17 research outputs found

    Ambient-noise tomography of the wider Vienna Basin region

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    We present a new 3-D shear-velocity model for the top 30 km of the crust in the wider Vienna Basin region based on surface waves extracted from ambient-noise cross-correlations. We use continuous seismic records of 63 broad-band stations of the AlpArray project to retrieve interstation Green’s functions from ambient-noise cross-correlations in the period range from 5 to 25 s. From these Green’s functions, we measure Rayleigh group traveltimes, utilizing all four components of the cross-correlation tensor, which are associated with Rayleigh waves (ZZ, RR, RZ and ZR), to exploit multiple measurements per station pair. A set of selection criteria is applied to ensure that we use high-quality recordings of fundamental Rayleigh modes. We regionalize the interstation group velocities in a 5 km × 5 km grid with an average path density of ∌20 paths per cell. From the resulting group-velocity maps, we extract local 1-D dispersion curves for each cell and invert all cells independently to retrieve the crustal shear-velocity structure of the study area. The resulting model provides a previously unachieved lateral resolution of seismic velocities in the region of ∌15 km. As major features, we image the Vienna Basin and Little Hungarian Plain as low-velocity anomalies, and the Bohemian Massif with high velocities. The edges of these features are marked with prominent velocity contrasts correlated with faults, such as the Alpine Front and Vienna Basin transfer fault system. The observed structures correlate well with surface geology, gravitational anomalies and the few known crystalline basement depths from boreholes. For depths larger than those reached by boreholes, the new model allows new insight into the complex structure of the Vienna Basin and surrounding areas, including deep low-velocity zones, which we image with previously unachieved detail. This model may be used in the future to interpret the deeper structures and tectonic evolution of the wider Vienna Basin region, evaluate natural resources, model wave propagation and improve earthquake locations, among others

    Arrival angles of teleseismic fundamental mode Rayleigh waves across the AlpArray

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    The dense AlpArray network allows studying seismic wave propagation with high spatial resolution. Here we introduce an array approach to measure arrival angles of teleseismic Rayleigh waves. The approach combines the advantages of phase correlation as in the two-station method with array beamforming to obtain the phase-velocity vector. 20 earthquakes from the first two years of the AlpArray project are selected, and spatial patterns of arrival-angle deviations across the AlpArray are shown in maps, depending on period and earthquake location. The cause of these intriguing spatial patterns is discussed. A simple wave-propagation modelling example using an isolated anomaly and a Gaussian beam solution suggests that much of the complexity can be explained as a result of wave interference after passing a structural anomaly along the wave paths. This indicates that arrival-angle information constitutes useful additional information on the Earth structure, beyond what is currently used in inversions

    Octogenarians with EGFR-mutated non-small cell lung cancer treated by tyrosine-kinase inhibitor a multicentric real-world study assessing tolerance and efficacy (OCTOMUT study)

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    International audienceObjective. To assess efficacy and tolerance of EGFR tyrosine-kinase inhibitors (TKIs) for advanced EGFR-mutated non-small cell lung cancer (NSCLC) in octogenarians.Patients and methods. Patients aged 80 years or older with EGFR-mutated NSCLC treated by EGFR TKI between January 2011 and March 2015 whatever the line of treatment were retrospectively selected.Results. 20 centers retrospectively included 114 patients (women, 77.2%; Caucasians, 98.3%; mean age, 83.9 years). A performance status of 0–1 or 2–3 at diagnosis was reported for 71.6% and 28.4% of patients, respectively. Overall, 95.6% of patients had adenocarcinomas and histological stage at diagnosis was stage IV for 79.8% of patients. EGFR mutations were identified mainly on exon 19 (46.5%) and exon 21 (40.4%). A geriatric assessment was performed in 35.1% of patients. TKI treatment was administered to 97.3% of patients as first or second line of treatment. Overall response rate and disease control rate were 63.3% (69/109) and 78.9% (86/109), respectively. Median progression-free survival was 11.9 months (95% confidence interval [CI], 8.6–14.7) and median overall survival was 20.9 months (95% CI, 14.3–27.1). After progression, 36/95 (37.9%) patients received a new line of chemotherapy. Main toxicities were cutaneous for 66.7% of patients (grade 3–4, 10%), diarrhea for 56.0% (grade 3–4, 15%; grade 5, 2%) and others for 25.7% (grade 3–4, 41%).Conclusions. Octogenarians with EGFR-mutated NSCLC treated by EGFR TKI had clinical outcomes and toxicity profile comparable to younger patients. Geriatric assessment appeared to be underused in this population

    Rapport de conjoncture 2024 - Section 18 du CoNRS (mandat 2021-2025): Questions clés et défis en Sciences de la Terre et des planÚtes

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    Ce rapport s'adresse Ă  un large public allant des chercheurs et ingĂ©nieurs dans nos disciplines et d'autres domaines, aux Ă©tudiants et aux dĂ©cideurs. Il vise Ă  donner un panorama Ă  jour des recherches en Sciences de la Terre et des outils structurant notre communautĂ©. Il se base sur l'analyse d'environ un millier de dossiers (concours, promotions, Ă©valuations individuelles et de laboratoires) et d'auditions Ă©manant des chercheurs et des candidats de la section 18, ainsi que des propositions de mĂ©dailles et d’accueil en dĂ©lĂ©gation CNRS. A partir d’une sĂ©lection d'illustrations schĂ©matisant des exemples reprĂ©sentatifs de changements de paradigme, sont prĂ©sentĂ©es quelques avancĂ©es rĂ©alisĂ©es ces dix derniĂšres annĂ©es et les dĂ©fis scientifiques et mĂ©thodologiques, sans pouvoir ĂȘtre totalement exhaustifs

