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1. A Novel 8-Predictors Signature to Predict Complicated Disease Course in Pediatric-onset Crohn’s Disease: A Population-based Study

Author

Sarter, Hélène, Savoye, Guillaume, Marot, Guillemette, Ley, Delphine, Turck, Dominique, Hugot, Jean-Pierre, Vasseur, Francis, Duhamel, Alain, Wils, Pauline, Princen, Fred, Colombel, Jean-Frédéric, Gower-Rousseau, Corinne, Fumery, Mathurin, Al Hameedi, R, Al Khatib, M, Al Turk, S, Agoute, E, Andre, J, Antonietti, M, Aouakli, A, Armand, A, Armengol-Debeir, L, Aroichane, I, Assi, F, Aubet, J, Auxenfants, E, Avram, A, Ayafi-Ramelot, F, Azzouzi, K, Bankovski, D, Barbry, B, Bardoux, N, Baron, P, Baudet, A, Bayart, P, Bazin, B, Bebahani, A, Becqwort, J, Bellati, S, Benet, V, Benali, H, Benard, C, Benguigui, C, Ben Soussan, E, Bental, A, Berkelmans, I, Bernet, J, Bernou, K, Bernou-Dron, C, Bertot, P, Bertiaux-Vandaële, N, Bertrand, V, Billoud, E, Biron, N, Bismuth, B, Bleuet, M, Blondel, F, Blondin, V, Bobula, M, Bohon, P, Bondjemah, V, Boniface, E, Bonkovski, D, Bonnière, P, Bonvarlet, E, Bonvarlet, P, Boruchowicz, A, Bostvironnois, R, Boualit, M, Bouazza, A, Bouche, B, Boudaillez, C, Bourgeaux, C, Bourgeois, M, Bourguet, A, Bourienne, A, Boutaleb, H, Bouthors, A, Branche, J, Bray, G, Brazier, F, Breban, P, Bridenne, M, Brihier, H, Bril, L, Brung-Lefebvre, V, Bulois, P, Burgiere, P, Butel, J, Canva, J, Canva-Delcambre, V, Capron, J, Cardot, F, Carette, S, Carpentier, P, Cartier, E, Cassar, J, Cassagnou, M, Castex, J, Catala, P, Cattan, S, Catteau, S, Caujolle, B, Cayron, G, Chandelier, C, Chantre, M, Charles, J, Charneau, T, Chavance-Thelu, M, Cheny, A, Chirita, D, Choteau, A, Claerbout, J, Clergue, P, Coevoet, H, Cohen, G, Collet, R, Colin, M, Colombel, J, Coopman, S, Cordiez, L, Corvisart, J, Cortot, A, Couttenier, F, Crinquette, J, Crombe, V, Dadamessi, I, Daoudi, H, Dapvril, V, Davion, T, Dautreme, S, Debas, J, Decoster, S, Degrave, N, Dehont, F, Delatre, C, Delcenserie, R, Delesalle, D, Delette, O, Delgrange, T, Delhoustal, L, Delmotte, J, Demmane, S, Deregnaucourt, G, Descombes, P, Desechalliers, J, Desmet, P, Desreumaux, P, Desseaux, G, Desurmont, P, Devienne, A, Devouge, E, Devred, M, Devroux, A, Dewailly, A, Dharancy, S, Di Fiore, A, Djedir, D, Djedir, R, Doleh, W, Dreher-Duwat, M, Dubois, R, Duburque, C, Ducatillon, P, Duclay, J, Ducrocq, B, Ducrot, F, Ducrotte, P, Dufilho, A, Duhamel, C, Dujardin, D, Dumant-Forest, C, Dupas, J, Dupont, F, Duranton, Y, Duriez, A, Duveau, N, El Achkar, K, El Farisi, M, Elie, C, Elie-Legrand, M, Elkhaki, A, Eoche, M, Essmaeel, E, Evrard, D, Evrard, J, Fatome, A, Filoche, B, Finet, L, Flahaut, M, Flamme, C, Foissey, D, Fournier, P, Foutrein-Comes, M, Foutrein, P, Fremond, D, Frere, T, Gallais, P, Gamblin, C, Ganga, S, Gerard, R, Geslin, G, Gheyssens, Y, Ghossini, N, Ghrib, S, Gilbert, T, Gillet, B, Godart, D, Godard, P, Godchaux, J, Godchaux, R, Goegebeur, G, Goria, O, Gottrand, F, Gower, P, Grandmaison, B, Groux, M, Guedon, C, Guerbeau, L, Gueroult-Dero, M, Guillard, J, Guillem, L, Guillemot, F, Guimberd, D, Haddouche, B, Hakim, S, Hanon, D, Hautefeuille, V, Heckestweiller, P, Hecquet, G, Hedde, J, Hellal, H, Henneresse, P, Heyman, B, Heraud, M, Herve, S, Hochain, P, Houssin-Bailly, L, Houcke, P, Huguenin, B, Iobagiu, S, Istanboli, S, Ivanovic, A, Iwanicki-Caron, I, Janicki, E, Jarry, M, Jeu, J, Joly, J, Jonas, C, Jouvenet, A, Katherin, F, Kerleveo, A, Khachfe, A, Kiriakos, A, Kiriakos, J, Klein, O, Kohut, M, Kornhauser, R, Koutsomanis, D, Laberenne, J, Lacotte, E, Laffineur, G, Lagarde, M, Lalanne, A, Lalieu, A, Lannoy, P, Lapchin, J, Laprand, M, Laude, D, Leblanc, R, Lecieux, P, Lecleire, S, Leclerc, N, Le Couteulx, C, Ledent, J, Lefebvre, J, Lefiliatre, P, Le Goffic, C, Legrand, C, Le Grix, A, Lelong, P, Leluyer, B, Lemaitre, C, Lenaerts, C, Lepeut, G, Lepileur, L, Leplat, A, Lepoutre-Dujardin, E, Leroi, H, Leroy, M, Le Roy, P, Lesage, B, Lesage, J, Lesage, X, Lescanne-Darchis, I, Lescut, J, Lescut, D, Leurent, B, Levy, P, Lhermie, M, Libier, L, Lion, A, Lisambert, B, Loge, I, Loire, F, Loreau, J, Louf, S, Louvet, A, Lubret, L, Luciani, M, Lucidarme, D, Lugand, J, Macaigne, O, Maetz, D, Maillard, D, Mancheron, H, Manolache, O, Marks-Brunel, A, Marre, C, Marti, R, Martin, F, Martin, G, Marzloff, E, Mathurin, P, Mauillon, J, Maunoury, V, Maupas, J, Medam Djomo, M, Mechior, C, Melki, Z, Mesnard, B, Metayer, P, Methari, L, Meurisse, B, Meurisse, F, Michaud, L, Mirmaran, X, Modaine, P, Monthe, A, Morel, L, Mortier, P, Moulin, E, Mouterde, O, Mozziconaci, N, Mudry, J, Nachury, M, Ngo, M, N’guyen Khac, Eric, Notteghem, B, Ollevier, V, Ostyn, A, Ouraghi, A, Oussadou, B, Ouvry, D, Paillot, B, Painchart, C, Panien-Claudot, N, Paoletti, C, Papazian, A, Parent, B, Pariente, B, Paris, J, Patrier, P, Paupard, T, Pauwels, B, Pauwels, M, Penninck, E, Petit, R, Piat, M, Piotte, S, Plane, C, Plouvier, B, Pollet, E, Pommelet, P, Pop, D, Pordes, C, Pouchain, G, Prades, P, Prevost, A, Prevost, J, Quartier, G, Quesnel, B, Queuniet, A, Quinton, J, Rabache, A, Rabelle, P, Raclot, G, Ratajczyk, S, Rault, D, Razemon, V, Reix, N, Renaut-Vantroys, T, Revillion, M, Riachi, G, Richez, C, Robinson, P, Rodriguez, J, Roger, J, Roux, J, Rudelli, A, Saber, A, Savoye, G, Schlossberg, P, Sefrioui, D, Segrestin, M, Seguy, D, Seminur, C, Serin, M, Seryer, A, Sevenet, F, Shekh, N, Silvie, J, Simon, V, Spyckerelle, C, Talbodec, N, Tavernier, N, Tchandeu, H, Techy, A, Thelu, J, Thevenin, A, Thiebault, H, Thomas, J, Thorel, J, Thuillier, C, Tielman, G, Tode, M, Toisin, J, Tonnel, J, Touchais, J, Toumelin, P, Touze, Y, Tranvouez, J, Triplet, C, Triki, N, Turck, D, Uhlen, S, Vaillant, E, Valmage, C, Vanco, D, Vandaele-Bertiaux, N, Vandamme, H, Vanderbecq, E, Vander Eecken, E, Vandermolen, P, Vandevenne, P, Vandeville, L, Vandewalle, A, Vandewalle, C, Vaneslander, P, Vanhoove, J, Vanrenterghem, A, Vanveuren, C, Varlet, P, Vasies, I, Verbiese, G, Verlynde, J, Vernier-Massouille, G, Vermelle, P, Verne, C, Vezilier-Cocq, P, Vigneron, B, Vincendet, M, Viot, J, Voiment, Y, Wacrenier, A, Waeghemaecker, L, Wallez, J, Wantiez, M, Wartel, F, Weber, J, Willocquet, J, Wizla, N, Wolschies, E, Zaharia, O, Zaoui, S, Zalar, A, Zaouri, B, Zellweger, A, Ziade, C, Beaugerie, L, Allez, M, Ruemmele, F, Lamer, A, Roy, M, CHU Lille, Institute for Translational Research in Inflammation - U 1286 (INFINITE (Ex-Liric)), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Nutrition, Inflammation et axe Microbiote-Intestin-Cerveau (ADEN), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institute for Research and Innovation in Biomedicine (IRIB), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institute for Research and Innovation in Biomedicine (IRIB), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU), Service d'Hépato-Gastroentérologie [CHU Rouen], Hôpital Charles Nicolle [Rouen], CHU Rouen, Normandie Université (NU)-Normandie Université (NU)-CHU Rouen, Normandie Université (NU)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Evaluation des technologies de santé et des pratiques médicales - ULR 2694 (METRICS), Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Service des Maladies de l'Appareil Digestif et de la Nutrition [CHRU Lille], Hôpital Claude Huriez [Lille], CHU Lille-CHU Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Centre Hospitalier Universitaire de Reims (CHU Reims), Périnatalité et Risques Toxiques - UMR INERIS_I 1 (PERITOX), Institut National de l'Environnement Industriel et des Risques (INERIS)-Université de Picardie Jules Verne (UPJV)-CHU Amiens-Picardie, CHU Amiens-Picardie, Registre EPIMAD, Normandie Université (NU)-Normandie Université (NU)-CHU Amiens-Picardie-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Department of Colloid Chemistry [Potsdam], Max Planck Institute of Colloids and Interfaces, Max-Planck-Gesellschaft-Max-Planck-Gesellschaft, Groupe de Recherche sur l'alcool et les pharmacodépendances - UMR INSERM_S 1247 (GRAP), and Université de Picardie Jules Verne (UPJV)-Institut National de la Santé et de la Recherche Médicale (INSERM)

