Teses / dissertações sobre o tema "Sidérurgie"
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Guzmán, Alenka. "Les sources de la croissance, de la productivité et de la compétitivité : l'industrie sidérurgique mexicaine (1984-1994)". Paris 3, 1999. http://www.theses.fr/1999PA030032.
Texto completo da fonteThe thesis has double aim. The first one is to measure the total factors productivity tfp (19841994) and to evaluate the competitiveness of mexican's steel industrie. The second one, it is to identifie the facteurs wich explain the economic growth and the productivity of this industry in analyzing the experience of mexican's steel firm hylsamex. In the first part of the thesis, we introduce the conceptual and theorical framework useful for the methodological development. In the second part, we analyse the technological changes and the restructuring process of the international's steel industry with the globalisation and regionalisation process. In the last part, we analyse the development of the mexican's steel industry, its productivity and competitiveness's performance (1984-1994) in considering our measures of tfp and finally, the evolution of technological capabilites of mexican'steel firm hylsamex
Schmidt, Arturi Carlos. "La sidérurgie dans la formation économique et sociale du Brésil". Paris, EHESS, 2000. http://www.theses.fr/2000EHES0117.
Texto completo da fonteSallot, Jean. "Le contrôle des prix et la sidérurgie française : 1937-1974". Paris 1, 1993. http://www.theses.fr/1993PA010681.
Texto completo da fonteFrom 1937 to 1974 the prices of the products of the french iron and steel industry were controlled by the authorities, which is what the industrialists have considered as the major cause of the crisis the industry went through in the seventies and of its particular feature, that is, massive debts and, because of the worsening economic crisis, a growing insolvency of the firms. However, the detailed analysis of the different periods when price control was enforced leads to more qualified conclusions. The effects of the price control, limited during the front populaire period and even world war ii, are more traceable from 1944 to 1953 but cannot be held fully responsible for the increasing debts the firms got into. Similarly, however anachronistic the price control may seem after the opening of the common market, it won't appear fully inadequate until the 1960's when its inadequacies and contradictions added up. As for its being reinforced from 1969 to 1974 it is nothing more than an epiphenomenon. These changing trends thus strongly question the idea that the iron and steel industry lost money because of price control
Agache, Christine. "Les identités professionnelles dans la sidérurgie et leur transformation : l'exemple des opérateurs des salles de contrôle des hauts-fourneaux à Usinor-Dunkerque". Lille 1, 1989. http://www.theses.fr/1989LIL12002.
Texto completo da fonteResearch has confirmed the hypothesis of the existence of four main types of professional identities among workers from the example of the operators of the controlling rooms in the iron and steel industry. The first identity is an old identity which is preserved and built around work. It corresponds to operators who are about to reach retirement age and who do not have any qualifications for vocational training. The second one is an old identity reconstructed around the non - stop vocational training. It corresponds to younger operators who have vocational qualifications given by the firm and equivalent to the "baccalaureat". The third one is an old identity in the pro- cess of reconstruction which is based on the involvement in the life of the firm in order to secure the jobs. It corresponds to young operators who do not have any vocational qualifications equivalent to the "baccalaureat". The fourth one is completely new. It has to do with young people who have passed their baccalaureat and have been recently employed. They expect a promotion and are competing with the previous young operators for work and promotions. Research has also found out the existence of four main types of social identities
Barthel, Charles. "Les maîtres de forges luxembourgeois, entre les débuts difficiles de l'UEBL et le Locarno sidérurgique des cartels internationaux : 1918-1929". Aix-Marseille 1, 2004. http://www.theses.fr/2004AIX10032.
Texto completo da fonteSarreste, Florian. "La sidérurgie ancienne dans le Bas Maine (VIIIe s. av. J.-C. - XVe s. ap. J.-C.)". Thesis, Tours, 2008. http://www.theses.fr/2008TOUR2008/document.
Texto completo da fonteThe “Bas Maine” composed of the county of Mayenne, western Sarthe and south-western Orne), and situated in the north-western France, takes back the outlines of the ancient diablinte civitas. Former researches and some rare discoveries indicated the presence of iron production areas preceeding the appearance of blast furnace (at the end of the 15th century) in this region. The use of different documentary research methods and field survey permit to register more than 420 iron smelting slag sites which form several iron production areas. The largest ones are located along the border of the counties of Mayenne and Sarthe. Besides, the excavation led on a slag heap and the analyses of residues collected on iron smelting sites and in the iron-making workshops of the diablinte civitas capital, Noviodunum/Jublains (Mayenne), bring new data on the organisation of iron production during the Antiquity, the best known period in the region, and allow us to propose the existence of technical variations within the bloomery process
Abdo, Diala. "Modélisation dynamique et supervision des fours de réchauffage continus de la sidérurgie". Phd thesis, École Nationale Supérieure des Mines de Paris, 2006. http://pastel.archives-ouvertes.fr/pastel-00002236.
Texto completo da fonteMioche, Philippe. "La sidérurgie et l'Etat en France des années quarante aux années soixante". Paris 4, 1992. http://www.theses.fr/1992PA040191.
Texto completo da fonteStarting from an investigation of the economic, social political and technical changes in the French steel industry from the beginning of the 1940s up to and including the 1970s, the question is to determine whether economic policy (that of the state) was the essential factor behind the changes which led the French steel industry from strong growth to lasting recession, and if not, to find out what the underlying causes were. The transformation of the French steel industry was complete by the end of the 1970s. The process was not unique; it was common to all great steel industries. It heralded the beginning of the great industrial recession at the end of the twentieth century. What was unusual in France was that this transformation came about in spite of specific difficulties : the legacy of corporatism, with its inevitably harmful effects, its chief drawback being that it was one intermediary too many between the companies and the market, between their leaders and the state. The economic policy was not always mistaken, although two important mistakes were made: indecisiveness at the liberation and the delay in building the steel works at Fos
Kohler, Dorothée. "La Stahlstadt : les villes de l'acier en Allemagne : empreinte et matrice du triptyque Etat-sidérurgie-ville : l'exemple de duisbourg et d'Eisenhuttenstadt". Paris 1, 2000. http://www.theses.fr/2000PA010644.
