66 results on '"Froger, C."'
Search Results
2. Étude de la valeur pronostique des phénotypes vasculaires au diagnostic de l’artérite à cellules géantes
- Author
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Froger, C., primary and Espitia, O., additional
- Published
- 2022
- Full Text
- View/download PDF
3. La fiscalité face au temps
- Author
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Froger, C., Laboratoire de Recherches Juridique et Economique (LARJE), Université de la Nouvelle-Calédonie (UNC), and BUNC, Pole ID
- Subjects
[SHS.ECO] Humanities and Social Sciences/Economics and Finance ,[SHS.ECO]Humanities and Social Sciences/Economics and Finance ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2019
4. The MkII gas box divertor - a new design concept
- Author
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Altmann, H., primary, Deksnis, E., additional, Froger, C., additional, Lawson, S., additional, Lowry, C., additional, Peacock, A., additional, and Pick, M., additional
- Published
- 1997
- Full Text
- View/download PDF
5. Design of the MkII Divertor with large carbon-fibre composite (CFC) tiles
- Author
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Altmann, H., primary, Deksnis, E.B., additional, Fanthome, J., additional, Froger, C., additional, Lowry, C., additional, Mohanti, R., additional, Nilsen, M., additional, Peacock, A., additional, Pick, M.A., additional, Spencer, D., additional, Tivey, R.B., additional, and Vlases, G., additional
- Published
- 1995
- Full Text
- View/download PDF
6. THE JET PRELIMINARY TRITIUM EXPERIMENT
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REBUT, P, ADAMS, J, ALPER, B, ALTMANN, H, ANDERSEN, A, ANDREW, P, ALIARSHAD, S, BAILEY, W, BALET, B, BARABASCHI, P, BARANOV, Y, BARKER, P, BARNSLEY, R, BARONIAN, M, BARTLETT, D, BELL, A, BENALI, G, BERTOLI, P, BERTOLINI, E, BHATNAGAR, V, BICKLEY, A, BOND, D, BONICELLI, T, BOOTH, S, BOSIA, G, BOTMAN, M, BOUCHER, D, BOUCQUEY, P, BRANDON, M, BREGER, P, BRELEN, H, BREWERTON, W, BRINKSCHULTE, H, BROWN, T, BRUSATI, M, BUDD, T, BURES, M, BURTON, P, BUSINARO, T, BUTCHER, P, BUTTGEREIT, H, CALDWELLNICHOLS, C, CAMPBELL, D, CAMPLING, D, CARD, P, CELENTANO, G, CHALLIS, C, CHANKIN, A, CHERUBINI, A, CHIRON, D, CHRISTIANSEN, J, CHUILON, P, CLAESEN, R, CLEMENT, S, CLIPSHAM, E, COAD, J, COFFEY, I, COLTON, A, COMISKEY, M, CONROY, S, COOKE, M, COOPER, S, CORDEY, J, CORE, W, CORRIGAN, G, CORTI, S, COSTLEY, A, COTTRELL, G, COX, M, CRAWLEY, P, DACOSTA, O, DAVIES, N, DAVIES, S, DEBLANK, H, DEESCH, H, DEKOCK, L, DEKSNIS, E, DELIYANAKUS, N, DENNEHINNOV, G, DESCHAMPS, G, DICKSON, W, DIETZ, K, DINES, A, DMITRENKO, S, DMITRIEVA, M, DOBBING, J, DOLGETTA, N, DORLING, S, DOYLE, P, DUCHS, D, DUQUENOY, H, EDWARDS, A, EHRENBERG, J, EKEDAHL, A, ELEVANT, T, ERENTS, S, ERIKSSON, L, FAJEMIROKUN, H, FALTER, H, FREILING, J, FROGER, C, FROISSARD, P, FULLARD, K, GADEBERG, M, GALETSAS, A, GALBIATI, L, GAMBIER, D, GARRIBBA, M, GAZE, P, GIANNELLA, R, GIBSON, A, GILL, R, GIRARD, A, GONDHALEKAR, A, GOODALL, D, GORMEZANO, C, GOTTARDI, N, GOWERS, C, GREEN, B, HAANGE, R, HAIGH, A, HANCOCK, C, HARBOUR, P, HAWKES, N, HAYNES, P, HEMMERICH, J, HENDER, T, HOEKZEMA, J, HORTON, L, HOW, J, HOWARTH, P, HUART, M, HUGHES, T, HUGUET, M, HURD, F, IDA, K, INGRAM, B, IRVING, M, JACQUINOT, J, JAECKEL, H, JAEGER, J, JANESCHITZ, G, JANKOWICZ, Z, JARVIS, O, JENSEN, F, JONES, E, JONES, L, JONES, T, JUNGER, J, JUNIQUE, F, KAYE, A, KEEN, B, KEILHACKER, M, KERNER, W, KIDD, N, KONIG, R, KONSTANTELLOS, A, KUPSCHUS, P, LASSER, R, LAST, J, LAUNDY, B, LAUROTARONI, L, LAWSON, K, LENNHOLM, M, LINGERTAT, J, LITUNOVSKI, R, LOARTE, A, LOBEL, R, LOMAS, P, LOUGHLIN, M, LOWRY, C, MAAS, A, MACKLIN, B, MAGGI, C, MAGYAR, G, MARCHESE, V, MARCUS, F, MART, J, MARTIN, D, MARTIN, E, MARTINSOLIS, R, MASSMANN, P, MATTHEWS, G, MCBRYAN, H, MCCRACKEN, G, MERIGUET, P, MIELE, P, MILLS, S, MILLWARD, P, MINARDI, E, MOHANTI, R, MONDINO, P, MONTVAI, A, MORGAN, P, MORSI, H, MURPHY, G, NAVE, F, NEUDATCHIN, S, NEWBERT, G, NEWMAN, M, NIELSEN, P, NOLL, P, OBERT, W, OBRIEN, D, OROURKE, J, OSTROM, R, OTTAVIANI, M, PAPASTERGIOU, S, PASINI, D, PATEL, B, PEACOCK, A, PEACOCK, N, PEARCE, R, PEARSON, D, PEPEDESILVA, R, PERINIC, G, PERRY, C, PICK, M, PLANCOULAINE, J, POFFE, J, POHLCHEN, R, PORCELLI, F, PORTE, L, PRENTICE, R, PUPPIN, S, PUTVINSKII, S, RADFORD, G, RAIMONDI, T, RAMOSDEANDRADE, M, RAPISARDA, M, REICHLE, R, RICHARDS, S, RIGHI, E, RIMINI, F, ROLFE, A, ROSS, R, ROSSI, L, RUSS, R, SACK, H, SADLER, G, SAIBENE, G, SALANAVE, J, SANAZZARO, G, SANTAGIUSTINA, A, SARTORI, R, SBORCHIA, C, SCHILD, P, SCHMID, M, SCHMIDT, G, SCHROEPF, H, SCHUNKE, B, SCOTT, S, SIBLEY, A, SIMONINI, R, SIPS, A, SMEULDERS, P, SMITH, R, STAMP, M, STANGEBY, P, START, D, STEED, C, STORK, D, STOTT, P, STUBBERFIELD, P, SUMMERS, D, SUMMERS, H, SVENSSON, L, TAGLE, J, TANGA, A, TARONI, A, TERELLA, C, TESINI, A, THOMAS, P, THOMPSON, E, THOMSEN, K, TREVALION, P, TUBBING, B, TIBONE, F, VANDERBEKEN, H, VLASES, G, VONHELLERMANN, M, WADE, T, WALKER, C, WARD, D, WATKINS, M, WATSON, M, WEBER, S, WESSON, J, WIJNANDS, T, WILKS, J, WILSON, D, WINKEL, T, WOLF, R, WONG, D, WOODWARD, C, WYKES, M, YOUNG, I, ZANNELLI, L, ZOLFAGHARI, A, ZULLO, G, and ZWINGMANN, W
- Subjects
inorganic chemicals ,Jet (fluid) ,Tokamak ,Materials science ,Lawson criterion ,Joint European Torus ,Plasma ,Fusion power ,Condensed Matter Physics ,law.invention ,Nuclear physics ,Nuclear Energy and Engineering ,Deuterium ,law ,cardiovascular system ,Tritium - Abstract
The first tokamak discharges with deuterium-tritium mixtures have been carried out in the Joint European Torus (JET). The main objectives were to produce more than IMW of fusion power in a controlled way, to determine tritium retention in torus systems and to establish effective means of tritium removal. The experiments were undertaken within limits imposed by restrictions on vessel activation and tritium usage. Deuterium plasmas were heated by high power deuterium neutral beams from fourteen sources and fuelled by two neural beam sources injecting tritium. In the best (D-T discharge), the tritium concentration was about 11% at peak performance, when total neutron emission rate was 6.0*1017 s-1, with 1.7 MW of fusion power. The fusion amplification factor QDT was 0.15. With optimum tritium concentration, this pulse would have produced a fusion power approximately=5 MW and nominal QDT=0.46. The same extrapolation for the best pure deuterium discharge gives about 11 MW and a nominal QDT=1.14. Techniques for introducing, tracking, monitoring and recovering tritium were highly effective.
