WorldCat Identities

Jacob, Jérémy (1973-....).

Overview
Works: 19 works in 25 publications in 2 languages and 27 library holdings
Genres: Academic theses 
Roles: Author, Thesis advisor, Opponent, Publishing director, Contributor, Editor
Publication Timeline
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Most widely held works by Jérémy Jacob
Enregistrement des variations paléoenvironnementales depuis 20000 ans dans le Nord Est du Brésil (Lac Caço) par les triterpènes et autres marqueurs organiques by Jérémy Jacob( Book )

2 editions published in 2003 in French and held by 3 WorldCat member libraries worldwide

Cette étude avait pour objectif d'identifier, dans la matière organique (MO) archivée dans des sédiments lacustres, de nouveaux marqueurs des climats du passé. Le site d'étude choisi est le Lac Caço, au nord-est du Brésil. Ce lac présente l'intérêt d'être situé dans une zone climatiquement sensible, à l'actuelle entrée de la Zone de Convergence Inter Tropicale dans le continent. La caractérisation globale de la MO que renferme une carotte de 6m a montré que celle-ci provient essentiellement de végétaux supérieurs. Les différences d'état de préservation de cette MO indiquent des conditions climatiques contrastées depuis la fin du Dernier Maximum Glaciaire. De nouveaux marqueurs moléculaires spécifiques de végétaux supérieurs (onocérane, éthers méthyliques de triterpènes pentacycliques) ont été identifiés dans ces sédiments. Ces molécules témoignent des associations végétales qui ont peuplé le bassin versant et des conditions physico-chimiques qui prévalaient durant le dépôt du sédiment
On shared systems by J Jacob( Book )

3 editions published in 1987 in English and held by 3 WorldCat member libraries worldwide

Changements paléoenvironnementaux et paléoclimatiques enregistrés dans les faciès continentaux et lagunaires de la limite Paléocène-Eocène des bassins de Paris et de Dieppe-Hampshire : apports de l'étude de la matière organique by Sylvain Garel-Laurin( Book )

2 editions published between 2013 and 2015 in French and held by 2 WorldCat member libraries worldwide

La limite Paléocène-Eocène (P/E) est associée au Maximum Thermique de la limite Paléocène-Eocène (PETM), caractérisé par une excursion isotopique négative du carbone (CIE). En Europe du N-O, cet évènement est enregistré dans les sédiments continentaux et lagunaires sparnaciens. Cette thèse se consacre à l'étude de la matière organique (MO) de quatre coupes et forages sparnaciens des bassins de Paris et de Dieppe-Hampshire afin de déterminer les changements environnementaux et climatiques qui s'y sont produits à la limite P/E. L'isotopie du carbone de la MO totale et des n-alcanes a permis de préciser la position de la limite P/E dans les zones étudiées et de corréler les sites sparnaciens d'Europe du N-O. Les extensions stratigraphiques du PETM et de la CIE ont aussi été précisées, mais des analyses complémentaires sont nécessaires pour en positionner la limite supérieure. Les palynofaciès, les biomarqueurs moléculaires et l'isotopie de l'hydrogène ont révélé deux intervalles de changements environnementaux et climatiques régionaux : (i) le premier, au début du PETM, est marqué par la mise en place d'un climat aux saisons contrastées et des changements de végétation et de milieu de dépôt dont la nature diffère d'une zone à l'autre; (ii) le deuxième, coïncide avec des anomalies isotopiques du carbone et correspond à des changements climatiques et floristiques haute fréquence suivis par la mise en place d'un climat plus humide à forte saisonnalité. La comparaison de ces données avec celles de la bibliographie montre que les effets du PETM sont très variables entre deux parties du globe et qu'ils ne répondent pas à un schéma latitudinal clair
Q11 : au Centre des enjeux, Orléans, 13-15 février 2018 by Colloque international Q11 : au Centre des enjeux( Book )

1 edition published in 2019 in French and held by 2 WorldCat member libraries worldwide

Miliacin in palaeosols from an Early Iron Age in Ukraine reveal in situ cultivation of broomcorn millet by Giedre Motuzaite-Matuzeviciute( )

1 edition published in 2013 in English and held by 2 WorldCat member libraries worldwide

Conference report on the first meeting of French organic geochemists Tuesday 30th-Friday 31st August 2012 by Jérémy Jacob( )

1 edition published in 2013 in English and held by 2 WorldCat member libraries worldwide

Free fatty acids in Lake Aydat catchment soils (French Massif Central): sources, distributions and potential use as sediment biomarkers by Renata Zocatelli( )

1 edition published in 2012 in English and held by 2 WorldCat member libraries worldwide

A uniform presentation of confidentiality properties by Jeremy Jacob( )

1 edition published in 1991 in English and held by 1 WorldCat member library worldwide

Formal description and parallel implementation of the data encryption standard by Philip Venables( )

1 edition published in 1990 in English and held by 1 WorldCat member library worldwide

Reconstruction des températures continentales en Europe de l'Ouest à partir de l'étude des tétraéthers ramifiés dans les sédiments du lac de Saint-Front (Massif Central, France) by Céline Martin( )

1 edition published in 2018 in French and held by 1 WorldCat member library worldwide

