University Of Pau Research Articles

Joanna Szpunar, a great chemical researcher internationally recognized, kindly spoke to BrJAC

Joanna Szpunar graduated from the Warsaw University of Technology in 1986 and obtained her Ph.D. (1992) and D.Sc. (Habilitation) (2000) from the University of Warsaw. Since 1997, she works at the National Research Council of France (CNRS). In 2007, she obtained in Poland the title of professor of chemistry. She has broad experience in the field of mass spectrometry-based bio-inorganic speciation analysis and metallomics with a focus on the identification and quantification of trace element species in biological systems and in the chemistry of metal-biomolecule interactions. She is the co-author of a book and approximately 250 scientific publications in peer-reviewed international journals. Joanna Szpunar is a fellow of the Royal Society of Chemistry (UK) and has been, for many years, a member of the boards of Journal of Analytical Atomic Spectrometry' and Metallomics. She regularly gives invited lectures at international analytical chemistry meetings and was the chairperson of the European Winter Conference on Plasma Spectrochemistry (Kraków, Poland) in 2013. The investigations carried out under her supervision and/or with her active participation resulted in the identification of a number of molecular targets of metals in biological systems, as well as contribute to selenometabolomics and selenoproteomics studies in bacteria and plants. In recent years, her interests were broadened to the environmental fate of metal-containing nanoparticles and nanoplastics. She has supervised 12 Ph.D. theses and several post-doctoral fellows. Joanna Szpunar is the laureate of the 2013 Jerzy Fijalkowski Award of the Committee of Analytical Chemistry of the Polish Academy of Sciences and the 2017 European Award for Plasma Spectrochemistry. In recent years, Joanna Szpunar has been involved in collaboration with analytical chemists in Brazil, hosting graduate students from the University of Campinas and the Federal University of Pelotas in the laboratory at the Institute of Analytical Sciences (IPREM) in Pau afiliated with the CNRS, lecturing at the Federal University of Santa Maria and co-supervising a Ph.D. student with work carried out at the University of Pau and the Federal University of Pelotas.

Speciation of Metals in Asphaltenes by High-Performance Thin-Layer Chromatography and Laser Ablation Inductively Coupled Plasma-Mass Spectrometry

Asphaltenes are considered to be the most problematic components of heavy oils because they can self-aggregate which leads to precipitation and causes various problems during oil recovery, transportation, and refining. The contribution of the porphyrins present in asphaltenes to the aggregation was previously studied by gel permeation chromatography inductively coupled plasma-mass spectrometry (GPC-ICP MS). The molecular weight of asphaltene aggregates was shown to be increased by free metal-containing porphyrins (corresponding to the lower molecular weight fraction) interacting with the aggregate’s surfaces by weak forces. The characterization of free porphyrins within the asphaltenes is therefore for the understanding of the mechanism of the aggregation, coprecipitation, and demetalation processes. Here, we developed a method for the separation of free porphyrins from asphaltenes on the basis of their polarity using high-performance thin-layer chromatography (HPTLC). This technique, using disposable plates, is particularly well suited for asphaltene analysis since it eliminates the risk of clogging typical of column chromatography. Cellulose plates were used in this study. The lower polarity of their hydroxyl groups limit the irreversible adsorption and improves the detection limit by the ICP-MS. Two well-separated peaks were obtained from purified asphaltene (Asphaltene 2017; Asphaltene Characterization Interlaboratory Study for PetroPhase 2017. In Proceedings of the 18th International Conference on Pretroleum Phase Behavior and Fouling, Le Havre, France, June 11–15, 2017; Total, the University of Pau, and the University of Rouen-Normandy: Le Havre, France, 2017.) and its corresponding whole crude oil and C5 and C7 fractions. The distribution of vanadium due to migration was determined by laser ablation (LA) ICP MS. The eluted fraction contained the free porphyrins, whereas the major fraction did not migrate and corresponded to trapped porphyrins. A comparison with the signal obtained by UV densitometry allowed the ratio between the inorganic and organic material to be measured.

