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5. Collaborateurs aux éditions précédentes

Author

Adamsbaum, C., primary, Bordonne, C., additional, Bléry, M.†, additional, Bonnin, A.†, additional, Broussouloux, C., additional, Carrière, F., additional, Clément, A., additional, Convard, J.-P., additional, Desmonts, F., additional, Falip, C., additional, Fontanelle, L., additional, Franchi-Abela, S., additional, Girardot, C., additional, Giuria, A., additional, Hoeffel, C., additional, Laugier, P., additional, Millischer-Bellaiche, A.-E., additional, Miquel, A., additional, Panisset, S., additional, Rangheard, A.-S., additional, Renaudin, J.-M., additional, Rocher, L., additional, Seguin, G., additional, Soffer, M., additional, and Vignaux, O., additional

Published
2022
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6. Recommandations françaises du Comité de cancérologie de l’AFU – Actualisation 2024–2026 : cancer des surrénales – conduite à tenir face à un incidentalome surrénalien et prise en charge carcinologique

Author

Savoie, P.-H., Murez, T., Rocher, L., Neuville, P., Escoffier, A., Fléchon, A., Branger, N., Camparo, P., and Rouprêt, M.

Abstract

L’objectif de cette publication est de rappeler la conduite à tenir initiale face à un incidentalome surrénalien et le cas échéant d’établir la prise en charge carcinologique d’une tumeur maligne de la surrénale.

Published
2024
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14. Adversarial competition and collusion in algorithmic markets

Author

Rocher, L, Tournier, AJ, and de Montjoye, YA

Subjects
Human-Computer Interaction, Artificial Intelligence, Computer Networks and Communications, Computer Vision and Pattern Recognition, Software
Abstract

Algorithms are now playing a central role in digital marketplaces, setting prices and automatically responding in real time to competitors’ behaviour. The deployment of automated pricing algorithms is scrutinized by economists and regulatory agencies, concerned about its impact on prices and competition. Existing research has so far been limited to cases where all firms use the same algorithm, suggesting that anti-competitive behaviour might spontaneously arise in that setting. Here we introduce and study a general anti-competitive mechanism, adversarial collusion, where one firm manipulates other sellers that use their own pricing algorithm. We propose a network-based framework to model the strategies of pricing algorithms on iterated two-firm and three-firm markets. In this framework, an attacker learns to endogenize competitors’ algorithms and then derive a strategy to artificially increase its profit at the expense of competitors. Facing a drastic loss of profits, competitors will eventually intervene and revise or turn off their pricing algorithm. To disincentivize this intervention, we show that the attacker can instead unilaterally increase both its profits and the profits of competitors. This leads to a collusive outcome with symmetric and supra-competitive profits, sustainable in the long run. Together, our findings highlight the need for policymakers and regulatory agencies to consider adversarial manipulations of algorithmic pricing, which might currently fall outside of the scope of current competition laws.

Published
2023
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19. Selection of an early biomarker for vascular normalization using dynamic contrast-enhanced ultrasonography to predict outcomes of metastatic patients treated with bevacizumab

Author

Lassau, N., Coiffier, B., Kind, M., Vilgrain, V., Lacroix, J., Cuinet, M., Taieb, S., Aziza, R., Sarran, A., Labbe-Devilliers, C., Gallix, B., Lucidarme, O., Ptak, Y., Rocher, L., Caquot, L.M., Chagnon, S., Marion, D., Luciani, A., Feutray, S., Uzan-Augui, J., Benatsou, B., Bonastre, J., and Koscielny, S.

Published
2016
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22. Études Epistress : impact du stress ressenti sur la glycémie, dans une population de sujets atteints de DT1

Author

Franc, S., Rocher, L., Plat, F., Lablanche, S., Bouillet, B., Navarranne, A., Allix, I., Vambergue, A., Jeandidier, N., Schaeplynck, P., Sonnet, E., Catargi, B., Chauvet-Gelinier, J.C., and Charpentier, G.

Abstract

Les études Epistress avaient comme objectif de caractériser les sujets vivant avec un diabète de type 1 (SvDT1) selon l’impact du stress sur leur glycémie.

Published
2024
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27. Metastable structures, interplay of sequential deformations, and interactions between tungsten disulfide nanotubes and poly(L-lactide) studied by in situ X-ray scattering

Author

Kornfield, J. A., Rocher, L., Lennon, A. B., Ylitalo, A. S., Di Luccio, T., Menary, G. H., Miscioscia, R., De Filippo, G., Pandolfi, G., and Villani, F.

Abstract

Polymer crystallization, particularly near the glass transition, exhibits strong nonlinearities and prolonged metastability that enable fabrication of devices with complex hierarchal structure from nm to mm. A fascinating example arises in the production of bioresorbable scaffolds (BRS) from poly(L-lactide) (PLLA), in which a sequence of processes (extrusion, stretch-blow molding and crimping) create diverse semicrystalline morphologies, side-by-side within a span of a hundred microns (Figure 1). To discover how these structures form, we need to examine transient structure under conditions that mimic manufacturing processes. An apparatus that enables scattering measurements during the stretch-blow molding step, called “tube expansion” imposes a nearly constant-width elongation as it converts an extruded “preform” into an “expanded tube”. To increase the range of accessible properties of PLLA-based BRS, we use this apparatus to examine inorganic nanotubes as potential reinforcing agents that also enhance radiopacity, relevant to clinical applications. Understanding how their microstructure develops during processing is relevant to increasing strength to enable thinner devices and improving radiopacity to enable imaging during implantation. Consistent with the premise of this MS, in-situ X-ray scattering reveals unanticipated phenomena in the transient microstructure of PLLA/WS2NTs nanocomposites during “tube expansion” (Figure 2).

Published
2021

28. Chronic Peritoneal Dialysis Using Curled Catheters

Author

Swartz, R. D., Rocher, L. L., Starmann, B., Reynolds, J., Lees, P., Avram, Morrell M., editor, Giordano, Carmelo, editor, DeSanto, Natale G., editor, Mittman, Neal, editor, Bazzato, Giorgio, editor, Fein, Paul A., editor, Gan, Amado, editor, Goldwasser, Philip, editor, and Slater, Paul A., editor

Published
1990
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29. Prévalence de l’obésité et des anomalies du métabolisme glucidique chez les patients adultes avec une hypophosphatémie génétique liée à l’X (XLH)

Author

Lecoq, A.L., primary, Chaumet-Riffaud, P., additional, Garnier, A., additional, Trabado, S., additional, Schilbach, K., additional, Carette, C., additional, Durand, E., additional, Rothenbuhler, A., additional, Briot, K., additional, Silve, C., additional, Piketty, M., additional, Rocher, L., additional, Chanson, P., additional, Bidlingmaier, M., additional, Linglart, A., additional, and Kamenicky, P., additional

Published
2021
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32. Contenu scrotal

Author

Rocher, L., primary, Ifergan, J., additional, Bellin, M. F., additional, Glas, L., additional, and Cluzel, G., additional

Published
2014
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34. Collaborateurs

Author

Capmas, P., primary, Bellin, M.-F., additional, Bléry, M., additional, Gayet, M., additional, Glas, L., additional, Glatard, A.-S., additional, Levaillant, J.-M., additional, Long, A., additional, Mohallem Fonseca, M., additional, Rangheard, A.-S., additional, Rocher, L., additional, and Verin, A.-L., additional

Published
2014
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