Academic literature on the topic 'Miller (Firme)'
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Journal articles on the topic "Miller (Firme)"
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Gallegos-Vázquez, Clemente, Leia Scheinvar, Héctor Silos-Espino, Alma Delia Fuentes-Hernandez, Carlos A. Núñez-Colín, and Gabriel Olalde-Parra. "‘Invierno’, cultivar de xoconostle para la región central de México." Revista Mexicana de Ciencias Agrícolas, no. 7 (April 20, 2018): 1349–54. http://dx.doi.org/10.29312/remexca.v0i7.1122.
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Se describe una nueva forma hortícola del género Opuntia Miller, (Cactaceae), que se encuentra en el Municipio Villa de Tezontepec, Estado de Hidalgo, México, conocida como xononostle ‘Invierno’. Se evaluó de 2008 a 2010 y se encontró que sus cladodios maduros son anchamente elípticos, con 8 a 9 series de aréolas, con 3 a 4 espinas por areola; f lorece una vez por año y su madurez comercial la alcanza en el mes de abril del año siguiente del que ocurre la f loración. El fruto de ‘Invierno’ es de tamaño mediano (76.2 cm) y forma oboval, con la cicatriz floral ligeramente hundida, con epidermis brillante, verde clara con manchas rojo-anaranjadas, paredes color salmón, anchas (10.3 mm, característico de los xoconostles), ácidas (pH 4.3), funículos secos a semisecos e insípidos de color anaranjado, de consistencia firme, jugosidad media y bajo contenido de azúcares (4.4 °Brix) y con pocas semillas completamente desarrolladas (137). El rendimiento promedio en tres años de evaluación fue de 8 727 kg ha-1 y sus frutos permanecen por más de 15 meses en la planta, después de iniciada la maduración, lo que le confiere una ventaja comparativa con relación a las variedades de xoconostle Cuaresmeño y Manzano cultivadas en la región central de México. Ésta variedad está en proceso de validación bajo las condiciones de Villa Tezontepec, Hidalgo y Calera, Zacatecas a fin de establecer su adaptabilidad y potencial para incrementar el padrón varietal para la producción comercial de nopal en el Altiplano Semiárido de México.
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Zhdanov, Alexei. "Competitive Equilibrium with Debt." Journal of Financial and Quantitative Analysis 42, no. 3 (September 2007): 709–34. http://dx.doi.org/10.1017/s0022109000004154.
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AbstractThis paper studies the interaction among financing, entry, and exit decisions of firms in a competitive industry subject to aggregate uncertainty. In contrast to Fries, Miller, and Perraudin (1997), I do not assume that a firm in default leaves the industry immediately. The implications on the optimal leverage ratios and equilibrium credit spreads are discussed. By incorporating the effect of competition, I show that the model results in significantly higher credit spreads than those predicted by traditional single firm models. Dynamic capital structure strategies in a competitive industry are also examined. The model renders a number of empirical predictions regarding leverage ratios and credit spreads of firms in a competitive industry.
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Mahmud, Muhammad. "The Relationship between Economic Growth and Capital Structure of Listed Companies: Evidence of Japan, Malaysia, and Pakistan." Pakistan Development Review 42, no. 4II (December 1, 2003): 727–50. http://dx.doi.org/10.30541/v42i4iipp.727-750.
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Corporate enterprise is a natural outcome of capitalism in the course of economic development. The underwriter firms and banks etc. initially meet the capital requirements of such enterprise. Later on it is the stock exchange that carries out redistribution of shares of the enterprise. Corporate decisions on capital structure policy have long been a subject of debate and still remain an unresolved issue. The traditional view of capital structure was that it results in the weighted average cost of capital being U-shaped, which means that there exists as an optimal mix between debt and equity, at which point a firm’s value is maximised. However, Modigliani-Miller (1958), in a world of no tax and no financial distress, proved that capital structure is irrelevant to explaining firm values. When company taxes are considered, the benefits from tax shield leads Modigliani-Miller (1963) to conclude that the value maximising capital structure is extreme leverage. In a subsequent paper Miller (1977), by introducing both corporate tax and personal taxes into the model, points towards irrelevance of capital structure for any particular firm.
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Shemetov, Valery. "On Relation between No-Arbitrage Pricing Principle and Modigliani-Miller Propositions." ACRN Journal of Finance and Risk Perspectives 9, no. 1 (2020): 148–74. http://dx.doi.org/10.35944/jofrp.2020.9.1.012.
