Tesis sobre el tema "Trajet du matin"
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Nicot, Jean-Philippe. "Inverse modeling of subsurface environmental partitioning tracer tests /". Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.
Texto completoFish, Tamara Lynn. "Feminist traces : women and feminism in college composition and communication, 1963-1992 /". Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.
Texto completoLe, Pemp Gaël. "Capacité de poursuite des algorithmes adaptatifs dans un canal de transmission sous-marin à trajets multiples". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq25651.pdf.
Texto completoLebbin, Paul A. "Experimental and numerical analysis of air, tracer gas, and particulate movement in a large Eddy simulation chamber /". Search for this dissertation online, 2006. http://www.lib.umi.com/cr/ksu/main.
Texto completoCortina, Mélanie. "Fostering synergy between public transportation and autonomous mobility on demand : the prospects of regulation". Electronic Thesis or Diss., Vaulx-en-Velin, École nationale des travaux publics de l’État, 2023. http://www.theses.fr/2023ENTP0010.
Texto completoWith its ability to overcome common limitations of shared mobility, such as supply-demand imbalances, stochasticity in supply, and unaffordable rides, Autonomous Mobility on Demand (AMoD) could help face today's environmental challenges. But to prevent a too-high induced demand and increase the vehicle kilometers traveled, integrating AMoD and Public Transportation (PT) is required. However, the cooperation of AMoD and PT is not ensured, as shown by Uber's example. The main issue addressed in this thesis is how to regulate AMoD to foster cooperation with PT and achieve the benefits of intermodal AMoD. This question is tackled in two study cases: a transportation corridor and a large urban area. The work has three main objectives. First, it accounts for the benefits of a multimodal system based on the cooperation between PT and AMoD regarding efficiency, sustainability, and equity. Second, it aims at understanding the circumstances of cooperation/competition between PT and AMoD. The idea is to identify under which conditions AMoD cooperates or competes with PT and describe the associated mobility patterns. Third, we propose optimized means to realize the benefits of intermodal AMoD. It consists in optimizing the regulation strategies chosen for both case studies. In the corridor, we optimize the joint PT design and AMoD service disaggregation into fleets operating on geofenced coverage zones for the corridor. In the large city, we explore several pricing schemes affecting both travelers and autonomous vehicles
DAOMING, GUAN. "Elements traces dissous en milieu fluviatile, estuarien et marin : distribution, speciation et comportement". Paris 6, 1991. http://www.theses.fr/1991PA066684.
Texto completoBlain, Stéphane. "Application de polyamines immobilisées à la préconcentration de traces métalliques en milieu marin". Brest, 1992. http://www.theses.fr/1992BRES2020.
Texto completoDeeds, Neil Edward. "Development and evaluation of partitioning interwell tracer test technology for detection of non-aqueous phase liquids in fractured media /". Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.
Texto completoByrén, Lars. "Deposit-feeding in benthic macrofauna : Tracer studies from the Baltic Sea". Doctoral thesis, Stockholm University, Department of Systems Ecology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-62.
Texto completoA low content of organic matter, which is largely refractory in nature, is characteristic of most sediments, meaning that aquatic deposit-feeders live on a very poor food source. The food is derived mainly from sedimenting phytodetritus, and in temperate waters like the Baltic Sea, from seasonal phytoplankton blooms. Deposit-feeders are either bulk-feeders, or selective feeders, which preferentially ingest the more organic-rich particles in the sediment, including phytodetritus, microbes and meiofauna.
The soft-bottom benthos of the Baltic Sea has low species biodiversity and is dominated by a few macrobenthic species, among which the most numerous are the two deposit-feeding amphipods Monoporeia affinis and Pontoporeia femorata, and the bivalve Macoma balthica. This thesis is based on laboratory experiments on the feeding of these three species, and on the priapulid Halicryptus spinulosus.
Feeding by benthic animals is often difficult to observe, but can be effectively studied by the use of tracers. Here we used the radioactive isotope 14C to label food items and to trace the organic matter uptake in the animals, while the stable isotopes 13C and 15N were used to follow feeding on aged organic matter in the sediment.