- Published
- 2016
7. INTEGRATED ENGINEERING DESIGN OF NEW IN-VESSEL COMPONENTS
- Author
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PICK, M.A., primary, CELENTANO, G., additional, DIETZ, K.J., additional, FROGER, C., additional, ROSSI, L., additional, SHAW, R., additional, and SONNERUP, L., additional
- Published
- 1989
- Full Text
- View/download PDF
8. MANUFACTURE, TESTING AND ASSEMBLY PREPARATION OF THE JET VACUUM VESSEL
- Author
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Arbez, J., primary, Bäumel, S., additional, Dean, J.R., additional, Duesing, G., additional, Froger, C., additional, Hemmerich, J.L., additional, Walravens, M., additional, Walter, K., additional, and Winkel, T., additional
- Published
- 1983
- Full Text
- View/download PDF
9. FULL POWER OPERATION AT JET: CONSEQUENCES FOR IN-VESSEL COMPONENTS
- Author
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PICK, M.A., primary, CELENTANO, G., additional, DEKSNIS, E., additional, DIETZ, K.J., additional, FROGER, C., additional, HUGON, M., additional, HUGUET, M., additional, REBUT, P.H., additional, SHAW, R., additional, SONNERUP, L., additional, and STOTT, P., additional
- Published
- 1989
- Full Text
- View/download PDF
10. Evaluation and validation of two microbiological tests for screening antibiotic residues in honey according to the European guideline for the validation of screening methods
- Author
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Gaudin, V., primary, De Courville, A., additional, Hedou, C., additional, Rault, A., additional, Diomandé, S.E., additional, Creff-Froger, C., additional, and Verdon, E., additional
- Published
- 2013
- Full Text
- View/download PDF
11. Fusion Energy-Production from a Deuterium-Tritium Plasma in the Jet Tokamak
- Author
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Rebut, Ph, Gibson, A., Huguet, M., Adams, Jm, Alper, B., Altmann, H., Andersen, A., Andrew, P., Angelone, M., Aliarshad, S., Baigger, P., Bailey, W., Balet, B., Barabaschi, P., Barker, P., Barnsley, R., Baronian, M., Bartlett, Dv, Baylor, L., Bell, Ac, Benali, G., Bertoldi, P., Bertolini, E., Bhatnagar, V., Bickley, Aj, Binder, D., Bindslev, H., Bonicelli, T., Booth, Sj, Bosia, G., Botman, M., Boucher, D., Boucquey, P., Breger, P., Brelen, H., Brinkschulte, H., Brooks, D., Brown, A., Brown, T., Brusati, M., Bryan, S., Brzozowski, J., Buchse, R., Budd, T., Bures, M., Businaro, T., Butcher, P., Buttgereit, H., Caldwellnichols, C., Campbell, Dj, Card, P., Celentano, G., Challis, Cd, Chankin, Av, Cherubini, A., Chiron, D., Christiansen, J., Chuilon, P., Claesen, R., Clement, S., Clipsham, E., Coad, Jp, Coffey, Ih, Colton, A., Comiskey, M., Conroy, S., Cooke, M., Cooper, D., Cooper, S., Cordey, Jg, Core, W., Corrigan, G., Corti, S., Costley, Ae, Cottrell, G., Cox, M., Cripwell, P., Dacosta, O., Davies, J., Davies, N., Deblank, H., Deesch, H., Dekock, L., Deksnis, E., Delvart, F., Dennehinnov, Gb, Deschamps, G., Dickson, Wj, Dietz, Kj, Dmitrenko, Sl, Dmitrieva, M., Dobbing, J., Doglio, A., Dolgetta, N., Dorling, Se, Doyle, Pg, Duchs, Df, Duquenoy, H., Edwards, A., Ehrenberg, J., Ekedahl, A., Elevant, T., Erents, Sk, Eriksson, Lg, Fajemirokun, H., Falter, H., Freiling, J., Freville, F., Froger, C., Froissard, P., Fullard, K., Gadeberg, M., Galetsas, A., Gallagher, T., Gambier, D., Garribba, M., Gaze, P., Giannella, R., Gill, Rd, Girard, A., Gondhalekar, A., Goodall, D., Gormezano, C., Gottardi, Na, Gowers, C., Green, Bj, Grievson, B., Haange, R., Haigh, A., Hancock, Cj, Harbour, Pj, Hartrampf, T., Hawkes, Nc, Haynes, P., Hemmerich, Jl, Hender, T., Hoekzema, J., Holland, D., Hone, M., Horton, L., How, J., Huart, M., Hughes, I., Hughes, Tp, Hugon, M., Huo, Y., Ida, K., Ingram, B., Irving, M., Jacquinot, J., Jaeckel, H., Jaeger, Jf, Janeschitz, G., Jankovicz, Z., Jarvis, On, Jensen, F., Jones, Em, Jones, Hd, Jones, Lpdf, Jones, S., Jones, Ttc, Junger, Jf, Junique, F., Kaye, A., Keen, Be, Keilhacker, M., Kelly, Gj, Kerner, W., Khudoleev, A., Konig, R., Konstantellos, A., Kovanen, M., Kramer, G., Kupschus, P., Lasser, R., Last, Jr, Laundy, B., Laurotaroni, L., Laveyry, M., Lawson, K., Lennholm, M., Lingertat, J., Litunovski, Rn, Alberto Loarte, Lobel, R., Lomas, P., Loughlin, M., Lowry, C., Lupo, J., Maas, Ac, Machuzak, J., Macklin, B., Maddison, G., Maggi, Cf, Magyar, G., Mandl, W., Marchese, V., Marcon, G., Marcus, F., Mart, J., Martin, D., Martin, E., Martinsolis, R., Massmann, P., Matthews, G., Mcbryan, H., Mccracken, G., Mckivitt, J., Meriguet, P., Miele, P., Miller, A., Mills, J., Mills, Sf, Millward, P., Milverton, P., Minardi, E., Mohanti, R., Mondino, Pl, Montgomery, D., Montvai, A., Morgan, P., Morsi, H., Muir, D., Murphy, G., Myrnas, R., Nave, F., Newbert, G., Newman, M., Nielsen, P., Noll, P., Obert, W., Obrien, D., Orchard, J., Orourke, J., Ostrom, R., Ottaviani, M., Pain, M., Paoletti, F., Papastergiou, S., Parsons, W., Pasini, D., Patel, D., Peacock, A., Peacock, N., Pearce, Rjm, Pearson, D., Peng, Jf, Desilva, Rp, Perinic, G., Perry, C., Petrov, M., Pick, Ma, Plancoulaine, J., Poffe, Jp, Pohlchen, R., Porcelli, F., Porte, L., Prentice, R., Puppin, S., Putvinskii, S., Radford, G., Raimondi, T., Deandrade, Mcr, Reichle, R., Reid, J., Richards, S., Righi, E., Rimini, F., Robinson, D., Rolfe, A., Ross, Rt, Rossi, L., Russ, R., Rutter, P., Sack, Hc, Sadler, G., Saibene, G., Salanave, Jl, Sanazzaro, G., Santagiustina, A., Sartori, R., Sborchia, C., Schild, P., Schmid, M., Schmidt, G., Schunke, B., Scott, Sm, Serio, L., Sibley, A., Simonini, R., Sips, Acc, Smeulders, P., Smith, R., Stagg, R., Stamp, M., Stangeby, P., Stankiewicz, R., Start, Df, Steed, Ca, Stork, D., Stott, Pe, Stubberfield, P., Summers, D., Summers, H., Svensson, L., Tagle, Ja, Talbot, M., Tanga, A., Taroni, A., Terella, C., Terrington, A., Tesini, A., Thomas, Pr, Thompson, E., Thomsen, K., Tibone, F., Tiscornia, A., Trevalion, P., Tubbing, B., Vanbelle, P., Vanderbeken, H., Vlases, G., Vonhellermann, M., Wade, T., Walker, C., Walton, R., Ward, D., Watkins, Ml, Watkins, N., Watson, Mj, Weber, S., Wesson, J., Wijnands, Tj, Wilks, J., Wilson, D., Winkel, T., Wolf, R., Wong, D., Woodward, C., Wu, Y., Wykes, M., Young, D., Young, Id, Zannelli, L., Zolfaghari, A., and Zwingmann, W.
- Abstract
The paper describes a series of experiments in the Joint European Torus (JET), culminating in the first tokamak discharges in deuterium-tritium fuelled mixtures. The experiments were undertaken within limits imposed by restrictions on vessel activation and tritium usage. The objectives were: (i) to produce more than one megawatt of fusion power in a controlled way; (ii) to validate transport codes and provide a basis for accurately predicting the performance of deuterium-tritium plasma from measurements made in deuterium plasmas; (iii) to determine tritium retention in the torus systems and to establish the effectiveness of discharge cleaning techniques for tritium removal; (iv) to demonstrate the technology related to tritium usage; and (v) to establish safe procedures for handling tritium in compliance with the regulatory requirements. A single-null X-point magnetic configuration, diverted onto the upper carbon target, with reversed toroidal magnetic field was chosen. Deuterium plasmas were heated by high power, long duration deuterium neutral beams from fourteen sources and fuelled also by up to two neutral beam sources injecting tritium. The results from three of these high performance hot ion H-mode discharges are described: a high performance pure deuterium discharge; a deuterium-tritium discharge with a 1% mixture of tritium fed to one neutral beam source; and a deuterium-tritium discharge with 100% tritium fed to two neutral beam sources. The TRANSP code was used to check the internal consistency of the measured data and to determine the origin of the measured neutron fluxes. In the best deuterium-tritium discharge, the tritium concentration was about 11% at the time of peak performance, when the total neutron emission rate was 6.0 x 10(17) neutrons/s. The integrated total neutron yield over the high power phase, which lasted about 2 s, was 7.2 x 10(17) neutrons, with an accuracy of +/- 7%. The actual fusion amplification factor, Q(DT), was about 0.15. With an optimum tritium concentration, this pulse would have produced a fusion power of almost-equal-to 5 MW and a nominal Q(DT) almost-equal-to 0.46. The same extrapolation for the pure deuterium discharge would have given almost-equal-to 11 MW and a nominal Q(DT) = 1.14, so that the total fusion power (neutrons and alpha-particles) would have exceeded the total losses in the equivalent deuterium-tritium discharge in these transient conditions. Techniques for introducing, tracking, monitoring and recovering tritium were demonstrated to be highly effective: essentially all of the tritium introduced into the neutral beam system and, so far, about two thirds of that introduced into the torus have been recovered.
- Published
- 1992
12. The new first wall configuration of JET.
- Author
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Pick, M.A., Altmann, H., Andrew, P., Celentano, G., Froger, C., Graham, J., Hurd, F., Israel, G., Lomas, P., Macklin, B., Martin, E., Middleton, R., Miele, P., Mohanti, R., Noll, P., Parsons, W.J., Peacock, A.T., Rossi, L., Sborchia, C., and Scott, S.M.
- Published
- 1993
- Full Text
- View/download PDF
13. A NEW DEVICE FOR MEASURING RESPIRABLE DUST IN UNDERGROUND MINES-THE CP.M.
- Author
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Courbon, P., Froger, C., and Martin, J. C.