Texto completo da fonteTruffaut, Edmond. "Manganèse et acier : contribution à l'histoire de la sidérurgie en France, 1774-1906". Paris 1, 2000. http://www.theses.fr/2000PA010614.
Texto completo da fonteDa, Silva Eneida A. Paulino. "La sidérurgie brésilienne : développement, action de l'Etat et principaux aspects de son organisation". Paris 1, 1987. http://www.theses.fr/1987PA010609.
Texto completo da fonteDethier, Guy. "Les mutations de la sidérurgie française face à la mondialisation : (concurrence et développement de la construction européenne)". Paris 4, 2004. http://www.theses.fr/2004PA040030.
Texto completo da fonteThe French steel industry, as a basis of numerous economical activities, could hardly avoid trade globalization and its worldwide development. For long a national activity by the nature of its production, its patrimonial management will be as well. The two major world conflicts will thrust the steel industry activity into the heart of the idea of European construction, idea that had mainly been developed around political projects. The urge for peace after World War II and the need to ensure the development of the French steel production brought Jean MONNET to propose a solution to these issues. The European steel community resulting from the CECA treaty would thus be the basis of development of trade and allow an enlargement to other fields and other partners than the six founding countries. This new deal would not yield rapidly any significant mutations for the French steel industry due to the strong market demand which will prevail until the 1974 crisis. This crisis would push forward new steel protagonists and new highly competitive fields of production leading traditional steel industries to the bankruptcy. The necessary restructuring resulting from this situation, backed by Communauty measures, after nationalization, then privatization of the sector in France, would lead to the restoration of profitable business, high external development and activity globalization. This evolution will lead the French steel industry to take part in the creation of the world leader in the profession
Macaire, Ludovic. "Inspection d'états de surfaces métalliques par vision linéaire : Application au contrôle qualité continu en sidérurgie". Lille 1, 1993. http://www.theses.fr/1993LIL10005.
Texto completo da fonteDos, Santos Ferreira José Artur. "Crise des marchés internes du travail et apprentissage : le cas de la sidérurgie brésilienne". Paris 13, 2009. http://www.theses.fr/2009PA131013.
Texto completo da fonteSince R. NELSON & S. WINTER (1982), the cognitive dimension of the firm has been emphasized by the evolutionists. Their loyalty to neo-Schumpeterian heritage has resulted in a strong affinity towards the problematic of the economy of the technology. Due to this kind of exchanges, and also impregnated with the institutionalism tradition in economy and the organisations theory, they were conduced to explore the inertia and the change at the same time. Their problematic was developed through various notions: the uncertain and cumulative character of the technical progress, the technological paradigms and trajectories, the irreversibility of choices, the phenomenon of lock-in at suboptimal trajectories, the routines and the learning process, and the national innovation systems, for instance. However, despite these theoretical advancements, the evolutionist theory will face difficulties in dealing with the enterprise’s political dimension and in inserting it in the innovation and learning process. This thesis has exactly the ambition of contributing to fulfil this gap. On the one hand, the thesis takes into account the ways of institutionalisation of the employment relationship and the modes of organisation of human resources’ management. On the other hand, it considers the modes of institutionalisation of innovation process and the modes of organizing the learning process in the enterprises. The experience of the Brazilian iron and steel industry help to discuss the limits and possibilities of the emergency of cooperative relations, considering the local specificities of the employment relations and the importance of incremental innovations in this industry
Adam-Gironne, Jean. "Le droit social et l’emploi : l’exemple de la restructuration dans la sidérurgie lorraine (1966-1986)". Nancy 2, 1997. http://www.theses.fr/1997NAN20009.
Texto completo da fonteThe rapidity and the importance of the economic evolutions in the industrial countries occasion restructuring's problems for the industrial companies. The restructuring in the steel industry (1966 - 1986) gives an illustration of palliative solutions with juridical procedures of social law. The steel industry has utilized the early retirement allowances ‘way. In effect, the workers' unions reclaiming. With insistence, early retirement, this has been for the employers' organizations a convenient method in the management of their oldest workers. In the steel industry this was put in concret forme by the negotiation of several social agreements that have limit social disturbances, but she were signed with a very important financial assistance of the state; so, in spite of a dramatic economic crisis was preserved a relative social peace with this kind of social protection
Rynikiewicz, Christophe. "Contrainte d'environnement global et changement technique induit : vers des trajectoires d'innovations radicales dans la sidérurgie". Grenoble 2, 2007. http://www.theses.fr/2007GRE21013.
Texto completo da fonteThis thesis aims to investigate the responses of the steel industry sector to the global carbon constraint (permits, taxes) and specifically the ULCOS (Ultra Low CO2 Steelmaking) technologies. The analysis relates more precisely to the conditions of the greening of innovations, the selection of new incremental and radical innovation and the inter-technology competition. It takes into account the uncertainty of the selection environment (evolution of the prices of energy, carbon, raw materials, steel demand, conditions of competition). The influence of the modification of the induced relative prices under different simulations is dealt with a partial equilibrium model. Complementary concepts of industrial economics and investment under uncertainty related to the decision, adoption and diffusion of technologies have been explored. I highlight the promising complementary work of integrating anticipation of actors and imperfect competition. The methodology developed is potentially useful for other sectors (industries of cement, paper, aluminium…). This case study on steelmaking illustrates the theoretical framework of the pluridisciplinary scientific agenda IHDP-Industrial Transformation that combines evolutionary and neoclassical economics of technical change
Sekkoum, Ounessa. "Les difficultés de l'industrialisation : cas de l'Algérie : étude de la politique de la gestion du personnel de la Société nationale de sidérurgie sur le site d'Annaba". Lyon 2, 1986. http://www.theses.fr/1986LYO22009.
