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1. |
Record Nr. |
UNINA9910552898603321 |
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Autore |
Lafarge Géraud |
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Titolo |
Les diplômés du journalisme : Sociologie générale de destins singuliers / / Géraud Lafarge |
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Pubbl/distr/stampa |
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Rennes, : Presses universitaires de Rennes, 2021 |
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ISBN |
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Descrizione fisica |
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1 online resource (288 p.) |
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Collana |
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Soggetti |
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Anthropology |
sociologie |
information |
communication |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Sommario/riassunto |
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Le journalisme est un secteur qui semble touché par une crise durable, massive et double. Une crise économique qui ne cesse de réduire le nombre et la taille des rédactions. Une crise symbolique avec une défiance croissante envers une profession dont les membres et les productions sont contestés et rejetés parfois violemment. La critique de professionnels formatés et d’un monde où la diversité sociale n’a pas sa place vient la renforcer. Pourtant les formations au métier de journalistes se multiplient et les vocations sont nombreuses. Porter une attention particulière aux propriétés et trajectoires sociales des étudiants en école de journalisme, comme le fait cet ouvrage qui s’appuie sur une enquête statistique et des entretiens, permet de sortir de ces paradoxes et de mettre en lumière les conditions sociales de l’entrée et du maintien dans la profession de journaliste. Si la raréfaction des postes combinée à la course au diplôme tend à accroître la sélection à l’entrée, c’est à un espace hiérarchisé de formations que sont confrontés les prétendants au métier dont les exigences sont aussi celles de la reproduction sociale du groupe familial. Les ressources décisives pour l’entrée dans ces écoles (économiques, culturelles mais aussi sociales), le sont aussi pour les carrières professionnelles qui |
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confirment la hiérarchie de ces établissements. Ces différences se retrouvent dans les trajectoires singulières vécues par les étudiants montrant la nécessité sociale derrière la singularité des carrières individuelles. Ces évolutions traduisent l’institutionnalisation croissante de cet univers a priori incertain qu’est le champ journalistique. |
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2. |
Record Nr. |
UNINA9911006772503321 |
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Autore |
Kresic Neven |
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Titolo |
Groundwater hydrology of springs : engineering, theory, management, and sustainability / / Neven Kresic, Zoran Stevanovic |
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Pubbl/distr/stampa |
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Amsterdam ; ; Boston, : Butterworth-Heinemann, c2010 |
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ISBN |
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1-282-61857-1 |
9786612618574 |
0-08-094945-2 |
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Descrizione fisica |
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1 online resource (593 p.) |
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Altri autori (Persone) |
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Disciplina |
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Soggetti |
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Groundwater - Quality |
Water quality management |
Groundwater - Management |
Hydrogeology |
Springs |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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Front Cover; Groundwater Hydrology of Springs; Copyright Page; Contents; Preface; About the Editors; List of Contributors; Chapter 1: Sustainability and management of springs; 1.1 Introduction; 1.2 Concept of sustainability; 1.3 Spring management; 1.3.1 Source and resource protection; 1.3.2 Protection versus restoration; References; Chapter 2: Types and classifications of springs; 2.1 Types of springs; 2.1.1 Submerged springs; 2.1.2 Thermal and mineral springs; 2.2 Classifications of springs; 2.3 Karst springs and karst aquifers; 2.4 Springs in extrusive volcanic rocks; References |
Chapter 3: Recharge of springs3.1 Gaining, losing, and sinking |
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streams; 3.2 Artificial and environmental tracer methods; 3.2.1 Artificial tracers; 3.2.2 Environmental isotopes; References; Chapter 4: Spring discharge hydrograph; 4.1 Introduction; 4.2 Equations of recession discharge; 4.2.1 Approximation with linear reservoirs; 4.3 Separation of discharge components; 4.4 Probability of spring flows; 4.4.1 Probability of minimum and maximum flows; 4.4.2 Time series analysis; 4.4.3 Frequency analysis of extreme flows; References; Chapter 5: Modeling; 5.1 Introduction |
5.2 Correlation and regression5.3 Autocorrelation and cross-correlation; 5.4 Autoregressive-cross-regressive models (ARCR); 5.5 System analysis and transfer functions; 5.5.1 Composite transfer functions; IUH for the slow flow; Antecedent recession; Effective rainfall; Parameter estimation; 5.5.2 Application for water management; 5.6 Time series models; 5.7 Deterministic models; 5.7.1 Analytic models (equations of groundwater flow); Aquifer in unconsolidated sediments; Fractured rock aquifer; Karst and pseudokarst aquifers; 5.7.2 Representative hydraulic heads; 5.7.3 Numeric Models; References |
Chapter 6: Springwater geochemistry6.1 Physical chemistry of natural waters; 6.1.1 Introduction; 6.1.2 Chemical equilibrium and mineral saturation; 6.2 Springwater from silicate rocks; 6.2.1 The dissolution of silica and silicates; 6.2.2 Springs in shales, sandstones, and granites; 6.2.3 Cold water springs in volcanic rocks; 6.3 Springwater from carbonate rocks; 6.3.1 The dissolution of limestone and dolomite; 6.3.2 Chemical kinetics and nonequilibrium; 6.3.3 Chemical characterization of carbonate springwater; Hardness; Ca/Mg ratio; Calculated Co2 partial pressure; The saturation index |
6.3.4 The chemistry of karst springs6.3.5 Time-dependent spring chemistry: Chemographs, turbidographs, and storm flow; 6.3.6 Travertine-depositing springs; 6.3.7 Contaminant transport in carbonate springs; Water-soluble compounds; Light, nonaqueous phase liquids; Dense, nonaqueous phase liquids; Metals; Pathogens; Trash; 6.4 Gypsum springs; 6.5 Mineral springs and thermal springs; 6.5.1 Sulfur springs; 6.5.2 Brine and brackish springs; 6.5.3 Carbonated springs from deep sources; 6.5.4 Water chemistry at high temperatures; 6.5.5 Volcanic hot springs; 6.6 Conclusions; Acknowledgments |
References |
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Sommario/riassunto |
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Groundwater Hydrology of Water Resource Series Water is an essential environmental resource and one that needs to be properly managed. As the world places more emphasis on sustainable water supplies, the demand for expertise in hydrology and water resources continues to increase. This series is intended for professional engineers, who seek a firm foundation in hydrology and an ability to apply this knowledge to solve problems in water resource management. Future books in the series are: Groudwater Hydrology of Springs (2009), Groudwater Hydrology of River Basins (2009), Groudwater Hydrolog |
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