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286 results on '"Morris, M C"'

1. Time dilation in relativistic two-particle interactions

Author

Shields, B. T., Morris, M. C., Ware, M. R., Su, Q., Stefanovich, E. V., and Grobe, R.

Subjects
General Relativity and Quantum Cosmology, Physics - Classical Physics
Abstract

We study the orbits of two interacting particles described by a fully relativistic classical mechanical Hamiltonian. We use two sets of initial conditions. In the first set (dynamics 1) the system's center of mass is at rest. In the second set (dynamics 2) the center of mass evolves with velocity V. If dynamics 1 is observed from a reference frame moving with velocity -V, the principle of relativity requires that all observables must be identical to those of dynamics 2 seen from the lab frame. Our numerical simulations demonstrate that kinematic Lorentz space-time transformations fail to transform particle observables between the two frames. This is explained as a result of the inevitable interaction-dependence of the boost generator in the instant form of relativistic dynamics. In spite of general inaccuracies of Lorentz formulas, the orbital periods are correctly predicted by the Einstein's time dilation factor for all interaction strengths., Comment: 14 pages, 1 figure

Published
2013
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4. In the News

Author

Sahu, K. C., Oganessian, Yu. Ts., Morris, M. C., Chiappe, L. M., Bertelli, S., Plotnik, J. M., de Waal, F. B. M., Reiss, D., Poinar, G. O., Danforth, B. N., and Schurig, D.

Published
2007

10. 3rd IANA (International Academy on Nutrition and Aging) Meeting Nutrition, Exercise & Alzheimer and Clinical Trials on Sarcopenia August 1–2, 2008 Hyatt Regency Tamaya Resort 1300 Tuyuna Trail Santa Ana Pueblo, NM USA

Author

Andrieu, S., Barberger-Gateau, P., Raffaitin, C., Berr, C., Tzourio, C., Dartigues, J. -F., Gin, H., Fitten, L. J., Ortiz, F., Fairbanks, L., Bartzokis, G., Lu, P., Ringman, J., Heyn, P. C., Locher, J. L., Salvà, A., Andrieu, S., Fernández, E., Vellas, B., van de Rest, O., Geleijnse, J. M., Kok, F. J., van Staveren, W. A., Beekman, A. T. F., Hoefnagels, W. H. L., de Groot, C. P. G. M., Angevaren, M., Aufdemkampe, G., Verhaar, H. J. J., Aleman, A., Vannees, L., Arkin, S., Florez, H., Gerstein, H., Sheridan, P., Bosch, J., Goldberg, R., Kaspar, K. M., Drawert, S. M., Marcus, R. L., Kidde, J., Dibble, L., Addison, O., LaStayo, P. C., Scarmeas, N., Stern, Y., Schupf, N., Luchsinger, J. A., Sharkey, J. R., Laditka, J. N., Laditka, S. B., Liu, R., Hochhalter, A., Robare, J. F., Türner, N., Judge, M., Foster, T. C., Erdos, B., Cudykier, I., Scarpace, P. J., Weiss, L. A., Bergstrom, J., Kritz-Silverstein, D., Barrett-Connor, Elizabeth, Yurko-Mauro, K., Nelson, E., Quinn, J., Sattler, F. R., Castaneda-Sceppa, C., Binder, E. F., Schroeder, E. T., Wang, Y., Bhasin, S., Kawakubo, M., Stewart, Y., Hahn, C., Colletti, P., Roubenoff, R., Yarasheski, K. E., Azen, S. P., Aoki, Y., Yamamoto, T., Otuka, T., Blanc-Bisson, C., Bourdel-Marchasson, I., Bocock, M. A., Keller, H. H., Bowman, G., Baxter, J., Oken, B., Frei, B., Traber, M., Leonard, S., Kaye, J., Shannon, J., Quinn, J., Carlsson, M., Gustafson, Y., Eriksson, S., Littbrand, H., Håglin, L., Danthiir, V., Wilson, C., Nettelbeck, T., Burns, N., Wittert, G., Noakes, M., Clifton, P., DiMaria-Ghalili, R. A., Grieger, J. A., Nowson, C. A., Wattanapenpaiboon, N. T., Holstein, J., Robinson, C., Hartmann, C., Rueb, S., Heffel, L., Dintaman, S., Reynolds, J., Fleming, L., Crull, M., Goldey, J., Serper, L. L., Hubbard, R., Westengard, J., Horning, M., Ishige, Y., Aoki, Y., Keller, H. H., Keller, H. H., LaStayo, P. C., Marcus, R. L., Smith, S., Kidde, J., Dibble, L., Butler, C., Hill, M., LaStayo, P. C., Marcus, R. L., Dibble, L., Kidde, J., Peters, C., Meier, W., Laughlin, G. A., Kritz-Silverstein, D., von Muhlen, D., Barrett-Connor, E., Olariu, L., Petcu, M., Tulcan, C., Pup, M., Otilingam, P., Gate, M., Pasinetti, G. M., Ray, B., Chauhan, N. B., Bailey, J. A., Lahiri, D. K., Shatenstein, B., Kergoat, M. -J., Reid, I., Chicoine, M. -E., Vaz, L., Stewart, R., Sabbah, W., Tsakos, G., D’Aiuto, F., Watt, R. G., Sturman, M., Kelly, J., Fleischman, D., Leurgans, S., Bennett, D., Morris, M. C., Suominen, M. H., Muurinen, S., Soini, H., Pitkälä, K. H., Yamamoto, T., Fujinoki, C., and Aoki, Y.