- Published
- 1972
- Full Text
- View/download PDF
14. Dust-laden airflow control applied to worker protection: scale model study of a steep seam working.
- Author
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Froger C., Third international mine ventilation congress Harrogate 13-Jun-8419-Jun-84, Courbon P., Koniuta A., Froger C., Third international mine ventilation congress Harrogate 13-Jun-8419-Jun-84, Courbon P., and Koniuta A.
- Published
- 1984
15. High performance Joint European Torus (JET) plasmas for deuterium-tritium operation with the MkII divertor
- Author
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Jones, T. T. C., Adams, J. M., Ageladarakis, P., AliArshad, S., Alper, B., Altmann, H., Andrew, P., Bainbridge, N., Bak, P., Balet, B., Baranov, Y., Barker, P., Barnsley, R., Baronian, M., Barth, K., Bartlett, D. V., Bell, A. C., Bertolini, E., Bhatnagar, V., Bickley, A. J., Bindslev, H., Blackler, K., Bond, D., Bonicelli, T., Borba, D., Brandon, M., Breger, P., Brelen, H., Brennan, P., Brewerton, W. J., Browne, M. L., Budd, T., Burt, A., Burton, P., Businaro, T., Buzio, M., CaldwellNichols, C., Campbell, D. J., Campling, D., Card, P., Celentano, G., Challis, C. D., Chankin, A. V., Cherubini, A., Chiron, D., Christiansen, J., Chuilon, P., Ciric, D., Claesen, R., Clarke, H. E., Clement, S., Coad, J. P., Cocilovo, U., Coffey, I., Conway, G., Cooper, S., Cordey, J. G., Corrigan, G., Cottrell, G., Cox, M., Crawley, P., Cusack, R., Davies, N., Davies, S. J., Davis, J. J., deBenedetti, M., deEsch, H., deHaas, J., Deksnis, E., Deliyanakis, N., diMarchi, E., Dines, A., Dmitrenko, S. L., Dobbing, J., Dolgetta, N., Dorling, S. E., Doyle, P. G., Duquenoy, H., Edwards, A. M., Edwards, A. W., Egedal, J., Ehrenberg, J., Ekedahl, A., Elevant, T., Ellis, J., Endler, M., Erents, S. K., Eriksson, L. G., Falter, H., Farthing, J. W., Fasoli, A., Fechner, B., Fichmuller, M., Fischer, B., Fishpool, G., Froger, C., Fullard, K., Gadeberg, M., Galbiati, L., Gauthier, E., Giannella, R., Gibson, A., Gill, R. D., Godden, D., Gondhalekar, A., Goniche, M., Goodall, D., Gormezano, C., Gowers, C., Graham, J., Guenther, K., Guirlet, R., Guo, H., Haigh, A., Haist, B., Hancock, C. J., Harbour, P. J., Hawkes, N. C., Hawkes, N. P., Hemmerich, J. L., Hender, T., Hoekzema, J., Horton, L., How, J., Howman, A., Huart, M., Hughes, T. P., Hurd, F., Huysmans, G., Hwang, A., Ibbott, C., Ingesson, C., Ingram, B., Irving, M., Jacquinot, J., Jaeckel, H., Jaeckel, P., Jaeger, J. F., Jarvis, I. N., Jensen, F., Johnson, M., Jones, E. M., Jones, Lpdf, Junger, J. F., Junique, F., Kaye, A., Keen, B. E., Keilhacker, M., Kerner, W., Kidd, N. G., King, Q. A., Knipe, S., Koenig, R., Krom, J. G., Kubo, H., Kupschus, P., Lamalle, P., Lasser, R., Last, J. R., LauroTaroni, L., Lawson, K., Lennholm, M., Lingertat, J., Loarte, A., Lomas, P. J., Loughlin, M., Lovegrove, T., Lowry, C., Maas, A. C., Macklin, B., Maggi, C. F., Mantsinen, M., Marchese, V., Marcus, F., Mart, J., Martin, D., Martin, T., Mathews, G., McBryan, H., McCormick, G., McCracken, G., McCullen, P. A., Meigs, A., Miele, P., Milani, F., Mills, J., Mohanti, R., Monk, R., Morgan, P., Muir, D., Murphy, G., Nave, F., Newbert, G., Nielsen, P., Noll, P., Obert, W., Obrien, D., Oord, E., Ostrom, R., Ottaviani, M., Papastergiou, S., Parail, V. V., Parkinson, R., Parsons, W., Patel, B., Paynter, A., Peacock, A., Peacock, N., Pearce, R. J. H., Perry, C., Pick, M. A., Plancoulaine, J., Pogutse, O., Porte, L., Prentice, R., Puppin, S., Radford, G., Raimondi, T., Reichle, R., Riccardo, V., Righi, E., Rimini, F., Rolfe, A., Rookes, A., Ross, R. T., Rossi, A., Rossi, L., Sadler, G., Saibene, G., Salisbury, M., Santagiustina, A., Sartori, F., Sartori, R., Saunders, R., Schild, P., Schmid, M., Schmidt, V., Schokker, B., Schunke, B., Scibile, M., Scott, S. M., Sharapov, S., Sibley, A., Simonini, R., Sips, A. C. C., Smeulders, P., Smith, O., Smith, P., Smith, R., Soldner, F., Spence, J., Springmann, E., Stamp, M., Stangeby, P., Start, D. F., Stork, D., Stott, P. E., Stubberfield, P., Summers, D., Svensson, L., Svensson, P., Tabasso, A., Tabellini, M., Tait, J., Tanga, A., Taroni, A., Terella, C., Thomas, P. R., Thomsen, K., Tubbing, B., UlHaq, Y., Vadgama, A., vanBelle, P., vanderLinden, R., Vlases, G., vonHellermann, M., Wade, T., Walton, R., Ward, D., Watkins, M. L., Watkins, N., Watson, M. J., Wesson, J., Wheatley, M., Wilson, D., Winkel, T., Woodward, C., Young, D., Young, I. D., Yu, Q., Zannelli, F., Zastrow, K. D., Zhang, W., Zornig, N., and Zwingmann, W.
- Subjects
Nuclear physics ,Physics ,Thermonuclear fusion ,Deuterium ,Neutron emission ,Physics::Plasma Physics ,JET ,Divertor ,Joint European Torus ,Neutron ,Plasma ,Magnetohydrodynamics ,Condensed Matter Physics - Abstract
Planned experiments in the Joint European Torus [Plasma Physics and Controlled Fusion Research, Proceedings, 13th International Conference, Washington, D.C., 1990 (International Atomic Energy Agency, Vienna, 1991), Vol. 1, p. 27] (JET) with deuterium-tritium (D-T) plasmas require high fusion performance for alpha-particle heating studies and for investigation of isotope dependence in conditions relevant to the International Thermonuclear Experimental Reactor [Plasma Phys. Controlled Fusion 37, A19 (1995)]. In deuterium plasmas, the highest neutron rates have been obtained in the hot-ion high-confinement mode (H mode) which is ultimately limited by magnetohydrodynamic (MHD) phenomena when the pressure gradient approaches ideal ballooning and kink stability limits in the vicinity of the edge transport barrier. Results are reported confirming the MkII divertor's increased closure and pumping in this regime, progress in understanding the MHD-related termination is discussed, and the use of ion cyclotron resonance heating (ICRH) in combination with high-power neutral beams to increase the neutron yield is described. In separate experiments internal transport barriers have been established through careful programming of the current ramp and heating waveforms, and neutron emission comparable with the best hot-ion II-modes achieved. Steady-state II-mode discharges exhibiting edge localized modes (ELMs) in reactor-like configurations and conditions have been demonstrated, including cases in which relevant dimensionless parameter values are preserved, ready also for testing in D-T. (C) 1997 American institute of Physics.