The abundance of M. balthica and the amphipods tends to be negatively correlated, i.e., fewer bivalves are found at sites with dense populations of amphipods, with the known explanation that newly settled M. balthica spat are killed by the amphipods. Whether the postlarvae are just accidentally killed, or also ingested after being killed was tested by labelling the postlarvae with 14C and Rhodamine B. Both tracer techniques gave similar evidence for predation on and ingestion of postlarval bivalves. We calculated that this predation was likely to supply less than one percent of the daily carbon requirement for M. affinis, but might nevertheless be an important factor limiting recruitment of M. balthica.
The two amphipods M. affinis and P. femorata are partly vertically segregated in the sediment, but whether they also feed at different depths was unknown. By adding fresh 14C-labelled algae either on the sediment surface or mixed into the sediment, we were able to distinguish surface from subsurface feeding. We found M. affinis and P. femorata to be surface and subsurface deposit-feeders, respectively.
Whether the amphipods also feed on old organic matter, was studied by adding fresh 14C-labelled algae on the sediment surface, and using aged, one-year-old 13C- and 15N-labelled sediment as deep sediment. Ingestion of old organic matter, traced by the stable isotopes, differed between the two species, with a higher uptake for P. femorata, suggesting that P. femorata utilises the older, deeper-buried organic matter to a greater extent.
Feeding studies with juveniles of both M. affinis and P. femorata had not been done previously. In an experiment with the same procedure and treatments as for the adults, juveniles of both amphipod species were found to have similar feeding strategies. They fed on both fresh and old sediment, with no partitioning of food resources, making them likely to be competitors for the same food resource.
Oxygen deficiency has become more wide-spread in the Baltic Sea proper in the last half-century, and upwards of 70 000km2 are now devoid of macrofauna, even though part of that area does not have oxygen concentrations low enough to directly kill the macrofauna. We made week-long experiments on the rate of feeding on 14C-labelled diatoms spread on the sediment surface in different oxygen concentrations for both the amphipod species, M. balthica and H. spinulosus. The amphipods were the most sensitive to oxygen deficiency and showed reduced feeding and lower survival at low oxygen concentrations. M. balthica showed reduced feeding at the lowest oxygen concentration, but no mortality increase. The survival of H. spinulosus was unaffected, but it did not feed, showing that it is not a surface deposit-feeder. We conclude that low oxygen concentrations that are not directly lethal, but reduce food intake, may lead to starvation and death in the longer term.
Hénaff, Françoise. "Réception optimale en présence de trajets multiples et d'effet doppler : Application aux transmissions sur canal acoustique sous-marin". Brest, 1993. http://www.theses.fr/1993BRES2017.
Texto completoGhaleb, Joey Raymond. "The European-Mediterranean Free Trade Agreement with Lebanon : tariffs, taxes and welfare /". Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.
Texto completoRosner, Martin Siegfried [Verfasser]. "Boron as a tracer for material transfer in subduction zones / verf. von Martin Siegfried Rosner". Potsdam : Geoforschungszentrum, 2004. http://d-nb.info/973383356/34.
Texto completoKellison, James Bruce. "Siberian crude : the political economy of the Russian oil sector, 1970-1998 /". Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.
Texto completoMcGhee, Fred Lee. "The Black crop : slavery and slave trading in nineteenth century Texas /". Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.
Texto completoGoebel, Norbert [Verfasser], Martin [Gutachter] Mauve y Kalman [Gutachter] Graffi. "Inter-Vehicular Communication Simulation based on Cellular Network Traces / Norbert Goebel ; Gutachter: Martin Mauve, Kalman Graffi". Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2018. http://d-nb.info/1153196719/34.
Texto completoHannah, David Ramsay. "An investigation of the effects of trade secret protection procedures and psychological contract violations on employees' tendencies to divulge trade secrets /". Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.
Texto completoFlament, Pascal. "Les métaux-traces associés aux aérosols atmosphériques : apports au milieu marin du littoral Nord-Pas-de-Calais". Lille 1, 1985. http://www.theses.fr/1985LIL10066.
Texto completoKnox, Lynda Marie. "The ecology of resilience in the inner-city : redefining resilience in the lives of high-risk inner-city youth /". Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.