A model to analyze the complexity of calculus knowledge at the beginning of University course

Our research focuses on the difficulties students encounter with the learning of calculus, considering that they have to cope with many more mathematical objects but also with new ways of reasoning – not only algebraic calculation, but also the practice of approximation, and a scaffolding way of using functions, limits, derivative, integrals, etc. to justify their answers. The semiotic facet of new objects, and the way to manage it, is also a source of great difficulties. In this article we establish that the model we built (Bloch & Gibel, 2011) is adequate to describe the work of University students who have to deal with the resolution of exercises about parametric curves and differential equations, even if this context is not an adidactical situation. In 2018, L2 students of Pau University were asked to solve little problems about limits, integral calculations or recurrence questions. They revealed difficulties to organize their knowledge and conclude about a limit, for instance. We give some examples of these troubles. We conclude for the necessity to implement adequate devices to help students better understand these 'new mathematics'. Calculus, students' understanding of mathematical signs and objects, reasoning processes, parametric curves, differential equations

Confined impinging air jet on a heated cylinder at low Mach number

Use of onboard electrical systems is vastly expanding in all aeronautical programs. This means that new cooling systems must increasingly be researched. More specifically, this paper focuses on the cooling of a small turbo engine, represented experimentally as a heating cylinder. This new cooling process designed at Pau University, France, provides quite an original experimental set-up. Given the confined nature of the motion fluid, only experimental measurements of medium physical values such as temperature and velocity can be made. In order to better understand and master such a cooling system, which seemingly could have many industrial applications, two different numerical simulations have been investigated. Because of the confined nature of the motion fluid (V = 6.13 m/s, Mach = 0.018) and the highly complex geometrics, no conclusion can be drawn about the fluid compressibility assumption. Therefore, the incompressible model study is carried out using ANSYS-FLUENT software whereas the compressible model study is conducted with elsA software. These two computer programs were chosen because of their capacity for double modelling in the hope that some of the major challenges facing the vast research community in the field of low Mach may be addressed. This study is carried out on two different scales. On the coarse scale there are significant similarities between the experimental results and some 2D simulations on the global convective wall heat flux (better than a 10% relative gap). On the smaller scale, code-to-code comparisons of both assumptions (via both codes) show different vortex structures inside the computational domain. Those vortices have a remarkable influence on the inner-wall heat flux's behaviour but their effect is moderate since their average values do not vary much. Though the velocity is relatively low inside the cavity, we will show that the fluid compressibility is of importance in such computations.

Cooling of a heating cylinder by confined impacting air jets

Purpose The purpose of this paper is to investigate a new cooling process of a heated cylinder with confined impacting air jet. Design/methodology/approach To do this the authors used experience-numerical and numerical-numerical comparisons. The experimental facility, designed and built at the Pau University, consists in air jets impacting around a heated circular cylinder. As the inlet velocity magnitude is low (Vin=4.37 m/s – Machin=0.0125), using a compressible solver for numerical simulations presents a number of difficulties. For this low Mach number configuration, the authors compare the performance of three different solvers in this paper. Two of them are compressible, one based on the finite volume approach and the other on a discontinuous Galerkin method, and the third one is an incompressible solver. Some of the numerical results are compared to experimental data. Findings Comparisons between the results from 3D and 2D computations support the relevance of 2D models. Some of the numerical results are compared to experimental data. Research limitations/implications The confined aspect of the set-up reduces experimental measurement to intrusive measures. It should be noted that the temperature measurement given by thermocouples is always considered as “global” or “average”. Originality/value Future aircraft technology will increasingly rely on electrical power. The substitution of mechanical energy by electrical energy will lead to an increasing amount of heat power that need be evacuated. Innovative cooling processes have to be set up according to constraints imposed by the technological design.

Kajian Produksi Aflatoksin B1 Kasar dari Isolat Kapang Aspergillus Flavus Lokal pada Media Jagung dan Jagung+Kacang Tanah

Aflatoxin, which known as toxigenic compound, is a secondary metabolite produced by Aspergillus flavus and A. parasiticus. Aflatoxin is found in both food and feed stuffs, such as: corn and peanut. Aflatoxin standard is needed in every research of aflatoxin contamination. But it is rather difficult to get. It is imported, high costs, and take times. The aim of the research is to assess the potential local isolate of A. flavus to producing aflatoxin that can be used to be the alternative aflatoxin standard. Local mold of A. flavus FNCC 6122 and FNCC 6109 are got from PAU University of Gadjah Mada. Isolate was enriched on PDA medium for 5 days and move to corn medium of corn+peanut combine medium for 10-15 day at 25oC. The variables was the content of AFB1 by ELISA test. The result is shown that isolat FNCC 6122 produced higher AFB1 than isolate FNCC 6109. The combine of corn and peanut medium stimulated FNCC 6122 to produce higher AFB1 and has potency to be the candidate of standard aflatoxin. In conclusion, the peanut addition on the medium would initiate increasing of the aflatoksin B1 level.