Texto completo da fonteIn algeria, the process of industrialisation fostered a strong movment of equipements and techniques. The lack of qualified people created difficulties as far as mastering imported techniques is concerned. But the level of mecanisation and integration of working machines inside the units of production is not enough for driving an indeft analysis about the non mastering process of imported techniques. Actually, this techniques are embodied in the practical conditions of conceptions and production of their inderground logic : the capitalist system. Therefore the workorganisation is in fact imported with the techniques. The thesis of techniques autonomy in relation to society is becoming more and more doubtful
Receveur, Dominique. "Formation reconversion et système d'emploi : analyse de la relation emploi-formation : le cas d'une entreprise sidérurgique dans un bassin de monoindustrie". Nancy 2, 1990. http://www.theses.fr/1990NAN21022.
Texto completo da fonteBoth the place of training within social relations and the link between employment and training are examined through the analysis of a specific procedure for reconversion. This one started during the restructuring of an iron and steel company within a local employment system being mainly structured around this activity, i. E. In Neuves-Maisons (1984). Actually, the French mobility system regarding, the iron and steel industry represents a very good example of the crisis. Whenever the branch and the industrial plant want to dismiss members of the staff and in order to accompany this restructuring, an institutional device has been set up, being one of the institutional mechanisms which are intended to incite and accompany the forced mobility of the staff. The conversion training contract is an essential point for the institutional training. Regarding the employment analysis, supposing that applying for a job can be considered as a dominating role, the adoption of a system giving a certain outlook allows to reintroduce the interdependence of the employment system with other subsystems. It also allows to take into account strategies of main actors, procedures and logical aspects of socialization. If the training allows the acquisition of new social skills, it cannot be the deciding factor neither of a local development procedure, nor of an intervention on the factor looking for a job, nor of important modification of the segmentation procedures regarding the previously active population. It rinds its place within a broader system
Rivenet, Murielle. "Matériaux réfractaires basiques à projeter : caractérisation physico-chimique et stratégie d'optimisation". Lille 1, 1996. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/1996/50376-1996-370.pdf.
Texto completo da fonteA l'inverse la présence de dolomie limite nettement la corrosion. Sur la base de nos résultats des analyses sur matériaux projetés ont été réalisées. Outre la détermination du mécanisme de corrosion, elles ont permis de montrer l'existence d'une liaison silicophosphate plus riche en sodium et phosphore que celle observée dans les barrettes façonnées. Des synthèses au sein du système na2o-p2o5-cao-sio2 couplées à une approche structurale permettent de considérer les phases na2ca5(po4)4 et ca7(po4)2(sio4)2 comme les limites d'une unique solution solide de formule générale na2-xca5+x(po4)4-x(sio4)x. L'ensemble de ces conclusions a permis de bâtir une stratégie d'optimisation de la formulation des réfractaires basiques
Redonnet, Vincent. "Effets socio-economiques de la crise de 1982 sur l'industrie siderurgique a monclova (coahuila, mexique)". Toulouse 2, 1990. http://www.theses.fr/1990TOU20035.
Texto completo da fonteWe study the socioeconomics effects of the crise of 1982 on the iron and steel industry and the people of monclova (coah) mexico
Hafsaoui, Farouk. "Maitrise du transfert de technologie dans l'industrie algerienne : etude du complexe siderurgique d'el-hadjar". Lyon 2, 1989. http://www.theses.fr/1989LYO22005.
Texto completo da fonteThe choice of buying foreign technology in order to accelerate his industrialization has characterised the amgerian developement strategy. In order to explain the reasons of the actual discussion who tends to deny all relevance to this strategy, we have to analyze exhaustively the difficulties inherente to technology transfer, by examining the case of the industrial complex of el-hadjar. How corporate management has tried to resolve the problems of capacity underutilization, over costs due to insufficient maintenance ability and so on are the main preoccupations of this thesis
Ladeira, Garbaccio Grace. "Les aspects juridiques et économiques liés aux changements climatiques : l' étude de cas de la sidérurgie". Limoges, 2009. http://www.theses.fr/2009LIMO1004.
Texto completo da fonteNézosi, Gilles. "La fin de l'homme de fer : syndicalisme et crise de la sidérurgie à Longwy (1963-1993)". Grenoble 2, 1996. http://www.theses.fr/1996GRE21038.
Texto completo da fonteWilst longwy (meurte-et-moselle) and his region is often presented as a coherent and strong bastion of the working class, this thesis demonstrates a different reality. Through the monographical study of trades unions organisations in their "glory days" (the militantism of steel-workers against the barre ans fabius restructuring plans of 1978 ansd 1984), the analysis shows that this activism was in fact the last gasp efforts of an already seriously weakered groupe of steel-workers. Having studied the principal group of workers representatives (CGT/CFDT) over a thirty years period (1963-1993), we have attempted to identify the key period of decline (also through analysis of the 1967 strikes) as well as the trade union and proprietors reactions to the crisis (the constitution of the ideology of the profession : "the ideology of the man of steel")
Birba, Noaga. "La sidérurgie ancienne dans la province du Bam (Burkina Faso) : approches archéologique, archéométrique et ethno historique". Thesis, Paris 1, 2016. http://www.theses.fr/2016PA01H212.