Texto completoTrabert, Johannes [Verfasser], Martin [Akademischer Betreuer] Unverdorben y Thomas J. [Akademischer Betreuer] Vogl. "Biokompatibilität von koronaren Zinkstents mit verschiedenen Beschichtungen in den Iliakalgefäßen von weißen Neuseeland-Kaninchen / vorgelegt von Johannes Philipp Trabert / Johannes Trabert. Gutachter: Martin Unverdorben ; Thomas J. Vogl". Frankfurt am Main : Univ.-Bibliothek Frankfurt am Main, 2012. http://d-nb.info/104441281X/34.
Texto completoMisra, Rajul. "Toward a comprehensive representation and analysis framework for non-worker activity-travel pattern modeling /". Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.
Texto completoBosworth, Stephen David. "A true state of crisis : coal workers, the state, and the politics of energy in Chile, 1902-1938 /". Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.
Texto completoBaldoceda, Baldeon Luis Manuel. "Offrir une nouvelle bande d'herbe après la traite du matin ou après la traite du soir : effets sur la valeur nutritive du pâturage et sur les performances des vaches laitières en production bio". Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/28266/28266.pdf.
Texto completoMaier, Friedrich [Verfasser], Tobias [Akademischer Betreuer] Licha y Martin [Akademischer Betreuer] Sauter. "Improved tracer techniques for georeservoir applications : Artificial tracer examination identifying experimentally relevant properties and potential metrics for the joint application of hydrolysis tracer and heat injection experiments / Friedrich Maier. Gutachter: Tobias Licha ; Martin Sauter. Betreuer: Tobias Licha". Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2015. http://d-nb.info/1065882483/34.
Texto completoLee, Sangmin. "From visible to invisible trade barriers : a comparative study of the automobile industry in Japan and Korea /". Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.
Texto completoKarmakar, Shyamal [Verfasser], Martin [Akademischer Betreuer] [Gutachter] Sauter, Iulia [Gutachter] Ghergut y Gunter [Gutachter] Buntebarth. "Single-well tracer push-pull method development for subsurface process characterization : Early-time tracer injection-flowback test for stimulated fracture characterization, numerical simulation uses and efficiency for flow and solute transport / Shyamal Karmakar ; Gutachter: Martin Sauter, Iulia Ghergut, Gunter Buntebarth ; Betreuer: Martin Sauter". Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2016. http://d-nb.info/1121302815/34.
Texto completoHoonsawat, Ratidanai. "Three essays in international trade and development". Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available, full text:, 2008. http://wwwlib.umi.com/cr/syr/main.
Texto completoSunaoshi, Yukako. "Collaboration on reaching understanding : interactions and negotiations in Japanese manufacturing plants in the US /". Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.
Texto completoBasista, Filip. "Jeřábová kočka 130/50 t". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228290.
Texto completoOrani, Anna Maria. "Développements analytiques pour la détermination des concentrations et de l’origine des contaminants inorganiques dans des environnements marins". Thesis, Université Côte d'Azur (ComUE), 2017. http://www.theses.fr/2017AZUR4112/document.
Texto completoTrace elements (TE) naturally occur in the environment but their inputs have been increasing by anthropogenic activities in the last decades, causing environmental concerns, particularly in coastal ecosystems. TE are toxic and the need of reliable methods for their determination in environmental samples is undeniable. The first part of this PhD was focused on the development and full validation of methods for the analysis of TE in sediments and marine organisms by Solid Sampling High Resolution Continuum Source Atomic Absorption Spectrometry (SSHR-CS-AAS). Second, environmental studies based on these and others methodologies were then performed. A first monitoring survey was performed on sediments (surface and core samples) collected along the Namibian coast. This thesis provides the first baseline of TE contents and historical record of pollution in the area. Significant Pb, Cu, Cd and Zn enrichments were highlighted around the most populated areas, providing a needed baseline for present and future evaluation of the Namibian marine environment. Pb pollutions and their sources were also tracked through the use of Pb isotope ratios. A second monitoring survey was performed on different marine sponges and sediments collected in the French Mediterranean and in the Irish coasts. This work showed that sponges accumulate more TE than sediments in different extents according to species. Arsenic speciation analysis was performed in sponges by High Performance Liquid Chromatography (HPLC) coupled with ICP-MS. This special focus on arsenic highlighted the great bioaccumulation of this metalloid in sponges and its biotransformation from inorganic forms to less toxic organic forms
Roméo, Michèle. "Contribution à la connaissance des métaux traces (Cd, Cu, Hg, Pb, Zn) dans l'écosystème marin au niveau du plancton : approches analytiques et expérimentales". Nice, 1985. http://www.theses.fr/1985NICE4050.