Determination of Hg isotopic compositions in certified reference material NIES No. 13 Human Hair by cold vapor generation multi-collector inductively coupled plasma mass spectrometry

Hg isotopic ratios of NIES CRM No. 13 Human Hair were analyzed using cold vapor generation coupled to multi-collector inductively coupled plasma mass spectrometer to meet the growing demand for better understanding of Hg exposure routes by using Hg isotopic compositions in human hair samples. To validate and assure the accuracy of our analytical method, (1) the reproducibility of the Hg isotopic measurement was monitored and (2) the Hg isotopic compositions of four secondary reference materials—IAEA-085, IAEA-086, and CRPG-RL24H—were measured. Our results for NIES CRM No. 13 show the mass-dependent fractionation values of δ 199Hg = (2.13 ± 0.07) ‰, δ 200Hg = (0.98 ± 0.08) ‰, δ 201Hg = (2.77 ± 0.10) ‰, δ 202Hg = (1.89 ± 0.10) ‰, and δ 204Hg = (2.76 ± 0.16) ‰ (2SD, n = 11) and the mass-independent fractionation values of Δ 199Hg = (1.65 ± 0.06) ‰, Δ 200Hg = (0.04 ± 0.04) ‰, Δ 201Hg = (1.36 ± 0.07) ‰, and Δ 204Hg = (−0.04 ± 0.11) ‰ (2SD, n = 11). Interlaboratory comparison of the CRM performed at the University of Pau showed good agreement with the values obtained at NIES.

Experimental demonstration of the effectiveness of an early streamer emission air terminal versus a franklin rod

This paper is devoted to a detailed presentation of all aspects involved in a novel experimental technique to prove the effectiveness of an early streamer emission air terminal (ESEAT) versus a traditional Franklin rod in a laboratory. Firstly, a theoretical basis for the equivalent-circuit analysis of an ESEAT model is presented. It is shown that the dynamic electric field intensity on the active ESE rod is higher (theoretically even twice as high) than the static field intensity of the conventional Franklin lightning rod. Then, an experimental test using a method and associated with an electrostatic simulation demonstrates the effectiveness of an ESEAT (Pix3-60 from Piorteh Company) versus a conventional Franklin rod in the SIAME laboratory of the University of Pau in France. This method consists in locating both the ESE terminal and the Franklin rod together in the same configuration in accordance with the French Standard NFC 17-102 (09/2011). During the tests, all discharges were recorded on the ESEAT manufactured by Piorteh Company when its rod was active. This experimental test could be used on any kind of lightning protection device.

Photocatalysis: fundamentals and applications in JEP 2011

As part of catalysis—and more precisely of heterogeneous catalysis—heterogeneous photocatalysis is an area of chemistry impacting many reactions as varied as total or mild oxidation reactions, dehydrogenation reactions, metal deposition, hydrogen transfers, etc. These different reactions are mainly facing applications in the field of water and air purification treatments—targeting both chemical pollutants and biological ones, self-decontaminating or self-cleaning products, organic fine chemistry as well as energy-related areas with hydrogen production from water. Relative to the history of catalysis processes, coined by Berzelius at the beginning of nineteenth century, photocatalysis remains a recent discipline, as marked by J.M. Herrmann in its introductory paper of this Special Issue. Basically, photocatalysis differentiates from conventional catalysis by the activation of the catalytic solid, which occurs through photon absorption rather than by thermal activation. This photonic activation thus requires the use of a semiconductor material as catalyst, provided that the radiation wavelengths are greater than its band gap, which corresponds to the energy gap between both conduction and valence bands of the semiconductor. Activating a semiconductor leads to the promotion of an electron from the valence to the conduction band, with the simultaneous creation of a photogenerated hole within the valence band. Further, the transfer of photogenerated charge carriers to the photocatalyst surface allows redox reactions to occur with adsorbed reactants, coming from gas or liquid phase depending on the application. At the catalyst surface, the redox reactions are separated into reduction and oxidative steps, involving on one hand, conduction band electrons and adsorbed electron acceptors such as, e.g., oxygen molecules (eCB +A→A), and on the other hand, valence band holes and adsorbed electron donors such as, e.g., organic molecules or more generally the targeted pollutant (hVB + D→D). Indirect oxidation reactions also occur through the formation of highly oxidative hydroxyl radicals generated by the oxidation of water by holes. Thus, the photocatalysis discipline exists through the ability of a material, in this case a semiconductor (usually TiO2), to simultaneously interact with light and reactants, through both aband adsorption phenomena, respectively. Nowadays, the “Advanced Oxidation Process” (AOP) nature of photocatalysis remains the most exploited, facing applications in the field of water and air purification treatments and self-decontaminating/self-cleaning products. On one hand, the implementation of photocatalysis for environmentally friendly cleaning water or air fits into a sustainable development approach, driven by the search for alternative S. Lacombe (*) Institute for Analytical Sciences and Physico-Chemistry for Environment and Materials (IPREM), UMR 5254 CNRS, University of Pau and Pays de l’Adour, Helioparc : 2 avenue of President ANGOT, 64053 Pau Cedex 09, France e-mail: sylvie.lacombe@univ-pau.fr

