Florange II

Identifiant de l'opération archéologique : F1357200100044 Date de l'opération : 2001 (SU) À la suite d'un diagnostic réalisé en mai 2001 sur l'emprise d'un projet de bâtiment à usage tertiaire, une fouille de sauvetage a porté sur une petite nécropole du Iers. de notre ère. Après un décapage de 1 400 m2, un ensemble de seize tombes à incinération concentrées sur 90 m2 a été mis en évidence. La répartition topographique des structures funéraires montre un développement en arc de cercle. Plusi..

Norroy-le-Veneur – Lotissement Les Quatre Saisons

Identifiant de l'opération archéologique : F1357200100102 Date de l'opération : 2001 (SU) Un projet de lotissement envisagé de chaque côté de la route qui mène du hameau de Bellevue à la ferme Sainte-Anne a amené la réalisation de fouilles archéologiques qui se sont déroulées tout au long du mois de mai 2001. Cette opération d'archéologie préventive a permis de déceler des traces d'occupation humaine datable de la Protohistoire (âge du Bronze final) et d'étudier les restes d'un bâtiment remon..

Florange II – ZAC Sainte-Agathe II, bâtiment d'accueil

Identifiant de l'opération archéologique : F1357200100044 Date de l'opération : 2001 (SU) À la suite d'un diagnostic réalisé en mai 2001 sur l'emprise d'un projet de bâtiment à usage tertiaire, une fouille de sauvetage a porté sur une petite nécropole du Iers. de notre ère. Après un décapage de 1 400 m2, un ensemble de seize tombes à incinération concentrées sur 90 m2 a été mis en évidence. La répartition topographique des structures funéraires montre un développement en arc de cercle. Plusi..

Limit laws for distorted return time processes for infinite measure preserving transformations

We consider conservative ergodic measure preserving transformations on infinite measure spaces and investigate the asymptotic behaviour of distorted return time processes with respect to sets satisfying a type of Darling-Kac condition. We identify two critical cases for which we prove uniform distribution laws. For this we introduce the notion of uniformly returning sets and discuss some of their properties.Comment: 18 pages, 2 figure

Alteration of the phenology of leaf senescence and fall in winter deciduous species by climate change: effects on nutrient proficiency

Leaf senescence in winter deciduous species signals the transition from the active to the dormant stage. The purpose of leaf senescence is the recovery of nutrients before the leaves fall. Photoperiod and temperature are the main cues controlling leaf senescence in winter deciduous species, with water stress imposing an additional influence. Photoperiod exerts a strict control on leaf senescence at latitudes where winters are severe and temperature gains importance in the regulation as winters become less severe. On average, climatic warming will delay and drought will advance leaf senescence, but at varying degrees depending on the species. Warming and drought thus have opposite effects on the phenology of leaf senescence, and the impact of climate change will therefore depend on the relative importance of each factor in specific regions. Warming is not expected to have a strong impact on nutrient proficiency although a slower speed of leaf senescence induced by warming could facilitate a more efficient nutrient resorption. Nutrient resorption is less efficient when the leaves senesce prematurely as a consequence of water stress. The overall effects of climate change on nutrient resorption will depend on the contrasting effects of warming and drought. Changes in nutrient resorption and proficiency will impact production in the following year, at least in early spring, because the construction of new foliage relies almost exclusively on nutrients resorbed from foliage during the preceding leaf fall. Changes in the phenology of leaf senescence will thus impact carbon uptake, but also ecosystem nutrient cycling, especially if the changes are consequence of water stress

Roman whetstone production in northern Gaul (Belgium and northern France)

This paper focuses on the latest research on the production of Roman whetstones in northern Gaul. To date, little has been written about this specialised industry. However, three workshops producing whetstones were discovered recently in the north of Gaul in Buizingen (Province of Flemish Brabant, Belgium), Nereth (Province of Liège, Belgium) and Le Châtelet-sur-Sormonne (Department of Ardennes, France). Production debris and rough-outs recovered at these sites allowed us to reconstruct the operational sequence of manufacture, from the choice of raw material to the finished product. Technological studies enabled us to determine the production stages and highlight the similarities and differences between the three study areas. Analyses of the materials reveal the use of fine-grained sedimentary and low-grade metamorphic rocks outcropping near the workshops. All these rocks are linked to the Caledonian inliers of Brabant-London, Stavelot-Venn, and Rocroi. The large amount of waste found at Le Châtelet-sur-Sormonne, far more than that recovered at Buizingen and Nereth, is indicative of the economic importance of this whetstone workshop. This importance is reflected in the fact that whetstones from Le Châtelet-sur-Sormonne are distributed over a large area throughout Belgium, France (Nord-Pas-de-Calais, Picardie and Champagne-Ardenne regions), Germany, and the Netherlands. This paper presents the waste and rough-outs from the three production sites. It also defines rock types and their origins and offers insights into whetstone manufacturing processes and techniques

Transition probabilities for general birth-death processes with applications in ecology, genetics, and evolution

A birth-death process is a continuous-time Markov chain that counts the number of particles in a system over time. In the general process with $n$ current particles, a new particle is born with instantaneous rate $\lambda_n$ and a particle dies with instantaneous rate $\mu_n$. Currently no robust and efficient method exists to evaluate the finite-time transition probabilities in a general birth-death process with arbitrary birth and death rates. In this paper, we first revisit the theory of continued fractions to obtain expressions for the Laplace transforms of these transition probabilities and make explicit an important derivation connecting transition probabilities and continued fractions. We then develop an efficient algorithm for computing these probabilities that analyzes the error associated with approximations in the method. We demonstrate that this error-controlled method agrees with known solutions and outperforms previous approaches to computing these probabilities. Finally, we apply our novel method to several important problems in ecology, evolution, and genetics