Search results for " Network"

The movement of People in the upper Seine basin during the Roman period (1st century BCE – 5th century CE): infrastructures and written testimony.

2021

Archaeological and historical data to do with the movement of populations and goods in the Seine catchment area have not yet been overviewed for the Roman period. The Arkéaube conference offers an opportunity to present research on this subject. We can observe that, during the Roman period, the Seine valley was a major thoroughfare located downstream from the confluence of the Seine and the Yonne. Upstream, the Yonne gradually replaced the Petite Seine as a major route across the south-east of the Paris Basin.

La présence de l’Etat dans l’Est du diocèse des Gaules au IVe s. : au miroir des sources matérielles et écrites

2021

Der vorliegende Artikel schlägt eine Synthese der Präsenz des Staates in Ostgallien vor. Er beschränkt sich auf das 4. Jh. von der Tetrarchie bis in die theodosianische Zeit. Er stützt sich auf eine kritische und fachübergreifende Betrachtung der materiellen und schriftlichen Dokumentation, die insbesondere bemüht ist, die Daten in Form von Karten zu präsentieren.

Les agglomérations antiques du Val de Saône : émergence et mutations d’un réseau urbain de la fin de l’âge du Fer au début du Moyen Âge

2019

The aim of this thesis is to study the processes of emergence, structuring and mutation of an ancient urban network from the end of the Protohistory to the beginning of the Middle Ages in a micro-region located on the edge of the ancient éduens, lingons and séquanes territories, the Saône Valley. This area is characterized by a density of Gallo-Roman small towns with an amount and a high quality of data unequalled in Gaul, as a result of ancient and recent research. While these small towns were among the first studied in the 1980’s, their exploitation was limited to the study of hierarchies and urban functions during the High Empire, neglecting the chronology and the evolution of the urban …

The starry sky, a territorial commons?

2021

International audience; Flagstaff, Arizona, United States, April 15, 1958: the city council adopts the ordinance n°440 which aims at “preventing a rapid deterioration of the visibility of the starry sky”. This regulation results from the mobilization of the Lowell Observatory astronomers against certain public lighting devices. Through this political act, the elected officials place their city at the epicenter of an emergent international movement: the ‘Dark-sky movement’. The first replica of this movement is felt in 1972 in Tucson, Arizona. From a discomfort perceived by astronomers from the Lowell and Kitt Peak observatories, the idea of ‘light pollution’ emerges and begins to spread thr…

Women in Art and Literature Networks. Spinning Webs

2018

International audience

Accessibility in long run: demographic dynamic and speed acceleration in the French Railway Network between 1860 and 1930

2015

International audience

Consommation et modes de vies durable à Fontaine d'Ouche

2013

Improving IoT Communications Based on Smart Routing Algorithms

2018

International audience; Due to the recorded success by Internet of Things (IoT) technology, more and more domains use it as a communications and exchange network such as e-health, smart cities, vehicles, etc. IoT don’t stop integrating an important number of components and objects that are characterized by their complexity and heterogeneity. Such constraints make the existing routings protocols unsuitable for IoT communications. To accomplish all the expected tasks and satisfy the user services, it is important to guarantee a quality of communication that answers to the requirements of the various applications in terms of data and processing (availability, integrity, efficiency, etc.). The …

Performances of neural networks for deriving LAI estimates from existing CYCLOPES and MODIS products

2008

International audience; This paper evaluates the performances of a neural network approach to estimate LAI from CYCLOPES and MODIS nadir normalized reflectance and LAI products. A data base was generated from these products over the BELMANIP sites during the 2001-2003 period. Data were aggregated at 3 km x 3 km, resampled at 1/16 days temporal frequency and filtered to reject outliers. VEGETATION and MODIS reflectances show very consistent values in the red, near infrared and short wave infrared bands. Neural networks were trained over part of this data base for each of the 6 MODIS biome classes to retrieve both MODIS and CYCLOPES LAI products. Results show very good performances of neural …

Frequency Stability Measurement of Cryogenic Sapphire Oscillators with a Multichannel Tracking DDS and the Two-Sample Covariance

2018

This article shows the first measurement of three 100 MHz signals exhibiting fluctuations from 2E-16 to parts in 1E-15 for integration time tau between 1 s and 1 day. Such stable signals are provided by three Cryogenic Sapphire Oscillators (CSOs) operating at about 10 GHz, also delivering the 100 MHz output via a dedicated synthesizer. The measurement is made possible by a 6-channel Tracking DDS (TDDS) and the two-sample covariance tool, used to estimate the Allan variance. The use of two TDDS channels per CSO enables high rejection of the instrument background noise. The covariance outperforms the Three-Cornered Hat (TCH) method in that the background converges to zero "out of the box," wi…