Search results for "technical"
showing 10 items of 955 documents
Thermo-mechanical volume change behaviour of Opalinus Clay
2016
The paper examines the thermo-mechanical volume change behaviour of Opalinus Clay in relation to different stress conditions and overconsolidation ratio (OCR) values and evaluates the impact of temperature on some hydro-mechanical properties of this material. To this aim, a focused experimental campaign consisting in high-temperature/high-pressure oedometric tests has been carried out. The results show that the thermo-mechanical volume change behaviour of Opalinus Clay is heavily affected by the OCR: thermal expansion is found when the heating is carried out at high OCR, whereas irreversible thermal compaction is observed when heat is applied at a vertical effective stress that is sufficien…
Source shape and data analysis procedure effects on hydraulic conductivity of a sandy-loam soil determined by ponding infiltration runs
2017
Performing ponding infiltration runs with non-circular sources could represent a good means to sample completely an area of interest. Regardless of the shape of the source, predicting the expected reliability of the collected data by infiltrometers should facilitate soil hydraulic characterisation and also allow a more conscious use of the field data. The influence of the shape of the infiltration source (i.e., circular or square) and the analysis procedure of the steady-state infiltration data on the saturated hydraulic conductivity, Ks, of a sandy-loam soil was tested in this investigation. Circular and square surfaces sampled with the pressure infiltrometer (PI) yielded similar estimates…
Une approche structurelle pour la reconnaissance de notices bibliographiques
1995
National audience; Cet article présente un système de reconnaissance de la structure logique de notices bibliographiques en vue de la conversion rétrospective de catalogues de bibliothèques. Le système est guidé par un modèle de structures de la classe des notices, construit sur la base de spécifications détaillées par la bibliothèque. Le modèle fait intervenir aussi bien des connaissances sur la macro-structure des notices que sur la micro-structure de leur contenu. La reconnaissance de la structure d'une notice consiste à retrouver, à partir d'un flux OCR (Optical Character Recognition), sa structure logique spécifique, conformément aux descriptions du modèle. Le résultat est un flux stru…
In Situ, Airborne Instrumentation: Addressing and Solving Measurement Problems in Ice Clouds
2012
The workshop on in situ airborne instrumentation: addressing and solving measurement problems in ice clouds, June 25-27, 2010, Oregon, aimed to identify unresolved questions concerning ice formation and evolution in ice clouds, assess the current state of instrumentation that can address these problems, introduce emerging technology that may overcome current measurement issues, and recommend future courses of action to improve our understanding of ice cloud microphysical. Eleven presentations were made covering measurement challenges associated measuring the composition and concentration of all the modes of ice nuclei (IN), measuring the morphology, mass, surface, and optical properties of …
Entanglements, transmission processes and social identities. The technical traditions of ceramics in the Three-Lakes region and its margins (3600-300…
2019
In Western Europe, the second half of the 4th millennium is a turning point. On the Swiss Plateau, this phase is characterized by the end of Middle Neolithic cultures (Cortaillod and Pfyn) around 3550 BCE, and the emergence of Horgen after 3250 BCE. The transition between these two phases is now better documented thanks to Port-Conty type and Pfyn/Horgen settlements dated around 3400 BCE. This work aims to identify the cultural substract at the origin of the Horgen by characterizing the technical identities and entanglements at the end of the 4th millennium, then by identifying over time the transmission or abandonment of certain ways of making pots in order to determine the share of local …
-3400 autour du lac de Bienne
2015
La question du substrat culturel à l’origine du Néolithique récent reste, pour la Suisse occidentale, toujours ouverte. Ces changements viennent-ils plutôt du fond Cortaillod (de type Port-Conty) local, ou bien de la culture de Pfyn, présente en Suisse orientale. De plus, est-il possible de mettre en évidence des phénomènes de diffusion de l’émergence du Néolithique récent vers l’Ouest, en comparant notamment avec le Horgen du Jura français, ou le Néolithique récent du Bassin parisien.Ce poster présente les résultats préliminaires d'un mémoire de recherche de Master 2. Il concerne l'étude technologique des poteries issues de trois sites voisins et contemporains : Sutz-Lattrigen Riedstation,…
Ceramic technical traditions in the second part of the IVth millennium. The settlement of Twann " Bahnhof " (Bern Canton, Switzerland).
2018
International audience; The neolithic settlement of Twann " Bahnhof " has been excavated during the 1970's. It presents successive sets covering nearly all the second part of the IVth millennium. The ceramic set has been published (Die neolitischen Ufersiedlungen von Twann, 20 volumes, between 1977 and 1981). This dwelling is a reference for the lacustrine research. However, far too little attention has been paid to the technological aspects of ceramics. This communication suggests to reexamine many potteries of the site from late Cortaillod to recent western Horgen, in order to study pottery manufacturing and to reconstitute the " chaînes opératoires ". This case study will allow us to abo…
La tombe princière de Lavau et le concept d’un artisanat de cour
2018
The idea of crafts specifically linked to a high status court, with outstanding artisans who gravitated around a local prince took form during the study of objects from the Lavau tomb, the discovery of which has given scholars a rare glimpse of the riches contained within a high status tomb dating to the La Tène A1. These objects, from a tomb that is later than most tombs of this period, represent a standard Hallstattian funerary set but also include new La Tène objects. They highlight probable long distance relations involving the trade of luxury items of Mediterranean influence. These would have probably influenced or inspired local crafts people, who made objects in order to highlight th…
Entanglements, transmission processes and social identities : the technical traditions of ceramics in the Trois-Lacs region and its margins (3600-300…
2019
In Western Europe, the second half of the 4th millennium is a turning point. On the Swiss Plateau, this phase is characterized by the end of Middle Neolithic cultures (Cortaillod and Pfyn) around 3550 BCE, and the emergence of Horgen after 3250 BCE. The transition between these two phases is now better documented thanks to Port-Conty type and Pfyn/Horgen settlements dated around 3400 BCE. This work aims to identify the cultural substract at the origin of the Horgen by characterizing the technical identities and entanglements at the end of the 4th millennium, then by identifying over time the transmission or abandonment of certain ways of making pots in order to determine the share of local …
Action research strategies at the “third place”
2014
Published version of an article in the journal: International Journal of Action Research. Also available from the publisher at: http://dx.doi.org/10.1688/IJAR-2014-02-Johnsen This article discusses action research strategies in regional development. It argues that regional settings are complex, and conceptualises this as the “third place”. This complexity implies a democratic challenge. Furthermore, using regional leadership as a case, it argues that in order to approach this as action researchers, one needs to discuss the assumptions the research is based on. The article discusses two action research approaches: the socio-technical approach and the democratic dialogue approach, and argues …