Search results for "work"

A continuous plug flow reactor for magnesium recovery from concentrated brine

2015

Magnesium is one of the eight most abundant elements on the world and the third most abun- dant in the sea, buc practically only two countries (Russia and China) control the world market for this compound. Product purity, Mg recovery, crystal morphology and granulometric distribution of precipitated particles were examined through careful laboratory analysis and results from different tests were compared, in order to identify the effect of allcaline species’ nature and concentration on precipitation phenomena.

Evaluation of saltwork ponds operation through brine characterization and geochemical modelling using PHREEQC code integrating the Pitzer correction

2021

Seawater represents a potential resource for the extraction of salts and raw materials [1]. About one-third of the global table-salt production is manufactured in solar saltworks [2], being the most representative product of seawater processing. However, other valuable compounds such as Magnesium, Lithium and trace elements belonging to the alkaline/alkaline-earth metals (e.g. Rb, Cs, Sr) and transition/post-transition metals (e.g. Co, Ga, Ge) are present. Many of these elements are included in the EU Critical Raw Materials (CRM) list, grouping natural assets classified as fundamental for the wealth of the socio-economic structure of Europe [3]. In saltworks, natural evaporation of seawater…

Personalized multimedia touristic services for hybrid broadcast/broadband mobile receivers

2010

This paper presents the topology of a multimedia tourism service that targets mobile devices equipped with broadband and either multicast or broadcast access capabilities. Multicast / Broadcast access is used to handle the delivery of multimedia data to many simultaneous users in the service area. The solution adopted is based on existing standards for mobile TV services, but introducing features that enable the provision of generic multimedia services on top of mobile hybrid broadband and broadcast networks. Furthermore, this paper shows how to use standardized interfaces originally defined for interactive mobile TV broadcasting to build personalized mobile multimedia services that do not …

Were Bronze Age metalworkers skilled?: Perspectives from the study of the making of Bronze Age swords

2019

International audience; Beyond the provocation of the title, the question of ancient metalworkers’ skills, that has been recently discussed by Maikel Kuijpers for Bronze Age axes, makes perfect sense concerning Bronze Age swords, especially when equipped with a metallic hilt. These weapons are indeed almost always described as masterpieces of metalwork made by skilled and specialized craftsmen. This does not take into account the breakthroughs made since the 1960s in the study of the fabrication techniques of bronze artefacts. Even if it is true that most Bronze Age swords are looking flawless on the surface, imaging techniques such as X-ray or CT-scan enable archaeologists to have a glimps…

Le phénomène des épées, une vision européenne

2022

Mais où sont passées les épées à poignée métallique de l'âge du Bronze du Benelux ?

2019

International audience

Detecting faulty wireless sensor nodes through Stochastic classification

2011

In many distributed systems, the possibility to adapt the behavior of the involved resources in response to unforeseen failures is an important requirement in order to significantly reduce the costs of management. Autonomous detection of faulty entities, however, is often a challenging task, especially when no direct human intervention is possible, as is the case for many scenarios involving Wireless Sensor Networks (WSNs), which usually operate in inaccessible and hostile environments. This paper presents an unsupervised approach for identifying faulty sensor nodes within a WSN. The proposed algorithm uses a probabilistic approach based on Markov Random Fields, requiring exclusively an ana…

Fast dendrogram-based OTU clustering using sequence embedding

2014

Biodiversity assessment is an important step in a metagenomic processing pipeline. The biodiversity of a microbial metagenome is often estimated by grouping its 16S rRNA reads into operational taxonomic units or OTUs. These metagenomic datasets are typically large and hence require effective yet accurate computational methods for processing.In this paper, we introduce a new hierarchical clustering method called CRiSPy-Embed which aims to produce high-quality clustering results at a low computational cost. We tackle two computational issues of the current OTU hierarchical clustering approach: (1) the compute-intensive sequence alignment operation for building the distance matrix and (2) the …

Polska Zjednoczona Partia Robotnicza w Brudzeniu Dużym w latach 1972-1986

2016

In this text, the author presents the functioning of the Commune Committee of the Polish United Workers’ Party in Brudzeń Duży, a commune lying near Płock, in the years 1972—1986. It is mainly the minutes of meetings of the commune party authorities, which were analyzed, paying special attention to their reaction towards the challenge of daily life in the period before — during - and after the political breakthrough in 1981. On the basis of the analysis of the source materials, heavy ideologization of thinking of the management staff of the Municipal Committee was found and in conseąuence — incapacity to respond to social expectations. Hence, it led to a collapse of the influence of the Pol…

A unique microstructure of the fiber networks deposited from foam-fiber suspensions

2015

Abstract Fiber networks can be formed using aqueous foam as the suspending medium. The mean bubble size of the foam affects the resulting pore-size distribution of the fiber network. The foam–fiber interactions cause in particular an increase in the proportion of large micropores of the network, in comparison with the fiber networks that result from traditional water forming at a similar material density. Experiments were carried out for two different types of cellulose fiber, and characterization of the resulting pore structure was based on X-ray microtomography of the resulting fiber networks. The unique pore structure obtained with foam forming was reflected in various macroscopic proper…