16. JET - PROGRESS IN PERFORMANCE AND UNDERSTANDING
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Keilhacker, M., Adams, Jm, Altmann, H., Andersen, A., Andrew, P., Angelone, M., Arshad, Sa, Bailey, W., Ballantyne, P., Balet, B., Barabaschi, P., Barnsley, R., Baronian, M., Bartlett, Dv, Bell, Ac, Benfatto, I., Benali, G., Bergsaker, H., Bertoldi, P., Bertolini, E., Bhatnagar, V., Bickley, Aj, Bindslev, H., Bonicelli, T., Booth, Sj, Bosia, G., Botman, M., Boucher, D., Boucquey, P., Breger, P., Brelen, H., Brinkschulte, H., Brown, T., Brusati, M., Budd, T., Bures, M., Businaro, T., Butcher, P., Buttgereit, H., Caldwellnichols, C., Campbell, Dj, Card, P., Celentano, G., Challis, Cd, Chankin, Av, Chiron, D., Christiansen, J., Christodoulopoulos, C., Chuilon, P., Claesen, R., Clement, S., Clipsham, E., Coad, Jp, Comiskey, M., Conroy, S., Cooke, M., Cooper, S., Cordey, Jg, Core, W., Corrigan, G., Corti, S., Costley, Ae, Cottrell, G., Cox, M., Cripwell, P., Deblank, H., Deesch, H., Dekock, L., Deksnis, E., Dennehinnov, Gb, Deschamps, G., Dietz, Kj, Dmitrenko, Sl, Dobbing, J., Dolgetta, N., Dorling, Se, Doyle, Pg, Duchs, Df, Duquenoy, H., Edwards, A., Ehrenberg, J., Ekedahl, A., Elevant, T., Erents, Sk, Eriksson, Lg, Fajemirokun, H., Falter, H., Flory, D., Freiling, J., Froger, C., Froissard, P., Fullard, K., Gadeberg, M., Galetsas, A., Gambier, D., Garribba, M., Gaze, P., Giannella, R., Gibson, A., Gill, Rd, Girard, A., Gondhalekar, A., Gormezano, C., Gottardi, Na, Gowers, C., Green, Bj, Haange, R., Haas, G., Haigh, A., Gregory Hammett, Hancock, Cj, Harbour, Pj, Hawkes, Nc, Haynes, P., Hemmerich, Jl, Hender, T., Herzog, Fb, Herzog, Rf, Hoekzema, J., How, J., Huart, M., Hughes, I., Hughes, Tp, Hugon, M., Huguet, M., Hwang, A., Ingram, B., Irving, M., Jacquinot, J., Jaeckel, H., Jaeger, Jf, Janeschitz, G., Jankowicz, S., Jarvis, On, Jensen, F., Jones, Em, Jones, Lpdf, Jones, Ttc, Junger, Jf, Junique, E., Kaye, A., Keen, Be, Kelly, Gj, Kerner, W., Konig, R., Konstantellos, A., Kovanen, M., Kramer, G., Kupschus, P., Lasser, R., Last, Jr, Laundy, B., Laurotaroni, L., Lawson, K., Lennholm, M., Loarte, A., Lobel, R., Lomas, P., Loughlin, M., Lowry, C., Macklin, B., Maddison, G., Magyar, G., Mandl, W., Marchese, V., Marcus, F., Mart, J., Martin, E., Martinsolis, R., Massmann, P., Mccracken, G., Meriguet, P., Miele, P., Mills, Sf, Millward, P., Mohanti, R., Mondino, Pl, Montvai, A., Moriyama, S., Morgan, P., Morsi, H., Murphy, G., Mynarends, M., Myrnas, R., Nardone, C., Nave, F., Newbert, G., Newman, M., Nielsen, P., Noll, P., Obert, W., Obrien, D., Orourke, J., Ostrom, R., Ottaviani, M., Pain, M., Paoletti, F., Papastergiou, S., Pasini, D., Peacock, A., Peacock, N., Pearson, D., Desilva, Rp, Perinic, G., Perry, C., Pick, M., Pitts, R., Plancoulaine, J., Poffe, Jp, Porcelli, F., Porte, L., Prentice, R., Puppin, S., Putvinsko, S., Radford, G., Raimondi, T., Deandrade, Mcr, Rebut, Ph, Reichle, R., Righi, E., Rimini, F., Robinson, D., Rolfe, A., Ross, Rt, Rossi, L., Russ, R., Rutter, P., Sack, Hc, Sadler, G., Saibene, G., Salanave, Jl, Sanazzaro, G., Santagiustina, A., Sartori, R., Sborchia, C., Schild, P., Schmid, M., Schmidt, G., Schunke, B., Scott, Sm, Sibley, A., Simonini, R., Sips, Acc, Smeulders, P., Stankiewicz, R., Stamp, M., Stangeby, P., Start, Df, Steed, Ca, Stork, D., Stott, Pe, Stringer, Te, Stubberfield, P., Summers, D., Summers, H., Svensson, L., Tagle, Ja, Tanga, A., Taroni, A., Tesini, A., Thomas, Pr, Thompson, E., Thomsen, K., Todd, Jm, Trevalion, P., Tubbing, B., Tibone, F., Usselmann, E., Vanderbeken, H., Vlases, G., Vonhellermann, M., Wade, T., Walker, C., Walton, R., Ward, D., Watkins, Ml, Watson, Mj, Weber, S., Wesson, J., Wijnands, Tj, Wilks, J., Wilson, D., Winkel, T., Wolf, R., Wolle, B., Wong, D., Woodward, C., Wu, Y., Wykes, M., Young, Id, Zannelli, L., Zhu, Y., and Zwingmann, W.
17. First Results with the Modified Jet - the Jet Team
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Adams, J. M., Agarici, Y., Ageladarakis, P., Alper, B., Altmann, H., Andrew, P., Aliarshad, S., Bailey, W., Balet, B., Baranov, Y., Barker, P., Barnsley, R., Baronian, M., Bartlett, D. V., Bell, A. C., Benali, G., Bertolini, E., Bhatnagar, V., Bickley, A. J., Bindslev, H., Blackler, K., Bond, D., Bonicelli, T., Borras, K., Boucquey, P., Brandon, M., Breger, P., Brelen, H., Brewerton, W. J., Brown, T., Budd, T., Bures, M., Burton, P., Businaro, T., Buttgereit, H., Caldwellnichols, C., Campbell, D. J., Campling, D., Card, P., Cecil, F., Celentano, G., Challis, C. D., Chiron, D., Christiansen, J., Chuilon, P., Claesen, R., Clement, S., Coad, J. P., Colombi, S., Cooke, M., Cooper, S., Cordey, J. G., Cottrell, G., Cox, M., Crawley, P., Dacosta, O., Cusack, R., Dantona, G., Davies, N., Davies, S. J., Davis, J. J., Deesch, H., Deksnis, E., Deliyanakis, N., Dines, A., Dmitrenko, S. L., Dobbing, J., Dolgetta, N., Dorling, S. E., Doyle, P. G., Duquenoy, H., Edwards, A., Ehrenberg, J., Ekedahl, A., Elevant, T., Erents, S. K., Eriksson, L. G., Falter, H., Fasoli, A., Fechner, B., Fischer, B., Fishpool, G., Freiling, J., Froger, C., Froissard, P., Fullard, K., Gadeberg, M., Galbiati, L., Garribba, M., Gerstel, U., Giannella, R., Gibson, A., Gill, R. D., Goulding, R., Gondhalekar, A., Goodall, D., Gormezano, C., Gottardi, N. A., Gowers, C., Grisolia, C., Guo, H., Haigh, A., Hancock, C. J., Harbour, P. J., Hawkes, N. C., Hawkes, N. P., Hemmerich, J. L., Hender, T., Hoekzema, J., Horton, L., How, J., Howarth, P. J., Howman, A., Huart, M., Hutchinson, I., Hughes, T. P., Hurd, F., Ingram, B., Irving, M., Ishida, S., Jacquinot, J., Jaeckel, H., Jaeger, J. F., Jarvis, O. N., Jensen, F., Johnson, M., Jones, E. M., Jones, Lpdf, Jones, T. T. C., Junger, J. F., Junique, F., Kaye, A., Keen, B. E., Keilhacker, M., Kerner, W., Kidd, N. G., Konig, R., Kupschus, P., Lamalle, P., Lasser, R., Last, J. R., Laurotaroni, L., Laviron, C., Lawson, K., Lazzaro, E., Lennholm, M., Lingertat, J., Lomas, P., Loughlin, M., Lowry, C., Lyadina, E., Maas, A. C., Macklin, B., Maggi, C. F., Marchese, V., Marcus, F., Mart, J., Martin, D., Martin, T., Matthews, G., McBryan, H., McCormick, G., Meigs, A., Milani, S., Monk, R., Morgan, P., Murphy, G., Nave, F., Newbert, G., Nguyen, F., Nielsen, P., Noll, P., Obert, W., Obrien, D., Oord, E., Ostrom, R., Ottaviani, M., Papastergiou, S., Parail, V. V., Patel, B., Peacock, A., Peacock, N., Pearce, R. J. M., Perry, C., Pick, M. A., Plancoulaine, J., Pogutse, O., Poffe, J. P., Porcelli, F., Porte, L., Prentice, R., Puppin, S., Radford, G., Raimondi, T., Reichle, R., Richards, S., Righi, E., Rimini, F., Rolfe, A., Rookes, A., Ross, R. T., Rossi, A., Rossi, L., Russ, R., Sadler, G., Saibene, G., Salisbury, M., Sanazzaro, G., Santagiustina, A., Sartori, F., Sartori, R., Savrukhin, P., Schaffer, M., Schild, P., Schmid, M., Schunke, B., Scott, S. M., Sharapov, S., Shaw, R. L., Sibley, A., Simonini, R., Sips, A. C. C., Smeulders, P., Smith, R., Soldner, F., Stamp, M., Stangeby, P., Start, D. F., Steed, C. A., Stork, D., Stott, P. E., Stubberfield, P., Summers, D., Summers, H., Suverkropp, W., Svensson, L., Szabo, T., Tabellini, M., Tanga, A., Taroni, A., Terella, C., Tesini, A., Thomas, P. R., Thompson, E., Thomsen, K., Tubbing, B., Vanderbeken, H., Vandergoot, E., Vayakis, G., Vlases, G., Vonhellermann, M., Wade, T., Walker, C., Ward, D., Watkins, M. L., Watkins, N., Watson, M. J., Weber, S., Wesson, J., Wilson, D., Winkel, T., Wolf, R., Woodward, C., Young, I. D., Zannelli, L., Zornig, N., and Zwingmann, W.
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JET - Abstract
JET was extensively modified in the 1992/93 shutdown. The new pumped divertor and many new systems were brought into operation early in 1994. Operations have progressed to 4MA plasma current and, with substantial additional heating, H-mode confinement results confirm the expected scaling. The high power handling capability of the pumped divertor with sweeping is estimated at 20MW for 20s. H-mode plasmas have large Type I ELMs. With lower hybrid heating alone, 2MA full current drive has been achieved with good efficiency, with ICRF power, effective heating and direct electron heating have been demonstrated.
18. Controlling the flow of dust-filled air with a view to protecting mining personnel - study based on a scale model of a steep working.
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Froger C., Courbon P., Koniuta A., Froger C., Courbon P., and Koniuta A.
19. Strategy for fire safety.
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Cwiklinski C., Bigourd J., Froger C., Lodel R., Cwiklinski C., Bigourd J., Froger C., and Lodel R.
20. Practical use of microcomputers for ventilation calculations.
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d'Albrand N., Third international mine ventilation congress Harrogate 13-Jun-8419-Jun-84, Froger C., Josien J-P., d'Albrand N., Third international mine ventilation congress Harrogate 13-Jun-8419-Jun-84, Froger C., and Josien J-P.
21. Microcomputers contribute to safety in mines.
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Froger C., Saint P.Y., Froger C., and Saint P.Y.
- Abstract
A system of computer control, which will contribute to safety in mines, is discussed., A system of computer control, which will contribute to safety in mines, is discussed.