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An extension of Merton’s (1974) model (EMM) taking account of the firm’s payments and generating a new statistical distribution for the firm value is suggested. In an open log-value space, this distribution evolves from the initially normal to negatively skewed one. When payments are zero or proportional to the firm value, EMM turns into the Geometric Brownian model (GBM). We show that Modigliani-Miller Propositions (MMPs) and the no-arbitraging principle (NAP) result from the use of GBM with no payments. For a firm with payments, MMPs hold for short times and are false for time intervals exceeding a year. In contradiction with MMPs, the asset structure affects the firm value at the perfect market, and at the market with taxes, debt decreases the firm value even when there are no bankruptcy costs. NAP always holds for the entire market for short time deals. For long-term investments, the firm’s mean year returns decline in time intervals whose length depends on the firm’s initial conditions and its business environment. In these conditions, NAP does not hold for the whole market, but it temporarily holds for individual stocks as far as the mean year returns of the firms issuing them remain constant and fails when the mean year returns begin to decline.
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Rossato, Chiara, and Paola Castellani. "The contribution of digitalisation to business longevity from a competitiveness perspective." TQM Journal 32, no. 4 (May 12, 2020): 617–45. http://dx.doi.org/10.1108/tqm-02-2020-0032.
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PurposeThis paper aims to examine how long-lived firms can further develop through digitalisation in terms of actions, conditions and effects from a competitiveness perspective.Design/methodology/approachThis exploratory study follows an inductive approach based on a survey conducted via interviews undertaken with nine long-lived Italian firms. The dimensions of the model (command, continuity, community, connection), elaborated by Miller and Le Breton-Miller (2005) in relation to longevity factors, were chosen to analyse digitalisation’s contribution to these long-lived firms’ development.FindingsThe digitalisation implemented by the analysed firms contributed in a variety of ways: (1) improved the efficiency and effectiveness of their business processes, (2) enhanced the understanding of customer experience, (3) supported their craftsmanship and the transmission of the knowledge included in the entrepreneurial path, (4) increased the awareness of the cultural value of the firms’ heritage and (5) allowed for the development of cutting-edge design skills by experimenting with content on different digital platforms and devices.Practical implicationsThis study suggests managers of long-lived firms develop digital skills that allow them to interact with the rapid evolution of this context and understand how to effectively implement digitalisation in their specific firm. From this perspective, it is strategic to establish or strengthen collaborative network relationships to acquire such necessary skills.Originality/valueThis study provides novel empirical evidence on how long-lived firms are facing the challenge of digitalisation in terms of actions, conditions and effects to improve their competitiveness and ensure their survival.
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Gallegos-Vázquez, Clemente, Leia Scheinvar, Héctor Silos-Espino, Alma Delia Fuentes-Hernandez, César Ramiro Martínez- González, Gabriel Olalde-Parra, and Nicolás Alejandro Gallegos-Luevano. "‘Sainero’: nueva variedad de xoconostle para la región centro norte de México." Revista Mexicana de Ciencias Agrícolas 5, no. 6 (February 13, 2018): 1125. http://dx.doi.org/10.29312/remexca.v5i6.895.
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Desde el punto de vista cultural, los xoconostles han sido un factor importante de sustento económico del campesino de las zonas semiáridas de México, que los utiliza en la alimentación y la medicina tradicional. Lamentablemente, las nopaleras silvestres se encuentran sometidas a un proceso de destrucción acelerada e irreversible como consecuencia de la apertura de tierras destinadas al cultivo y al sobrepastoreo, entre otras causas. Se describe una nueva forma hortícola del género Opuntia Miller (Cactaceae), considerada como variedad de uso común, que se encuentra en el Municipio Saín alto, Zacatecas, México, conocida como xoconostle ‘Sainero’. Se evaluó de 2008 a 2010 y se encontró que sus cladodios maduros son de forma oboval ancha, con 11 a 13 series de aréolas, con 4 a 6 espinas por areola; florece una vez por año y su madurez comercial la alcanza en el mes de febrero del año siguiente del que ocurre la floración. El fruto de ‘Sainero’ es de tamaño pequeño a mediano (56 cm) y forma oboval ancha, con la cicatriz floral ligeramente hundida, con una coloración externa de coloración uniforme rojo medio, brillante, paredes rojizas a blancuzcas, anchas (11.4 mm, característico de los xoconostles), ácidas (pH 3.1), funículos secos a semisecos e insípidos de color rosa, de consistencia firme, bajo contenido de azúcares (6.3 °Brix) y con pocas semillas completamente desarrolladas (137). El rendimiento promedio en tres años de evaluación fue de 19.16 kg ha-1 y sus frutos permanecen por más de 12 meses en la planta, después de iniciada la maduración, lo que le confiere una ventaja comparativa con relación a otras variedades integradas a la producción comercial, como el Xoconostle Manzano (O. joconostle F. A. C. Weber) cultivado en la región central de México. Ésta variedad cuenta con el registro def initivo Número XOC-023-031111 del CNVV-SNICS y está en proceso de validación bajo las condiciones de Calera, Zacatecas, a fin de establecer su adaptabilidad y potencial para incrementar el padrón varietal para la producción comercial de nopal en la región semiárida del centro norte de México.