Subjects
Crohn’s disease, inflammatory bowel disease, complication, genetics, prediction, prognosis, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
Abstract

International audience; Background The identification of patients at high risk of a disabling disease course would be invaluable in guiding initial therapy in Crohn’s disease (CD). Our objective was to evaluate a combination of clinical, serological, and genetic factors to predict complicated disease course in pediatric-onset CD. Methods Data for pediatric-onset CD patients, diagnosed before 17 years of age between 1988 and 2004 and followed more than 5 years, were extracted from the population-based EPIMAD registry. The main outcome was defined by the occurrence of complicated behavior (stricturing or penetrating) and/or intestinal resection within the 5 years following diagnosis. Lasso logistic regression models were used to build a predictive model based on clinical data at diagnosis, serological data (ASCA, pANCA, anti-OmpC, anti-Cbir1, anti-Fla2, anti-Flax), and 369 candidate single nucleotide polymorphisms. Results In total, 156 children with an inflammatory (B1) disease at diagnosis were included. Among them, 35% (n = 54) progressed to a complicated behavior or an intestinal resection within the 5 years following diagnosis. The best predictive model (PREDICT-EPIMAD) included the location at diagnosis, pANCA, and 6 single nucleotide polymorphisms. This model showed good discrimination and good calibration, with an area under the curve of 0.80 after correction for optimism bias (sensitivity, 79%, specificity, 74%, positive predictive value, 61%, negative predictive value, 87%). Decision curve analysis confirmed the clinical utility of the model. Conclusions A combination of clinical, serotypic, and genotypic variables can predict disease progression in this population-based pediatric-onset CD cohort. Independent validation is needed before it can be used in clinical practice.

Published
2023
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2. Impact of Extra-Intestinal Manifestations at Diagnosis on Disease Outcome in Pediatric- and Elderly-Onset Crohn′s Disease: A French Population-Based Study