Texto completo da fonteBurkina Faso, like other African countries, experienced a primary iron metallurgy millennia ago. In the current researches, the earliest date is around the eighth century BC, in the Bwamu at Douroula, in western Burkina Faso. In almost all regions of the country, vestiges relating to the former iron production are visible and are now tangible witnesses of knowledge and the ability of ancient metallurgists. Bam province, our study area is located in the region of north-central Burkina Faso and covers an area of 3931 km2. Our archaeological surveys have enabled to identify more than a hundred sites and remains resulting directly from the steel production. Ethno historical, archaeological and archaeometric investigations of these remains have elucidated the origins of the steel industry in this part of Burkina Faso and permitted to characterize the technical traditions that were used by the ancient metallurgists. Thus, five technical traditions have been identified and described (B1, B2, B3, B4, B5). They have been developed at different times. Besides the technical aspects, socio-cultural and economic implications caused by the local iron industry were apprehended to better understand the place occupied by the iron artisans in the traditional society of Bam province
Prin-Ferreira, Laurence. "Etude du comportement hydraulique d'une gehlénite synthétique et de l'élimination d'inclusions de chaux, en vue de la valorisation de deux sous-produits de la sidérurgie : les laitiers cristallisés et les scories issues du procédé Linz-Donawitz". Nancy 1, 2000. http://www.theses.fr/2000NAN10133.
Texto completo da fonteIn a first part, we studied the hydraulic reactivity of gehlenite, principal component of the crystallized slags, with the principal components of Portland cements, i. E. The silicates and the tricalcium aluminates and the dicalcium silicate, as well as with aluminates CA and C12A7. We showed the inertia of gehlenite when it is used alone and a low reactivity in the presence of the additions, mainly with C3S, where the formation of C4ACH11 confirms the surface hydraulic reactivity of gehlenite. Tests in basic environment confirmed that the increase in the alkalinity of the environment promotes the hydration of gehlenite. It is shown that the reactivity of gehlenite increases when it is crushed finely; there is then hydrated gehlenite formation C2ASH8. The mechanical performances of mortars containing crystallized slags (made up primarily of gehlenite) and cements such as the use of crystallized slags, when they are crushed finely, is possible. In one second part, our objective went on tests of neutralization of the quicklime present in slags of steel-works. It was noted that the addition of acid salts to slag is effective only at the time of th,e attack of the slags crushed by the acid solutions. The formation of the hydrates oflarnite [beta]C2S (portlandite and ettringite), allows the direct contact between acid salts and the lime which then is completely neutralized. Tests at high temperature were carried out on sintered pastilles, placed under conditions close to those of the converter. The results obtained by addition of 5 % of alumina-silica mixtures or fly ash showed that the free lime had completely disappeared to be trapped in the form of silicate and of aluminate. With the additives less rich in acid oxides, like the crystallized or granulated slags or aluminate C12A7, the capacity of inertage is limited
Rochette, Claude. "Images données de l'ouvrier lorrain pendant les Trente Glorieuses". Metz, 2007. http://docnum.univ-lorraine.fr/public/UPVM_T_2007_Rochette_Claude_LMZ0712.pdf.
Texto completo da fonteThis thesis brings to light, from different representations, the characteristics that contributed to drawing the portraits of the "Lorraine iron metallurgy worker" in the period known as "The Glorious Thirty". The measure of the differences between the images and statements of that time (1946-1975) and the present ones, established during the enquiry, is the basis of the analysis that helped set up a global comprehension of what is usually known as "Labor Culture", often issued from images built by the employer or union environments, or by the workers themselves. An ethnographic investigation on the male and female workers in the Moselle iron metallurgy and the analysis of their cinematographic, photographic and graphic representations shows the plurality of the stages, of the life experiences and of the labor cultures that nourish on them. After a presentation of the sources, of the analysis method, of the field, and of the social groups involved, one can see the circumstances of establishing labor sociability, during and after work, around machines and inside the teams. The presence of various discriminations is found with forms that are not issued only from hierarchic relations. The third part concerns the dangers run by the workers in the factory and the accidents of which the spectacularity contributes to build the image of the iron metallurgy worker as, at the same time, victim and valuable, and to also build the rigid image of a hard and dangerous work. Then the female iron metallurgy worker is given attention, as a forgotten figure of this heavy industry, which has a manly reputation and a masculine organization. She imposes herself by doing better than her male fellow-workers with jobs generally fit for men and with tasks for which the feminine attention and delicacy would be needed. The last part concerns the foreign workers and their reception by the metallurgic environment and the local populations. Reception often marked by racial and social discrimination. Beyond the recurrent images of the Italian immigrated iron metallurgy worker, this working figure is abandoned by the employers media instruments
Abdo, Diala. "Modélisation dynamique et supervision des fours de réchauffage continus de la siderurgie". Paris, ENMP, 2006. http://www.theses.fr/2006ENMP1408.