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Ghafoor Awan, Prof Dr Abdul, Prof Dr ZahirFaridi, and Abdullahi ShahbazAnwer Ghaz. "DETERMINENTS OF CAPITAL STRUCTURE: EVIDENCE FROM PAKISTAN SUGAR INDUSTRY." INTERNATIONAL JOURNAL OF MANAGEMENT & INFORMATION TECHNOLOGY 11, no. 2 (June 30, 2016): 2694–701. http://dx.doi.org/10.24297/ijmit.v11i2.4861.
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Capital structure is one of the most complex areas of financial decision making because of its inter-relationship with other financial decision variables. Poor capital structure decisions can result in a high cost of capital which decreases the value of a firm. Effective capital structure decisions decrease the cost of capital and hence the value of a firm increases. The objective of this empirical study is to analyze the factors affecting capital structure of sugar industry in Pakistan and to check whether the results confirm or not pecking order theory and trade-off theory. Different theories of capital structure have been reviewed like Modigliani and miller theory, trade-off theory, pecking order theory and market timing theory to make assumptions regarding capital structure of sugar firms. The findings are based on empirical results using panel data techniques for a sample of 30 firms listed on Karachi Stock Exchange from 2008-2011. The results show that tangibility is positively associated with leverage whereas size of the firm and liquidity are negatively associated with leverage. The results of profitability and growth opportunities are insignificant.
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Ramalingegowda, Santhosh, Chuan-San Wang, and Yong Yu. "The Role of Financial Reporting Quality in Mitigating the Constraining Effect of Dividend Policy on Investment Decisions." Accounting Review 88, no. 3 (January 1, 2013): 1007–39. http://dx.doi.org/10.2308/accr-50387.
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ABSTRACT Miller and Modigliani's (1961) dividend irrelevance theorem predicts that in perfect capital markets dividend policy should not affect investment decisions. Yet in imperfect markets, external funding constraints that stem from information asymmetry can force firms to forgo valuable investment projects in order to pay dividends. We find that high-quality financial reporting significantly mitigates the negative effect of dividends on investments, especially on R&D investments. Further, this mitigating role of financial reporting quality is particularly important among firms with a larger portion of firm value attributable to growth options. In addition, we show that the mitigating role of high-quality financial reporting is more pronounced among firms that have decreased dividends than among firms that have increased dividends. These results highlight the important role of financial reporting quality in mitigating the conflict between firms' investment and dividend decisions and thereby reducing the likelihood that firms forgo valuable investment projects in order to pay dividends. Data Availability: Data are available from public sources identified in the paper.
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Lahiri, Poulomi. "Dividend and Investment Decisions of Indian Corporate Firms Under Cash Flow Uncertainty." Jindal Journal of Business Research 8, no. 2 (June 9, 2019): 128–41. http://dx.doi.org/10.1177/2278682119846036.
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The Miller–Modigliani theory proposed that in perfect capital market, dividend and investment decisions are mutually separable, which is commonly known as the “separation principle.” On the basis of this theory, this article tries to investigate the dividend–investment relationship from a new perspective by introducing the cash flow uncertainty. This cash flow uncertainty is measured by cash flow shortfall and cash flow volatility. Using firm-specific data on relevant variables of the BSE-listed firms from 2001 to 2015, this article tries to explore the instruments which help to resolve cash flow uncertainty of the firm. Classifying firms into quintiles and dividing them into positive and negative shortfalls on the basis of both the measures of cash flow uncertainty, our main results show that firms mainly use external financing to resolve cash flow uncertainty. However, cash drawdown plays a trivial role in mitigating shortfalls. Moreover, applying the linear panel data estimation, the relationship between dividend and investment is explored for firms having a positive cash flow shortfall, using both measures of cash flow uncertainty. Our results reported that firm’s investment decision has no impact on dividend decision and vice versa. Hence, dividend and investment choices are made independently under cash flow uncertainty. Thus, our results support the “separation principle” under cash flow uncertainty.
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Stiglitz, Joseph E. "Why Financial Structure Matters." Journal of Economic Perspectives 2, no. 4 (November 1, 1988): 121–26. http://dx.doi.org/10.1257/jep.2.4.121.
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[This is a comment on “The Modigliani-Miller Propositions after Thirty Years” by Merton H. Miller in this same issue.] The 1958 paper by Franco Modigliani and Merton Miller has been justly hailed as a landmark in the modern theory of finance. What has not been sufficiently emphasized is the importance of the paper to the development of economic theory and practice. Indeed, it is ironic that a paper which purportedly established that one need not pay any attention to financial structure -- that financial structure was irrelevant -- should have focused economists' attention on finance. Again ironically, some of the most productive responses to the MM results have come from those who did not feel able to accept the conclusion that financial policy is irrelevant. The MM results forced these skeptics to identify which of the assumptions underlying the MM theorem should be modified or rejected. The attention of economists during the past 30 years has focused on four assumptions underlying the model: first, that firms can be identified by “risk class”; second, that individual borrowing can substitute for firm borrowing; third, that investors have full information about the returns of the firm; and fourth -- the importance of which MM themselves recognized -- is that there are no taxes, or at least tax policy does not treat debt and equity differentially. The question has been not so much whether these assumptions are “realistic,” but whether, or under what circumstances, altering these assumptions leads to situations where financial structure does indeed matter.
