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447 results on '"Rigal, J."'

2. End-of-Life Doulas

Author

Krawczyk, Marian, primary, Clare, E., additional, Collins, A., additional, Farr, S., additional, Johnston, E., additional, Mallmes, J., additional, Mallon, A., additional, Oberle, K., additional, and Rigal, J., additional

Published
2023
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5. Study of a high spatial resolution 10B-based thermal neutron detector for application in neutron reflectometry: the Multi-Blade prototype

Author

Piscitelli, F., Buffet, J. C., Clergeau, J. F., Cuccaro, S., Guerard, B., Khaplanov, A., La Manna, Q., Rigal, J. M., and Van Esch, P.

Subjects
Physics - Instrumentation and Detectors
Abstract

Although for large area detectors it is crucial to find an alternative to detect thermal neutrons because of the 3He shortage, this is not the case for small area detectors. Neutron scattering science is still growing its instruments' power and the neutron flux a detector must tolerate is increasing. For small area detectors the main effort is to expand the detectors' performances. At Institut Laue-Langevin (ILL) we developed the Multi-Blade detector which wants to increase the spatial resolution of 3He-based detectors for high flux applications. We developed a high spatial resolution prototype suitable for neutron reflectometry instruments. It exploits solid 10B-films employed in a proportional gas chamber. Two prototypes have been constructed at ILL and the results obtained on our monochromatic test beam line are presented here.

Published
2013
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19. Transfusion-Related Renal Dysfunction After Cardiac Surgery The Role of Myeloid-Related Protein_14 in Neutrophil-Mediated Tubular Damage

Author

Vourc'h, M, Roquilly, A, Foucher, A, Retiere, C, Feuillet, F, Devi, S, McWilliam, HEG, Braudeau, C, Bourreille, G, Hachani, A, O'Kane, D, Mueller, SN, Ischia, J, Roussel, J-C, Rigal, J-C, Josien, R, Rozec, B, Villadangos, JA, Asehnoune, K, Vourc'h, M, Roquilly, A, Foucher, A, Retiere, C, Feuillet, F, Devi, S, McWilliam, HEG, Braudeau, C, Bourreille, G, Hachani, A, O'Kane, D, Mueller, SN, Ischia, J, Roussel, J-C, Rigal, J-C, Josien, R, Rozec, B, Villadangos, JA, and Asehnoune, K

Abstract

Transfusion is a specific cause of acute kidney injury (AKI) after cardiac surgery. Whether there is an association between the composition of blood products and the onset of AKI is unknown. The present study suggests that the transfusion of packed red blood cells containing a high amount of myeloid-related protein 14 (MRP_14) could increase the incidence of AKI after cardiac surgery. In a mouse model, MRP_14 increased the influx of neutrophils in the kidney after ischemia-reperfusion and their ability to damage tubular cells. Higher concentrations of MRP_14 were found in packed red blood cells from female donors or prepared by whole blood filtration.

Published
2022

22. PHEBUS: A double ultraviolet spectrometer to observe Mercury's exosphere

Author

Chassefière, E., Maria, J.-L., Goutail, J.-P., Quémerais, E., Leblanc, F., Okano, S., Yoshikawa, I., Korablev, O., Gnedykh, V., Naletto, G., Nicolosi, P., Pelizzo, M.-G., Correia, J.-J., Gallet, S., Hourtoule, C., Mine, P.-O., Montaron, C., Rouanet, N., Rigal, J.-B., Muramaki, G., Yoshioka, K., Kozlov, O., Kottsov, V., Moisseev, P., Semena, N., Bertaux, J.-L., Capria, M.-Th., Clarke, J., Cremonese, G., Delcourt, D., Doressoundiram, A., Erard, S., Gladstone, R., Grande, M., Hunten, D., Ip, W., Izmodenov, V., Jambon, A., Johnson, R., Kallio, E., Killen, R., Lallement, R., Luhmann, J., Mendillo, M., Milillo, A., Palme, H., Potter, A., Sasaki, S., Slater, D., Sprague, A., Stern, A., and Yan, N.

Published
2010
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36. Dynamic behavior of a thin-walled cylindrical workpiece during the turning process, Part 1: cutting process simulation

Author

Mehdi, K., Rigal, J.-F., and Play, D.

Subjects
Vibration research -- Analysis, Machining -- Research, Engineering and manufacturing industries, Science and technology
Abstract

From a practical point of view, in machining applications, chatter vibration constitutes a major problem during the cutting process. It is becoming increasingly difficult to suppress chatter during cutting at high speeds. Many investigators have regarded chatter vibrations as a 'natural' phenomenon during the cutting process and a part of the process itself. In classical machining operations with thick-walled workpieces chatter vibrations occur when the cutting depth exceeds stability limits dependent on the machine tool. On the other hand, in the case of thin-walled cylindrical workpieces, chatter vibration problems are not so simple to formulate. The main purpose of this study is to qualify the dynamic behavior of a thin-walled workpiece during the turning process. It contains two parts: the cutting process simulation and the definition of experimental stability criteria. In the first part, a numerical model, which simulates the turning process of thin-walled cylindrical workpieces, is proposed. This model also permits obtaining workpiece responses to excitation generated by cutting forces. Finally, the stability of the process is discussed. [DOI: 10.1115/1.1431260]

Published
2002

37. Dynamic behavior of a thin-walled cylindrical workpiece during the turning process, Part 2: experimental approach and validation

Author

Mehdi, K., Rigal, J.-F., and Play, D.

Subjects
Vibration research -- Analysis, Machining -- Research, Engineering and manufacturing industries, Science and technology
Abstract

Chatter vibrations in the cutting process have a central place in many machining applications. A numerical and theoretical approach of self-excited vibrations during the turning process of thin-walled hollow workpieces has been presented in the accompanying paper. Furthermore, a finite element model has been proposed to simulate the dynamics of the system. The response to a Dirac excitation, presented as Nyquist curves, is proposed in order to characterize the dynamics of the turning process and the stability criterion. In this the second part of two related papers, the main objective is to validate the simulated dynamic behavior by using the experimental approach. The results of machining tests performed on thin-walled tubes with steel and aluminum alloys, using different operating conditions (dimensions, geometry and setting conditions) are presented and discussed. [DOI: 10.1115/1.1432667]

Published
2002

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