Compact Self-Loaded Marx Generator with Integrated Pulse-forming Line for an Ultra-Wideband Source

The paper presents a study on the development of an autonomous, repetitive, pulsed power generator based on a self-loaded Marx generator. Three French entities: CEA, Technix and LGE (Pau University), developed a tightly integrated unit, including a battery pack, an intermediate dc/dc converter, a high-voltage dc/dc converter, a control system, and a high pulse repetition frequency (PRF) Marx generator with its integrated pulse-forming line (PFL). This complete device is able to deliver 150 kV pulses into a 50 Ω impedance with the following principle characteristics: a rise time of about 650 ps, a fall time lower than 300 ps, a pulse width of about 1.6 ns, a repetition rate of 100 Hz and a burst duration of 10 s. The details of this repetitive peak power generator are presented in this paper. The results of preliminary tests are also included.

Forms and issues of the spatial integration of a university in a medium-sized town. The case of the scientist research of the Pau University

Les recherches qui ont porté sur l’évaluation des transferts entre université et territoire ont montré leur participation au développement local. Par ailleurs, ces échanges entre entreprises et laboratoires sont favorisés par des effets de proximité spatiale, particulièrement avérés pour les grands centres universitaires. Qu’en est-il pour les universités plus modestes associées à des zones urbaines de taille moyenne ? Nous avons souhaité aborder la question au travers du cas de l’université de Pau et des Pays de l’Adour (UPPA) à partir de l’identification de toutes les formes d’interactions entre le monde de la recherche et le territoire qu’elles soient de nature économique, sociale ou culturelle. La présente recherche tend à montrer que l’impact local de l’université est loin d’être négligeable et se développe sur plusieurs dimensions complémentaires : - un volet économique correspondant au transfert de connaissances et de compétences du système de recherche vers l’industrie et les services en partenariat avec les entreprises et collectivités - une source d’animation du tissu culturel local à travers la valorisation socioculturelle des savoirs scientifiques à l’intention du grand public qui sert de ressource pour l’ensemble du territoire. Ces différentes formes de transfert des savoirs issus de la recherche se font en faveur du tissu socio-économique local de proximité : la zone urbaine paloise. L’ancrage local de l’université de Pau est lié à l’offre d’un véritable système local de compétences et par là même se place comme moteur du développement local. En effet, l’emprise géographique de la diffusion des savoirs culturel et économique est une dimension essentielle pour comprendre la plus-value de l’université, un élément fondamental de l’ancrage territorial d’une université dans la ville moyenne.