Dissertations / Theses on the topic "Miller (Firme)"
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Miller-Phillips, Lisa [Verfasser], and Volker [Akademischer Betreuer] Heinemann. "Molekulare Prädiktion des Ansprechens auf Cetuximab im Rahmen der FIRE-3 Studie : Untersuchungen am EGFR („Epidermal Growth Factor Receptor")-Signaltransduktionsweg / Lisa Miller-Phillips ; Betreuer: Volker Heinemann." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2019. http://d-nb.info/1190563681/34.
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Hurdebourcq, Philippe. "L'innovation institutionnelle territoriale au service du développement économique : tentative de modélisation." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM1103/document.
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Depuis la fin du système fordiste, de nombreux chercheurs ont étudié pourquoi des territoires français parvenaient à surmonter les crises systémiques auxquels ils étaient soumis et d’autres non. Paradoxalement, alors que tous évoluaient dans des contextes économique, social et institutionnel comparables, ils ont montré que la résilience de certains résultait directement de facteurs endogènes. Le local, loin d’être absorbé par la mondialisation, est au contraire apparu comme un rempart à l’uniformisation et un facteur de compétitivité pour les firmes. Cependant, l’approche méso économique qui sous-tend ces analyses suppose que le territoire soit à même d’initier une dynamique de coordination de ses agents, qu’ils appartiennent aux sphères publiques comme privées, et puisse les inciter à intégrer des démarches collaboratives. Or ces principes vertueux, créateurs de valeurs pour les firmes et porteurs de cohésion pour les territoires, ne peuvent se concrétiser sans que les individus, dirigeants de firmes, responsables institutionnels et leurs collaborateurs ne fassent leurs de ces principes et acceptent d’y affecter du temps et des moyens.Toutefois, notre expérience montre une relative ignorance de la part des agents susceptibles d’être concernés. Les enjeux et contraintes de chacun tendent au contraire à s’y opposer. C’est pourquoi notre recherche, basée sur des témoignages approfondis des principaux acteurs locaux, vise à proposer des clés assurant la déclinaison de ces concepts méso à la réalité microéconomique des territoires, afin de leur permettre d’appliquer et de bénéficier concrètement des grands principes de l’économie territorialeSince the end of the Fordist system, numerous researchers have researched the reasons for which some French territories managed to overcome the systemic crises to which they were subject whereas others did not. Paradoxically, whereas all of them developed within similar economic, social and institutional contexts, they have shown that the resilience of some resulted directly from endogenous factors. Local [characteristics], far from being absorbed by globalisation, have on the contrary appeared as a defence against the trend towards uniformity and a factor in competitiveness for firms. However, the meso economic approach underlying these analyses assumes that the territory can itself initiate a dynamic of coordination by its agents, whether they belong to the public or the private sphere, and can encourage them to integrate collaborative policies. However, these virtuous principles, creating value for firms and bringing cohesion to the territories themselves, cannot become effective unless individuals, business leaders, institutional managers and their staff accept these principles and agree to devote time and resources to them.However, our experience demonstrates relative ignorance on the part of actors liable to be concerned. The challenges and constraints relating to each tend, on the contrary, to be a barrier. That is why our research, based on in-depth testimony collected from the principal local actors aims to offer keys for ensuring the application of these meso concepts to the micro economic reality of these territories, with the aim of enabling them to apply and to benefit in concrete terms from the main principles of the territorial economy
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Roselló, Prados Gemma. "Characterization and improvement of plant-associated Lactobacillus plantarum. Novel biocontrol agent for fire blight disease." Doctoral thesis, Universitat de Girona, 2016. http://hdl.handle.net/10803/403404.
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Fire blight is a disease caused by Erwinia amylovora. For the limited effectiveness of copper products and the new regulations for the sustainable use of pesticides, biological control is considered a good alternative for the control of fire blight. Therefore, this thesis focuses on the research of lactic acid bacteria strains as biocontrol agents of fire blight. Three out of one hundred strains, which were identified as Lactobacillus plantarum TC54, TC92 and PM411, were selected by their ability to inhibit E. amylovora infections in different performed assays. A multivariate statistical analysis, combining different phenotypic and genotypic properties, determined that strains TC92 and PM411 were good candidates as biocontrol agents. Finally, the combination of lactic acid and strains TC92 and PM411 was used to increase the biocontrol efficacy and reliability in the biocontrol of fire blightEl foc bacterià és una malaltia causada pel bacteri Erwinia amylovora. L’eficàcia limitada dels productes cúprics i les noves normatives d’ús sostenible dels productes fitosanitaris, fan que el control biològic es consideri una bona alternativa en el control d’aquesta malaltia. Aquesta tesi es centra en la recerca de soques de bacteris de l’àcid làctic com a agents de biocontrol del foc bacterià. Tenint en compte la seva eficàcia en el control de les infeccions causades per E. amylovora en diferents assajos realitzats es van seleccionar 3 soques de 100 inicials, identificades com a Lactobacillus plantarum TC54, TC92 i PM411. Un anàlisi estadístic multivariant, combinant diferents propietats genotípiques i fenotípiques, va confirmar que les soques TC92 i PM411 eren bones candidates a agents de biocontrol. Finalment, per incrementar la seva eficàcia i fiabilitat en el control del foc bacterià, es va utilitzar la combinació d’àcid làctic i les dues soques seleccionades
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Dong, Huy Quang. "Evaluation du risque d'inflammation des fumées riches dans un milieu confiné sous-ventilé à l'aide de la simulation numérique." Phd thesis, ISAE-ENSMA Ecole Nationale Supérieure de Mécanique et d'Aérotechique - Poitiers, 2013. http://tel.archives-ouvertes.fr/tel-00954471.
