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1,535 results on '"Martin, Florian"'

1. Well-posedness and long-term behaviour of buffered flows in infinite networks

Author

Dobrick, Alexander and Martin, Florian G.

Subjects
Mathematics - Analysis of PDEs, Mathematics - Functional Analysis, 47D06, 35R02, 47D07, 60K20
Abstract

We consider a transport problem on an infinite metric graph and discuss its well-posedness and long-term behaviour under the condition that the mass flow is buffered in at least one of the vertices. In order to show the well-posedness of the problem, we employ the theory of $C_0$-semigroups and prove a Desch--Schappacher type perturbation theorem for dispersive semigroups. Investigating the long-term behaviour of the system, we prove irreducibility of the semigroup under the assumption that the underlying graph is strongly connected and an additional spectral condition on its adjacency matrix. Moreover, we employ recent results about the convergence of stochastic semigroups that dominate a kernel operator to prove that the solutions converge strongly to equilibrium. Finally, we prove that the solutions converge uniformly under more restrictive assumptions.

Published
2024

3. Sepsis-trained macrophages promote antitumoral tissue-resident T cells

Author

Broquet, Alexis, Gourain, Victor, Goronflot, Thomas, Le Mabecque, Virginie, Sinha, Debajyoti, Ashayeripanah, Mitra, Jacqueline, Cédric, Martin, Pierre, Davieau, Marion, Boutin, Lea, Poulain, Cecile, Martin, Florian P., Fourgeux, Cynthia, Petrier, Melanie, Cannevet, Manon, Leclercq, Thomas, Guillonneau, Maeva, Chaumette, Tanguy, Laurent, Thomas, Harly, Christelle, Scotet, Emmanuel, Legentil, Laurent, Ferrières, Vincent, Corgnac, Stephanie, Mami-Chouaib, Fathia, Mosnier, Jean Francois, Mauduit, Nicolas, McWilliam, Hamish E. G., Villadangos, Jose A., Gourraud, Pierre Antoine, Asehnoune, Karim, Poschmann, Jeremie, and Roquilly, Antoine

Published
2024
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4. Author Correction: Sepsis-trained macrophages promote antitumoral tissue-resident T cells

Author

Broquet, Alexis, Gourain, Victor, Goronflot, Thomas, Le Mabecque, Virginie, Sinha, Debajyoti, Ashayeripanah, Mitra, Jacqueline, Cédric, Martin, Pierre, Davieau, Marion, Boutin, Lea, Poulain, Cecile, Martin, Florian P., Fourgeux, Cynthia, Petrier, Melanie, Cannevet, Manon, Leclercq, Thomas, Guillonneau, Maeva, Chaumette, Tanguy, Laurent, Thomas, Harly, Christelle, Scotet, Emmanuel, Legentil, Laurent, Ferrières, Vincent, Corgnac, Stephanie, Mami-Chouaib, Fathia, Mosnier, Jean Francois, Mauduit, Nicolas, McWilliam, Hamish E. G., Villadangos, Jose A., Gourraud, Pierre Antoine, Asehnoune, Karim, Poschmann, Jeremie, and Roquilly, Antoine

Published
2024
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7. Variations in Canine Behavioural Characteristics across Conventional Breed Clusters and Most Common Breed-Based Public Stereotypes

Author

Barbara Peťková, Lenka Skurková, Martin Florian, Monika Slivková, Zuzana Dudra Kasičová, and Jana Kottferová

Subjects
dog, behaviour, dog personality, aggression, breed differences, Veterinary medicine, SF600-1100, Zoology, QL1-991
Abstract

Dog breeds are grouped based on scientific agreement, whether for traditional reasons or specific tasks during their domestication. Discrepancies may occur between public views of breed behaviour and actual evidence. This research aims to investigate differences in five behavioural traits (aggression towards people, aggression towards animals, fearfulness, responsiveness to training, and activity/excitability) by using the Dog Personality Questionnaire (DPQ) across six conventional groups/clusters of dog breeds (herding, hunting, guarding, companion dogs, potentially aggressive breeds, and mixed-breed dogs) and to assess hypotheses derived from common public presumptions. A cohort of 1309 dog owners sourced through diverse online platforms took part in the study. Contrary to stereotypes, the findings indicate that breeds labelled as “potentially aggressive” display lower levels of aggression compared to guarding breeds (χ2 (5) = 3.657, p = 0.041) and mixed-breeds (χ2 (5) = 3.870, p = 0.002). Additionally, mixed-breed dogs exhibited the highest levels of fearfulness among the six conventional clusters. In terms of aggression and gender, males demonstrated higher aggression levels towards both humans and animals compared to females (p = 0.001). These results challenge established assumptions and emphasise the necessity of evidence-based methodologies in the assessment of canine behaviour.