Evaluation of the Petrophysical Properties of a Carbonate-Rich Caprock for CO2-Geological-Storage Purposes

This article, written by Senior Technology Editor Dennis Denney, contains highlights of paper SPE 131525, ’Evaluation of the Petrophysical Properties of a Carbonate-Rich Caprock for CO2- Geological-Storage Purposes,’ by Nicolas Tonnet, and Daniel Broseta, SPE, University of Pau, and Gerard Mouronval, Total, prepared for the 2010 SPE EUROPEC/EAGE Annual Conference and Exhibition, Barcelona, Spain, 14-17 June. The paper has not been peer reviewed. Before any CO2-geological-storage operation, the caprock’s ability to prevent CO2 leakage must be assessed carefully. Preventing leakage is related primarily to the caprock pore structure and to the interfacial properties of the caprock and the fluids in place, specifically the brine that imbibes into the caprock and the CO2 stored in the underlying reservoir. An experimental effort characterized some of these parameters in the carbonate-rich caprock and the reservoir conditions of a depleted gas field in France. Introduction The ability of the caprock to prevent leakage in a CO2-geological-storage operation must be assessed early in the planning stage in a depleted hydrocarbon reservoir or a deep saline aquifer. In the case of hydrocarbon reservoirs, the existence of a top seal (or caprock) is proven, but only with respect to hydrocarbons. In the case of deep saline aquifers, little is known about the confining properties of the overlying low-permeability layers, referred to here as caprock for simplicity. Leakage through the caprock may occur by either mechanical or capillary failure. Both processes are caused by an overpressure in the fluid saturating the underlying reservoir. Capillary failure is considered the normal mode of caprock failure under moderate-overpressure conditions, whereas mechanical failure tends to occur for high overpressures and very tight caprocks. Mechanical failure, which includes the hydraulic or thermal generation of fractures and the reactivation of pre-existing faults, may give rise to significant leakage rates in specific zones of the subsurface. Capillary failure, however, gives rise to more pervasive and slower leakage. It occurs when pressure in the CO2 phase in the reservoir is large enough to force the CO2 into the overlying fine-grained (or low-permeability) caprock, in which the saturating brine phase is thus displaced by the intruding CO2 phase. This drainage process is controlled by the caprock pore structure and by the interfacial properties of the caprock and saturating fluids (brine and CO2). To avoid leakage, the reservoir pressure beneath the caprock should be maintained below displacement (breakthrough) pressure, Pd, assumed here to be lower than the minimum pressure required for caprock mechanical failure. However, if the pressure is higher than Pd (but still lower than the pressure for caprock mechanical failure), leakage through the caprock is acceptable if gas (CO2) effective permeability is low enough. Effective permeabilities in the nanodarcy range or lower are considered acceptable.

Eighth International Conference on Petroleum Phase Behavior and Fouling

ADVERTISEMENT RETURN TO ISSUEEditorialNEXTEighth International Conference on Petroleum Phase Behavior and FoulingJean Luc DaridonView Author Information University of Pau, FranceCite this: Energy Fuels 2008, 22, 2, 695–696Publication Date (Web):March 19, 2008Publication History Received9 January 2008Published online19 March 2008Published inissue 1 March 2008https://doi.org/10.1021/ef800020jCopyright © 2008 American Chemical SocietyRIGHTS & PERMISSIONSArticle Views451Altmetric-Citations1LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (41 KB) Get e-AlertsSUBJECTS:Deposition,Fluids,Fossil fuels,Lipids Get e-Alerts

Africa and globalization: What perspectives for the future of the continent?

The author has a Ph. D in Geography obtained from the University of Pau, France. She is studying the territorialization processes in Africa, with regard both to macro-economics dynamics of development and to management of hydraulic resources in an arid and dry tropical context. She has spent long periods of time in Burkina Faso, Niger and Egypt, where she worked with international organizations. She is currently doing a Post-Doctorate at the University of Bologna; she is an Associate Researcher of the Centre d'Etudes et de Documentation Economiques, Juridiques et Sociales (CEDEJ), Cairo, Egypt.

Africa and globalization: What perspectives for the future of the continent?

The author has a Ph. D in Geography obtained from the University of Pau, France. She is studying the territorialization processes in Africa, with regard both to macro-economics dynamics of development and to management of hydraulic resources in an arid and dry tropical context. She has spent long periods of time in Burkina Faso, Niger and Egypt, where she worked with international organizations. She is currently doing a Post-Doctorate at the University of Bologna; she is an Associate Researcher of the Centre d'Etudes et de Documentation Economiques, Juridiques et Sociales (CEDEJ), Cairo, Egypt.