Author

Duricova, Dana, Sarter, Hélène, Savoye, Guillaume, Leroyer, Ariane, Pariente, Benjamin, Armengol-Debeir, Laura, Bouguen, Guillaume, Ley, Delphine, Turck, Dominique, Templier, Carole, Buche, Sebastien, Peyrin-Biroulet, Laurent, Gower-Rousseau, Corinne, Fumery, Mathurin, Andre, J M, Antonietti, M, Aouakli, A, Armand, A, Aroichane, I, Assi, F, Aubet, J P, Auxenfants, E, Ayafi-Ramelot, F, Bankovski, D, Barbry, B, Bardoux, N, Baron, P, Baudet, A, Bazin, B, Bebahani, A, Becqwort, J P, Benet, V, Benali, H, Benguigui, C, Ben Soussan, E, Bental, A, Berkelmans, I, Bernet, J, Bernou, K, Bernou-Dron, C, Bertot, P, Bertiaux-Vandaële, N, Bertrand, V, Billoud, E, Biron, N, Bismuth, B, Bleuet, M, Blondel, F, Blondin, V, Bohon, P, Boniface, E, Bonnière, P, Bonvarlet, E, Bonvarlet, P, Boruchowicz, A, Bostvironnois, R, Boualit, M, Bouche, B, Boudaillez, C, Bourgeaux, C, Bourgeois, M, Bourguet, A, Bourienne, A, Branche, J, Bray, G, Brazier, F, Breban, P, Brihier, H, Brung-Lefebvre, V, Bulois, P, Burgiere, P, Butel, J, Canva, J Y, Canva-Delcambre, V, Capron, J P, Cardot, F, Carpentier, P, Cartier, E, Cassar, J F, Cassagnou, M, Castex, J F, Catala, P, Cattan, S, Catteau, S, Caujolle, B, Cayron, G, Chandelier, C, Chantre, M, Charles, J, Charneau, T, Chavance-Thelu, M, Chirita, D, Choteau, A, Claerbout, J F, Clergue, P Y, Coevoet, H, Cohen, G, Collet, R, Colombel, J F, Coopman, S, Corvisart, J, Cortot, A, Couttenier, F, Crinquette, J F, Crombe, V, Dadamessi, I, Dapvril, V, Davion, T, Dautreme, S, Debas, J, Degrave, N, Dehont, F, Delatre, C, Delcenserie, R, Delette, O, Delgrange, T, Delhoustal, L, Delmotte, J S, Demmane, S, Deregnaucourt, G, Descombes, P, Desechalliers, J P, Desmet, P, Desreumaux, P, Desseaux, G, Desurmont, P, Devienne, A, Devouge, E, Devred, M, Devroux, A, Dewailly, A, Dharancy, S, Di Fiore, A, Djeddi, D, Djedir, R, Dreher-Duwat, M L, Dubois, R, Dubuque, C, Ducatillon, P, Duclay, J, Ducrocq, B, Ducrot, F, Ducrotté, P, Dufilho, A, Duhamel, C, Dujardin, D, Dumant-Forest, C, Dupas, J L, Dupont, F, Duranton, Y, Duriez, A, El Achkar, K, El Farisi, M, Elie, C, Elie-Legrand, M C, Elkhaki, A, Eoche, M, Evrard, D, Evrard, J P, Fatome, A, Filoche, B, Finet, L, Flahaut, M, Flamme, C, Foissey, D, Fournier, P, Foutrein- Comes, M C, Foutrein, P, Fremond, D, Frere, T, Fumery, M, Gallet, P, Gamblin, C, Ganga-Zandzou, S, Gerard, R, Geslin, G, Gheyssens, Y, Ghossini, N, Ghrib, S, Gilbert, T, Gillet, B, Godard, D, Godard, P, Godchaux, J M, Godchaux, R, Goegebeur, G, Goria, O, Gottrand, F, Gower, P, Grandmaison, B, Groux, M, Guedon, C, Guillard, J F, Guillem, L, Guillemot, F, Guimber, D, Haddouche, B, Hakim, S, Hanon, D, Hautefeuille, V, Heckestweiller, P, Hecquet, G, Hedde, J P, Hellal, H, Henneresse, P E, Heyman, B, Heraud, M, Herve, S, Hochain, P, Houssin-Bailly, L, Houcke, P, Huguenin, B, Iobagiu, S, Ivanovic, A, Iwanicki-Caron, I, Janicki, E, Jarry, M, Jeu, J, Joly, J P, Jonas, C, Katherin, F, Kerleveo, A, Khachfe, A, Kiriakos, A, Kiriakos, J, Klein, O, Kohut, M, Kornhauser, R, Koutsomanis, D, Laberenne, J E, Laffineur, G, Lagarde, M, Lannoy, P, Lapchin, J, Lapprand, M, Laude, D, Leblanc, R, Lecieux, P, Leclerc, N, Le Couteulx, C, Ledent, J, Lefebvre, J, Lefiliatre, P, Legrand, C, Le Grix, A, Lelong, P, Leluyer, B, Lenaerts, C, Lepileur, L, Leplat, A, Lepoutre-Dujardin, E, Leroi, H, Leroy, M Y, Lesage, J P, Lesage, X, Lesage, J, Lescanne-Darchis, I, Lescut, J, Lescut, D, Leurent, B, Levy, P, Lhermie, M, Lion, A, Lisambert, B, Loire, F, Louf, S, Louvet, A, Luciani, M, Lucidarme, D, Lugand, J, Macaigne, O, Maetz, D, Maillard, D, Mancheron, H, Manolache, O, Marks-Brunel, A B, Marti, R, Martin, F, Martin, G, Marzloff, E, Mathurin, P, Mauillon, J, Maunoury, V, Maupas, J L, Mesnard, B, Metayer, P, Methari, L, Meurisse, B, Meurisse, F, Michaud, L, Mirmaran, X, Modaine, P, Monthe, A, Morel, L, Mortier, P E, Moulin, E, Mouterde, O, Mudry, J, Nachury, M, N’Guyen Khac, E, Notteghem, B, Ollevier, V, Ostyn, A, Ouraghi, A, Ouvry, D, Paillot, B, Panien-Claudot, N, Paoletti, C, Papazian, A, Parent, B, Pariente, B, Paris, J C, Patrier, P, Paupart, L, Pauwels, B, Pauwels, M, Petit, R, Piat, M, Piotte, S, Plane, C, Plouvier, B, Pollet, E, Pommelet, P, Pop, D, Pordes, C, Pouchain, G, Prades, P, Prevost, A, Prevost, J C, Quesnel, B, Queuniet, A M, Quinton, J F, Rabache, A, Rabelle, P, Raclot, G, Ratajczyk, S, Rault, D, Razemon, V, Reix, N, Revillon, M, Richez, C, Robinson, P, Rodriguez, J, Roger, J, Roux, J M, Rudelli, A, Saber, A, Savoye, G, Schlosseberg, P, Segrestin, M, Seguy, D, Serin, M, Seryer, A, Sevenet, F, Shekh, N, Silvie, J, Simon, V, Spyckerelle, C, Talbodec, N, Techy, A, Thelu, J L, Thevenin, A, Thiebault, H, Thomas, J, Thorel, J M, Tielman, G, Tode, M, Toisin, J, Tonnel, J, Touchais, J Y, Touze, Y, Tranvouez, J L, Triplet, C, Turck, D, Uhlen, S, Vaillant, E, Valmage, C, Vanco, D, Vandamme, H, Vanderbecq, E, Vander Eecken, E, Vandermolen, P, Vandevenne, P, Vandeville, L, Vandewalle, A, Vandewalle, C, Vaneslander, P, Vanhoove, J P, Vanrenterghem, A, Varlet, P, Vasies, I, Verbiese, G, Vernier-Massouille, G, Vermelle, P, Verne, C, Vezilier-Cocq, P, Vigneron, B, Vincendet, M, Viot, J, Voiment, Y M, Wacrenier, A, Waeghemaecker, L, Wallez, J Y, Wantiez, M, Wartel, F, Weber, J, Willocquet, J L, Wizla, N, Wolschies, E, Zalar, A, Zaouri, B, Zellweger, A, and Ziade, C

Published
2019
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3. Ulcerative proctitis is a frequent location of paediatric-onset UC and not a minor disease: a population-based study

