnell, D.J., Heyes, V., Melvin, C., Schram, C., Galimberti, A., Stewart, P., Cresswell, J., McCormick, C., Andrews, J., Fleener, D., Coonrod, D., Jimenez, B.F., Brown, S., Gregg, A., Pitchford, C., Seubert, D., Ahmed, Rashid J., Gafni, Amiram, and Hutton, Eileen K.

Published
2016
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8. Energetics of polymeric carbon monoxide.

Author

Bonev, S. A., Lipp, M. J., Crowhurst, J. C., and McCarrick, J. F.

Subjects
*CARBON monoxide, *ISOTHERMAL compression, *MOLECULAR dynamics, *DENSITY functional theory, *MOLECULAR theory
Abstract

The transformation of carbon monoxide (CO) from a molecular liquid to a polymeric solid under isothermal compression at room temperature is investigated using first principles theory. We report structural and thermodynamic properties from ambient density up to 2.45 g/cc obtained using density functional theory molecular dynamics simulations, including hybrid exchange corrections. The theoretical results are compared with newly obtained polymeric CO samples, synthesized in a large volume press. The explosive performance of polymeric CO is predicted and discussed. Under most favorable assumptions, it is found to be comparable to trinitrotoluene. [ABSTRACT FROM AUTHOR]

Published
2021
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9. The ultrahigh pressure stability of silver: An experimental and theoretical study.

Author

O'Bannon, E. F., Lipp, M. J., Smith, J. S., Meng, Y., Söderlind, P., Young, D., and Jenei, Zs.

Subjects
*ELASTIC constants, *DIAMOND anvil cell, *BODY centered cubic structure, *DENSITY functional theory, *VOLUME measurements, *ELECTRON impact ionization, *SILVER, *EQUATIONS of state
Abstract

We measured the atomic volume of Ag in a toroidal diamond anvil cell to a maximum pressure of 416 GPa and calculated the atomic volume and elastic constants of Ag up to 750 and 460 GPa, respectively. Our density functional theory calculations at 0 K utilize an all-electron fully relativistic method and agree well with our volume measurements, particularly at pressures above ∼75 GPa. We corrected our experimental results for non-hydrostaticity using a line shift analysis, and the resulting Vinet equation of state (EOS) parameters are reported. We find that the uniaxial stress sustained by Ag increases linearly up to 4.5 GPa at a pressure of 416 GPa. Our experimental results indicate that the fcc structure of Ag remains stable to at least 416 GPa at room temperature. Our theoretical results show that C44 increases as pressure increases and reaches a maximum at ∼100 GPa above which it begins to decrease, a sign that the fcc structure of Ag is becoming unstable, and at V/V0 = 0.30, the bcc structure is lower in energy than fcc. [ABSTRACT FROM AUTHOR]

Published
2021
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14. Affinity Maturation in Ectopic Germinal Centers

Author

de Boer, B. A., Voigt, I., Kim, H.-J., Camacho, S. A., Lipp, M., Förster, R., Berek, C., Compans, R. W., editor, Cooper, M., editor, Hogle, J. M., editor, Ito, Y., editor, Koprowski, H., editor, Melchers, F., editor, Oldstone, M., editor, Olsnes, S., editor, Potter, M., editor, Saedler, H., editor, Vogt, P. K., editor, Wagner, H., editor, and Melchers, Fritz, editor

Published
2000
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15. Functional Organization of Secondary Lymphoid Organs by the Chemokine System

Author

Lipp, M., Burgstahler, R., Müller, G., Pevzner, V., Kremmer, E., Wolf, E., Förster, R., Compans, R. W., editor, Cooper, M., editor, Hogle, J. M., editor, Ito, Y., editor, Koprowski, H., editor, Melchers, F., editor, Oldstone, M., editor, Olsnes, S., editor, Potter, M., editor, Saedler, H., editor, Vogt, P. K., editor, Wagner, H., editor, and Melchers, Fritz, editor

Published
2000
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18. Trauma transport

Author

Lipp, M., Dick, W. F., Gullo, Antonino, editor, Berlot, G., editor, Delooz, H., editor, and Gullo, A., editor

Published
1999
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19. Regulation of Expression of Chemokine Receptor BLR1/CXCR5 during B Cell Maturation

Author

Pevzner, V., Wolf, I., Burgstahler, R., Förster, R., Lipp, M., Compans, R. W., editor, Cooper, M., editor, Hogle, J. M., editor, Koprowski, H., editor, Ito, Y., editor, Melchers, F., editor, Oldstone, M., editor, Olsnes, S., editor, Potter, M., editor, Saedler, H., editor, Vogt, P. K., editor, Wagner, H., editor, Melchers, Fritz, editor, and Potter, Michael, editor

Published
1999
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26. Canadian Guidelines: Preferable Future Practices in Programming for Gifted Learners.

Author

Lipp, M. and Casswel, C.

Abstract

This paper describes guidelines for education of gifted learners in Canada, prepared by 85 policymakers at a 1988 symposium. The guidelines focus on 10 challenges: change, client interests, communication, leadership, learning, policy, programing, research, technology, and values. Quality indicators in program development are outlined, as follows: inclusive, integrated, collaborative, altruistic, autonomous, and generative. (JDD)

Published
1990

49. FeynGame

Author

Harlander, R.V., primary, Klein, S.Y., additional, and Lipp, M., additional

Published
2020
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