    Rapport de conjoncture 2024 - Section 18 du CoNRS (mandat 2021-2025): Questions clés et défis en Sciences de la Terre et des planÚtes

    No full text
    Ce rapport s'adresse Ă  un large public allant des chercheurs et ingĂ©nieurs dans nos disciplines et d'autres domaines, aux Ă©tudiants et aux dĂ©cideurs. Il vise Ă  donner un panorama Ă  jour des recherches en Sciences de la Terre et des outils structurant notre communautĂ©. Il se base sur l'analyse d'environ un millier de dossiers (concours, promotions, Ă©valuations individuelles et de laboratoires) et d'auditions Ă©manant des chercheurs et des candidats de la section 18, ainsi que des propositions de mĂ©dailles et d’accueil en dĂ©lĂ©gation CNRS. A partir d’une sĂ©lection d'illustrations schĂ©matisant des exemples reprĂ©sentatifs de changements de paradigme, sont prĂ©sentĂ©es quelques avancĂ©es rĂ©alisĂ©es ces dix derniĂšres annĂ©es et les dĂ©fis scientifiques et mĂ©thodologiques, sans pouvoir ĂȘtre totalement exhaustifs

    Rapport de conjoncture 2024 - Section 18 du CoNRS (mandat 2021-2025): Questions clés et défis en Sciences de la Terre et des planÚtes

    No full text
    Ce rapport s'adresse Ă  un large public allant des chercheurs et ingĂ©nieurs dans nos disciplines et d'autres domaines, aux Ă©tudiants et aux dĂ©cideurs. Il vise Ă  donner un panorama Ă  jour des recherches en Sciences de la Terre et des outils structurant notre communautĂ©. Il se base sur l'analyse d'environ un millier de dossiers (concours, promotions, Ă©valuations individuelles et de laboratoires) et d'auditions Ă©manant des chercheurs et des candidats de la section 18, ainsi que des propositions de mĂ©dailles et d’accueil en dĂ©lĂ©gation CNRS. A partir d’une sĂ©lection d'illustrations schĂ©matisant des exemples reprĂ©sentatifs de changements de paradigme, sont prĂ©sentĂ©es quelques avancĂ©es rĂ©alisĂ©es ces dix derniĂšres annĂ©es et les dĂ©fis scientifiques et mĂ©thodologiques, sans pouvoir ĂȘtre totalement exhaustifs

    Rapport de conjoncture 2024 - Section 18 du CoNRS (mandat 2021-2025): Questions clés et défis en Sciences de la Terre et des planÚtes

    No full text
    Ce rapport s'adresse Ă  un large public allant des chercheurs et ingĂ©nieurs dans nos disciplines et d'autres domaines, aux Ă©tudiants et aux dĂ©cideurs. Il vise Ă  donner un panorama Ă  jour des recherches en Sciences de la Terre et des outils structurant notre communautĂ©. Il se base sur l'analyse d'environ un millier de dossiers (concours, promotions, Ă©valuations individuelles et de laboratoires) et d'auditions Ă©manant des chercheurs et des candidats de la section 18, ainsi que des propositions de mĂ©dailles et d’accueil en dĂ©lĂ©gation CNRS. A partir d’une sĂ©lection d'illustrations schĂ©matisant des exemples reprĂ©sentatifs de changements de paradigme, sont prĂ©sentĂ©es quelques avancĂ©es rĂ©alisĂ©es ces dix derniĂšres annĂ©es et les dĂ©fis scientifiques et mĂ©thodologiques, sans pouvoir ĂȘtre totalement exhaustifs

    Rapport de conjoncture 2024 - Section 18 du CoNRS (mandat 2021-2025): Questions clés et défis en Sciences de la Terre et des planÚtes

    No full text
    Ce rapport s'adresse Ă  un large public allant des chercheurs et ingĂ©nieurs dans nos disciplines et d'autres domaines, aux Ă©tudiants et aux dĂ©cideurs. Il vise Ă  donner un panorama Ă  jour des recherches en Sciences de la Terre et des outils structurant notre communautĂ©. Il se base sur l'analyse d'environ un millier de dossiers (concours, promotions, Ă©valuations individuelles et de laboratoires) et d'auditions Ă©manant des chercheurs et des candidats de la section 18, ainsi que des propositions de mĂ©dailles et d’accueil en dĂ©lĂ©gation CNRS. A partir d’une sĂ©lection d'illustrations schĂ©matisant des exemples reprĂ©sentatifs de changements de paradigme, sont prĂ©sentĂ©es quelques avancĂ©es rĂ©alisĂ©es ces dix derniĂšres annĂ©es et les dĂ©fis scientifiques et mĂ©thodologiques, sans pouvoir ĂȘtre totalement exhaustifs
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