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Un des objectifs a consisté à développer une étude systématique des caractéristiques d'allumage, depropagation et de combustion massique de combustibles liquides. La ré-inflammation des fumées riches estplus spécialement pris en compte. La recherche porte essentiellement sur les propriétés des feux dans uneenceinte avec ventilation contrôlée, sous ventilée. Les facteurs dominants à la ré-inflammation des fuméesriches est la quantité minimale d'hydrocarbures totaux et la température. Grâce à la Simulation Numériquedes Grandes Echelles, nous sommes allés à un niveau de détail permettant de prendre en compte l'influencede la ventilation sur la propagation de la flamme en milieu confiné. Les modèles numériques permet deprévoir les aspects aussi bien chimiques de la combustion (pyrolyse du combustible liquide, réaction dans laflamme), que thermodynamiques (transfert de chaleur et de masse flamme-liquide). L'enjeu est de concevoirun modèle de feu encore plus général, capable de traiter aussi les feux à grande échelle. Ce type de modèleest consacré à la mise en équations du problème et à la faisabilité d'une simulation numérique complexe.Les résultats obtenus sur les feux sur-ventilés sont en accord avec les résultats expérimentaux. Outre lesdifficultés théoriques de ce type de problème, il faut ajouter les difficultés pratiques liées à la durée trèsimportante des simulations sur ordinateur, et le coût de calcul élevé.
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Potin-Gautier, Martine. "Photoamidation d'olefines fluorees, en milieu homogene et en milieux microemulsions non aqueux." Toulouse 3, 1987. http://www.theses.fr/1987TOU30011.
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Les amides perfluores et mixtes (a doubles chaines hydrogenee et perfluoree) sont des precurseurs de tensioactifs susceptibles d'ameliorer les proprietes des mousses extinctrices, par diminution de la tension interfaciale entre l'eau et l'huile par un meilleur etalement de la mousse. Ces amides sont synthetises par photoamidation d'olefines : r::(f)-ch=ch::(2), r::(f)-ch=ch-r::(h), r::(f)-ch::(2)-ch=ch-r::(h) dans le t-butanol et dans des microemulsions de formamide
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Abid, Habib. "Conception d'une carte de l'environnement en milieu rural méditerranéen : application au Tell tunisien." Grenoble 1, 1993. http://www.theses.fr/1993GRE10128.
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L'objectif de cette etude est de mettre en relief l'importance des activites humaines et des facteurs ecologiques dans le faconnement des paysages mediterraneens, de definir une nouvelle methode d'etude et d'analyse des milieux ruraux et de contribuer a l'elaboration d'une carte de l'environnement. L'originalite de ce travail reside en: l'etude de la vegetation potentielle du haut tell tunisien et sa classification par etage et serie de vegetation; la representation simultanee sur une meme carte de la vegetation potentielle et de la vegetation actuelle; l'etude des risques d'incendie des forets en l'absence de tout essai de ce genre en tunisie; la conception d'une carte synthetique de l'environnement rural et sub-urbain. En conclusion, l'etude a pu montrer la contribution de la biologie vegetale et du forestier a une carte de l'environnement et par la suite d'autres equipes (agronomes, urbanistes,. . . ) peuvent faire des cheminements analogues et alors seulement pouvait venir une synthese generale de tous les aspects de l'environnement
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Becerra, Barrios Patricio Raul. "Contributions expérimentales sur l'écoulement au passage d'une ouverture horizontale en convection naturelle : application au désenfumage naturel des bâtiments." Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0257.