Published
2008
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28. IANA task force on nutrition and cognitive decline with aging

Author

Gillette-Guyonnet, S., Abellan Kan, G., Andrieu, S., Barberger-Gateau, P., Berr, C., Bonnefoy, M., Dartigues, J. F., Lisette de Groot, Ferry, M., Galan, P., Hercberg, S., Jeandel, C., Morris, M. C., Nourhashemi, F., Payette, H., Poulain, J. P., Portet, F., Roussel, A. M., Ritz, P., Rolland, Y., and Vellas, B.

Subjects
Global Nutrition, Male, Wereldvoeding, Aging, vitamin-e, dietary-fat intake, Diet, life-style factors, Cognition, alpha-tocopherol, Alzheimer Disease, Risk Factors, controlled-trial, incident alzheimer-disease, folic-acid fortification, older persons, oxidative stress, Humans, Female, Nutritional Physiological Phenomena, plasma homocysteine, Cognition Disorders, VLAG, Aged
Abstract

Cognitive impairment can be influenced by a number of factors. The potential effect of nutrition has become a topic of increasing scientific and public interest. In particular, there are arguments that nutrients (food and/or supplements) such as vitamins, trace minerals, lipids, can affect the risk of cognitive decline and dementia, especially in frail elderly people at risk of deficiencies. Our objective in this paper is to review data relating diet to risk of cognitive decline and dementia, especially Alzheimer's disease (AD). We chose to focus our statements on homocysteine-related vitamins (B-vitamins), antioxidant nutrients (vitamins E and C, carotenoids, flavonoids, enzymatic cofactors) and dietary lipids. Results of epidemiological studies may sometimes appeared conflicting; however, certain associations are frequently found. High intake of saturated and trans-unsaturated (hydrogenated) fats were positively associated with increased risk of AD, whereas intake of polyunsaturated and monounsaturated fats were protective against cognitive decline in the elderly in prospective studies. Fish consumption has been associated with lower risk of AD in longitudinal cohort studies. Moreover, epidemiologic data suggest a protective role of the B-vitamins, especially vitamins B9 and B12, on cognitive decline and dementia. Finally, the results on antioxidant nutrients may suggest the importance of having a balanced combination of several antioxidant nutrients to exert a significant effect on the prevention of cognitive decline and dementia, while taking into account the potential adverse effects of these nutrients. There is no lack of attractive hypotheses to support research on the relationships between nutrition and cognitive decline. It is important to stress the need to develop further prospective studies of sufficiently long duration, including subjects whose diet is monitored at a sufficiently early stage or at least before disease or cognitive decline exist. Meta analyses should be developed, and on the basis of their results the most appropriate interventional studies can be planned. These studies must control for the greatest number of known confounding factors and take into account the impact of the standard social determinants of food habits, such as the regional cultures, social status, and educational level.

Published
2007

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