Communes de Voujeaucourt et de Mathay

Le projet du diffuseur de Voujeaucourt-Mathay (Doubs), permettant le raccordement de la RN463, de l’A36 et de la RD438, a occasionné une opération de prospection-inventaire en avril 1997. Cette opération a été effectuée par l’association Sequani Novi sur les communes de Bavans, Berche, Mathay et Voujeaucourt. Cette prospection s’est déroulée à la fin de la période réputée favorable pour la prospection pédestre. Mais la végétation, qui avait quinze jours d’avance, a rendu les conditions d’obse..

Impact of early childhood caries and its treatment under general anesthesia on orofacial function and quality of life : a prospective comparative study

Early Childhood Caries (ECC) has become a major public health concern worldwide, mostly affecting children from disadvantaged families in increasingly severe forms. This condition has been frequently reported to alter children?s nutrition, growth and general development. It negatively impacts their quality of life, through painful episodes and severe eating difficulties. While this period is crucial for oral praxes development, the impact of dental state on oro-facial functions is poorly documented. This study evaluated the impact of ECC and its treatment under general anesthesia on oro-facial functions and quality of life in pre-school children. The dysfunction and quality of life scores from 25 children with ECC were evaluated before treatment (T0), one month (T1) and three months after treatment (T2), using the Nordic Orofacial Test-Screening (NOT-S) and the Early Childhood Oral Health Impact Scale (ECOHIS), respectively, in comparison with 16 caries-free children. The number and extent of inter-arch dental contacts were also observed. The pre-operative higher NOT-S score observed in children with ECC decreased to reach the control level at T2. The mastication item was the most affected in the ECC group throughout the study. Their mean ECOHIS score also significantly decreased post-operatively and differences remaining between both groups were no longer clinically relevant. In addition, in children with ECC, values of functional inter-arch surfaces tended to increase over the follow-up period. Oro-facial functions and quality of life, altered by ECC, could be restored through a conservative treatment approach. Relations between dental state, orofacial functions and particularly chewing, and nutrition should be investigated further

The late Holocene record of Lake Mareotis, Nile Delta, Egypt

Lake Maryut (northwestern Nile Delta, Egypt) was a key feature of Alexandria's hinterland and economy during Greco-Roman times. Its shores accommodated major economic centers, and the lake acted as a gateway between the Nile valley and the Mediterranean. It is suggested that lake-level changes, connections with the Nile and the sea, and possible high-energy events considerably shaped the human occupation history of the Maryut. To reconstruct Lake Maryut hydrology in historical times, we used faunal remains, geochemistry (Sr isotopic signature of ostracods) and geoarcheological indicators of relative lake-level changes. The data show both a rise in Nile inputs to the basin during the first millennia BCE and CE and a lake-level rise of ca. 1.5 m during the Roman period. A high-energy deposit, inferred from reworked radiocarbon dates, may explain an enigmatic sedimentary hiatus previously attested to in Maryut's chronostratigraphy

Pour une carte archéologiche et paléoenvironnementale de la Maréotide: le programme Geomar

pp. 32-4

Pour une carte archéologique et paléoenvironnementale de la Maréotide: le programme GEOMAR

International audienceGEOMAR est un programme financé par l'Agence Nationale de la Recherche (ANR) sur la période 2013-2016. Il comporte trois partenaires : ECOLAB (UMR 5245, Toulouse), Chrono-Environnement (UMR 6249, Besançon) et le Centre d’Études Alexandrines (CEAlex, USR 3134, Alexandrie). En collaboration avec le ministère des Antiquités égyptiennes, ce programme vise à l’établissement d’une carte archéologique et paléoenvironnementale de la Maréotide, la campagne alexandrine qui se développe autour du lac Mariout..

Alexandrie (actions du Centre d’études alexandrines)

En 2019, le Centre d’Études Alexandrines (CEAlex, USR 3134 Cnrs/Ifao) a continué les fouilles sur le site de Kôm Bahig et sur la villa agricole du site d’Akadémia, de même que ses prospections en Maréotide dans la région au sud du lac Mariout, et a mené des campagnes de fouilles sous-marines sur le site du Phare. Il a en outre procédé à un diagnostic archéologique dans l’enceinte du dépôt archéologique de Tabiyet Nahassin, en vue de la construction d’un mur de clôture (fig. 1). Il a poursuivi..

Alexandrie (actions du Centre d’études alexandrines, 2022)

Données scientifiques produites :https://www.cealex.org/ Introduction En 2022, le Centre d’études alexandrines (CNRS/Ifao, UAR 3134 CEAlex) a été à même de poursuivre ses fouilles sur le site de Kôm Bahig, de même que ses prospections en Maréotide dans la région au sud du lac Mariout. En revanche, en raison des retards dans l’accord de l’autorisation de travail par la sécurité nationale égyptienne, ni les fouilles sous-marines sur le site du Phare, ni la campagne d’étude sur la tombe 2 de la..

Search for gravitational-lensing signatures in the full third observing run of the LIGO-Virgo network

Gravitational lensing by massive objects along the line of sight to the source causes distortions of gravitational wave-signals; such distortions may reveal information about fundamental physics, cosmology and astrophysics. In this work, we have extended the search for lensing signatures to all binary black hole events from the third observing run of the LIGO--Virgo network. We search for repeated signals from strong lensing by 1) performing targeted searches for subthreshold signals, 2) calculating the degree of overlap amongst the intrinsic parameters and sky location of pairs of signals, 3) comparing the similarities of the spectrograms amongst pairs of signals, and 4) performing dual-signal Bayesian analysis that takes into account selection effects and astrophysical knowledge. We also search for distortions to the gravitational waveform caused by 1) frequency-independent phase shifts in strongly lensed images, and 2) frequency-dependent modulation of the amplitude and phase due to point masses. None of these searches yields significant evidence for lensing. Finally, we use the non-detection of gravitational-wave lensing to constrain the lensing rate based on the latest merger-rate estimates and the fraction of dark matter composed of compact objects

Search for eccentric black hole coalescences during the third observing run of LIGO and Virgo

Despite the growing number of confident binary black hole coalescences observed through gravitational waves so far, the astrophysical origin of these binaries remains uncertain. Orbital eccentricity is one of the clearest tracers of binary formation channels. Identifying binary eccentricity, however, remains challenging due to the limited availability of gravitational waveforms that include effects of eccentricity. Here, we present observational results for a waveform-independent search sensitive to eccentric black hole coalescences, covering the third observing run (O3) of the LIGO and Virgo detectors. We identified no new high-significance candidates beyond those that were already identified with searches focusing on quasi-circular binaries. We determine the sensitivity of our search to high-mass (total mass M>70 M⊙) binaries covering eccentricities up to 0.3 at 15 Hz orbital frequency, and use this to compare model predictions to search results. Assuming all detections are indeed quasi-circular, for our fiducial population model, we place an upper limit for the merger rate density of high-mass binaries with eccentricities 0<e≤0.3 at 0.33 Gpc−3 yr−1 at 90\% confidence level