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Ce travail de recherche porte sur l’étude de l'écoulement d'échange naturel à travers un évent horizontal situé au plafond d'une enceinte munie d'une ouverture verticale en partie basse. Cet échange est contrôlé à la fois par les effets de flottabilité, dus à une différence de température entre le fluide contenu dans le compartiment et l’extérieur, et par le taux de confinement du compartiment, exprimé par le rapport entre la section d'admission d'air en partie basse aB et celle de l’évent aT. L'écoulement à travers l’évent présente deux régimes caractéristiques, monodirectionnel et bidirectionnel, suivant le rapport des sections des ouvertures. Une étude expérimentale à échelle réduite est conduite en se focalisant sur la problématique du remplissage et de la vidange simultanés d’un local ventilé naturellement avec une source de flottabilité. L’objectif est de caractériser la transition et de faire le lien entre ces deux régimes. D'abord, la zone de transition est déterminée à partir de l’analyse de signaux de température recueillis au sein de l’évent couplée à des observations par nappe laser. Les résultats en régime thermique établi délimitent la zone de transition dans une plage(aB / aT) crit ∈ [0.09, 0.18]. Ensuite, les écoulements au niveau de l’évent sont caractérisés grâce à la technique de vélocimétrie par imagerie de particules stéréoscopique (SPIV, par ses sigles en anglais) sur une large plage du rapport des sections des ouvertures. Sur la base des débits mesurés par SPIV, une modélisation du débit est proposée afin de faire le raccordement entre un régime bidirectionnel pour une condition de confinement (aB / aT = 0) et un régime monodirectionnelThis work focuses on the study of the natural exchange flow through a horizontal vent located on the ceiling of an enclosure with a vertical opening at low-level. This exchange flow is controlled by both the buoyancy effects, due to a temperature difference between the fluid contained in the compartment and the outside, and the containment rate of the compartment, expressed by the ratio of the opening areas, aB in the lower part and aT at the vent. The flow through the vent has two characteristic regimes, unidirectional and bidirectional, depending on the ratio of the opening areas. A small-scale experimental study is conducted focusing on the problem of simultaneous filling and emptying of a naturally ventilated room subject to a source of buoyancy. The purpose is to characterize the transition and to make the link between these two regimes. First, the transition zone between the two types of flow is determined from the analysis of temperature signals collected within the horizontal opening coupled with laser observations. The established thermal results delineate the transition zone in a range of (aB / aT)crit ∈ [0.09,0.18]. Then, the vent flows are characterized using the stereo particle image velocimetry technique (SPIV) over a wide range of the ratio of the opening areas. Based on the flows measured by SPIV, a flow modelling at the vent is proposed to make the connection between a bidirectional regime for a confined condition (aB / aT = 0) and a unidirectional regime
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Biasi, Valentin. "Modélisation thermique de la dégradation d’un matériau composite soumis au feu." Thesis, Toulouse, ISAE, 2014. http://www.theses.fr/2014ESAE0034/document.
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L’utilisation des matériaux composites devient de plus en plus importante dans les structures aéronautiques de nouvelle génération. Le gain de masse engendré, et donc de carburant, pousse les constructeurs aéronautiques à les employer de façon optimale. Néanmoins, ces matériaux se dégradent rapidement lorsqu’ils sont soumis à des flux de chaleur importants, entraînant une perte de leur résistance mécanique. Ce problème peut être dramatique pour la sécurité des passagers car la tenue de ces nouvelles structures peut ne plus être assurée dans le cas d’un incendie. Les méthodes actuelles de certification de la tenue au feu des matériaux composites aéronautiques reposent principalement sur l’utilisation de moyens expérimentaux, dont les résultats ne sont représentatifs que des conditions particulières dans lesquelles les essais ont été réalisés. La compréhension des différents phénomènes thermiques, chimiques et mécaniques intervenant lors de la dégradation de ces matériaux, avec l’appui de simulations numériques et d’expériences, peut permettre d’améliorer les méthodes existantes et donc d’optimiser les futures structures aéronautiques dès la phase de conception.Cette étude s’est attachée à développer et valider un modèle thermo-chimique de dégradation des matériaux composites multi-dimensionnel et multi-constituants. Ce modèle permet de traiter des cinétiques de dégradation complexes suivant plusieurs réactions de décompositions et de prendre en compte le transport des gaz produits depuis leur formation jusqu’à leur évacuation hors du matériau. L’utilisation de lois d’homogénéisation avancées est proposée afin de rendre compte des effets des transformations sur les transferts de chaleur et de masse se produisant au sein du matériau. L’application du modèle thermo-chimique à un cas de dégradation sous flux thermique connu mais non-uniforme dans un environnement contrôlé permet de confronter les résultats de simulation aux mesures expérimentales et ainsi de valider l’approche multi-constituants adoptée. Enfin, l’étude numérique de la dégradation d’un composite soumis à une flamme met en avant l’effet des gaz de décomposition éjectés à l’interface sur le flux thermique pariétal échangéComposite materials are increasingly used in new generation aircraft structures. Mass and as a consequence fuel savingsencourage aircraft manufacturers to use them optimally. However, these materials can degrade quickly when exposed tosignificant heat fluxes, resulting in a loss of mechanical strength. This problem can be dramatic for passenger safety asmechanical resistance of such innovative structures can not be ensured in case of fire events. Current certification methodsof fire resistance of aeronautical composite materials are mainly based on experiments, that are only representative of thespecific conditions under which they were carried out. The understanding of thermal, chemical and mechanical phenomenaoccurring during the decomposition of these materials, with the support of numerical simulations and experiments, can helpimproving existing methods and optimizing the future aeronautical structures from the design chain. This study deals withthe development and validation of a multi-components and multi-dimensional thermo-chemical model of decomposing compositematerials. It can deal with complex degradations following several decomposition reactions as well as transport ofpyrolysis gases from their formation up to their ejection out of the material. The use of advanced homogenization laws isproposed to account for the chemical transformations on heat and mass transfers occurring in the material. The applicationof the thermo-chemical model to a laser degradation study under known but non-uniform heat flux in a controlled environmentallows to confront the simulation results with experimental measurements and thus validate the multi-componentsapproach. Finally, the numerical analysis of a decomposing composite material submitted to a flame highlights the effectof emitted decomposition gases on the exchanged parietal heat flux
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Vopat, Daniel. "Vztah mezi výkonností a kapitálovou strukturou: Empirická studie českých zpracovatelských firem." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-347598.