Texto completoEl-Sayad, E. A. H. "Status of some trace elements in relation to the nature of the main sediments in the Fayoum (Egypt) depression". Thesis, University of Aberdeen, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384486.
Texto completoTaneez, Mehwish. "Stabilisation d’un sédiment marin pollué en utilisant des résidus de bauxite : évaluation de la mobilité d’éléments trace". Thesis, Nice, 2016. http://www.theses.fr/2016NICE4036/document.
Texto completoMarine sediments concentrate various pollutants and subsequent sedimentation of harbors and ports require periodic dredging to maintain satisfactory depth of waterways. Direct land deposition of contaminated marine dredged sediments pose risk to the environment due to possible leaching of trace elements. In this context, we aimed to study the feasibility of trace elements stabilization by mixing 5% and 20% of bauxite residues (bauxaline®, bauxsol and neutralized bauxaline®) with composted dredged marine sediment. The treatment efficiency was evaluated by monitoring the leached trace elements concentration and toxicity of sediment leachates. 20% amendment application successfully stabilized cationic pollutants (Cu, Cd, Zn) up to 40-80%, and decreased the toxicity of sediment leachates. Whereas, anionic pollutants (As, Mo) were less immobilized require further investigation
Jourdain, Dominique. "Caractérisation expérimentale du canal sous-marin petit fond pour la transmission acoustique horizontale". Grenoble INPG, 1996. http://www.theses.fr/1996INPG0074.
Texto completoRathmann, Ryan James. "Effects of conventional or low bull to female ratio and utilization of reproductive tract scores in extensively-managed, natural mating breeding groups". Texas A&M University, 2005. http://hdl.handle.net/1969.1/4676.
Texto completoLe, Cozannet Gonéri. "Les conséquences de l'élévation du niveau marin pour le recul du trait de côte". Thesis, Paris 1, 2016. http://www.theses.fr/2016PA01H036/document.
Texto completoTo which extent does present day sea-level rise affect shoreline changes? This question remains largely open due to the lack of knowledge and data regarding coastal hydrosedimentary processes and relative sea-level changes (i.e., including vertical ground motions). This PhD Thesis first addresses the question of measuring relative sea-level changes using a combination of geodetic data, including satellite-radar interferometry and permanent GPS stations. Then, it examines the case of coasts that experienced sea-level changes significantly different from the global average over the last 50 years. In the case of atoll islands of French Polynesia, the available data illustrate the major role of southern, trade and cyclonic waves in controlling shoreline changes. For some sheltered coasts, waves are suspected to combine with sea-level rise to favour shoreline retreat. In the case of the European coastal database Eurosion, about 17 000 coastal observations are available and have been analysed using a Bayesian network. Here, part of the spatial variability of shoreline changes can be explained by the fact that Fennoscandian coasts are not only accreting, but also uplifting due to the post-glacial rebound. Overall, these results suggest that it is still too early to observe obvious effects of climate-induced sea-level rise. A probabilistic analysis of the coastal sedimentary equation shows that under common assumptions on hydrosedimentary processes, sea-level rise impacts for beaches should become observable during the second half of the 21st century, if the efforts to maintain climate warming below the 2 C threshold fail. Finally, this PhD thesis offers opportunities for stimulating future research in the field of mathematics applied to the question of climate change and sea-level rise impacts to coastal zones
Ford, Neil C. "Centrifugal Input Modifies Spontaneous Activity of Olfactory Bulb Neurons". University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1368012904.
Texto completoNastase, Gianina Elena. "Le développement commercial de la Roumanie : entreprises françaises et intégration européenne". Thesis, Paris Est, 2015. http://www.theses.fr/2015PESC1086/document.