Texto completo da fonteThe work consists of dynamic modeling of continuous steel reheating furnaces and of the development of an on-line control logic. The first part presents the elaboration of a global dynamic model of a reheating furnace where only the energy equation and the continuity equation are applied through the use and the improvement of Thermette a software developed by the Centre for Energy and Processes (CEP). The model is valid for all types of furnaces thanks to the interface of SAFIR-4D a computational tool developed for Stein-Heurtey. Using this interface, the description of any furnace generates automatically the dynamic model after calculation of the radiative transfer factors of the said furnace. Transfer factors are calculated by the « Check » method, which allows fast calculation of radiative transfer factors developed in this thesis, coupled to MODRAY a software of the CEP. The numerical validation of the « Check » method allows to demonstrate its precision and its advantages in terms of significant savings of calculation time. The experimental validation, based on one instrumented slab circulating in a furnace, shows the consistency of the global dynamic model coupled to the radiative transfer factors obtained by the « Check » method. The calculated temperatures, mass flow rates of products and the thermal balance are in good agreement with measurements. The second part of the work covers the on-line supervision of a reheating furnace. The dynamic model developed in the first part is used as an analog of a real furnace and so provides data for the on-line operation of the furnace. The control development combines prevision and optimization algorithms. The fast and on-online prevision of the slab temperatures allows to obtain data necessary to the optimization, which function is to update the data sets of the furnace in order to verify the technical-economical criterion of production. The control is then validated by comparison between the results of tests and those obtained by a classical control with constant data sets. Results in terms of energy consumption and temperature criteria on various slabs are satisfactory
Raissouni, Baraka. "Mines et métallurgie anciennes en Franche-Comté : la sidérurgie dans le Jura (39) : Avant le haut fourneau". Besançon, 1995. http://www.theses.fr/1995BESA1011.
Texto completo da fonteHorikoshi, Koichi. "L'industrie du fer dans la Lorraine pré-moderne". Nancy 2, 1992. http://www.theses.fr/1992NAN21010.
Texto completo da fonteThe aim of the thesis is to grasp the iron production in Lorraine until 1630', that is to say, until the rupture of the Thirty Years' War. Above all, the author confirms that after the diffusion of the indirect process in the fifteenth century, the three humans factors - the lord, the ironmaster, the merchant - constitute the social and economic foundation on the iron industry. Particularly, the development in the second half of the sixteeth century consolidates this base. The lord supplies the raw materials (wood, ore, stream) and leases the forges to the ironmaster who manages them for the various terms. The latter is not a simple technical expert. He manages the whole of the establishment. The merchant participates also in the management of forges. The term of "marchand-maître de forges" indicates this new type of ironmaster who symbolizes the change of the iron industry in this period
Machot, Pierre. "L'industrie sidérurgique dans les Pyrénées occidentales (1803-1868)". Paris 1, 2000. http://www.theses.fr/2000PA010576.
Texto completo da fonteMatmati, Mohammed. "L'Apprentissage à la maîtrise technologique dans les pays en voie de développement : le cas de la sidérurgie algérienne". Grenoble 2, 1987. http://www.theses.fr/1987GRE21043.
Texto completo da fonteCONTROL OF TECHNOLOGY IN DEVELOPING COUNTRIES IS A SLOW PROCESS WHICH INVOLVES IMPLEMENTATION IF A GLOBAL STRATEGY EXTENDING FROM TECHNOLOGICAL DECISIONS FOR INDUSTRY TO THE SETTING UP OF TECHNOLOGICAL INSTRUMENTS OF REPRODUCTION. THERE IS ONE ESSENTIAL PHASE IN THIS PROCESS I. E. THE ONE CONCERNED with THE CONTROL OR RATHER, FUNCTIONAL CONTROL, OF THE MACHINERY USED FOR PRODUCTION. IT IS DURING THIS STAGE THAT BOTH INDIVIDUAL AND COLLECTIVE KNOW-HOW ARE ASSIMILATED BY THE WORK GROUP. WHEN DEALING WITH ANOMALIES IN THE PRODUCTION PROCESS (OU SI VOUS PREFEREZ : WHEN "MANAGING" DYSFUNCTIONING(?) IN THE PRODUCTION PROCESS). IN THE STEEL COMPLEX AT EL HADJAR THE STRATEGY FOR TECHNOLOGICAL CONTROL HAS STRESSED FOUR LEARNING ELEMENTS TRAINING, TECHNICAL ASSISTANCE, ORGANIZATION, MAINTENANCE. THE IMPLEMENTATION OF THIS STRATEGY HAS ENABLED THE WORKERS AT THE PLANT TO ACQUIRE A LEVEL OF TECHNOLOGICAL CONTROL WHICH HAS BEEN ASSESSED ON THE BAS IS OF THE EVOLUTION OF THE PRINCIPAL INDICATORS OF PRODUCTION OVER A FIVE-YEAR PERIOD. THIS STUDY (EVAUATION) DETECTED ASLIGHT, BUT NEVER THE LESS REAL, INCREASE IN PRODUCTION WHICH VARIED FROM ONE WORKSHOP TO ANOTHER AND WHICH WAS LOWER THAN LEARNING CURVES IN INDUSTRIALIZED COUNTRIES
Guessab, Slimane. "L'importance et la signification de l'absentéisme chez les ouvriers algériens : le cas de l'entreprise nationale de sidérurgie d'Oran". Bordeaux 2, 1986. http://www.theses.fr/1986BOR21005.
Texto completo da fonteGalloro, Piero-Dominique. "La main-d'oeuvre des usines sidérurgiques de Lorraine : 1880-1939 : étude des flux : l'exemple des Forges de Joeuf". Metz, 1996. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1996/Galloro.Piero_Dominique.LMZ9603_1.pdf.
Texto completo da fonteWith the help of documents from public archives (archives of the departements of Moselle and Meurthe-et-Moselle) and from the private collections of the companies wich have been studied (de Wendel's forges in Joeuf, metallurgic societies of Knutange, forges of the navy and of Homecourt, Chatillon-Commentry at Neuves-Maisons and the rolling mills of Thionville), the study was further supported by convincing elements thanks to both qualitative and quantitative research. Therefore, the use of such scientific tools as statistics, as well as the use of a powerful computer medium, contributed to the rigour and accuracy of the research. Rather than developping an argumentation with samples taken at random, the dissertation includes the entire population of workers from several factories during the closen period. No doubt can be cast on the representativeness of the sources used and knowledge about workers in the iron and steel industries grew richer as new elements were discovered. The demonstration aims at better understanding of the movements of the labour force wich passed in transit through the industrial factories of Moselle and Meurthe-et-Moselle, two French departements (administrative divisions) at a crossroads between southern and northern Europe. This study starts at the end of the 19th century, a major stage in the economic development of eastern France and of the iron and steel industry as a whole. It ends with the Second World War. Factory workers where analysed so as better follow and understand their spatiotemporal trajectories their behaviours in work teams and their professional evolution. Particular attention was paid to the question of the relations of the workers with the employers and to the intervention of the state
Chaskiel, Patrick. "Formes de l'expression syndicale : Pompey, 1977-1986". Grenoble 3, 1990. http://www.theses.fr/1990GRE39013.