22. Forces on the JET Vacuum Vessel During Disruptions and Consequent Operational Limits
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Noll, P, primary, Sonnerup, L, additional, Froger, C, additional, Huguet, M, additional, and Last, J, additional
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- 1989
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23. Plasma heating in JET
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Ainsworth, A, primary, Altmann, H, additional, Anderson, R J, additional, Arbez, J, additional, Bartlett, D, additional, Bailey, W, additional, Behringer, K, additional, Bertolini, E, additional, Bertoldi, P, additional, Best, C H, additional, Bhatnagar, V, additional, Bickerton, R J, additional, Boissin, G, additional, Bonicelli, T, additional, Booth, S, additional, Boschi, A, additional, Bosia, G, additional, Botman, M, additional, Brelen, H, additional, Brinkschulte, H, additional, Browne, M L, additional, Brusati, M, additional, Budd, T, additional, Bures, M, additional, Butcher, P, additional, Buttgereit, H, additional, Cacaut, D, additional, Caldwell-Nichols, C, additional, Campbell, D, additional, Carwardine, J, additional, Celentano, G, additional, Challis, C D, additional, Cheetman, A, additional, Christiansen, J, additional, Christodoulopoulos, C, additional, Chuilon, P, additional, Claesen, R, additional, Coad, J P, additional, Cooke, M, additional, Cordey, J G, additional, Core, W, additional, Corti, S, additional, Costley, A E, additional, Cottrell, G, additional, Dean, J, additional, Deksnis, E, additional, Deschamps, G, additional, Dietz, K J, additional, Dobbing, J, additional, Dorling, S E, additional, Duechs, D F, additional, Duesing, G, additional, Duquenoy, H, additional, Kock, L de, additional, Edwards, A, additional, Engelhardt, W, additional, Erhorn, F, additional, Eriksson, B, additional, Falter, H, additional, Hellsten, T, additional, Hemmerich, J L, additional, Hemsworth, R, additional, Hendriks, F, additional, Herzog, R F, additional, Horton, L, additional, How, J, additional, Huart, M, additional, Hubbard, A, additional, Hugon, M, additional, Jones, P, additional, Kaeline, J, additional, Kaellne, A, additional, Kaye, A, additional, Keen, B E, additional, Keilhacker, M, additional, Kinahan, G, additional, Konstantellos, A, additional, Kupschus, P, additional, Lallia, P, additional, Last, J R, additional, Foden, N, additional, Froger, C, additional, Fullard, K, additional, Galetsas, A, additional, Gallacher, A, additional, Gibson, A, additional, Gill, R D, additional, Geode, A, additional, Gondhalekar, A, additional, Gottardi, N A, additional, Gowers, C, additional, Granetz, R, additional, Green, B, additional, Gregoli, S, additional, Griph, F S, additional, Haange, R, additional, Hancock, C J, additional, Harbour, P, additional, Herog, R F, additional, Kaellne, J, additional, Lauro-Taroni, L, additional, Lazzaro, E, additional, Lobel, R C, additional, Lomas, P, additional, Lorenzo-Gottardi, M, additional, Lowry, C, additional, Magyar, G, additional, Maissonneir, D, additional, Malacarne, M, additional, Marchese, V, additional, Massmann, P, additional, McMullen, P, additional, Mead, M J, additional, Meriguet, P, additional, Merlo, V, additional, Mills, S, additional, Millward, P, additional, Moissonnier, A, additional, Mondini, P L, additional, Morgan, P, additional, Murphy, G, additional, Nave, M F, additional, Nickesson, L, additional, Nielson, P, additional, Noll, P, additional, Nowak, S, additional, Obert, W, additional, Oliver, B, additional, Olsson, M, additional, O'Rourke, J, additional, Pacco, M G, additional, Paillere, J, additional, Pannacione, L, additional, Papastergiou, S, additional, Pasini, D, additional, Pescatore, M, additional, Planncoulaine, J, additional, Poffe, J P, additional, Prentice, R, additional, Raimondi, T, additional, Raymond, C, additional, Rebut, P H, additional, Removille, J, additional, Riediker, W, additional, Roberts, R, additional, Rolfe, A, additional, Ross, R T, additional, Sadler, G, additional, Saffert, J, additional, Salmon, N, additional, Sand, A, additional, Santagiustina, A, additional, Saunders, R, additional, Schmid, M, additional, Schueller, F C, additional, Selin, K, additional, Shaw, R, additional, Sigournay, D, additional, Simonini, R, additional, Smeulders, P, additional, Sonnerup, L, additional, Sonnenberg, K, additional, Stamp, M, additional, Steed, C A, additional, Stork, D, additional, Stott, P E, additional, Stringer, T E, additional, Summers, D, additional, Tanga, A, additional, Taroni, A, additional, Terrington, A, additional, Tesini, A, additional, Thomas, P R, additional, Thompson, E, additional, Tibone, F, additional, Tivery, R, additional, Usselmann, E, additional, Beken, H Van der, additional, Hellerman, M Von, additional, Montfoort, J E Van, additional, Wade, T, additional, Walker, C, additional, Wallander, B A, additional, Walravens, M, additional, Walter, K, additional, Watkins, M L, additional, Watson, M, additional, Webberley, D, additional, Wesson, J, additional, Wilks, J, additional, Winkel, T, additional, Woodward, C, additional, Wykes, M, additional, Young, D, additional, Zennelili, L, additional, Zwart, J, additional, Beaumont, B, additional, Gambier, D, additional, Moreau, D, additional, Ehrenberg, J, additional, Jaeckel, H, additional, Kissel, S, additional, Kuephnapfel, U, additional, Mueller, R, additional, Staebler, A, additional, Weller, A, additional, Hamnen, J H, additional, Evrared, M, additional, Gadeberg, M, additional, Thomsen, K, additional, Dupperrex, P, additional, Tonetti, G, additional, Lopez-Cardozo, N, additional, Tubbing, B, additional, Seggern, J Von, additional, Tagle, J, additional, Bombarda, F, additional, Bracco, G, additional, Giannella, R, additional, Carolan, R, additional, Cox, M, additional, Forrest, M, additional, Goodall, D, additional, Hawkes, N, additional, Haynes, P, additional, Hugill, J, additional, Lawson, K D, additional, McCracken, G, additional, Partridge, J, additional, Peacock, N, additional, Snipes, J, additional, Todd, T, additional, Schamel, H, additional, Summers, H, additional, and Tsuji, S, additional
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- 1986
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24. Start up and initial operation of JET
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Dietz, K.J., primary, Bartlett, D., additional, Bäumel, G., additional, Behringer, K., additional, Bertolini, E., additional, Best, C., additional, Bickerton, R.J., additional, Bombi, F., additional, Boschi, A., additional, Browne, M.L., additional, Brusati, M., additional, Bulliard, A., additional, Campbell, D., additional, Carolan, P.J., additional, Clausing, R., additional, Christiansen, J., additional, Chuilon, P., additional, Gordey, J.G., additional, Costley, A., additional, De Kock, L., additional, Düchs, D.F., additional, Duesing, G., additional, Emergy, R.K.F., additional, Engelhardt, W.W., additional, Eriksson, T., additional, Forrest, M.J., additional, Froger, C., additional, Fullard, K., additional, Gibson, A., additional, Gill, R., additional, Gondhalekar, A., additional, Gowers, C., additional, Green, B.J., additional, Hemmerich, J., additional, Huart, M., additional, Hugenholtz, C.A., additional, Huguet, M., additional, Jarvis, O.N., additional, Jensen, B.E., additional, Krause, H., additional, Kupschus, P., additional, Last, J., additional, Lazzaro, E., additional, McCracken, G.M., additional, Magyar, G., additional, Mast, F.K., additional, Mead, M., additional, Mondino, P.L., additional, Morgan, P., additional, Morris, A.W., additional, Nickesson, L., additional, Niedermeyer, H., additional, Noll, P., additional, Paillere, J., additional, Peacock, N.J., additional, Pick, M., additional, Raymond, C., additional, Rebut, P.H., additional, Ross, R., additional, Sadler, G., additional, Schmidt, V., additional, Schüller, F.C., additional, Sonnenberg, K., additional, Stamp, M.F., additional, Steed, C.A., additional, Stella, A., additional, Stott, P.E., additional, Summers, D., additional, Tanga, A., additional, Thomas, P.R., additional, Usselmann, E., additional, Van Belle, P., additional, Van Der Beken, H., additional, Van Montfoort, J.E., additional, Waelbroeck, F., additional, Wesson, J.A., additional, Winkel, T., additional, Winter, J., additional, and Zwart, J., additional
- Published
- 1984
- Full Text
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25. The use of carbon fibre composites in divertor target plate tiles and structures
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Altmann, H., primary, Deksnis, E., additional, Fanthome, J., additional, Froger, C., additional, Lowry, C., additional, Peacock, A., additional, and Pick, M.A., additional
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26. The use of carbon fibre composites in divertor target plate tiles and structures.
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Altmann, H., Deksnis, E., Fanthome, J., Froger, C., Lowry, C., Peacock, A., and Pick, M.A.
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- 1995
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27. Design of the JET pumped divertor.
- Author
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Huguet, M., Altmann, H., Barabaschi, P., Bertolini, E., Dietz, K., Deksnis, E., Falter, H., Froger, C., Garribba, M., Kaye, A., Last, J.R., Lobel, R., Martin, E., Massmann, P., Noll, P., Obert, W., Papastergiou, S., Peacock, A., Pick, M., and Rebut, P.H.