Texto completoHypermarket distribution is a rather recent phenomenon which justifies a study. It started in 1992 after the fall of the communist regime in December 1989. This event allowed a liberation of the energies in all the domains, in particular in the retail / trade. In the first time, large retailers took place in Bucharest and particularly in the suburbs. In a second time, it spread in the main town. The North of the capital is well enough served in highways. Thanks to the situation, a lot of commercial actors can settle in this place which becomes a trade area. We notice that the first hypermarket opened near the A1 highway towards Pitesti on the North West of Bucharest. A second group of companies goes to the East of Bucharest, next to the Sun highway which links the capital to the port Constanta. The phenomenon became more important thanks to foreign actors. The lack of national strategies explains that the utilities and transport's accessibility are insufficient. Because of its place around the town, hypermarket distribution moved the limits of the town. So we can observe that the trade is linked to suburbanization and marked the apparition of the metropolitan area of Bucarest
Coclet, Clément. "Impacts de la contamination multiple en éléments traces métalliques sur les communautés microbiennes dans un environnement côtier fortement anthropisé : la rade de Toulon". Electronic Thesis or Diss., Toulon, 2019. http://www.theses.fr/2019TOUL0010.
Texto completoToulon Bay is a highly anthropized coastal ecosystem that present multiple trace metal contamination gradients, and was considered as a model system. The coupling of field campaigns and laboratory experiments were used to study the impact of trace metal contamination on bath planktonic and biofilm microbial communities. Chemical analyses, flux cytometry, and metabarcoding were used to study several characteristics of communities, as abundance and taxonomie diversity in response to trace metal contamination in the Toulon Bay. Then, bath ultraphytoplankton and bacterioplankton showed strong spatial patterns along the trace metal contamination gradients. Laboratory experiments showed that trace metals played an important raie on bath abundance and diversity patterns of ultraplanktonic communities, by bath potential direct (toxicity) and indirect (phytoplankton-bacterioplankton interactions). Conversely to planktonic communities, trace metal contamination had limited impact on microbial biofilm community. ln contrast, microbial biofilm community seemed to be influenced by surrounding sediments, and by potential colonizer taxa from benthic compartment resuspended du ring sediment resuspension events. ln conclusion, trace metals seemed to have impacts on all the microbial communities of Toulon Bay, with variations of influence depending on the compartment
Freund, Madeleine [Verfasser], Martin [Akademischer Betreuer] Visbeck y Andreas [Gutachter] Oschlies. "Dispersion of a Tracer in the Eastern Tropical South Pacific - an Investigation of Interactions from the Benthic Boundary Layer to the Ocean Interior - / Madeleine Freund ; Gutachter: Andreas Oschlies ; Betreuer: Martin Visbeck". Kiel : Universitätsbibliothek Kiel, 2020. http://d-nb.info/1210052229/34.
Texto completoPfau-Weller, Natalie [Verfasser] y Josef [Akademischer Betreuer] Schmid. "Tragen die EU-Maßnahmen dazu bei, dass deutsche Großstädte nachhaltiger werden? Eine Untersuchung ausgewählter europäischer Instrumente der nachhaltigen Stadtentwicklung 2000-2012 in Frankfurt am Main / Natalie Pfau-Weller ; Betreuer: Josef Schmid". Tübingen : Universitätsbibliothek Tübingen, 2017. http://d-nb.info/1165309998/34.
Texto completoMcLean, Duncan Ross. "Robert Farquhar et la transformation de l'esclavage : une renaissance du travail non-libre au XIXe siècle". Paris, EHESS, 2015. http://www.theses.fr/2015EHES0053.
