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An approach to the representation and documentation of craft processes is proposed. The proposed approach is a method for the systematic identification and digital representation of pertinent data, information, and knowledge. The outcome representation is compatible with contemporary digitisation practices and digital preservation standards. The implementation of the approach is provided within the context of an online platform that is accompanied by auxiliary tools for digital curation. This platform is a multiple user system, where craft representations can be collaboratively authored, shared, displayed, and digitally preserved in standardised formats. Basic uses of this scheme and presentational applications are provided, along with identification of future work and limitations. International audience

The PICOSEC-Micromegas detector was developed for precise timing of the arrival of charged particles with a resolution bellow 30 ps. This contribution, after a brief introduction presents results concerning the PICOSEC-Micromegas response to single photoelectrons, estimation of the photoelectron yield of various photocathode types, as well as its performance to time the arrival of test beam muons. In addition, results based on detailed simulation studies and a stochastic model developed for the understanding of the detector are presented. Finally, results of studies related to the development of large scale PICOSEC-Micromegas detector for practical applications are also presented, in particular, the timing performance of a multi-channel PICOSEC prototype. 6th Micro-Pattern Gaseous Detectors Conference (MPGD 2019), 5-10 May 2019, La Rochelle, France International audience

The paper discusses aspects of cooking pottery technology and operation through observations made in a series of experiments, utilizing the results of archaeological ceramic analysis in Neolithic northern Greece. The first stage of experiments focused on the experimental manufacture of three types of cooking pots, following the Neolithic techniques, from raw material processing to firing. In the second stage the pots were used in cooking performances, using structures, fuel and contents identified in the archaeological record. The qualitative data generated allow for testing a series of archaeological assumptions on ceramic technology, particularly vessel building and firing, along with the effects of cooking on pots. Moreover, experimental cooking provided insight to the relations between the different participant parts, highlighting the pivotal relation of cooking pots to fuel and different cooking modes. This pilot study aspires to endorse ceramicists to refine protocols for future experiments and analyses on cooking technologies. International audience

Automatic depression assessment based on visual cues is a rapidly growing research domain. The present exhaustive review of existing approaches as reported in over sixty publications during the last ten years focuses on image processing and machine learning algorithms. Visual manifestations of depression, various procedures used for data collection, and existing datasets are summarized. The review outlines methods and algorithms for visual feature extraction, dimensionality reduction, decision methods for classification and regression approaches, as well as different fusion strategies. A quantitative meta-analysis of reported results, relying on performance metrics robust to chance, is included, identifying general trends and key unresolved issues to be considered in future studies of automatic depression assessment utilizing visual cues alone or in combination with vocal or verbal cues.Visualization; Affective computing; Monitoring; Europe; Mood; Reliability; Tools; Depression assessment; affective computing; facial expression; machine learning; facial image analysis International audience

© 2018 The Authors This paper addresses for the first time a large body of archaeobotanical data from prehistoric Southeastern Europe, mostly published for the first time, that correspond to cereal food preparations. The evidence presented here comes from 20 sites situated in Greece and Bulgaria, spanning the Early Neolithic through to the Iron Age (7th millennium B.C.-1st millennium B.C.). The remains correspond to cereal fragments or agglomerations of fragments that resulted from ancient food preparation steps such as grinding, boiling, sprouting/malting, mixing in bread-like or porridge-like foodstuffs. The article builds on previous pilot studies and with the aid of stereomicroscopy and scanning electron microscopy offers a first classification and possible interpretations of the finds leading to the recipes that might have generated them. At the same time the article highlights the significance of retrieving and studying in depth such rare archaeobotanical finds, points out the interpretative problems stemming from such material and suggests ways forward to address similar archaeological finds in different parts of the world. The paper demonstrates the potential of the systematic study of cereal-based food remains, in our case prehistoric Southeastern Europe, to reveal a wide variability in cereal food transformation practices, suggestive of the interplay between available ingredients, cultural traditions and the complex interaction between society and environment. ispartof: JOURNAL OF ARCHAEOLOGICAL SCIENCE vol:104 pages:97-113 status: published

Over 60 years ago, stone tools and remains of megafauna were discovered on the Southeast Asian islands of Flores, Sulawesi and Luzon, and a Middle Pleistocene colonization by Homo erectus was initially proposed to have occurred on these islands 1-4. However, until the discovery of Homo floresiensis in 2003, claims of the presence of archaic hominins on Wallacean islands were hypothetical owing to the absence of in situ fossils and/or stone artefacts that were excavated from well-documented stratigraphic contexts, or because secure numerical dating methods of these sites were lacking. As a consequence, these claims were generally treated with scepticism 5. Here we describe the results of recent excavations at Kalinga in the Cagayan Valley of northern Luzon in the Philippines that have yielded 57 stone tools associated with an almost-complete disarticulated skeleton of Rhinoceros philippinensis, which shows clear signs of butchery, together with other fossil fauna remains attributed to stegodon, Philippine brown deer, freshwater turtle and monitor lizard. All finds originate from a clay-rich bone bed that was dated to between 777 and 631 thousand years ago using electron-spin resonance methods that were applied to tooth enamel and fluvial quartz. This evidence pushes back the proven period of colonization 6 of the Philippines by hundreds of thousands of years, and furthermore suggests that early overseas dispersal in Island South East Asia by premodern hominins took place several times during the Early and Middle Pleistocene stages 1-4. The Philippines therefore may have had a central role in southward movements into Wallacea, not only of Pleistocene megafauna 7 , but also of archaic hominins. The most recent recoveries in Flores 8,9 and Sulawesi 10 (Indonesia) provide a unique documentation of overseas hominin dispersal during the early Middle Pleistocene epoch. An early presence in the Philippine archipelago has been hypothesized since the 1950s, with the reporting of presumably Pleistocene megafaunal remains and 'Palaeolithic' industries consisting of chopping tools and flakes (the 'Cabalwanian' and 'Liwanian' industries, respectively) from surface finds and excavations in the Cagayan Valley basin of northern Luzon 3,4. Despite the fact that these early discoveries took place more than 60 years ago, no direct association between megafauna and lithic industries has been documented since then, and no secure numerical dating of both fossil fauna and lithics has been available for this region 11. To date, the discovery of a human metatarsal in Callao Cave in northern Luzon 6 , directly dated to 66.7 ± 1.0 thousand years ago (ka), represented the oldest evidence of the peopling of the Philippines. International audience

We present a detailed investigation of the dynamical behavior of mimetic gravity with a general potential for the mimetic scalar field. Performing a phase-space and stability analysis, we show that the scenario at hand can successfully describe the thermal history of the universe, namely the successive sequence of radiation, matter, and dark-energy eras. Additionally, at late times the universe can either approach a de Sitter solution, or a scaling accelerated attractor where the dark-matter and dark-energy density parameters are of the same order, thus offering an alleviation of the cosmic coincidence problem. Applying our general analysis to various specific potential choices, including the power-law and the exponential ones, we show that mimetic gravity can be brought into good agreement with the observed behavior of the universe. Moreover, with an inverse square potential we find that mimetic gravity offers an appealing unified cosmological scenario where both dark energy and dark matter are characterized by a single scalar field, and where the cosmic coincidence problem is alleviated. Comment: 30 pages, 7 figures. Final version published in JCAP