Texto completo da fonteThis thesis analyses the conditions and forms of union expression inside the firms. This supposes the establishment of an approach of ideological relations and practices in particular social spaces. The fist part of the study deals with theories using the notion of corporate culture as a means of understanding what is often called the necessary social transformations. The second and third parts give details about several forms of union expression observed in an industrial compagny which closed down in 1986 : this expression appears in the shop council meetings, on leaflets, or in a local newspaper. Thus, firms are shown as being intermediate ideological spaces, half public and half private, organized in a social system which is dominated by a structural form and an ideological matrix
Afanga, Khalid. "Modélisation systémique des filières sidérurgiques en vue de leur optimisation énergétique et environnementale". Electronic Thesis or Diss., Université de Lorraine, 2014. http://docnum.univ-lorraine.fr/prive/DDOC_T_2014_0268_AFANGA.pdf.
Texto completo da fonteThis research study deals with mathematical modeling of the main steelmaking processes following a systems approach. The objective was to build a modeling tool of the whole steelmaking route devoted to its energetic and environmental optimization. We developed physical-chemical models for the blast furnace, the coke oven, the sintering plant and the basic oxygen furnace. These models were then linked together in a single flow sheet using the ASPEN Plus software. First, we focused on the top gas recycling blast furnace, a novel variant of the blast furnace in which the top gas is recycled and re-injected into the tuyeres after CO2 removal and capture. We tested both a reinjection at one level (tuyeres only) and at two levels (tuyeres and shaft). The results were successfully compared with experimental data from a pilot reactor and demonstrate that recycling can lower the blast furnace CO2 emissions by more than 20%. Recycling at two levels does not seem more efficient than at a single level. Second, we simulated the operation of an entire integrated steelmaking plant. Different configurations were tested, using a conventional blast furnace or a top gas recycling blast furnace, considering a possible recycling of the converter slag to the sintering plant, and studying the influence of Si content in the hot metal on the entire steelmaking plant operation. We show that it is possible to reduce the cost of producing steel by substituting and recycling various by-products
Atze, Émilie. "Étude des compétences sociales au cours du processus de négociation syndicale, approche située au sein d’une entreprise de sidérurgie". Thesis, Amiens, 2016. http://www.theses.fr/2016AMIE0004/document.
Texto completo da fonteThe NACRE (Negotiation and approach of relational competences in company) project, carried out in 2007, enabled to identify and formalize social skills with a tracking device. The present research is a continuation of this project. This study aims at redefining the notion of social skills, proposing a way to identify and to collect them in situ, understanding their connections with their context of apparition as well as better grasping their organization in the specific environment of labor-union negotiations. Social skills are revealed through this context which involves important issues and is sometimes conflicting. They are identifiable and can be noted through a methodological approach stemming from activity-oriented ergonomics. Furthermore, the evolutionary process of the negotiation, interactions, influences including alliance and opposition strategies between individuals as well as the prevailing atmosphere are variables conditioning the social skills implemented, the latter potentially impacting these various elements. This study accounts for the mechanisms of apparition of these skills as well as their various functions in the labor-union negotiation context. This research is part of a broader thought about the contribution of these skills to the social dialogue and enables to question both their recognition and valuation in negotiations and more generally at work. The thesis generates conceptual (on socials skills), methodological (on the way to identify and to produce them) as well as practical questions around the issues raised, particularly in link with negotiation
BOUZERAA, MOHAMED. "Maitrise des technologies et transfert de savoir-faire. Le cas du retour des travailleurs emigres algeriens dans deux secteurs d'activite". Lyon 2, 1988. http://www.theses.fr/1988LYO22012.
Texto completo da fonteIn most developing countries, industrial work processes essentially based on the utilization of imported technologies raise problems of technological mastery. Such a problematic state of affairs stems mainly from the industrial inexperience of the local workmanship as well as the lack of technological know-how and the required qualifications for the putting into practice of the skills acquired. Through an empirical approach of two sectorial studies (in the building heavy prefabrication and in the metallurgy of iron and steel), the present research is an attempt to reformulate the problem of the productive reinsertion of emigrant workers. It is an endeavour to assess what qualified emigrant workers can bring trough the capitalization mode of the know-how introduced, and, more specifically in the role of structuralization and the emergence of team workers
Nehme, Wassim. "Étude et modélisation de fours à gaz sidérurgiques en vue d’améliorer leur efficacité énergétique". Paris, ENMP, 2009. http://www.theses.fr/2009ENMP0001.