Texto completoRobert Farquhar had been an East India Company administrator in the Moluccas at the turn of the 19th century before assuming the governorship of Mauritius as a British civil servant, the latter recently captured during the Napoleonic Wars. It was during Farquhar's earlier stay in the Spice Islands that he became involved in the anti-slavery debate and the future of Caribbean sugar plantations. Given his experience as a colonial administrator, he was well aware of the economic consequences abolishing the Slave Trade would entail. Attuned to the shifting political winds, Farquhar published a treatise in 1807 under the title 'Suggestions, arising from the abolition of the African slave trade, for supplying the demands of the West India colonies'. His ideas were relatively novel in that they involved shifting large impoverished populations, in this case from rural China, to areas previously sustained by slave labour. While initially dismissed as unworkable many of Farquhar's proposals were later adopted in the now well-known practice of indentured labour. The thesis will examine the origins of Asian contract labour through this early proponent. By examining an extensive range of correspondence the evolution of Farquhar's political thought will be traced, culminating in the noted treatise, and his subsequent confrontation with the practical constraints of instituting a new system of unfree labour in Mauritius. In doing so it wil be necessary to place his work in the broader imperial context of the period, along with the specific regions to which he was posted. This will permit drawing conclusions regarding the conditions that led to Farquhar's proposal in addition to its eventual longevity
Butt, Muhammad Shoaib. "Impact of Tariff Cuts on Pakistan: A Computable General Equilibrium Analysis with Particular Focus on Main Exports and Regional Disparities". Thesis, Griffith University, 2006. http://hdl.handle.net/10072/365384.
Texto completoThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Department of Accounting, Finance and Economics
Griffith Business School
Full Text
Tilliette, Chloé. "Influence du fer et autres éléments traces issus des sources hydrothermales peu profondes sur la biogéochimie marine dans le Pacifique Sud-Ouest". Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS046.
Texto completoThe Western Tropical South Pacific Ocean has been identified as a hotspot for dinitrogen (N2) fixation by diazotrophic organisms, with some of the highest rates recorded in the global ocean. The success of these species relies on non-limiting concentrations of dissolved iron (DFe) in the photic layer of the region, whose origin remains unclear. In this thesis work, the distribution of DFe was studied along a 6100-km transect from Noumea to the gyre waters, crossing the Lau Basin and the Tonga Arc (175°E to 166°W, along 19-21°S). Combined with an optimal multiparametric water mass analysis, DFe anomalies were determined over the transect area, the most notable being present along the Tonga Arc. The results demonstrated that water masses of remote origin entering the Lau Basin could not explain the concentrations observed at the surface in this region, leading to the confident conclusion that DFe originates from shallow hydrothermal sources present along the arc. Although a non-negligeable portion of this DFe input is transported over long distances, a large majority is rapidly removed near the sources through a variety of processes highlighted by a box model. Besides iron, hydrothermal fluids are enriched in numerous other metals that may be toxic to organisms. These fluids, introduced directly into the photic layer, could have an impact on phytoplankton. Their effect was evaluated in an innovative experiment during which natural plankton communities were subjected to an enrichment gradient of hydrothermal fluids. Despite an initial toxic effect of a few days, hydrothermal inputs ultimately induced N2 fixation, productivity and organic matter export rates two to three times higher than those of the non-enriched control. This fertilizing effect probably results from the detoxification of the environment, rich in numerous potentially toxic elements, by resistant ecotypes able to produce strong ligands, such as thiols, limiting the bioavailability of certain metals. The additional supply of fertilizing elements by the fluids, in particular DFe, thus allowed the subsequent growth of the most sensitive species. These experimental results, faithfully reproducing the in-situ observations, confirm the involvement of shallow hydrothermal fluids in the high productivity observed in the region. Hydrothermal sources could be traced at different spatial and temporal scales through the deployment of drifting (for a few days, along the Tonga Arc) and fixed (for a year, along the Lau Ridge) sediment traps and through the coring of seafloor sediments at the trap deployment sites (geological time scale). Al-Fe-Mn tracing revealed that the lithogenic material exported at small and large spatial scales in the region originated from shallow and/or deep hydrothermal sources located along the Tonga Arc. This hydrothermal signature has also been detected in the seafloor sediments, particularly in the vicinity of the Lau Ridge where the presence of a major active source is strongly suspected. Finally, the similar patterns observed for the export of biological and hydrothermal particles suggest that surface production is closely linked to hydrothermal inputs into the photic layer. In conclusion, this thesis work has demonstrated the influence of shallow hydrothermal sources on the fate of trace elements, particularly iron, in the water column and seafloor sediments, and their link to biological productivity in the Western Tropical South Pacific region
Mendoza, Choque Luis Enrique. "Main Labor Breaches of the Peruvian State in the Framework of the Free Trade Agreement with the United States". Derecho & Sociedad, 2017. http://repositorio.pucp.edu.pe/index/handle/123456789/118733.