Author

Hochart, A, Gower-Rousseau, C, Sarter, H, Fumery, M, Ley, D, Spyckerelle, C, Peyrin-Biroulet, L, Laberenne, J-E, Vasseur, F, Savoye, G, Turck, D, Andre, JM, Antonietti, M, Aouakli, A, Armand, A, Aroichane, I, Assi, F, Aubet, JP, Auxenfants, E, Ayafi-Ramelot, F, Azzouzi, K, Bankovski, D, Barbry, B, Bardoux, N, Baron, P, Baudet, A, Bazin, B, Bebahani, A, Becqwort, JP, Benet, V, Benali, H, Benguigui, C, Ben Soussan, E, Bental, A, Berkelmans, I, Bernet, J, Bernou, K, Bernou-Dron, C, Bertot, P, Bertiaux-Vandaële, N, Bertrand, V, Billoud, E, Biron, N, Bismuth, B, Bleuet, M, Blondel, F, Blondin, V, Bohon, P, Boniface, E, Bonnière, P, Bonvarlet, E, Bonvarlet, P, Boruchowicz, A, Bostvironnois, R, Boualit, M, Bouche, B, Boudaillez, C, Bourgeaux, C, Bourgeois, M, Bourguet, A, Bourienne, A, Branche, J, Bray, G, Brazier, F, Breban, P, Bridenne, M, Brihier, H, Brung-Lefebvre, V, Bulois, P, Burgiere, P, Butel, J, Canva, JY, Canva-Delcambre, V, Capron, JP, Cardot, F, Carpentier, P, Cartier, E, Cassar, JF, Cassagnou, M, Castex, JF, Catala, P, Cattan, S, Catteau, S, Caujolle, B, Cayron, G, Chandelier, C, Chantre, M, Charles, J, Charneau, T, Chavance-Thelu, M, Chirita, D, Choteau, A, Claerbout, JF, Clergue, PY, Coevoet, H, Cohen, G, Collet, R, Colombel, JF, Coopman, S, Corvisart, J, Cortot, A, Couttenier, F, Crinquette, JF, Crombe, V, Dadamessi, I, Dapvril, V, Davion, T, Dautreme, S, Debas, J, Degrave, N, Dehont, F, Delatre, C, Delcenserie, R, Delette, O, Delgrange, T, Delhoustal, L, Delmotte, JS, Demmane, S, Deregnaucourt, G, Descombes, P, Desechalliers, JP, Desmet, P, Desreumaux, P, Desseaux, G, Desurmont, P, Devienne, A, Devouge, E, Devred, M, Devroux, A, Dewailly, A, Dharancy, S, Di Fiore, A, Djeddi, D, Djedir, R, Dreher-Duwat, ML, Dubois, R, Dubuque, C, Ducatillon, P, Duclay, J, Ducrocq, B, Ducrot, F, Ducrotte, P, Dufilho, A, Duhamel, C, Dujardin, D, Dumant-Forest, C, Dupas, JL, Dupont, F, Duranton, Y, Duriez, A, El Achkar, K, El Farisi, M, Elie, C, Elie-Legrand, MC, Elkhaki, A, Eoche, M, Evrard, D, Evrard, JP, Fatome, A, Filoche, B, Finet, L, Flahaut, M, Flamme, C, Foissey, D, Fournier, P, Foutrein-Comes, MC, Foutrein, P, Fremond, D, Frere, T, Gallet, P, Gamblin, C, Ganga, S, Gerard, R, Geslin, G, Gheyssens, Y, Ghossini, N, Ghrib, S, Gilbert, T, Gillet, B, Godard, D, Godard, P, Godchaux, JM, Godchaux, R, Goegebeur, G, Goria, O, Gottrand, F, Gower, P, Grandmaison, B, Groux, M, Guedon, C, Guillard, JF, Guillem, L, Guillemot, F, Guimberd, D, Haddouche, B, Hakim, S, Hanon, D, Hautefeuille, V, Heckestweiller, P, Hecquet, G, Hedde, JP, Hellal, H, Henneresse, PE, Heyman, B, Heraud, M, Herve, S, Hochain, P, Houssin-Bailly, L, Houcke, P, Huguenin, B, Iobagiu, S, Ivanovic, A, Iwanicki-Caron, I, Janicki, E, Jarry, M, Jeu, J, Joly, JP, Jonas, C, Katherin, F, Kerleveo, A, Khachfe, A, Kiriakos, A, Kiriakos, J, Klein, O, Kohut, M, Kornhauser, R, Koutsomanis, D, Laffineur, G, Lagarde, M, Lalanne, A, Lannoy, P, Lapchin, J, Laprand, M, Laude, D, Leblanc, R, Lecieux, P, Leclerc, N, Le Couteulx, C, Ledent, J, Lefebvre, J, Lefiliatre, P, Legrand, C, Le Grix, A, Lelong, P, Leluyer, B, Lenaerts, C, Lepileur, L, Leplat, A, Lepoutre-Dujardin, E, Leroi, H, Leroy, MY, Lesage, JP, Lesage, X, Lesage, J, Lescanne-Darchis, I, Lescut, J, Lescut, D, Leurent, B, Levy, P, Lhermie, M, Lion, A, Lisambert, B, Loire, F, Louf, S, Louvet, A, Luciani, M, Lucidarme, D, Lugand, J, Macaigne, O, Maetz, D, Maillard, D, Mancheron, H, Manolache, O, Marks-Brunel, AB, Marti, R, Martin, F, Martin, G, Marzloff, E, Mathurin, P, Mauillon, J, Maunoury, V, Maupas, JL, Mesnard, B, Metayer, P, Methari, L, Meurisse, B, Meurisse, F, Michaud, L, Mirmaran, X, Modaine, P, Monthe, A, Morel, L, Mortier, PE, Moulin, E, Mouterde, O, Mudry, J, Nachury, M, NʼGuyen Khac, E, Notteghem, B, Ollevier, V, Ostyn, A, Ouraghi, A, Ouvry, D, Paillot, B, Panien-Claudot, N, Paoletti, C, Papazian, A, Parent, B, Pariente, B, Paris, JC, Patrier, P, Paupart, L, Pauwels, B, Pauwels, M, Petit, R, Piat, M, Piotte, S, Plane, C, Plouvier, B, Pollet, E, Pommelet, P, Pop, D, Pordes, C, Pouchain, G, Prades, P, Prevost, A, Prevost, JC, Quesnel, B, Queuniet, AM, Quinton, JF, Rabache, A, Rabelle, P, Raclot, G, Ratajczyk, S, Rault, D, Razemon, V, Reix, N, Revillon, M, Richez, C, Robinson, P, Rodriguez, J, Roger, J, Roux, JM, Rudelli, A, Saber, A, Schlosseberg, P, Segrestin, M, Seguy, D, Serin, M, Seryer, A, Sevenet, F, Shekh, N, Silvie, J, Simon, V, Talbodec, N, Techy, A, Thelu, JL, Thevenin, A, Thiebault, H, Thomas, J, Thorel, JM, Tielman, G, Tode, M, Toisin, J, Tonnel, J, Touchais, JY, Touze, Y, Tranvouez, JL, Triplet, C, Uhlen, S, Vaillant, E, Valmage, C, Vanco, D, Vandamme, H, Vanderbecq, E, Vander Eecken, E, Vandermolen, P, Vandevenne, P, Vandeville, L, Vandewalle, A, Vandewalle, C, Vaneslander, P, Vanhoove, JP, Vanrenterghem, A, Varlet, P, Vasies, I, Verbiese, G, Vernier-Massouille, G, Vermelle, P, Verne, C, Vezilier-Cocq, P, Vigneron, B, Vincendet, M, Viot, J, Voiment, YM, Wacrenier, A, Waeghemaecker, L, Wallez, JY, Wantiez, M, Wartel, F, Weber, J, Willocquet, JL, Wizla, N, Wolschies, E, Zalar, A, Zaouri, B, Zellweger, A, and Ziade, C