Published
2024
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8. Trimmed Spline Surfaces with Accurate Boundary Control

Author

Martin, Florian and Reif, Ulrich

Subjects
Computer Science - Graphics, Computer Science - Computational Geometry
Abstract

We introduce trimmed NURBS surfaces with accurate boundary control, briefly called ABC-surfaces, as a solution to the notorious problem of constructing watertight or smooth ($G^1$ and $G^2)$ multi-patch surfaces within the function range of standard CAD/CAM systems and the associated file exchange formats. Our construction is based on the appropriate blend of a base surface, which traces out the intended global shape, and a series of reparametrized ribbons, which dominate the shape near the boundary.

Published
2020

9. Uniform convergence of stochastic semigroups

Author

Glück, Jochen and Martin, Florian G.

Subjects
Mathematics - Functional Analysis, 47D06, 47D07
Abstract

For stochastic $C_0$-semigroups on $L^1$-spaces there is wealth of results that show strong convergence to an equilibrium as $t \to \infty$, given that the semigroup contains a partial integral operator. This has plenty of applications to transport equations and in mathematical biology. However, up to now partial integral operators do not play a prominent role in theorems which yield uniform convergence of the semigroup rather than only strong convergence. In this article we prove that, for irreducible stochastic semigroups, uniform convergence to an equilibrium is actually equivalent to being partially integral and uniformly mean ergodic. In addition to this Tauberian theorem, we also show that our semigroup is uniformly convergent if and only if it is partially integral and the dual semigroup satisfies a certain irreducibility condition. Our proof is based on a uniform version of a lower bound theorem of Lasota and Yorke, which we combine with various techniques from Banach lattice theory., Comment: 12 pages

Published
2020

13. Anxiety and depression symptoms in relatives of moderate-to-severe traumatic brain injury survivors — A multicentre cohort

Author

Cinotti, Raphaël, Chopin, Alice, Moyer, Jean Denis, Huet, Olivier, Lasocki, Sigismond, Cohen, Benjamin, Dahyot-Fizelier, Claire, Chalard, Kevin, Seguin, Philippe, Martin, Florian Pierre, Lerebourg, Céline, Guitteny, Marie, Chenet, Amandine, Perrouin-Verbe, Brigitte, Asehnoune, Karim, Feuillet, Fanny, Sébille, Véronique, and Roquilly, Antoine

Published
2023
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17. Trimmed Spline Surfaces with Accurate Boundary Control

Author

Martin, Florian, Reif, Ulrich, Alberti, Giovanni, Series Editor, Patrizio, Giorgio, Editor-in-Chief, Bracci, Filippo, Series Editor, Canuto, Claudio, Series Editor, Ferone, Vincenzo, Series Editor, Fontanari, Claudio, Series Editor, Moscariello, Gioconda, Series Editor, Pistoia, Angela, Series Editor, Sammartino, Marco, Series Editor, Manni, Carla, editor, and Speleers, Hendrik, editor

Published
2022
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19. A Data-Driven Approach to Ship Energy Management: Incorporating Automated Tracking System Data and Weather Information

Author

Cem Ünlübayir, Ulrich Hermann Mierendorff, Martin Florian Börner, Katharina Lilith Quade, Alexander Blömeke, Florian Ringbeck, and Dirk Uwe Sauer

Subjects
energy management, load prediction, hybrid marine propulsion system, SOFC-powered ships, Naval architecture. Shipbuilding. Marine engineering, VM1-989, Oceanography, GC1-1581
Abstract

