Influence of irradiation parameters on the polymerization of ceramic reactive suspensions for stereolithography

Stereolithography is an additive manufacturing process which makes it possible to fabricate useful complex 3D ceramic parts, with a high dimensional resolution and a good surface finish. Stereolithography is based on the selective UV polymerization of a reactive system consisting in a dispersion of ceramic particles in a curable monomer/oligomer resin. In order to reach a homogeneous polymerization in the green part, and to limit the risk of cracking and/or deformation during subsequent stages of debinding and sintering due to internal stresses, the influence of various fabrication parameters (laser power, scanning speed, number of irradiations) on the degree of polymerization was investigated. In addition, the impact of the irradiation of the subsequent upper layers onto the previously deposited and irradiated layers was evaluated. The degree of conversion was determined by Fourier Transform Infrared Spectroscopy (FTIR). Raman spectroscopy was also used and a brief comparison between these two methods is given

Neurogenic bladder: etiology and assessment

A review of the various causes of neurologic impairment to the lower urinary tract in children was the aim of this presentation. The emphasis was on diagnosis, pathophysiology, and treatment that strive to maintain as normal a function as possible in order to achieve eventual urinary continence and health of the upper urinary tract. The latest principles based on the most up to date evidence are promulgated but with an eye towards historical prospective. The reader should gain an adequate understanding of various disorders that comprise this condition and feel comfortable with proposing options for management when faced with the responsibility of caring for an affected child

BLOOM: A 176B-Parameter Open-Access Multilingual Language Model

Large language models (LLMs) have been shown to be able to perform new tasks based on a few demonstrations or natural language instructions. While these capabilities have led to widespread adoption, most LLMs are developed by resource-rich organizations and are frequently kept from the public. As a step towards democratizing this powerful technology, we present BLOOM, a 176B-parameter open-access language model designed and built thanks to a collaboration of hundreds of researchers. BLOOM is a decoder-only Transformer language model that was trained on the ROOTS corpus, a dataset comprising hundreds of sources in 46 natural and 13 programming languages (59 in total). We find that BLOOM achieves competitive performance on a wide variety of benchmarks, with stronger results after undergoing multitask prompted finetuning. To facilitate future research and applications using LLMs, we publicly release our models and code under the Responsible AI License

Caractérisation de protéines de surface chez la blatte Leucophaea maderae (Blaberidae, Oxyhaloinae)

Chez L. maderae, les femelles et les mâles sécrètent un mélange de protéines sur toute la surface de l'abdomen. Les sternites du mâle produisent également la phéromone sexuelle alors que les sécrétions tergales sont léchées et ingérées par la femelle au cours du comportement sexuel. Les sécrétions sont composées de quatre protéines majoritaires de 18 (Lma-p18), 22 (Lma-p22), 54 (Lma-p54) et 72 kDa (Lma-p72). Lma-p18, Lma-p22 et Lma-p72 sont des protéines spécifiques du mâle. Les deux premières sont présentes uniquement dans les sécrétions tergales alors que Lma-p72 est plus abondante au niveau des sternites. Lma-p54 est présente chez les deux sexes. L'obtention de microséquences peptidiques a permis la détermination des séquences complètes des ADNc correspondant à ces protéines en utilisant des stratégies de RT-PCR et RACE-PCR. Lma-p18, comme Lma-p22, appartiendrait à la superfamille des calycines qui sont des protéines de transport pour des molécules hydrophobes. Ces protéines pourraient donc avoir comme ligands des composés volatils de la phéromone sexuelle mâle. La localisation du transcrit de Lma-p18 dans une région glandulaire exposée uniquement lors du comportement précopulatoire appuie cette hypothèse...DIJON-BU Sciences Economie (212312102) / SudocSudocFranceF

The Cassignol technique for potassium—Argon dating, precision and accuracy: Examples from the Late Pleistocene to Recent volcanics from southern Italy

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Predicting Quaternary hominin climatic niches using faunal assemblages with random forest algorithms

International audienceThe Quaternary period (2.58 MYA - today) has been characterized by a series of abrupt climatic fluctuations and a global trend of cooling and aridification. In Africa, these changes had substantial impact on landscapes and led to shifts in faunal communities, which resulted in the gradual establishment of present-day faunas. This period also coincides with major events in the hominin evolution, including the appearance and diversification of the genera Homo and Paranthropus , the development of new lithic technologies, and the adoption of new food and resources acquisition strategies. Therefore, understanding the intricate relationship between the human evolutionary history and the environmental and climatic shifts of the Quaternary period is a fundamental focus within the field of human origins research. For palaeoenvironmental reconstructions based on terrestrial vertebrate faunas, two clades of mammals have historically received great attention: rodents and bovids. Both provide useful ecological information, yet they are rarely used simultaneously for palaeoenvironmental reconstruction as they have specific modes of accumulation and preservation of their remains.In this contribution, we developed a novel approach for retrodicting past climate conditions of several African hominin-bearing fossil sites from the Quaternary based on the composition of the rodent and bovid palaeocommunities, using random forest (RF) algorithms for robust predictive modeling

Predicting Quaternary hominin climatic niches using faunal assemblages with random forest algorithms

The Quaternary period (2.58 MYA - today) has been characterized by a series of abrupt climatic fluctuations and a global trend of cooling and aridification. In Africa, these changes had substantial impact on landscapes and led to shifts in faunal communities, which resulted in the gradual establishment of present-day faunas. This period also coincides with major events in the hominin evolution, including the appearance and diversification of the genera Homo and Paranthropus , the development of new lithic technologies, and the adoption of new food and resources acquisition strategies. Therefore, understanding the intricate relationship between the human evolutionary history and the environmental and climatic shifts of the Quaternary period is a fundamental focus within the field of human origins research. For palaeoenvironmental reconstructions based on terrestrial vertebrate faunas, two clades of mammals have historically received great attention: rodents and bovids. Both provide useful ecological information, yet they are rarely used simultaneously for palaeoenvironmental reconstruction as they have specific modes of accumulation and preservation of their remains.In this contribution, we developed a novel approach for retrodicting past climate conditions of several African hominin-bearing fossil sites from the Quaternary based on the composition of the rodent and bovid palaeocommunities, using random forest (RF) algorithms for robust predictive modeling

Reconstructing Quaternary paleoclimates from the faunal composition of African paleoanthropological sites with machine learning

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New data on the distribution of the two mole species Talpa aquitania Nicolas, Matinez-Vargas & Hugot, 2017 and T. europaea Linnaeus, 1758 in France based on museum and newly collected specimens

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