This thesis aims to reconstruct the climate of the last 100,000 years in western Europe. The study of past climate allows to better understand the natural variability of climate on which human-induced global warming is superimposed today. Bacterial fossil molecules whose structure varies according to the environmental conditions were used in this study to reconstruct the paleoclimate from the sediments of lake St Front in the Massif Central. The indices derived from these molecules reveal the long-term climatic variability but also the rapid events of climate change as well as a strong anthropogenic action in superimposition of the regional climatic changes over the last 5000 years. This work shows the importance of understanding the tool used and the functioning of the natural system in which it is studied, essential prerequisites for obtaining a credible climate reconstruction
Au Centre des enjeux : Q11, Orléans, 13-15 février 2018( Book )

1 edition published in 2019 in French and held by 1 WorldCat member library worldwide

Evolution of pastoralism in Southern Greenland during the last two millennia reconstructed from bile acids and coprophilous fungal spores in lacustrine sediments( )

1 edition published in 2015 in English and held by 1 WorldCat member library worldwide

Abstract: To reconstruct the evolution of livestock in SW Greenland over the last two millennia, we measured the concentration of bile acids in a sedimentary sequence retrieved from Lake Igaliku. Deoxycholic acid (DOC) was the sole bile acid and was present throughout the sequence. The DOC flux correlated quantitatively with that of coprophilous fungal spores. Maximum DOC and coprophilous fungal spores flux was recorded during the two periods of human settlement and grazing activity in the region (i.e. the Norse settlement during the Middle Ages and the recent Danish agricultural phase since 1920). These flux values were consistent with the presence of recent livestock around the lake and are attested to by way of archeological data relating to the Norse period. In contrast, the DOC and coprophilous fungal spores background during pre-Norse times and the Little Ice Age (LIA), indicated the presence of wild herbivores. Lower DOC and coprophilous fungal spore flux values after the Norse abandonment, compared with pre-colonization conditions, could indicate that Norse activity in conjunction with climate change, altered the pristine wildlife. Therefore, these quantitative correlations between DOC flux and coprophilous fungal spores flux potentially suggest a quantitative relationship with the livestock grazing in the catchment. The comparison between sedimentary DOC and coprophilous fungal spores provides significant highlights on past pastoral dynamics over the last 2000 yr in SW Greenland
Miliacin in palaeosols from an Early Iron Age in Ukraine reveal in situ cultivation of broomcorn millet by Giedre Motuzaite-Matuzeviciute( )

1 edition published in 2016 in English and held by 1 WorldCat member library worldwide

Category theory and information flow applied to computer security by Colin O'Halloran( )

1 edition published in 1993 in English and held by 1 WorldCat member library worldwide

Temporal reasoning about robotics applications : refinement and temporal logic by Abdulrazaq Abba( )

1 edition published in 2020 in English and held by 1 WorldCat member library worldwide

Les substances naturelles en Méditerranée nord-occidentale (VIe-Ier millénaire BCE) : chimie et archéologie des matériaux exploités leurs propriétés adhésives et hydrophobes by Maxime Rageot( )

1 edition published in 2015 in French and held by 1 WorldCat member library worldwide

Natural substances and transformed organic products used for their adhesive and hydrophobic properties are rarely considered for the pre- and protohistorical periods in the North Western Mediterranean. These materials can however provide technological, economic, social and environmental information about ancient societies.A biomolecular approach was applied to answer questions related to the different types of natural substances exploited by ancient communities. Plant and animal products were identified as raw materials (resins, beeswax, fats or bitumen), or as processed (birch bar tar, pine tar, and mixtures).Experimental work allowed a better understanding of the chaîne opératoire required for the production of birch bark tar. Results showed that it is possible to distinguish between the different manufacturing processes based on molecular criteria.To investigate procurement strategies of plant raw materials, archaeobotanical data was integrated using a spatial approach.The analysis carried out has shown that Birch bark tar was found to be the major product utilised during the Neolithic, its method of production varying depending on the chrono-cultural area. This resource was also sometime transferred. Bitumen, on the other hand, was exploited only when locally available. A diversification of materials (beeswax and Pinaceae resins), suggesting different methods of procurement and processing, was mostly apparent for the Chassey culture, where there appears to be intensification in the use.During the Iron Age, pine tar is the major product in the Mediterranean area. Birch bark tar was only identified in Corsican protohistorical societies
Formal analysis of confidentiality conditions related to data leakage by Ibrahim Shiyam( )

1 edition published in 2016 in English and held by 1 WorldCat member library worldwide

Caractérisation moléculaire et isotopique de goudrons et résines archéologiques dérivés de conifères en contexte maritime by Lucile Bailly( )

1 edition published in 2015 in French and held by 1 WorldCat member library worldwide

Resins and tars of Pinaceae have been used in the past mainly in the maritime field (caulking, protection of the ropes) and for the waterproofing of jars and amphorae. This study was devoted to the development of new molecular and isotopic tools for the characterization of such materials found in archaeological context (discrimination between tar / resin, taxonomic and geographical origin, manufacturing methods). Based on the detailed molecular and isotopic investigation of diterpenic compounds, in particular, it appears that the use of tar prevails in this context over that of resin and that trees from the genus Pinus, which can be partially discriminated in terms of species, have been preferentially used. It could be shown that the caulking material and the tar protecting ropes result overall from a less intense heating process than the material used to waterproof containers. A distinction of the archaeological samples on the basis of their isotopic composition in D was proposed
Hydrogen isotopes as environmental recorders( )

in English and held by 0 WorldCat member libraries worldwide

 
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Alternative Names
Jérémy Jacob wetenschapper

Languages
English (16)

French (9)