This research paper presents a data-based energy management method for a vessel that predicts the upcoming load demands based on data from weather information and its automated tracking system. The vessel is powered by a hybrid propulsion system consisting of a high-temperature fuel cell system to cover the base load and a battery system to compensate for the fuel cell’s limited dynamic response capability to load fluctuations. The developed energy management method predicts the load demand of the next time steps by analyzing physical relationships utilizing operational and positional data of a real vessel. This allows a steadier operation of the fuel cell and reduces stress factors leading to accelerated aging and increasing the resource efficiency of the propulsion system. Since large ships record tracking data of their cruise and no a priori training is required to adjust the energy management, the proposed method can be implemented with small additional computational effort. The functionality of the energy management method was verified using data from a real ship and records of the water currents in the North Sea. The accuracy of the load prediction is 2.7% and the attenuation of the fuel cell’s power output could be increased by approximately 32%.

Published
2023
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30. Systems Toxicology Approach to Unravel Early Indicators of Squamous Cell Carcinoma Rate in Rat Nasal Epithelium Induced by Formaldehyde Exposure

Author

Martin, Florian, Talikka, Marja, Hoeng, Julia, Peitsch, Manuel C., Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Fdez-Riverola, Florentino, editor, Rocha, Miguel, editor, Mohamad, Mohd Saberi, editor, Zaki, Nazar, editor, and Castellanos-Garzón, José A., editor

Published
2020
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32. Discovery of a Myeloid Cell Leukemia 1 (Mcl-1) Inhibitor That Demonstrates Potent In Vivo Activities in Mouse Models of Hematological and Solid Tumors.

Author

Tarr, James C., Salovich, James M., Aichinger, Martin, Jeon, KyuOk, Veerasamy, Nagarathanam, Sensintaffar, John L., Arnhof, Heribert, Samwer, Matthias, Christov, Plamen P., Kim, Kwangho, Wunberg, Tobias, Schweifer, Norbert, Trapani, Francesca, Arnold, Allison, Martin, Florian, Zhao, Bin, Miriyala, Nagaraju, Sgubin, Danielle, Fogarty, Stuart, and Moore, William J.

Published
2024
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33. Unplanned 30‐day readmission rate after ophthalmological surgery as a quality‐of‐care indicator.

Author

Crozet, Audrey, Leclere, Brice, Martin, Florian, Goronflot, Thomas, Cazet, Lucie, Ducloyer, Jean‐Baptiste, Le Meur, Guylène, and Lebranchu, Pierre

Subjects
RETINAL surgery, PATIENT readmissions, OPHTHALMIC surgery, TRAUMA surgery, ELECTIVE surgery, CATARACT surgery
Abstract

Background: The 30‐day readmission rate provides a standardised quantitative evaluation of some postoperative complications. It is widely used worldwide in many medical and surgical specialities, and the World Health Organization recommends its use for monitoring healthcare system performance. In ophthalmology, its measurement is biased by the frequent and close planned surgery on one eye and then the other, particularly in the case of cataract surgery. This study measures the 30‐day unplanned readmission rate in ophthalmology, globally and by surgery subtype, and describes the causes of readmission. Methods: All patients readmitted within 30 days of ophthalmic surgery at Nantes University Hospital between January 2017 and December 2020 were identified in the Medical Information System. An ophthalmologist examined each medical record and collected the following data: the reason for readmission, comorbidities, the pathology treated, surgery type, surgery duration, the surgeon's experience, anaesthesia type, severity and readmission morbidity. Results: For the 8522 ophthalmic surgeries performed in the four‐year study period, 282 30‐day unplanned readmissions were identified. The overall 30‐day unplanned readmission rate was 2.07% for elective surgery, with a high variability depending on the surgery type: 0.95% for phacoemulsification, 4.95% for vitreoretinal surgery (3.42% for non‐elective vitreoretinal surgery, 5.44% for retinal detachment surgery), 5.66% for deep lamellar keratoplasty and 11.90% for trabeculectomy. The unplanned 30‐day readmission rate for ocular trauma surgery (emergency care) was 11.0%. Seven percent of all unplanned 30‐day readmissions were not associated with an ophthalmological problem. Conclusions: This study is the first to report 30‐day unplanned readmission in ophthalmology, globally and by surgical subtype, for elective and urgent procedures. This indicator can be used longitudinally to detect an increase in risk or transversely to compare the quality of care between different public or private hospitals. [ABSTRACT FROM AUTHOR]

Published
2024
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36. Synergy, suppression and immorality: forward differences of the entropy function