Published
2017
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4. A Simplicial Model for KB4_n: Epistemic Logic with Agents That May Die

Author

Goubault, ��ric, Ledent, J��r��my, Rajsbaum, Sergio, Berenbrink, Petra, and Monmege, Benjamin

Subjects
QA75, Computer Science::Multiagent Systems, Simplicial complexes, Computer Science::Logic in Computer Science, Theory of computation ��� Modal and temporal logics, Epistemic logic, Distributed computing
Abstract

The standard semantics of multi-agent epistemic logic S5_n is based on Kripke models whose accessibility relations are reflexive, symmetric and transitive. This one dimensional structure contains implicit higher-dimensional information beyond pairwise interactions, that we formalized as pure simplicial models in a previous work in Information and Computation 2021 [��ric Goubault et al., 2021]. Here we extend the theory to encompass simplicial models that are not necessarily pure. The corresponding class of Kripke models are those where the accessibility relation is symmetric and transitive, but might not be reflexive. Such models correspond to the epistemic logic KB4_n. Impure simplicial models arise in situations where two possible worlds may not have the same set of agents. We illustrate it with distributed computing examples of synchronous systems where processes may crash., LIPIcs, Vol. 219, 39th International Symposium on Theoretical Aspects of Computer Science (STACS 2022), pages 33:1-33:20

Published
2022
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5. Session 17 Ecophysiology

Author

Aktan, N., Palavan-Ünsal, N., Andonov, A. V., Georgieva, K. M., Yordanov, I. T., Atanasiu, L., Petcu, E., Atkin, O. K., Barabás, N. K., Erdei, L., Baumann, J., Bader, K. P., Bayçu, G., Önal, M., Bock, C., Jacob, A., Mayer, A., Kirst, G. O., Borovsky, G., Voronova, L., Voinikov, V., Borowski, E., Kozlowska, L., Botos-Bálo, B., Váradi, Gy., Happ, I., Busuioc, V. M., Toma, S. I., Cabeza, C. E., Ledent, J. F., Chamont, S., Christov, C., Boshcova, M., Furnadzieva, S., Zafirova, T., Čiamporová, M., Banásová, V., Ouzounidou, G., Clement, Han, Van Hasselt, Philip R., De Gara, L., De Tullio, M. C., Paciolla, C., Stefani, A., Arrigoni, O., de Ramon, M., Reigosa, M. J., Doussi, M. A., Thanos, C. A., Fenik, S. I., Trofimyak, T. B., Blume, Ya. B., Fernandez-Pascual, M., De Lorenzo, C., De Felipe, M. R., Minchin, F. R., Gordon, A. J., Filonick, L. A., Frechilla, S., Royuela, M., Arrese-Igor, C., Aparicio-Tejo, P. M., Gabbrielli, R., Gremigni, P., Pandolfini, T., Gloser, J., Gloser, V., Goncharova, N. V., Sheverdov, V. V., Zhebrakova, I. V., Grakhov, V. P., Kozeko, V. G., Greger, M., Heyman, E., Grishko, V. N., Guglielminetti, L., Perata, P., Alpi, A., Gutterman, Yitzchak, Honour, S. J., Ihle, C., Laasch, H., Ivanova, T. I., Yudina, O. S., Kacperska, A., Kadis, C. C., Georghiou, K., Khilko, T. D., Klimov, S. V., Trunova, T. I., Kosakivska, L. V., Maidebura, E. V., Kostyuk, O. P., Mikheev, A. N., Kutlakhmedov, Yu. A., Kozlova, J. I., Reutsky, V. G., Kravetz, A. P., Pavlenco, Y. A., Kubacka, M., Kacperska, A., Kühn, F., Kuznetsov, Vladimir V., Landberg, T., Greger, M., Campos, P. S., Matos, M. C., Laureano, J. A., Ramalho, J. R., Guedes, M. E., Lidon, F. C., Laureano, J. A., Campos, P. S., Ramalho, J. R., Lidon, F. C., Guedes, M. E., Matos, M. C., Leina, G. D., Lopez-Carbonell, M., Prinsen, E., Pastor, A., Van Onckelen, H., Lösch, R., Zohlen, A., Gonzales, A., Jimenez, M. S., Morales, D., Aschan, G., Lütz, C., Kaiser, F., Masarovičová, E., Lux, A., Kobelová, G., Mattioni, C., Gabbrielli, R., Negru, P. V., Medvedeva, T. N., Tudorake, G. F., Newbery, R. M., Olah, R., Masarovičová, E., Ouzounidou, G., Čiamporová, M., Moustakas, M., Karataglis, S., Pedrol, N., Ramos, P., Reigosa, M. J., Peisker, M., Tichá, I., Václavík, J., Ostareck, D., Pfeffer, M., Peisker, M., Pons, T. L., Popović, M., Kevrešan, S., Kandrač, J., Kočiš, J., Štajner, D., Petrivić, N., Kastori, R., Popovicheva, L. A., Shevchenko, Y. B., Porankiewicz, J., Gwóźdź, E. A., Prokhnevsky, A. I., Ruchko, M. V., Sorochinsky, B. V., Sergeeva, A. Y., Kostyuk, O. P., Mikheev, A. N., Przymusiński, R., Rucińska, R., Gwóźdź, E. A., Pugnaire, F. I., Haase, P., Incoll, L. D., Clark, S. C., Pukacki, P. M., Radotić, K., Todorović, S., Zakrzewska, J., Jeremić, M., Ramos, P., Pedrol, N., Reigosa, M. J., Ruchko, M. V., Sorochinsky, B. V., Sakač, Z., Panković, D., Ćupina, T., Plesničar, M., Save, R., Biel, C., Pons, J., Massons, J., Scheuerlein, R., Treml, S., Thar, B., Tirlapur, U. K., Häder, D. -P., Schneider, J., Legocka, J., Winiarska, G., Schreiber, L., Shabala, S. N., Sheremetiev, S. N., Shtemenko, N. I., Sosak-Swiderska, B., Tyrawska, D., Mazurek, U., Stevanović, B., Šinžar, J., Glišić, O., Stroinski, A., Terbea, Maria, Micut, Gh., Titei, V., Thanos, C. A., Thibaud, M. C., Betsche, T., Tosserams, M., Visser, A. J., Groen, M. W., Kalis, G., Kwant, R., Magendans, E., Rozema, J., Tyrawska, D., Bajan, C., Popowska-Nowak, E., Grochala, K., Utrillas, M. J., Alegre, L., Van Den Boogaard, H. A. G. M., Alewijnse, D., Veneklaas, E. J., Lambers, H., Van Der Kooij, T. A. W., De Kok, L. J., Van Der Werf, Adrie, Bouma, Tjeerd, Scheurwater, Ingeborg, Lambers, Hans, Van Hasselt, P. R., Chow, W. S., Anderson, J. M., Vidal, D., Grau, D., Sanjose, M., Fleck, I., Villar, R., Merino, J., Vincze, G. Y., Vallner, J., Balazsy, S., Balogh, A., Kiss, F., Zaric, L. J., Stefanovic, L., Kerecki, B., Radosavljevic, M., Zivalyuk, O. B., and Filonick, I. A.