Texto completo da fonteGas industrial furnaces have an important potential for reducing energy consumption. To improve energy efficiency of furnaces, a modification of heat recovery system on the stake is required. Depending on the application, an optimal choice of burner type is required. The aim of the thesis is to quantify the effect of burner change on the heated product quality, energy efficiency, and furnace productivity. An experimental comparative study is performed for three types of industrial natural gas burners. The characterization was carried out in a 200 kW experimental cell. At different locations inside the cell in the burner plane, the flue gas composition (O2, CO2, CO, NO, NO2, NOx), the flue gas temperature, the total flux and the radiative flux are measured. The three types of burners are: a regenerative burner, a recuperative burner, and an self-regenerative burner. For each type of burner, different settings are tested by changing the wall temperature, the excess air ratio, the flame mode, the burner capacity, and the combustion air temperature. All measurements were corrected by modeling the measurement probes and using inverse methods. The adjusted measurements were used to validate the choice of the closer models for the resolution of turbulence, combustion, and radiative transfer equations. For each burner, the CFD calculations are compared to measured temperatures and flue gas compositions. Based on the validated CFD models, a generic method for flame representation is developed. In this method the flame is considered as the hot flue gases resulting from combustion. Then flame Emissive Volume Approach (EVA) consists in dividing the flame into concentric isothermal volumes. The method can better represent the flame in a dynamic furnace modeling on component network approach. Finally, a dynamic model of a tube reheating furnace is developed and a comparative study between the three types of burners is carried out. The comparison focuses on product quality, energy efficiency, and furnace productivity
Chi, Rifang. "Traitement en vue de leur protection contre l'oxydation d'électrodes de sidérurgie par les polyphosphates du système Al2O3-P2O5-Na2O-H2O". Lille 1, 1989. http://www.theses.fr/1989LIL10146.
Texto completo da fonteBrenneur, Pascal. "La sidérurgie lorraine et l'expérience de la C. E. C. A. (la Communauté Européenne du Charbon et de l'Acier) : 1950-1973". Nancy 2, 1997. http://www.theses.fr/1997NAN21026.
Texto completo da fonteThe history of the building of Europe starts from the setting-up of the European coal and steel community, the E. C. S. C. , founded by the treaty signed in Paris on April 18, 1951. From then on the iron and steel industry was brought to test the possibilities of economic co-operation between France, west-Germany, Belgium, Luxemburg, the Netherlands and Italy. Lorraine, the main region in France for the iron and steel industry, found itself in the front line; hence the interest of examining the changes induced by the first European community. Until then, the proximity of the steel and coal areas with Belgium, Luxemburg or Germany had generally been considered as a handicap. Indeed, the Schuman plan was going to give Lorraine a new chance. However, the chief executives of the steel industry in this region, as elsewhere in France, were hostile to the E. C. S. C. , even though they eventually accepted it. The Schuman plan imposed a new way of reasoning on both sides of the borders. So, the E. C. S. C. Can be given the credit for the reorganization of the steel companies since the early fifties, the reappraisal of the commercial strategies of the firms, the modernization of the transport system. The success of the E. C. S. C. Largely contributed to the continuation of the European venture
Mocellin, Julien. "Ressources secondaires de métaux, valorisation par voie hydrométallurgique de résidus de sidérurgie pour la valeur en zinc, en manganèse et plomb". Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0211/document.
Texto completo da fonteDuring the XIXth and XXth centuries, steel industry has been one of the main sources of wealth in France. However, ferromanganese manufacturing has produced huge quantities of wastes, for instance after blast-furnace gas washing. The residual sludge, containing high concentrations of zinc (Zn), manganese (Mn) and lead (Pb) (5 to 40 wt %), has been deposited in ponds, in the vicinity of steel-making plants. Since plant closure, these fields have been left untouched; some of them, like in Pompey (Lorraine) have been colonized by vegetation. These sites may be considered as a threat to health and environment and should be cleaned up. Nevertheless, with awareness of metal shortage, these ponds may be considered as deposits of secondary resources. This works aims at designing a hydrometallurgical process to extract Zn, Mn and Pb from these residues and recover them in a valuable form, while decontaminating the sites. At first, experiments have enabled us to determine the optimal conditions (acid concentration, duration, temperature, reactant addition, pulp density) to extract selectively Zn and Mn from the sludge and leave a Pb-rich residue. Then, Zn was recovered as ZnO or ZnS after precipitation or as Zn after electrowinning. Mn was recovered as MnCO3 at an acceptable purity. A technico-economic study has been done to assess the industrial interest of the process
Fabre, Jean-Marc. "Sidérurgie ancienne au Sahel : archéologie d'un district métallurgique de la fin de l'âge du Fer (Markoye, province de l'Oudalan, Burkina Faso)". Thesis, Toulouse 2, 2016. http://www.theses.fr/2016TOU20085/document.
Texto completo da fonteThe surveys carried out in the extreme north of Burkina Faso have led to the identification of more than 150 metallurgical sites.Two production periods have been distinguished, based on the type of slag-pit furnaces. During the first one (7th–10th c.), the production was probably restricted to the local market. During the second period (11th–13th c.), it multiplied by 25.Most of workstations are situated in the Beli River’s valley, in the North zone, but there are very tight links with settlements of the South zone, where the iconographic themes of rock engravings help to characterize the local population. It was a hybrid society, basically Sudanian with Berber influence and a Muslim varnish. The geographic distribution of a specific type of slag-pit furnace allows to locate its territory between the Niger River’s valley and the ancient springs of the Beli River.Arab-Muslim texts allude regularly to a limit of the Islam World at bilād al-Sūdān. It is argued that his symbolic boundary was situated south from Kukia / Bentia. It overlaps with geologic, climatic and cultural limits. Beyond is the world of animism, the land of gold and iron.Situated precisely in between those two worlds, this society could have been both a strategic and commercial go-between
Lomba, Cédric. "L'incertitude stratégique au quotidien : trajectoire d'entreprise et pratiques de travail : le cas de l'entreprise sidérurgique Cockerill Sambre, 1970-1998". Paris, EHESS, 2001. http://www.theses.fr/2001EHES0107.