- Published
- 1991
- Full Text
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28. Penser la protection sociale sous Vichy : le poids du passé, le choc des événements
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Le Crom, Jean-Pierre, Maison des Sciences de l'Homme Ange-Guépin (MSH Ange-Guépin), Centre National de la Recherche Scientifique (CNRS)-Université d'Angers (UA)-Le Mans Université (UM)-Université de Nantes (UN), Droit et changement social (DCS), Centre National de la Recherche Scientifique (CNRS)-Université de Nantes - UFR Droit et Sciences Politiques (UFR DSP), Université de Nantes (UN)-Université de Nantes (UN), Benalbaz C., Froger C., Platon S., Berthier B., Le Mans Université (UM)-Université d'Angers (UA)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes - UFR Droit et Sciences Politiques (UFR DSP), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS), and Université de Nantes (UN)-Le Mans Université (UM)-Université d'Angers (UA)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
[SHS.DROIT]Humanities and Social Sciences/Law - Published
- 2017
29. Four approaches to setting soil health targets and thresholds in agricultural soils.
- Author
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Matson A, Fantappiè M, Campbell GA, Miranda-Vélez JF, Faber JH, Gomes LC, Hessel R, Lana M, Mocali S, Smith P, Robinson DA, Bispo A, van Egmond F, Keesstra S, Saby NPA, Smreczak B, Froger C, Suleymanov A, and Chenu C
- Abstract
Soil health is a key concept in worldwide efforts to reverse soil degradation, but to be used as a tool to improve soils, it must be definable at a policy level and quantifiable in some way. Soil indicators can be used to define soil health and quantify the degree to which soils fulfil expected functions. Indicators are assessed using target and/or threshold values, which define achievable levels of the indicators or functions. However, defining robust targets and thresholds is not a trivial task, as they should account for soil, climate, land-use, management, and history, among others. This paper introduces and discusses (through theory and stakeholder feedback) four approaches to setting targets and thresholds: fixed, reference, distribution and relative change. Three approaches (not including relative change) are then illustrated using a case study, located in Denmark, Italy, and France, which highlights key strengths and weaknesses of each approach. Finally, a framework is presented that facilitates both choosing the most appropriate target/threshold method for a given context, and using targets/thresholds to trigger follow-up actions to promote soil health., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Ltd. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
30. Identifying Giant Cell Arteritis patients with higher risk of relapse and vascular events: a cluster analysis.
- Author
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Guédon AF, Froger C, Agard C, Bénichou A, Le Jeune S, Mekinian A, Morard M, Skaff Y, de Boysson H, and Espitia O
- Abstract
Objective: Giant cell arteritis (GCA) is one of the most common large vessel (LVV) vasculitis and is associated with a high risk of relapse and cardiovascular complications. Improving risk stratification remains a significant issue in this patient population. We aimed to perform a cluster analysis among GCA to identify clusters and evaluate their prognostic value., Methods: In a multicenter cohort study, we performed hierarchical cluster analysis on the factor analysis of mixed data coordinates results with 283 GCA patients' characteristics to generate clusters and assess incidence of relapse, cardiovascular events and death., Results: Three clusters were identified: "Vascular relapsing profile" (23.0%), "Typical GCA profile" (47.7%), and "Ophthalmologic elderly profile" (29.3%). The "Vascular relapsing profile" cluster included younger patients with more frequent relapses and cardiovascular events, particularly thoracic aortic aneurysms. The "Typical GCA profile" was the largest, with classic cranial manifestations and frequently associated polymyalgia rheumatica. The "Ophthalmologic elderly profile" had the oldest patients with more visual loss and the highest mortality rate., Conclusions: Our findings underline the varied prognostic landscape within GCA, emphasizing the poor cardiovascular prognosis of younger patients with LV involvement and the higher mortality among elderly patients. This reinforces the need for further research regarding the screening of aortic abnormalities and whether those patients might benefit from intensive treatment with biotherapy and cardiovascular risk factors management., (© The Author(s) 2024. Published by Oxford University Press on behalf of the Association of Physicians. All rights reserved. For permissions, please email: journals.permissions@oup.com.)
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- 2024
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31. First national reference of microplastic contamination of French soils.
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Palazot M, Soccalingame L, Froger C, Jolivet C, Bispo A, Kedzierski M, and Bruzaud S
- Abstract
The recent emergence of studies on plastic contamination of terrestrial environments has revealed the presence of microplastics (MP) in a variety of soil types, from the most densely populated areas to the most remote ones. However, the concentrations and chemical natures of MP in soils vary between studies, and only a few ones have focused on this issue in France. The MICROSOF project aimed to establish the first national references for French soil contamination by microplastics. 33 soil samples randomly chosen on the French soil quality-monitoring network were analyzed. The study collected data on the abundance of microplastics in the [315-5000] μm range, their chemical nature and size, as well as mass abundance estimates and other relevant information. Results demonstrated that 76 % of the soil samples contained microplastics, in concentrations ranging from <6.7 to 80 MP.kg
-1 (dry soil). Most samples from croplands, grasslands and vineyards and orchards were contaminated, whereas only one sample from forest contained MP, suggesting an increased risk of microplastic contamination in soils exposed to agricultural practices. The MP abundances are not statistically different from similar studies, indicating an intermediate level of contamination in French soils. Despite intervention reports and surveys, the sources remain unclear at this stage. For the first time, an overview of the state of soil contamination in France, as well as the potential risks is provided., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)- Published
- 2024
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32. The epoxiconazole and tebuconazole fungicides impair granulosa cells functions partly through the aryl hydrocarbon receptor (AHR) signalling with contrasted effects in obese, normo-weight and polycystic ovarian syndrome (PCOS) patients.
- Author
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Serra L, Estienne A, Bongrani A, Ramé C, Caria G, Froger C, Jolivet C, Henriot A, Amalric L, Corbin E, Guérif F, Froment P, and Dupont J
- Abstract
Polycystic ovarian syndrome (PCOS), frequently associated to obesity, is the main reproductive disorder in women in age to procreate. Some evidence suggests that pesticides can result in alterations of the female reproductive system, including polycystic ovary syndrome (PCOS). Here, we detected two fungicides, Tebuconazole (Tb) and Epoxiconazole (Epox) in the soils and waters of French area. Our hypothesis is that these two triazoles could be associated to the etiology of PCOS. We used the human KGN cell line and primary human granulosa cells (hGCs) from different group of patients: normal weight non PCOS (NW), normal weight PCOS (PCOS NW), obese (obese) and obese PCOS (PCOS obese). We exposed in vitro these cells to Tb and Epox from 0 up to 10 mM for 24 and 48 h and analysed cell viability and steroidogenesis. In hGCs NW, cell viability was reduced from 12.5 µM for Tb and 75 µM for Epox. In hGCs NW, Epox decreased progesterone (Pg) and estradiol (E2) secretions and inhibited STAR , HSD3B and CYP19A1 mRNA expressions from 25 µM and increased AHR mRNA expression from 75 µM. Tb exposure also reduced steroid secretion and STAR and CYP19A1 mRNA expressions and increased AHR mRNA expression but at cytotoxic concentrations. Silencing of AHR in KGN cells reduced inhibitory effects of Tb and Epox on steroid secretion. Tb and Epox exposure decreased more steroid secretion in hGCs from obese, PCOS NW and PCOS obese groups than in NW group. Moreover, we found a higher gene expression of AHR within these three groups. Taken together, both Epox and Tb reduced steroidogenesis in hGCs through partly AHR and Tb was more cytotoxic than Epox. These triazoles alter more strongly PCOS and/or obese hGCs suggesting that human with reproductive disorders are more sensitive to triazoles exposure., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2024 The Authors.)
- Published
- 2023
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33. In vitro exposure to triazoles used as fungicides impairs human granulosa cells steroidogenesis.
- Author
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Serra L, Estienne A, Caria G, Ramé C, Jolivet C, Froger C, Henriot A, Amalric L, Guérif F, Froment P, and Dupont J
- Subjects
- Female, Humans, Granulosa Cells, Estradiol metabolism, Progesterone metabolism, Triazoles toxicity, Fungicides, Industrial toxicity
- Abstract
Triazoles are the main components of fungicides used in conventional agriculture. Some data suggests that they may be endocrine disruptors. Here, we found five triazoles, prothioconazole, metconazole, difenoconazole, tetraconazole, and cyproconazole, in soil or water from the Centre-Val de Loire region of France. We then studied their effects from 0.001 µM to 1000 µM for 48 h on the steroidogenesis and cytotoxicity of ovarian cells from patients in this region and the human granulosa line KGN. In addition, the expression of the aryl hydrocarbon receptor (AHR) nuclear receptor in KGN cells was studied. Overall, all triazoles reduced the secretion of progesterone, estradiol, or both at doses that were non-cytotoxic but higher than those found in the environment. This was mainly associated, depending on the triazole, with a decrease in the expression of CYP51, STAR, CYP11A1, CYP19A1, or HSD3B proteins, or a combination thereof, in hGCs and KGN cells and an increase in AHR in KGN cells., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 The Authors. Published by Elsevier B.V. All rights reserved.)
- Published
- 2023
- Full Text
- View/download PDF
34. Pesticide Residues in French Soils: Occurrence, Risks, and Persistence.
- Author
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Froger C, Jolivet C, Budzinski H, Pierdet M, Caria G, Saby NPA, Arrouays D, and Bispo A
- Subjects
- Soil chemistry, Agriculture, Ecosystem, Environmental Monitoring, Pesticide Residues analysis, Insecticides, Fungicides, Industrial analysis, Acaricides, Soil Pollutants, Pesticides analysis, Herbicides
- Abstract
Contamination of the environment by pesticide residues is a growing concern given their widespread presence in the environment and their effects on ecosystems. Only a few studies have addressed the occurrence of pesticides in soils, and their results highlighted the need for further research on the persistence and risks induced by those substances. We monitored 111 pesticide residues (48 fungicides, 36 herbicides, 25 insecticides and/or acaricides, and two safeners) in 47 soils sampled across France under various land uses (arable lands, vineyards, orchards, forests, grasslands, and brownfields). Pesticides were found in 98% of the sites (46 of the 47 sampled), including untreated areas such as organic fields, forests, grasslands, and brownfields, with up to 33 different substances detected in one sample, mostly fungicides and herbicides. The concentrations of herbicides were the highest in soils with glyphosate, and its transformation product, AMPA, contributed 70% of the cumulative herbicides. Risk assessment underlined a moderate to high risk for earthworms in arable soils mostly attributed to insecticides and/or acaricides. Finally, the comparison with pesticide application by farmers underlines the presence of some residues long after their supposed 90% degradation and at concentrations higher than predicted environmental concentrations, leading to questions their real persistence in soils.
- Published
- 2023
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- View/download PDF
35. Innovative combination of tracing methods to differentiate between legacy and contemporary PAH sources in the atmosphere-soil-river continuum in an urban catchment (Orge River, France).