Author

Whittaker, Joe, Martin, Florian, and Xiang, Yang

Subjects
Statistics - Methodology
Abstract

Conditional mutual information is important in the selection and interpretation of graphical models. Its empirical version is well known as a generalised likelihood ratio test and that it may be represented as a difference in entropy. We consider the forward difference expansion of the entropy function defined on all subsets of the variables under study. The elements of this expansion are invariant to permutation of their suffices and relate higher order mutual informations to lower order ones. The third order difference is expressible as an, apparently assymmetric, difference between a marginal and a conditional mutual information. Its role in the decomposition for explained information provides a technical definition for synergy between three random variables. Positive values occur when two variables provide alternative explanations for a third; negative values, termed synergies, occur when the sum of explained information is greater than the sum of its parts. Synergies tend to be infrequent; they connect the seemingly unrelated concepts of suppressor variables in regression, on the one hand, and unshielded colliders in Bayes networks (immoralities), on the other. We give novel characterizations of these phenomena that generalise to categorical variables and to higher dimensions. We propose an algorithm for systematically computing low order differences from a given graph. Examples from small scale real-life studies indicate the potential of these techniques for empirical statistical analysis.

Published
2015

39. Structural, functional, and molecular impact on the cardiovascular system in ApoE-/- mice exposed to aerosol from candidate modified risk tobacco products, Carbon Heated Tobacco Product 1.2 and Tobacco Heating System 2.2, compared with cigarette smoke

Author

Szostak, Justyna, Titz, Bjoern, Schlage, Walter K., Guedj, Emmanuel, Sewer, Alain, Phillips, Blaine, Leroy, Patrice, Buettner, Ansgar, Neau, Laurent, Trivedi, Keyur, Martin, Florian, Ivanov, Nikolai V., Vanscheeuwijck, Patrick, Peitsch, Manuel C., and Hoeng, Julia

Published
2020
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41. Systems toxicology assessment of a representative e-liquid formulation using human primary bronchial epithelial cells

Author

Marescotti, Diego, Mathis, Carole, Belcastro, Vincenzo, Leroy, Patrice, Acali, Stefano, Martin, Florian, Dulize, Rémi, Bornand, David, Peric, Dariusz, Guedj, Emmanuel, Ortega Torres, Laura, Biasioli, Matteo, Fuhrimann, Matthieu, Fernandes, Estela, Frauendorfer, Felix, Gonzalez Suarez, Ignacio, Sciuscio, Davide, Ivanov, Nikolai V., Peitsch, Manuel C., and Hoeng, Julia

Published
2020
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42. Multi-omics systems toxicology study of mouse lung assessing the effects of aerosols from two heat-not-burn tobacco products and cigarette smoke

Author

Titz, Bjoern, Szostak, Justyna, Sewer, Alain, Phillips, Blaine, Nury, Catherine, Schneider, Thomas, Dijon, Sophie, Lavrynenko, Oksana, Elamin, Ashraf, Guedj, Emmanuel, Tsin Wong, Ee, Lebrun, Stefan, Vuillaume, Grégory, Kondylis, Athanasios, Gubian, Sylvain, Cano, Stephane, Leroy, Patrice, Keppler, Brian, Ivanov, Nikolai V., Vanscheeuwijck, Patrick, Martin, Florian, Peitsch, Manuel C., and Hoeng, Julia

Published
2020
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48. A six-month systems toxicology inhalation/cessation study in ApoE−/− mice to investigate cardiovascular and respiratory exposure effects of modified risk tobacco products, CHTP 1.2 and THS 2.2, compared with conventional cigarettes

Author

Phillips, Blaine, Szostak, Justyna, Titz, Bjoern, Schlage, Walter K., Guedj, Emmanuel, Leroy, Patrice, Vuillaume, Gregory, Martin, Florian, Buettner, Ansgar, Elamin, Ashraf, Sewer, Alain, Sierro, Nicolas, Choukrallah, Mohamed Amin, Schneider, Thomas, Ivanov, Nikolai V., Teng, Charles, Tung, Ching Keong, Lim, Wei Ting, Yeo, Ying Shan, Vanscheeuwijck, Patrick, Peitsch, Manuel C., and Hoeng, Julia

Published
2019
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