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The thesis examines the relationship between performance (measured by return on assets, return on equity and profit margin) and capital structure (measured by indebtedness) in Czech manufacturing companies and how this relationship has changed with respect to the world financial crisis. In order to address the issue of heterogeneous sectors present in manufacturing industry and to provide a universally applicable conclusion, the key variables were transformed according to the percentile rank within a given manufacturing sector in a given year. The general conclusion is that the examined relationship is not the same for all levels of indebtedness. The relationship is positive until it reaches a certain level of indebtedness and above this threshold the relationship is negative. This threshold differs across different industry sectors, time and with the usage of different performance measures. The only exception is a model using time period before the financial crisis and profit margin as a performance measure, which predicts the relationship to be negative for all levels of indebtedness. Regarding the development of the examined relationship over time, the optimal indebtedness decreased during and after the financial crisis when the performance was measured by return on assets or return on equity....
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Gagnon, Marie-Ève. "Une analyse en milieu de travail : Étude de cas d'une firme de sondage." Thèse, 2005. http://hdl.handle.net/1866/2181.
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[français]
L’objectif de cette recherche est d’analyser l’organisation interne d’une firme de sondage sous l’angle des sphères du milieu de travail telles qu’identifiées par Bélanger, Giles et Murray (2004), soient : la gestion de la production, l’organisation du travail et la relation à l’emploi. Plus spécifiquement, nous chercherons à savoir comment se comporte la firme enquêtée face à la gestion de la flexibilité organisationnelle et quel est l’impact de celle-ci sur les trois sphères du travail.
L’analyse utilise la méthodologie de l’étude de cas et fait appel à divers types de matériaux : des observations ponctuelles, des entrevues informelles et les bases de données administratives ainsi que les rapports d’évaluation des entrevues téléphoniques effectuées par les intervieweurs. De même, l’analyse des résultats utilise à la fois des méthodes plus classiques telles que les corrélations ainsi que des représentations graphiques et des analyses qualitatives.
L’analyse permet de repérer une logique de fonctionnement à l’œuvre dans les différentes sphères de l’emploi : l’importante standardisation des processus de travail (dans le champ de la gestion de la production), la réduction des marges de manœuvre (dans le champ de l’organisation du travail) et la non reconnaissance de l’expertise des intervieweurs (dans le champ de la relation à l’emploi). Les contradictions repérées dans l’analyse, entre les sphères de l’emploi et les objectifs de flexibilité, montrent que les structures mises en place bloquent, dans une certaine mesure, la capacité d’initiative et d’adaptation que la flexibilité exige. La recherche a montré que ce qu’on demande aux intervieweurs est à la fois le reflet des exigences de la flexibilité, tel que constaté dans ce mémoire, mais aussi, des exigences sociales face à la méthodologie de sondage. Tout porte à déduire que celles-ci peuvent engendrer un plafonnement de la performance des employés.
Mots-clés : centres d’appels, intervieweurs, firmes de sondage, flexibilité organisationnelle, gestion de la production, organisation du travail, relation à l’emploi, travail émotionnel.[english] The objective of this study is to analyze the internal organization of a polling firm from the perspective of workplace spheres, as identified by Bélanger, Giles and Murray (2004): production management, work organization and employment relations. More specifically, we sought to discover how the studied firm behaved in terms of managing organizational flexibility and its impact on the three aforementioned spheres. The analysis uses case-study methodology and calls upon various types of material: point source observations, informal interviews, as well as administrative databases and assessment reports of telephone interviews carried out by interviewers. In addition, the analysis employs both classical methods such as correlations, as well as graphical representations and qualitative analyses. The analysis traces an operational logic from the point of view of the different spheres: the significant standardization of the work process (in the sphere of production management), the reduction of flexibility (in the sphere of work organization), and the non-recognition of interviewer expertise (in the sphere of employment relations). The contradictions revealed by the analysis between the spheres of work and the goals of flexibility demonstrate that the structures currently in place block, to a certain extent, the capacities for initiative and adaptation required by flexibility. The research demonstrates that what is asked of interviewers is both a reflection of the requirements of flexibility, as seen in this thesis, but also of social requirements related to survey methodology. All of which points to the conclusion that these requirements can lead to a leveling off of employee performance. Key words: call centers, interviewers, polling firms, organizational flexibility, production management, work organization, work relations, emotional labor.