Contrôle thermique de parois de chambre de combustion. Banc d'essai du laboratoire aquitain de recherche en aérothermique

Thermal control of combustion chamber walls. LARA's test bench. Convective heat transfer along the wall of a combustion chamber is a major source of concern for a gas turbine engine manufacturer like Turboméca. This topic led to a joint research project with the University of Pau : to this end, a specific test bench with up-to-date means of measurement (IR thermography, laser doppler velocimetry) was created. An initial literature study had shown that multi-hole cooling had not been previously studied with a geometry design close to the real case. The present test facility provides and controls the dynamic and thermal parameters of a combustion chamber and the multi-hole cooling was set up on a flat plate simulating the wall chamber. This plate is submitted on one side to the hot gases resulting from combustion and on the other side to the cooling air flow. Dynamic and thermal entry conditions of the hot and cold flows were carefully controlled and are now presented. The wide possibilities of the testing facility have been explored offering scopes for other experimental studies.

Geography and National Identity

Introduction: David Hooson (University of California). Part I: Long Established Imperial Identities: 1. European and English Landscapes as National Symbols: David Lowenthal (University College London). 2. From Michelot to Braudel: Personality, Identity and Organization of France: Paul Claval (University of Paris--Sorbonne). 3. National Identity in Vidala s Tableau de la Geographie de la France: Maire--Claire Robic (CNRS, Paris). 4. In Search of Identity: German Nationalism and Geography 1871--1910: Gerhard Sandner (Hamburg University). 5. Berlin or Bonn?National Identity and the Question of the German Capital: Mechtild Rossler (UNESCO World Heritage Centre, Paris). 6. Nationalism and Geography in Modern Japan -- 1880s to 1920s: Keiichi Takeuchi (Hitotsubashi University, Tokyo). 7. Russian Geographers and the 'National Missiona in the Far East: Mark Bassin (University of Wisconsin--Madison). 8. Ex--Soviet Identities and the Return of Geography: David Hooson (University of California). 9. 'National Unitya and National Identities in the Peoplea s Republic of China: Lisa E. Husmann (University of California). Part II: Long Submerged Identities: 10. Edgar Kant and Balto--Skandia: Heimatkunde and Regional Identity: (Anne Buttimer (University College, Dublin). 11. Stateless National Identity and French--Canadian Geographic Discourse Vincent Berdoulay: (CNRS, University of Pau, France). 12. Nationalism and Geography in Catalonia: Mo Dolors Garcia--Ramon and Joan Nogue--Font (University of Barcelona, University of Girona). 13. Two Geopolitical Concepts of Poland: Jozef Babicz (Polish Academy of Sciences, Warsaw). 14. The Polish Image of Poland: Ladis K. D. Kristof (Portland State University, Oregon) 15. National Identity of the Ukraine: Ihor Stebelsky (University of Windsor, Canada). 16. Quest for Slovene National Identity: Jospeh Velikonja (University of Washington, Seattle). Part III: Newly Emerging National Identities: 17. Coming to Terms with Australia: J. M. Powell (Monash University, Australia). 18. Geography and National Identity in Australia: O. H. K. Spate (Australian National University). 19. South Australia: Discoverers, Makers and Interpreters: Murray McCaskill (Flinders University of South Australia). 20. Maori Identity and Maori Geomentality: Hong--key Yoon (University of Auckland, New Zealand). 21. Multiple Identities in the South Pacific: Ron Crocombe (University of the South Pacific). 22. Tradition, Culture, and Imposed Change in Indonesia: Cheri K. Ragaz (University of Zurich, Switzerland). 23. Geography, Identity and Patriotism in Argentina: Marcelo Escolar, Silvina Quintero and Carlos Reboratti (University of Buenos Aires). Afterword. Identity Resurgent -- Geography Revived: David Hooson (University of California). Index.

3rd International Conference on Mathematical Population Dynamics 1–5 June 1992, University of Pau, France

3rd International Conference on Mathematical Population Dynamics 1–5 June 1992, University of Pau, France

3rd International conference on Mathematical Population Dynamics 1?5 June, 1992, University of Pau, France

3rd International conference on Mathematical Population Dynamics 1?5 June, 1992, University of Pau, France

L'Université de Pau dans les pays de l'Adour

The catchment area of the university of Pau (SW Fraonce). The little recent University of Pau recruits most of its 6 000 students in Pau and in its suburbs (1980-81). Meanwhile most of the 15 500 students (1978-79) who were living in the Adour basin were inscribed in other universities and mainly in those of Toulouse and Bordeaux, the catchment areas of which interfere and extend over that of Pau.