Published
1994
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17. Dramatic Increase in Incidence of Ulcerative Colitis and Crohn's Disease (1988–2011): A Population-Based Study of French Adolescents

Author

Ghione, Silvia, primary, Sarter, Hélène, additional, Fumery, Mathurin, additional, Armengol-Debeir, Laura, additional, Savoye, Guillaume, additional, Ley, Delphine, additional, Spyckerelle, Claire, additional, Pariente, Benjamin, additional, Peyrin-Biroulet, Laurent, additional, Turck, Dominique, additional, Gower-Rousseau, Corinne, additional, Andre, J M, additional, Antonietti, M, additional, Aouakli, A, additional, Armand, A, additional, Aroichane, I, additional, Assi, F, additional, Aubet, J P, additional, Auxenfants, E, additional, Ayafi-Ramelot, F, additional, Bankovski, D, additional, Barbry, B, additional, Bardoux, N, additional, Baron, P, additional, Baudet, A, additional, Bazin, B, additional, Bebahani, A, additional, Becqwort, J P, additional, Benet, V, additional, Benali, H, additional, Benguigui, C, additional, Soussan, Ben E, additional, Bental, A, additional, Berkelmans, I, additional, Bernet, J, additional, Bernou, K, additional, Bernou-Dron, C, additional, Bertot, P, additional, Bertiaux-Vandaële, N, additional, Bertrand, V, additional, Billoud, E, additional, Biron, N, additional, Bismuth, B, additional, Bleuet, M, additional, Blondel, F, additional, Blondin, V, additional, Bohon, P, additional, Boniface, E, additional, Bonnière, P, additional, Bonvarlet, E, additional, Bonvarlet, P, additional, Boruchowicz, A, additional, Bostvironnois, R, additional, Boualit, M, additional, Bouche, B, additional, Boudaillez, C, additional, Bourgeaux, C, additional, Bourgeois, M, additional, Bourguet, A, additional, Bourienne, A, additional, Branche, J, additional, Bray, G, additional, Brazier, F, additional, Breban, P, additional, Brihier, H, additional, Brung-Lefebvre, V, additional, Bulois, P, additional, Burgiere, P, additional, Butel, J, additional, Canva, J Y, additional, Canva-Delcambre, V, additional, Capron, J P, additional, Cardot, F, additional, Carpentier, P, additional, Cartier, E, additional, Cassar, J F, additional, Cassagnou, M, additional, Castex, J F, additional, Catala, P, additional, Cattan, S, additional, Catteau, S, additional, Caujolle, B, additional, Cayron, G, additional, Chandelier, C, additional, Chantre, M, additional, Charles, J, additional, Charneau, T, additional, Chavance-Thelu, M, additional, Chirita, D, additional, Choteau, A, additional, Claerbout, J F, additional, Clergue, P Y, additional, Coevoet, H, additional, Cohen, G, additional, Collet, R, additional, Colombel, J F, additional, Coopman, S, additional, Corvisart, J, additional, Cortot, A, additional, Couttenier, F, additional, Crinquette, J F, additional, Crombe, V, additional, Dadamessi, I, additional, Dapvril, V, additional, Davion, T, additional, Dautreme, S, additional, Debas, J, additional, Degrave, N, additional, Dehont, F, additional, Delatre, C, additional, Delcenserie, R, additional, Delette, O, additional, Delgrange, T, additional, Delhoustal, L, additional, Delmotte, J S, additional, Demmane, S, additional, Deregnaucourt, G, additional, Descombes, P, additional, Desechalliers, J P, additional, Desmet, P, additional, Desreumaux, P, additional, Desseaux, G, additional, Desurmont, P, additional, Devienne, A, additional, Devouge, E, additional, Devred, M, additional, Devroux, A, additional, Dewailly, A, additional, Dharancy, S, additional, Di Fiore, A, additional, Djeddi, D, additional, Djedir, R, additional, Dreher-Duwat, M L, additional, Dubois, R, additional, Dubuque, C, additional, Ducatillon, P, additional, Duclay, J, additional, Ducrocq, B, additional, Ducrot, F, additional, Ducrotte, P, additional, Dufilho, A, additional, Duhamel, C, additional, Dujardin, D, additional, Dumant-Forest, C, additional, Dupas, J L, additional, Dupont, F, additional, Duranton, Y, additional, Duriez, A, additional, El Achkar, K, additional, El Farisi, M, additional, Elie, C, additional, Elie-Legrand, M C, additional, Elkhaki, A, additional, Eoche, M, additional, Evrard, D, additional, Evrard, J P, additional, Fatome, A, additional, Filoche, B, additional, Finet, L, additional, Flahaut, M, additional, Flamme, C, additional, Foissey, D, additional, Fournier, P, additional, Foutrein-Comes, M C, additional, Foutrein, P, additional, Fremond, D, additional, Frere, T, additional, Fumery, M, additional, Gallet, P, additional, Gamblin, C, additional, Ganga-Zandzou, P S, additional, Gérard, R, additional, Geslin, G, additional, Gheyssens, Y, additional, Ghossini, N, additional, Ghrib, S, additional, Gilbert, T, additional, Gillet, B, additional, Godard, D, additional, Godard, P, additional, Godchaux, J M, additional, Godchaux, R, additional, Goegebeur, G, additional, Goria, O, additional, Gottrand, F, additional, Gower, P, additional, Grandmaison, B, additional, Groux, M, additional, Guedon, C, additional, Guillard, J F, additional, Guillem, L, additional, Guillemot, F, additional, Guimber, D, additional, Haddouche, B, additional, Hakim, S, additional, Hanon, D, additional, Hautefeuille, V, additional, Heckestweiller, P, additional, Hecquet, G, additional, Hedde, J P, additional, Hellal, H, additional, Henneresse, P E, additional, Heyman, B, additional, Heraud, M, additional, Herve, S, additional, Hochain, P, additional, Houssin-Bailly, L, additional, Houcke, P, additional, Huguenin, B, additional, Iobagiu, S, additional, Ivanovic, A, additional, Iwanicki-Caron, I, additional, Janicki, E, additional, Jarry, M, additional, Jeu, J, additional, Joly, J P, additional, Jonas, C, additional, Katherin, F, additional, Kerleveo, A, additional, Khachfe, A, additional, Kiriakos, A, additional, Kiriakos, J, additional, Klein, O, additional, Kohut, M, additional, Kornhauser, R, additional, Koutsomanis, D, additional, Laberenne, J E, additional, Laffineur, G, additional, Lagarde, M, additional, Lannoy, P, additional, Lapchin, J, additional, Lapprand, M, additional, Laude, D, additional, Leblanc, R, additional, Lecieux, P, additional, Leclerc, N, additional, Le Couteulx, C, additional, Ledent, J, additional, Lefebvre, J, additional, Lefiliatre, P, additional, Legrand, C, additional, Le Grix, A, additional, Lelong, P, additional, Leluyer, B, additional, Lenaerts, C, additional, Lepileur, L, additional, Leplat, A, additional, Lepoutre-Dujardin, E, additional, Leroi, H, additional, Leroy, M Y, additional, Lesage, J P, additional, Lesage, X, additional, Lesage, J, additional, Lescanne-Darchis, I, additional, Lescut, J, additional, Lescut, D, additional, Leurent, B, additional, Levy, P, additional, Lhermie, M, additional, Lion, A, additional, Lisambert, B, additional, Loire, F, additional, Louf, S, additional, Louvet, A, additional, Luciani, M, additional, Lucidarme, D, additional, Lugand, J, additional, Macaigne, O, additional, Maetz, D, additional, Maillard, D, additional, Mancheron, H, additional, Manolache, O, additional, Marks-Brunel, A B, additional, Marti, R, additional, Martin, F, additional, Martin, G, additional, Marzloff, E, additional, Mathurin, P, additional, Mauillon, J, additional, Maunoury, V, additional, Maupas, J L, additional, Mesnard, B, additional, Metayer, P, additional, Methari, L, additional, Meurisse, B, additional, Meurisse, F, additional, Michaud, L, additional, Mirmaran, X, additional, Modaine, P, additional, Monthe, A, additional, Morel, L, additional, Mortier, P E, additional, Moulin, E, additional, Mouterde, O, additional, Mudry, J, additional, Nachury, M, additional, Khac, N'Guyen E, additional, Notteghem, B, additional, Ollevier, V, additional, Ostyn, A, additional, Ouraghi, A, additional, Ouvry, D, additional, Paillot, B, additional, Panien-Claudot, N, additional, Paoletti, C, additional, Papazian, A, additional, Parent, B, additional, Pariente, B, additional, Paris, J C, additional, Patrier, P, additional, Paupart, L, additional, Pauwels, B, additional, Pauwels, M, additional, Petit, R, additional, Piat, M, additional, Piotte, S, additional, Plane, C, additional, Plouvier, B, additional, Pollet, E, additional, Pommelet, P, additional, Pop, D, additional, Pordes, C, additional, Pouchain, G, additional, Prades, P, additional, Prevost, A, additional, Prevost, J C, additional, Quesnel, B, additional, Queuniet, A M, additional, Quinton, J F, additional, Rabache, A, additional, Rabelle, P, additional, Raclot, G, additional, Ratajczyk, S, additional, Rault, D, additional, Razemon, V, additional, Reix, N, additional, Revillon, M, additional, Richez, C, additional, Robinson, P, additional, Rodriguez, J, additional, Roger, J, additional, Roux, J M, additional, Rudelli, A, additional, Saber, A, additional, Savoye, G, additional, Schlosseberg, P, additional, Segrestin, M, additional, Seguy, D, additional, Serin, M, additional, Seryer, A, additional, Sevenet, F, additional, Shekh, N, additional, Silvie, J, additional, Simon, V, additional, Spyckerelle, C, additional, Talbodec, N, additional, Techy, A, additional, Thelu, J L, additional, Thevenin, A, additional, Thiebault, H, additional, Thomas, J, additional, Thorel, J M, additional, Tielman, G, additional, Tode, M, additional, Toisin, J, additional, Tonnel, J, additional, Touchais, J Y, additional, Touze, Y, additional, Tranvouez, J L, additional, Triplet, C, additional, Turck, D, additional, Uhlen, S, additional, Vaillant, E, additional, Valmage, C, additional, Vanco, D, additional, Vandamme, H, additional, Vanderbecq, E, additional, Eecken, Vander E, additional, Vandermolen, P, additional, Vandevenne, P, additional, Vandeville, L, additional, Vandewalle, A, additional, Vandewalle, C, additional, Vaneslander, P, additional, Vanhoove, J P, additional, Vanrenterghem, A, additional, Varlet, P, additional, Vasies, I, additional, Verbiese, G, additional, Vernier-Massouille, G, additional, Vermelle, P, additional, Verne, C, additional, Vezilier-Cocq, P, additional, Vigneron, B, additional, Vincendet, M, additional, Viot, J, additional, Voiment, Y M, additional, Wacrenier, A, additional, Waeghemaecker, L, additional, Wallez, J Y, additional, Wantiez, M, additional, Wartel, F, additional, Weber, J, additional, Willocquet, J L, additional, Wizla, N, additional, Wolschies, E, additional, Zalar, A, additional, Zaouri, B, additional, Zellweger, A, additional, and Ziade, C, additional