Texto completoEl siguiente artículo parte de antigua y cercana vinculación entre Derecho del Trabajo y el comercio internacional, relación que en los últimos años ha recobrado importancia debido a la aparición de nuevos instrumentos, mecanismos y sanciones. El contenido laboral del TLC con los Estados Unidos y su aplicación se pueden analizar desde distintos ángulos, en el siguiente trabajo nos limitaremos a estudiarlo a la luz de tres elementos: el Principio de Progresividad de los derechos sociales, la naturaleza jurídica del TLC y dos de los regímenes laborales promocionales vigentes en la legislación peruana. Los incumplimientos a los que haremos referencia son los referidos a las dos quejas presentadas por organizaciones sindicales peruanas en el marco de los mecanismos de cumplimiento del TLC. Finalmente, se presentan algunas conclusiones que pretenden contribuir al debate sobre la materia.
PAVONI, ELENA. "TRACE ELEMENTS IN ESTUARINE ENVIRONMENTS: MIXING, PARTITIONING AND FATE IN THE MAIN ITALIAN AND SLOVENIAN RIVER MOUTHS (GULF OF TRIESTE, NORTHERN ADRIATIC SEA)". Doctoral thesis, Università degli Studi di Trieste, 2020. http://hdl.handle.net/11368/2963759.
Texto completoEstuaries are complex aquatic systems at the land-sea interface where the interaction between different water masses leads to strong physico-chemical gradients. Before reaching the coastal zone, the river-transported material must pass through the estuarine environment. In this context, estuaries act as a filter for the freshwater inputs of both dissolved and particulate components. The original river-transported original signals can then emerge from the mixing zone in a form which has been notably modified with respect to that which entered the estuarine system. Trace element distribution, mobility and fate heavily depends on the physical, geochemical and biological processes occurring in the estuarine mixing zone, which also affect the equilibria between solid and dissolved phases. The study of trace element phase partitioning is essential to gain a thorough knowledge of their natural cycles, although significant alterations may be due to the high anthropogenic pressure that often affects estuarine environments. This research includes two main topics. The first concerns trace element (As, Cd, Co, Cr, Cs, Cu, Fe, Hg, Mn, Ni, Pb and Zn) phase partitioning in the main estuarine environments of the Gulf of Trieste (northern Adriatic Sea). In detail, estuarine water samples were collected at the Isonzo/Soča, Timavo/Reka, Rižana and Dragonja River mouths under different seasonal conditions and size fractionation allowed for the isolation of three fractions: suspended particulate matter, colloidal material and the truly dissolved fraction. Further information regarding the investigated estuarine systems was provided by dissolved and colloidal organic carbon, total nitrogen and nutrients including nitrate (N-NO3-), nitrite (N-NO2-), ammonium (N-NH4+), soluble reactive silicate (SRSi) and soluble reactive phosphorous (SRP). Suspended particulate matter plays a crucial role as the main vehicle of trace elements from terrestrial sources to marine coastal areas. Generally, Cr, Cu, Fe, Hg, Ni and Pb are mainly partitioned in the suspended particles and partially bound to the colloidal material. Conversely, As and Cs are preferably associated with the truly dissolved fraction, whereas major differences are observed in the partitioning behaviour of Co, Mn and Zn. Colloidal organic carbon is found to be scarcely present at the river mouths, since the hydrodynamic conditions may weaken the aggregation of very fine particles, thus suggesting that colloids play a minor role. Regarding nutrients, N-NO3- prevails among the forms of dissolved inorganic nitrogen as a result of runoff from soils where agricultural activities take place. In terms of water quality, the DIN:SRP molar ratio indicates that P-limitation prevails at the Isonzo/Soča, Timavo/Reka and Dragonja River mouths. Conversely, the Rižana estuarine system switches from P-limitation, prevailing in autumn and winter, to N-limitation in summer. The second topic of this research is focused on the karstic estuarine system of the Timavo/Reka River where several industrial activities are located. In order to provide a geochemical characterisation, trace elements (Al, As, Ba, Cd, Co, Cr, Cs, Cu, Fe, Hg, Mn, Ni, Pb, V and Zn) were measured in different environmental matrices (water, suspended particles and sediments) as well as dissolved organic carbon, total nitrogen and nutrients. Principal component analysis was employed to depict disparities among the different sectors of the estuarine system. In particular in the innermost sector, sediments were found to be enriched in trace elements and potential adverse ecotoxicological effects were identified for Ni and Hg. Moreover, potential anoxic conditions at the sediment-water interface suggest that removal of trace elements via sulphide precipitation could occur although recycling of sinking Fe and Mn-oxy-hydroxides appears to affect dissolved trace element concentrations in the anoxic water layer.