- Author
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Froger C, Ayrault S, Gasperi J, Caupos E, Monvoisin G, Evrard O, and Quantin C
- Abstract
Polycyclic aromatic hydrocarbons (PAH) have been released by human activities during more than a century, contaminating the entire atmosphere - soil - river continuum. Due to their ubiquity in the environment and their potential severe biological impacts, PAH became priority pollutants and were targeted by environmental public agencies. To better manage PAH pollution, it is necessary to identify unambiguously the sources and pathways of those compounds at the catchment scale, and to evaluate the persistence of historical PAH pollution in the environment especially in those urban contexts concentrating multiple PAH sources. Accordingly, the current research monitored the contamination in atmospheric fallout, soils and rivers of a 950-km
2 catchment (Orge River) characterized by an increasing urban gradient in downstream direction, and located in the Seine River basin characterized by a high level of PAH legacy contamination. A combination of various approaches was used, including the widely used PAH diagnostic ratios, together with innovative methods such as PAH correlations and sediment fingerprinting using fallout radionuclides to clearly identify both the origin of PAH and their main PAH pathways to the river. The results demonstrated the persistence of legacy PAH contamination in the catchment, responsible for the signature of the suspended particulate matter currently transiting in the Orge River. They underlined the conservation of PAH through the soil - river continuum. Finally, urban runoff was demonstrated to provide the main PAH source to the river in the densely urbanized area by both PAH correlations and sediment fingerprinting. These results were used to model PAH concentrations in those particles supplied from urban areas to the river., (Copyright © 2019 Elsevier B.V. All rights reserved.)- Published
- 2019
- Full Text
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36. Impact of urban pressure on the spatial and temporal dynamics of PAH fluxes in an urban tributary of the Seine River (France).
- Author
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Froger C, Quantin C, Gasperi J, Caupos E, Monvoisin G, Evrard O, and Ayrault S
- Subjects
- Air Pollutants analysis, Rivers chemistry, Environmental Monitoring methods, Polycyclic Aromatic Hydrocarbons analysis, Urbanization, Water Pollutants, Chemical analysis
- Abstract
Polycyclic aromatic hydrocarbons (PAHs) produced by numerous anthropogenic activities are ubiquitous in the environment and have become a priority concern due to their potential severe biological impacts. A better understanding of PAH transfer at the catchment scale is therefore necessary to improve the management of PAH contaminants and protect rivers. Furthermore, the impact of changes in hydrological regimes and land uses on PAH fluxes should be specifically investigated. Accordingly, the current research monitors the contamination in atmospheric fallout, soils and rivers in a 950-km
2 catchment (Orge River) characterized by an increasing urban gradient in downstream direction. During an entire hydrological year, river water contamination was quantified through regular sampling of both particulate and dissolved material at four river-monitoring stations, reflecting the increasing urbanization gradient. The significant input of PAHs from urban areas in downstream river sections corresponded to a specific PAH flux that reached 23 g km-2 y-1 despite the low sediment yield. Moreover, the comparison with runoff-specific fluxes reported in the literature underlined the major impact of urban runoff on the Orge River water and sediment quality. Nevertheless, the annual PAH load exported by the river (21 kg y-1 ) remained lower than the PAH inputs from atmospheric fallout (173 kg y-1 ), demonstrating the continuous accumulation of PAH from atmospheric fallout in the catchment soils. Consequently, the notably large PAH stock (close to 1000 tons) resulting from historical contamination of this early-industrialized region continues to increase due to ongoing atmospheric inputs., (Copyright © 2018 Elsevier Ltd. All rights reserved.)- Published
- 2019
- Full Text
- View/download PDF
37. Optimizing memory strategy use in young and older adults: The role of metamemory and internal strategy use.
- Author
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Guerrero Sastoque L, Bouazzaoui B, Burger L, Froger C, Isingrini M, and Taconnat L
- Subjects
- Adult, Aged, Analysis of Variance, Awareness physiology, Female, Humans, Learning, Male, Middle Aged, Young Adult, Aging physiology, Internal-External Control, Memory physiology, Mental Recall, Metacognition physiology, Reading
- Abstract
We explored whether experiencing differential efficacy of reading and generation for memory in an initial learning trial led younger and older adults to improve recall of read items in a subsequent learning trial, leading to a reduction of the generation effect. In the first trial, generation improved the memory performance of both young and older adults. However, in Trial 2, the generation effect remained significant for older adults only, confirming that they did not change the way they processed read items, unlike the young adults. The older adults were also less spontaneously aware that generation led to better memory performance in the first trial, and, in contrast to the young adults, awareness did not result in a reduction of the generation effect. Moreover, the age-related differences in generation effect reduction were mediated by an independent measure of self-reported internal strategy use. However, when an appropriate environmental support was provided between both trials, older adults improved read items recall at the second trial as well as younger ones, leading to an elimination of the generation advantage for both groups. Environmental support reduced the implication of internal strategy use in the generation effect reduction, suggesting that age-related differences in the implementation of effective encoding processes in Trial 2 would be the consequence of a metamemory deficit, and reduced capacity to self-initiate internal strategies., (Copyright © 2018 Elsevier B.V. All rights reserved.)
- Published
- 2019
- Full Text
- View/download PDF
38. Tracing the sources of suspended sediment and particle-bound trace metal elements in an urban catchment coupling elemental and isotopic geochemistry, and fallout radionuclides.
- Author
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Froger C, Ayrault S, Evrard O, Monvoisin G, Bordier L, Lefèvre I, and Quantin C
- Subjects
- Agriculture, Environmental Monitoring methods, Floods, France, Geologic Sediments chemistry, Isotopes analysis, Lead analysis, Radioactive Fallout, Radioisotopes analysis, Rivers chemistry, Urbanization, Geologic Sediments analysis, Metals analysis, Water Pollutants, Chemical analysis, Water Pollutants, Radioactive analysis
- Abstract
The excessive supply of contaminants from urban areas to rivers during the last centuries has led to deleterious impacts on aquatic ecosystems. The sources, the behavior, and the dynamics of these contaminants must be better understood in order to reduce this excessive anthropogenic pollution. Accordingly, the current research investigated the particle-bound trace element (TE) contamination of the 900-km
2 Orge River (Seine basin, France) and the potential sources of these particles (agricultural or forest soils, channel banks, road deposited sediments), through the analysis of multiple fallout radionuclides, elemental geochemistry, and lead isotopic composition on suspended particulate matter (SPM) collected during a hydrological year at four stations following an increasing urbanization gradient (300 to 5000 inhab.km-2 ). Fallout radionuclide measurements showed an increasing contribution of recently eroded particles from urban areas to the SPM in downstream direction. However, this contribution varied depending on hydrological conditions. A greater contribution of particles originating from urban areas was observed during low stage periods. On the contrary, the contribution of agricultural soils and channel banks that are less enriched in contaminants and fallout radionuclides was higher during seasonal floods, which explained the dilution of radionuclide contents in sediment transiting the river during those events. Trace element contamination of SPM in Cu, Zn, Pb, and Sb increased from moderate to significant levels with urban pressure in downstream direction (with corresponding enrichment factors raising from 2 to 6). In addition, Pb isotopic ratios indicated that the main source of Pb corresponded to the "urban" signature found in road deposited sediments. The low variations in lead isotope ratios found in the SPM for contrasting hydrological conditions demonstrated the occurrence of a single source of Pb contamination. These results demonstrate the need to better manage urban runoff during both flood and low precipitation events to prevent the supply of diffuse particle-bound contamination to rivers draining urban areas.- Published
- 2018
- Full Text
- View/download PDF
39. Event-related brain potential correlates of brain reorganization of episodic memory throughout the adult lifespan.
- Author
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Alibran E, Bouazzaoui B, Angel L, Froger C, Gomot M, and Isingrini M
- Subjects
- Adult, Aged, Aging psychology, Electroencephalography, Humans, Mental Recall physiology, Middle Aged, Models, Neurological, Neuropsychological Tests, Vocabulary, Young Adult, Aging physiology, Brain physiology, Evoked Potentials physiology, Memory, Episodic, Neuronal Plasticity physiology
- Abstract
The main aim of this study was to characterize the age-related evolution of the event-related brain potentials correlates of successful to tackle the neural reorganization patterns associated with this episodic retrieval. We thus examined the evolution of the event-related brain potential old/new effect across the adult lifespan, in five groups, aged 21-70 years (21-30, 31-40, 41-50, 51-60, and 61-70 years), equalized on their memory performance through a word-stem cued-recall task. This procedure makes it possible to examine the evolution of age-related changes in brain organization during adulthood and to specify the age onset of these changes. Results confirm the hypothesis that aging is associated with major changes in brain functioning. These changes appear to be consistent with both the HAROLD and PASA hypotheses, which postulate an age-related reduction in hemispheric asymmetry and a shift from posterior to anterior areas, respectively. What is notable is that these patterns of brain reorganization are not specific to older stages of life as they begin to develop very early in adult life, around the 30s, and the shift toward frontal regions strengthens in the 60s.
- Published
- 2018
- Full Text
- View/download PDF
40. Everyday Functioning Benefits from an Assisted Living Platform amongst Frail Older Adults and Their Caregivers.
- Author
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Dupuy L, Froger C, Consel C, and Sauzéon H
- Abstract
Ambient assisted living technologies (AAL) are regarded as a promising solution to support aging in place. Yet, their efficacy has to be demonstrated in terms of benefits for independent living and for work conditions of caregivers. Hence, the purpose of this study was to assess the benefits of a multi-task AAL platform for both Frail older Individuals (FIs) and professional caregivers with respect to everyday functioning and caregiver burden. In this context, a 6-month field study involved 32 FIs living at home (half of them were equipped by the platform and the remaining half were not, as a control condition) and their caregivers. Everyday functioning measures were reported by frail participants and caregivers. Self-reported burden measures of caregiver were also collected. The main results showed that the caregiver's estimates of everyday functioning of equipped participants were unchanged across time, while they decreased for the control participants. Also, a reduction of self-reported objective burden was obtained after 6 months of AAL intervention for the equipped group, compared to the control group. Overall, these results highlighted the potential of AAL as a relevant environmental support for preventing both functional losses in FIs and objective burden professional caregiver.