Published
2018
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25. Comportamiento fisiológico de variedades de papa (Solanum tuberosum L.) bajo condiciones de sequia

Author

Mamani Rojas, P., François Ledent, J., Mamani Rojas, P., and François Ledent, J.

Abstract

En las regiones montañosas andinas de Tiraque, Cochabamba, Bolivia y en dos años consecutivos se evaluaron seis variedades de papa contrastantes en su tolerancia a la sequía, en condiciones semi-controladas usando pequeños contenedores apropiados para la siembra y bajo una cubierta tipo tinglado que sirvió de resguardo de la lluvia. El objetivo fue identificar parámetros fisiológicos en la papa que sean sensibles a la sequia y que estén asociados con la productividad del cultivo. Se aplicaron tres regímenes de agua: R0 = riego a capacidad de campo (testigo), R1 = sequía al inicio de la tuberización (sequía temprana) y R2 = sequía a un mes del inicio de la tuberización (sequía tardía). Se ha observado que los parámetros fisiológicos Resistencia Difusiva Estomatal (RDE), Transpiración, Potencial Hídrico Foliar (PHF) y Contenido Relativo de Agua Foliar (CRAF), fueron muy variables entre las variedades estudiadas. La sequía aumentó la RDE y redujo el PHF, la Transpiración y el CRAF de todas las variedades. En condiciones de sequía existe una relación inversa entre RDE y Transpiración, RDE y PHF y una relación directa entre PHF y CRAF. De todas las variedades estudiadas, destaca Luk’y porque mantiene una baja transpiración aun en condiciones de RDEs bajas, presenta bajas tasas de transpiración y reduce en menor medida su CRAF. Este comportamiento expresa que su capacidad de regulación del agua es distinta al resto de las variedades. Los mecanismos fisiológicos mas asociados con el rendimiento del cultivo de papa son la RDE, la Transpiración y el PHF.

Published
2015

26. Efecto de la sequía en la morfologia, crecimiento y productividad de genotipos de papa (solanum tuberosum l.) en Bolivia

Author

Mamani Rojas, P., François Ledent, J., Mamani Rojas, P., and François Ledent, J.

