205 research outputs found
Fluctuation and fixation of rodenticide resistance alleles in Rattus norvegicus
No full textBerthier, K., Benoit, E., Berny, P., Lasseur, R., Merville, A., Peigneaux, F., Cosson, J.-F
Simulation of the stretch blow moulding process: from the modelling of the microstructure evolution to the end-use elastic properties of polyethylene terephthalate bottles
No full textThe original publication is available at www.springerlink.comThe whole stretch blow-moulding process of PET bottles is simulated at the usual process temperature in order to predict the elastic end-use properties of the bottles. An anisotropic viscoplastic constitutive law, coupled with microscopic variables, is dentified from uniaxial tensile tests performed at different strain rates and temperatures. The microstructure evolution is characterised by crystallinity measurements from interrupted tests and frozen samples. For each specimen tested, the Young modulus is measured at room temperature. Numerical simulations of the blow moulding process are run using the C-NEM method. A micromechanical modelling is post-processed after the simulation to predict the elastic properties. Predictions of Young modulus distributions in bottles are in agreement with the ones measured on blow-moulded bottles
Through-transmission laser welding of glass fibre composite: Experimental light scattering identification
No full textConcepções de literatura e formação de leitores na Biblioteconomia e Ciência da Informação: provocações a partir da obra “Paradigmas do ensino da literatura”, de Rildo Cosson
No full textPresents a review of the book “Paradigms of teaching literature” by Rildo Cosson in order to highlight the contributions to the area of Librarianship and Information Science. Although the work deals with the teaching of literature, the arguments used by the author capable of broadening and proposing a critical view of literature will be listed in this review, whose understanding is of essential relevance to the performance of the librarian in literary reading spaces. It briefly describes the mapping of the six paradigms identified by Cosson exploring as conceptual, methodological and pragmatic dimensions while, from a historical perspective, points out the virtues and limitations present in each model. It ends with the questioning about the concept of literature in the scope of Librarianship and Information Science and the reflection on the importance of a critical positioning for the field.Apresenta uma resenha do livro “Paradigmas do ensino da literatura”, de autoria de Rildo Cosson a fim de destacar suas contribuições para a área da Biblioteconomia e Ciência da Informação (BCI). Embora a obra trate do ensino da literatura, serão elencados, nesta resenha, os argumentos utilizados pelo autor capazes de alargar e de propor uma visão crítica a respeito da literatura, cuja compreensão é de essencial relevância para a atuação da(o) bibliotecária(o) em espaços de leitura literária. Descreve brevemente o mapeamento dos seis paradigmas identificados por Cosson, em suas dimensões conceituais, metodológicas e pragmáticas, ao tempo em que, a partir de uma perspectiva histórica, pontua as virtudes e limitações presentes em cada modelo. Finaliza com o questionamento acerca do conceito de literatura no âmbito da BCI e a reflexão sobre a importância de um posicionamento crítico para o campo
Modeling of thermoplastic composites laser welding - A ray tracing method associated to thermal simulation
No full textNon-clairvoyant scheduling with progress bars
No full textCitation:
@article{DBLP:journals/corr/abs-2509-19662,
author = {Ziyad Benomar and
Romain Cosson and
Alexander Lindermayr and
Jens Schl{\"{o}}ter},
title = {Non-Clairvoyant Scheduling with Progress Bars},
journal = {CoRR},
volume = {abs/2509.19662},
year = {2025},
url = {https://doi.org/10.48550/arXiv.2509.19662},
doi = {10.48550/ARXIV.2509.19662},
eprinttype = {arXiv},
eprint = {2509.19662},
}In non-clairvoyant scheduling, the goal is to minimize the total job completion time without prior knowledge of individual job processing times. This classical online optimization problem has recently gained attention through the framework of learning-augmented algorithms. We introduce a natural setting in which the scheduler receives continuous feedback in the form of progress bars: estimates of the fraction of each job completed over time. We design new algorithms for both adversarial and stochastic progress bars and prove strong competitive bounds. Our results in the adversarial case surprisingly induce improved guarantees for learning-augmented scheduling with job size predictions. We also introduce a general method for combining scheduling algorithms, yielding further insights in scheduling with predictions. Finally, we propose a stochastic model of progress bars as a more optimistic alternative to conventional worst-case models, and present an asymptotically optimal scheduling algorithm in this setting
Numerical Infrared Heating of semi-transparent Thermoplastic Using Ray Tracing Method
No full textInternational audienceThermoforming process include a heating stage of the thermoplastic specimen by infrared heaters. The knowledge of the temperature distribution on the surface and through the thickness of the preform is important to make good prediction of thickness and properties of the manufactured part. Currently in industry, the fitting of the process parameters is given by experience and it is expensive. Our objective is to provide tools that are able to simulate the heat transfers between the infrared heaters and the specimen in order to reduce the fitting cost and to control the qualities of the end product. We use the optical method called " ray tracing " (RTM) to simulate the radiative transfer. First, we compare the RTM with the shape factor method on a simple example: the heating of a square sheet by one infrared lamp. Then, we show the 3D heating stage of a rectangular specimen. In that case, we use 6 lamps to simulate an infrared oven. The RTM allows to compute a source term in the transient heat balance equation. We can use commercial codes to solve the heat balance equation
Numerical Infrared Heating of semi-transparent Thermoplastic Using Ray Tracing Method
No full textInternational audienceThermoforming process include a heating stage of the thermoplastic specimen by infrared heaters. The knowledge of the temperature distribution on the surface and through the thickness of the preform is important to make good prediction of thickness and properties of the manufactured part. Currently in industry, the fitting of the process parameters is given by experience and it is expensive. Our objective is to provide tools that are able to simulate the heat transfers between the infrared heaters and the specimen in order to reduce the fitting cost and to control the qualities of the end product. We use the optical method called " ray tracing " (RTM) to simulate the radiative transfer. First, we compare the RTM with the shape factor method on a simple example: the heating of a square sheet by one infrared lamp. Then, we show the 3D heating stage of a rectangular specimen. In that case, we use 6 lamps to simulate an infrared oven. The RTM allows to compute a source term in the transient heat balance equation. We can use commercial codes to solve the heat balance equation
Numerical Infrared Heating of semi-transparent Thermoplastic Using Ray Tracing Method
No full textInternational audienceThermoforming process include a heating stage of the thermoplastic specimen by infrared heaters. The knowledge of the temperature distribution on the surface and through the thickness of the preform is important to make good prediction of thickness and properties of the manufactured part. Currently in industry, the fitting of the process parameters is given by experience and it is expensive. Our objective is to provide tools that are able to simulate the heat transfers between the infrared heaters and the specimen in order to reduce the fitting cost and to control the qualities of the end product. We use the optical method called " ray tracing " (RTM) to simulate the radiative transfer. First, we compare the RTM with the shape factor method on a simple example: the heating of a square sheet by one infrared lamp. Then, we show the 3D heating stage of a rectangular specimen. In that case, we use 6 lamps to simulate an infrared oven. The RTM allows to compute a source term in the transient heat balance equation. We can use commercial codes to solve the heat balance equation
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