- Published
- 2017
- Full Text
- View/download PDF
41. Study time allocation deficit of older adults: the role of environmental support at encoding?
- Author
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Froger C, Bouazzaoui B, Isingrini M, and Taconnat L
- Subjects
- Adult, Aged, Aged, 80 and over, Cues, Environment, Female, Humans, Male, Middle Aged, Time Factors, Aging psychology, Association Learning physiology, Cognition physiology, Test Taking Skills psychology
- Abstract
The present research evaluated both metacognitive and environmental support accounts of age-related changes in the way study time is adapted to task difficulty. The original aim was to examine whether providing environmental support at encoding would allow older adults to adjust their study time to the task difficulty by using effective encoding strategies. The difficulty of the learning task was manipulated by varying the strength of association of cue-target pairs (i.e., weak vs. strong associates). This allowed us to measure metacognitive control in aging and, specifically, the ability to adjust study time according to task difficulty. The level of environmental support at encoding was manipulated to examine whether it could be used by older adults to adjust their study time according to the task difficulty. In contrast to the classical literature on the effect of aging on metacognitive control, we found that older adults were able to adjust their study time to task difficulty when environmental support was provided. Furthermore, providing encoding strategies with information about their effectiveness helped older adults adjust their study time to task difficulty optimally by improving their strategy use and compensating for their associative memory deficit.
- Published
- 2012
- Full Text
- View/download PDF
42. Metamemory judgments and study time allocation in young and older adults: dissociative effects of a generation task.
- Author
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Froger C, Sacher M, Gaudouen MS, Isingrini M, and Taconnat L
- Subjects
- Adult, Age Factors, Aged, Aged, 80 and over, Female, Humans, Learning physiology, Male, Middle Aged, Aging psychology, Cognition physiology, Judgment physiology, Memory physiology
- Abstract
This study explored age-related differences in the use of metacognitive judgment to allocate extra study time according to the perceived difficulty of a learning task. The task difficulty was varied by manipulating the encoding condition which entailed either generating or reading paired associates. Perceived difficulty was measured by the global prediction rating, whereby participants predicted that they would recall fewer words in the learning task they considered hardest. Participants were first asked to predict their own future recall performance and then learned paired associates in their own time, and finally performed a cued-recall test for each encoding condition. Our results replicated earlier findings that generation improves the memory performance of both young and older adults. However, both groups thought that generation would be more difficult than reading and predicted that they would recall fewer words under that condition. The young adults allocated different amounts of study time to the two tasks, whereas the older adults allocated the same time. This was interpreted as an age-related impairment in self-initiated coordination of metacognitive judgment and the control processes required for effective allocation of study time., (PsycINFO Database Record (c) 2011 APA, all rights reserved.)
- Published
- 2011
- Full Text
- View/download PDF
43. No altered blood pressure and serum markers of oxidative stress after a long time dietary fish oil in the genetically 9 month-old type-2 diabetes Zucker rat.
- Author
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Tricot S, Mimouni V, Rompion S, Froger C, Lacroix P, Roux S, and Ulmann L
- Subjects
- Animals, Biomarkers blood, Diabetes Mellitus, Type 2 genetics, Dietary Fats, Unsaturated pharmacology, Fish Oils pharmacology, Glutathione metabolism, Male, Obesity metabolism, Rats, Rats, Zucker, Blood Pressure drug effects, Diabetes Mellitus, Type 2 blood, Diabetes Mellitus, Type 2 physiopathology, Dietary Fats, Unsaturated administration & dosage, Fish Oils administration & dosage, Oxidative Stress
- Abstract
In this study, we investigated the effect of a high n-3 fatty acid diet (eicosapentaenoic and docosahexaenoic acids) in Zucker obese and lean rats on blood pressure in association with physiological parameters, serum biochemistry and oxidative stress analysis. After 150 days of treatment, dietary fish oil supplementation in Zucker obese rats (9 months of age) reduces bodyweight gain and serum triglyceridemia and nitrite levels, increases serum glucose and angiotensin converting enzyme activity, but does not alter blood pressure, cholesterol levels and serum markers of oxidative stress (malondialdehyde, glutathione), compared to the Zucker rats fed control diet. According to these results, we can consider that after 150 days of treatment, fish oil is not enough to regulate parameters involved in the metabolic syndrome, such as cholesterolemia and blood pressure, in a 9 month-old genetically type-2 diabetes rat., (Copyright © 2010 Elsevier Ltd. All rights reserved.)
- Published
- 2010
- Full Text
- View/download PDF
44. Effects of level of processing at encoding and types of retrieval task in mild cognitive impairment and normal aging.
- Author
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Froger C, Taconnat L, Landré L, Beigneux K, and Isingrini M
- Subjects
- Adult, Aged, Aged, 80 and over, Analysis of Variance, Female, Humans, Male, Neuropsychological Tests, Pattern Recognition, Visual, Psychometrics, Reaction Time physiology, Semantics, Young Adult, Aging physiology, Cognition Disorders physiopathology, Discrimination, Psychological physiology, Mental Recall physiology, Recognition, Psychology physiology
- Abstract
A total of 16 young (M = 27.25 years), 13 healthy elderly (M = 75.38 years), and 10 older adults with probable mild cognitive impairment (MCI; M = 78.6 years) carried out a task under two different encoding conditions (shallow vs. semantic) and two retrieval conditions (free recall vs. recognition). For the shallow condition, participants had to decide whether the first or last letter of each word in a list was "E." For the semantic condition, they had to decide whether each word represented a concrete or abstract entity. The MCI group was only able to benefit from semantic encoding to the same extent as the healthy older adults in the recognition task, whereas the younger and healthy older adults benefited in both retrieval tasks. These results suggest that the MCI group required cognitive support at retrieval to make effective use of semantic processing carried out at encoding. In the discussion, we suggest that adults with MCI engage more in deep processing, using the semantic network, than hitherto thought.
- Published
- 2009
- Full Text
- View/download PDF
45. Generation and associative encoding in young and old adults: the effect of the strength of association between cues and targets on a cued recall task.
- Author
-
Taconnat L, Froger C, Sacher M, and Isingrini M
- Subjects
- Adult, Aged, Aged, 80 and over, Female, Humans, Male, Middle Aged, Reading, Semantics, Aging psychology, Attention, Cues, Mental Recall, Paired-Associate Learning
- Abstract
The generation effect (i.e., better recall of the generated items than the read items) was investigated with a between-list design in young and elderly participants. The generation task difficulty was manipulated by varying the strength of association between cues and targets. Overall, strong associates were better recalled than weak associates. However, the results showed different generation effect patterns according to strength of association and age, with a greater generation effect for weak associates in younger adults only. These findings suggest that generating weak associates leads to more elaborated encoding, but that elderly adults cannot use this elaborated encoding as well as younger adults to recall the target words at test.
- Published
- 2008
- Full Text
- View/download PDF
46. Place preference test in rodents.
- Author
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Roux S, Froger C, Porsolt RD, Valverde O, and Maldonado R
- Subjects
- Animals, Male, Mice psychology, Mice, Inbred C57BL, Motivation, Pharmaceutical Preparations, Rats psychology, Rats, Wistar, Reward, Behavioral Sciences methods, Biomedical Research methods, Conditioning, Psychological, Environment, Neurosciences methods, Rodentia psychology
- Abstract
Conditioned place preference is a behavioral model currently used to measure the rewarding properties induced by the administration of a drug. In this paradigm, the rewarding properties of a compound are associated with the particular characteristics of a given environment. Due to the recent availability of multiple lines of genetically modified mice, this unit includes procedures for testing place preference in both rats and mice.
- Published
- 2003
- Full Text
- View/download PDF
47. [Syncopes during simultaneous use of terfenadine and itraconazole].
- Author
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Romkes JH, Froger CL, Wever EF, and Westerhof PW
- Subjects
- Adult, Cardiotonic Agents therapeutic use, Female, Humans, Isoproterenol therapeutic use, Long QT Syndrome chemically induced, Long QT Syndrome drug therapy, Mycoses drug therapy, Rhinitis, Allergic, Seasonal drug therapy, Anti-Allergic Agents adverse effects, Antifungal Agents adverse effects, Itraconazole adverse effects, Syncope chemically induced, Terfenadine adverse effects
- Abstract
A 36-year-old female was given terfenadine 120 mg/day for hay fever, and itraconazole 100 mg twice daily for mycosis. Nine days after starting these drugs, she had several episodes of syncope. The ECG showed a long QT interval and torsades de pointes. The drugs were withdrawn and the patient temporarily received an infusion of isoprenaline, after which the QT interval returned to normal and no further episodes of torsades de pointes occurred. No other causes than the two drugs were found to explain these episodes.
- Published
- 1997
48. [Biosynthesis of glycoproteins in cells infected with an arbovirus. 3. Effect of virus multiplication and of concanavalin A].
- Author
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Froger C and Louisot P
- Subjects
- Animals, Arboviruses drug effects, Carbon Radioisotopes, Cells, Cultured, Chick Embryo, Electrophoresis, Polyacrylamide Gel, Enzyme Activation drug effects, Fibroblasts, Glycoproteins analysis, Hexosyltransferases metabolism, Kinetics, Microsomes enzymology, Microsomes metabolism, Stimulation, Chemical, Arboviruses growth & development, Concanavalin A pharmacology, Glycoproteins biosynthesis, Virus Replication drug effects
- Published
- 1974
- Full Text
- View/download PDF
49. [Combating dust in blasting].
- Author
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Froger C
- Subjects
- Methods, Coal Mining, Dust prevention & control, Mining
- Published
- 1972
50. Glycoprotein biosynthesis in arbovirus-infected cells. I. Study of glucosamine and N-acetyl-glucosamine transferases.
- Author
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Froger C and Louisot P
- Subjects
- Acetates, Animals, Carbon Isotopes, Chick Embryo, Chromatography, Gel, Cytoplasm enzymology, Endoplasmic Reticulum enzymology, Fibroblasts cytology, Fibroblasts microbiology, Glucosamine, Glycoproteins isolation & purification, Microsomes enzymology, Ribosomes enzymology, Tritium, Arboviruses, Fibroblasts enzymology, Glucosyltransferases, Glycoproteins biosynthesis
- Published
- 1972
- Full Text
- View/download PDF
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