Abstract

En las regiones montañosas andinas de Tiraque, Cochabamba, Bolivia y en dos años consecutivos se evaluaron seis variedades de papa contrastantes en su tolerancia a la sequía, en condiciones semi-controladas usando pequeños contenedores apropiados para la siembra y bajo una cubierta tipo tinglado que sirvió de resguardo de la lluvia. El objetivo fue determinar los mecanismos morfológicos utilizados por la papa para adaptase a la sequía e identificar parámetros morfológicos sensibles a la sequía que estén asociados con el rendimiento del cultivo. Se aplicaron tres regímenes de agua: R0 = riego a capacidad de campo (testigo), R1 = sequía al inicio de la tuberización (sequía temprana) y R2 = sequía a un mes del inicio de la tuberización (sequía tardía). Se evaluaron parámetros morfológicos, variables de crecimiento, variables de daño y componentes de rendimiento. Se observaron grandes diferencias morfológicas entre variedades y se determino que la sequía temprana tiene un mayor efecto en la morfología de la planta que la sequía tardía. La tipología morfológica de las variedades sensibles y tolerantes muestra diferencias substanciales entre ellas. Se demostró que en la mayoría de las variedades la altura de planta, el número de entrenudos, el número de hojas y el número de ramas fueron las variables morfológicas más afectadas por la sequía temprana. De todas ellas, la susceptibilidad a la sequía del número de ramas está marcadamente asociada a la susceptibilidad del rendimiento de cada variedad. Como un índice más estricto para elegir material productivo en condiciones de sequía, se estimó el índice de “Susceptibilidad potencial del rendimiento” el cual al estar asociado con la susceptibilidad del número de ramas y del número de hojas, pueden ser usados como indicadores de tolerancia a la sequía. Por otra parte se destaca las características de la variedad Waych’a que difiere de las otras en términos de su mayor velocidad de crecimiento, el aumento de su índice de raíz

Published
2014

27. Provincial out-migration patterns of Canadian elderly: characterization and explanation

Author

Ledent, J. and Liaw, K-L.

Subjects
Canada -- Emigration and immigration, Migration, Internal -- Canada, Canadians -- Social aspects, Aged -- Emigration and immigration, Environmental issues
Abstract

Interprovincial migration patterns of Canada's elderly are examined and compared with their nonelderly counterparts, by using data from Revenue Canada's income tax file for a fifteen-year period (1966/67-1980/81). First, in a simple descriptive analysis it is shown that, despite becoming increasingly different through time, the departure rates as well as the patterns of destination choice of the two groups were broadly similar. Second, a multivariate statistical analysis, carried out using a nested logit model, reveals that (1) the pattern of destination choice of the elderly was relatively sensitive (even more so through time) to environmental factors, whereas that of the nonelderly was relatively sensitive to labor-market variables, and that (2) the variation in provincial departure rates (for both groups) depended significantly on the size and composition of the origin population as well as the drawing power of the rest of the system. In particular, our results suggest that the overall decline observed in the elderly's departure rates is the consequence of changing sensitivity to circumstances in the province of origin rather than to circumstances in the potential destinations.

Published
1989

29. Glucosinolatos del isaño (Tropaeolum tuberosum) : Contenido cualitativo y cuantitativo y cambios después de la madurez

Author

UCL - AGRO/BAPA - Département de biologie appliquée et des productions agricoles, Ramallo, Rodrigo, Wathelet, Jean-Paul, Le Boulengé, Éric, Torres, Elizabeth, Marlier, Michel, Ledent, J., Larondelle, Yvan, Libro de resúmes Congreso Internacional de Cultivos Andinos, UCL - AGRO/BAPA - Département de biologie appliquée et des productions agricoles, Ramallo, Rodrigo, Wathelet, Jean-Paul, Le Boulengé, Éric, Torres, Elizabeth, Marlier, Michel, Ledent, J., Larondelle, Yvan, and Libro de resúmes Congreso Internacional de Cultivos Andinos

Published
2004

31. Socio-Demographic Changes and the Pension Problem in Canada

Author

Ledent, J.

Abstract

This study investigates the impact of alternative demographic futures on the Canadian pension system. The Canadian population, disaggregated by age, sex, and marital status, is projected forward to the year 2051 under six alternative sets of assumptions, comprising four sets shared by all national studies (including the benchmark scenario) and two sets specific to this study (including the national scenario). According to these projections, the old age dependency ratio, or ratio of the old age to the working age populations, will be multiplied by about 2.5 between now and 2030 -- slightly less under the benchmark scenario (based on unchanged patterns of fertility, mortality, and marital status change but assuming no external migration) but slightly more under the national scenario (based on a further mortality decline and allowing for external migration at mid-eighties levels). In other words, socio-demographic changes are likely in the future to exert some tremendous pressures on the financing of public pensions. Based on these demographic projections, use of the IIASA pension model reveals the ineluctability of a formidable increase in the contribution rate of workers to the Canada/Quebec Pension Plan so that contributions to this plan continue to counterbalance the benefits offered to retirees (old age benefits to which any Canadian aged 65 and over is entitled are paid out of the general budget). But the increase required could be mitigated by the adoption of accompanying policies, two of which (increase in the labor force participation of men and raise of the retirement age) are also briefly investigated.

Published
1992

45. Assessing Passive Capillary-Wick Samplers for monitoring resident nitrate concentration in real field.

Author

Brahy, V., Henao-Toro, M. C., Goor, F., Ledent, J. F., and Delvaux, B.

Subjects
SOIL composition, NITRATES, VEGETATION monitoring, FOREST soils, LEACHATE, SOIL solutions
Abstract

Evaluates the effectiveness of capillary-wick samplers (PCAPS) for continuous monitoring of resident nitrate concentration in three 'soil-crop-climate' systems differing in soil type, land use and climate. Systems involved including acid silty soils under a beech-oak forest in Belgium, silty soils under wheat cropping and a short rotation willow coppice plantation (SRC) in Belgium, and volcanic ash soils under plantain cultivation with and without urea fertilization in Colombia; What nitrate concentrations indicated; Results of analysis of the soil leachates with respect to leaching of nitrate and alkaline and alkaline-earth cations in similar 'soil-crop-climate' systems; Data suggesting that PCAPS was a suitable tool to collect soil solutions and that it could help to assess nitrate leaching losses in various ecological or cropping conditions.

Published
2002
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50. Increment-decrement life tables: a comment.

Author

Rogers, Andrei, Ledent, Jacques, Rogers, A, and Ledent, J

Subjects
LIFE tables, EQUATIONS, POPULATION, DEMOGRAPHY, EMIGRATION & immigration, MATRICES (Mathematics)
Abstract

The article comments on increment-decrement life tables related to demography. R. Schoen's paper is a valuable addition to the scant literature on increment-decrement life tables. In a recent useful paper, Schoen (1975) poses the problem of constructing a set of k interrelated increment-decrement life tables but presents explicit solutions only for two-table and three-table models. These are derived by solving, in each instance, a set of simultaneous linear equations whose algebraic solution, as Schoen rightly observes, is a bit complicated. In as much as this complexity increases exponentially with larger values of k, the computational economy of a matrix solution becomes especially desirable. A matrix solution also is useful in that it more clearly identifies the correspondence between single-table and k-table formulations. This article derives an equation and illustrates its use in a problem area not included in Schoen's list of potential applications, namely, multiregional life table construction. In this particular application, increments are due to in-migration and decrements result from out-migration.

Published
1976
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