Texto completo da fonteBordigoni, Mathieu. "Détermination du rôle de l'énergie dans la compétitivité de l'industrie manufacturière : Études économétriques et modélisation des interdépendances". Phd thesis, Ecole Nationale Supérieure des Mines de Paris, 2012. http://pastel.archives-ouvertes.fr/pastel-00803187.
Texto completo da fonteBerard, Emilie. "L’armure du XIIIe au XVIIe siècle en Europe : une approche matérielle. Production, nature et circulation du métal". Thesis, Cergy-Pontoise, 2019. http://www.theses.fr/2019CERG0986.
Texto completo da fonteThe project focuses on a specific object: armor. Between the 13th and early 17th centuries, war practices have undergone major changes, both on the technological level, as well as the organizational one. Accordingly, defensives arms were adapted to the new needs in order to protect their owners. Armor was also in some cases a mark of social distinction. Thus, at the end of the Middle Ages, armor was both an object for everyday military use, massively produced, and a luxury attire. Its fabrication was dominated by several prestigious European centers of production like Milan and Nuremberg and required specific technical skills to shape the metal.In order to shed light on some of the techniques and ancient skills, along with the circulation and exchanges in the European space, this project addresses the study of armor through its materiality, by implementing an archeometallurgical approach. A specific corpus of over a hundred artefacts was collected, characteristic of the evolution of the defensive equipment of the fighters but also of the great European centers of production. Physicochemical analysis of the metal can decipher its nature and reveal the technical skills of the craftsmen. Non metallic phases analysis has allowed to test hypotheses on the provenance of the materials employed.Overall, the results showed the use of alloys of varying nature, sometimes highly heterogeneous, to realize the plates of armor. However, on average the metal employed has a hardness close to a homogeneous steel with 0.4-0.5% carbon. Hardened alloys of high hardness remain very minor in the studied corpus. Specificities were nevertheless noted, such as the use of a specific material, combining several sheets of metal with different properties that could offer better defensive properties. The information acquired also allowed to study the workshop practices implemented by the armorers, whether for the manufacture of a complete set of armor, the mass production of "serial" pieces, or those originating from the same workshop. The results relating to the nature and hammering of the metal have led us to question the exact nature of the intervention of the master armorer who signed the artefact and the significance of the signature of a workshop
Maincent, Emmanuelle. "Plaintes antidumping, intégration verticale et cartellisation : l'exemple de l'industrie sidérurgique européenne". Paris, Institut d'études politiques, 1994. http://www.theses.fr/1994IEPP0034.
Texto completo da fonteThe aim of this thesis is to analyze how European steel producers, through antidumping actions and downstream vertical integration, have consolidated their dominant position during deregulation (1986-1990). The first part studies the impact of the ecsc treaty created market stability. It is the main reason why producers did not compete on price with fringe producers. The second part analyses market protection strategies. Using antidumping actions, steel producers impeded foreign exporters' progress in the market. Downstream vertical integration increased domestic firms' market shares and their foreclosure opportunities. The third part studies the effects of such a strategy. Producers have tried to protect and to foreclose the market in order to cartelise market. This hypothesis is confirmed by the impact of protection. Its impact is small on EC production, but is great on social welfare (with non homogeneous products). In the case of homogeneous products, protection has a positive impact on EC production. Greater its impact, greater the adjustments required in the medium term
Boukezzoula, Mostepha. "Mines et métallurgie ancienne dans le Centre-Est : la sidérurgie dans l'arrondissement de Mâcon et en Saône-et-Loire (71) : Avant le haut fourneau". Besançon, 1995. http://www.theses.fr/1995BESA1010.
Texto completo da fonteSoualhia, Zohra. "La conscience ouvrière chez les ouvriers d'origine rurale en Algérie : le cas des ouvriers du complexe sidérurgique d'El-Hadjar à Annaba". Toulouse 2, 1985. http://www.theses.fr/1985TOU20074.
Texto completo da fonteZanotelli, Cláudio Luiz. "Le pôle de Tubarão et l'expansion périphérique de l'agglomération de Vitória - Espírito Santo - Brésil". Paris 10, 1998. http://www.theses.fr/1998PA100035.
Texto completo da fonteGodelier, Éric. "De la stratégie locale à la stratégie globale : la formation d'une identité de groupe chez Usinor : 1948-1986". Paris, EHESS, 1995. http://www.theses.fr/1995EHES0015.
Texto completo da fonteHow is an industrial group born? Created in 1948 in order to build the first continuous rolling ill in france, Usinor (Union sidérurgique du nord de la France) has been pulled by the tremendous growth of the flat iron sheet market, itself following the increase of automobile and domestic equipment goods demands. Investment and modernization have been the principals means used to reach technical efficiency. Technical and commercial improvements were essentially concentrated on two renewed plants : Denain (nord) and Montataire (oise). After 1962, dunkerque has been lauched and sin ce has been continuously improved. The others plants, valenciennes (nord), anzin (nord), haumont (nord), louvroil (nord) were also modernized but more slowly. Most of them were producing long size items, like rails. In 1966, Usinor merged with lorraine-escaut. The new company had to face two major problems : to integrate several old plants from lorraine and to learn how to sell long size items on a large scae with completly different commercial technics. However, the managing team decide to preserve the light decentralized organization of the firm. We must wait till the 1970's crisis to see the development of a "staff and line" centralized structure. In the early 1970's, usinor's main competitor , sacilor, has been unable to finish the building of the huge plant of fos-sur-mer in the south east of france. The french government pressed Usinor to join the project and to finish it. Usinor did it, but reluctantly. Usino took that position because, in the same time, the company was finishing the extension of dunkerque plant. These two investments led to a major increase of usinor's indebtness. When the sales fell in the last days of 1974, usinor could no more pay its interst