Joussain, Ronan. "Histoire de l’érosion de l’Himalaya durant le dernier cycle climatique : approches sédimentologiques, minéralogiques et géochimiques des sédiments de la partie proximale de l’éventail sous-marin profond du Bengale". Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS433.
Texto completoThe aim of this study is to reconstruct the erosional history of the Himalayan ranges, in order to connect these parameters to global climatic events and variations in the intensity of the monsoon. In this work, sediments from 3 marine cores collected in the Bay of Bengal, during the MONOPOL cruise were analyzed using mineralogical (XRD and grain-size) and geochemical (major, trace, Nd and Sr isotopic composition) methods. Chronological framework of studied cores were based on δ¹⁸O from planktonic foraminifera (G. ruber), and ¹⁴C ages dating (AMS). These cores cover the last 180 kyr. The multi-proxy approach conducted on these cores, gives us critical information about the source, to reconstruct the temporal variability of sediment export to the proximal northeastern Bengal Fan and its potential links to climatic changes (Indian monsoon and/or sea-level changes). Results also give insights on the chemical weathering processes and the dynamic of transport of the sediments through time as well. Moreover, a high-resolution study, on a site located on the active middle fan channel levee of the fan provides information on changes in the weathering pattern and the dynamic of transport of sediments from the Himalayan system during the Holocene. Thus, it is possible to quantify the impact effect of summer monsoon rainfall during that time interval. These results have been used to assess changes in the sedimentary sources (Indo-Gangetic plain vs highlands) and document the chemical weathering states of the detrital material within the Ganges-Brahmaputra river basin catchment
Tufts, Craig J. "Main Street's Changing as a Central Place, an Economic Center, and a Neighborhood: Regionalization, Retail Trade, and Applying the New Urbanism". Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1126898964.
Texto completoJarreau, Joachim. "Economic policy in globalization : four essays in economics of trade and migration". Thesis, Paris 1, 2013. http://www.theses.fr/2013PA010002/document.
Texto completoThis thesis consists of four chapters that examine various aspects of economic policy in its relation to globalization and economic integration. The first chapter considers the question of the link between trade specialization and growth. The results identify a robust empirical ink between initial level of sophistication at province level and real GOP per capita growth in the case of China. The second chapter examines the relationship between the structure of the Chinese banking system and the structure of exports. The empirical study reveals the presence of credit constraints weighing on domestic private firms, which export relatively less in sectors more dependent on external financing. The third chapter examines the impact of immigration on labor markets in a setting with fragmented regional markets. It shows that in this framework, the spatial mobility of migrant workers contributes to increase the efficiency of labor markets, but immigration policy becomes more restrictive under certain conditions. The fourth chapter examines the determinants of preferential free trade agreements. It shows that the gains in market access are a stronger determinant of a country's probability of signing an agreement than the gains accruing to consumers in the form of lower prices
Goiran, J. P. "Recherches géomorphologiques dans la région littorale d'Alexandrie en Egypte". Phd thesis, Université de Provence - Aix-Marseille I, 2001. http://tel.archives-ouvertes.fr/tel-00326333.
Texto completoThomas, Drew B. "The industry of evangelism : printing for the Reformation in Martin Luther's Wittenberg". Thesis, University of St Andrews, 2018. http://hdl.handle.net/10023/14589.
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