CRSH
Books on the topic "Miller (Firme)"
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Herman Miller: Classic furniture and system designs for the working environment. London: Thames & Hudson, 2005.
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Modili͡ai͡ani, Franko. Skoli͡ako stoit firma : Teorema MM / Franko Modili͡ai͡ani, M. Miller. Moskva: Delo, 1999.
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1867-1938, Smith Solar Josué, ed. Smith Solar & Smith Miller arquitectos. Providencia [Santiago, Chile]: Ediciones Universidad Finis Terrae, 2011.
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(Firm), Herman Miller. The Herman Miller collection: The 1955/1956 catalog. Atglen, PA: Schiffer Pub, 1998.
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Miller/Hull: Architects of the Pacific Northwest. New York: Princeton Architectural Press, 2001.
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Coombs, Matthew. Aprilia RSV Mille service and repair manual. Sparkford: Haynes, 2005.
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(Firm), Adam Miller. Adam Miller's catalogue of school books, stationery &c., &c., &c. Toronto: [s.n.], 1994.
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Dixon, Jay. Fantasy unlimited: The world of Mills and Boon. London: Women's Review Ltd, 1987.
Find full textBook chapters on the topic "Miller (Firme)"
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Chang, Kuo-Ping. "A Reconsideration of the Modigliani-Miller Propositions." In The Ownership of the Firm, Corporate Finance, and Derivatives, 17–22. Singapore: Springer Singapore, 2015. http://dx.doi.org/10.1007/978-981-287-353-8_3.
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Simone, Carla. "The Firm as a Knowledge-Creating Milieu: The Role of the ICT." In Knowledge-creating Milieus in Europe, 59–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-642-45173-7_4.
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González-Cruz, Tomás F., and Norat Roig-Tierno. "Which Competitive Strategy Fits Better to Different Family-Business Profiles?" In Advances in Business Strategy and Competitive Advantage, 127–46. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1655-3.ch005.
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This chapter belongs to the vein of research that analyses family firms from a configurational approach. This survey explores which combination of competitive strategy, environmental turbulence, family complexity, and family firm management and governance arrangements are present when firm performance is present. This research follows Le Breton-Miller and Miller's call to gain a better understanding of the interaction between competitive strategy, environmental conditions, and family firm features. Literature reports controversial results with regard to family-business strategic preferences and firm performance, and recent research shows that this relationship needs considering both industry and family context. This chapter analyses a sample of 129 Spanish SME-Family-Business that belong to the tourism industry. Using fuzzy-set qualitative comparative analysis, the authors find seven configurations to firm performance presence and one recipe for performance absence.
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González-Cruz, Tomás F., and Norat Roig-Tierno. "Which Competitive Strategy Fits Better to Different Family-Business Profiles?" In Research Anthology on Strategies for Maintaining Successful Family Firms, 27–46. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-3550-2.ch002.
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This chapter belongs to the vein of research that analyses family firms from a configurational approach. This survey explores which combination of competitive strategy, environmental turbulence, family complexity, and family firm management and governance arrangements are present when firm performance is present. This research follows Le Breton-Miller and Miller's call to gain a better understanding of the interaction between competitive strategy, environmental conditions, and family firm features. Literature reports controversial results with regard to family-business strategic preferences and firm performance, and recent research shows that this relationship needs considering both industry and family context. This chapter analyses a sample of 129 Spanish SME-Family-Business that belong to the tourism industry. Using fuzzy-set qualitative comparative analysis, the authors find seven configurations to firm performance presence and one recipe for performance absence.
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"Introduction: The Women of Millet Mountain." In Walking on Fire, 1–22. Cornell University Press, 2017. http://dx.doi.org/10.7591/9780801469862-004.
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Minchin, Timothy J. "A New President and a New Decade." In Labor Under Fire. University of North Carolina Press, 2017. http://dx.doi.org/10.5149/northcarolina/9781469632988.003.0003.
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This chapter surveys the early period of the Kirkland presidency, from when he took office in November 1979 through to the summer of 1981. It explores Kirkland’s character and personality in unprecedented detail. It shows how Kirkland – and the AFL-CIO – enjoyed a brief honeymoon in the closing days of the Carter administration. Kirkland undertook some important reforms e.g. he placed the first woman (Joyce Miller) on the AFL-CIO’s Executive Council. Two events – the 1980 election and the 1981 air traffic controllers’ strike – transformed the political climate, placing the AFL-CIO on the defensive, or “under fire.” Kirkland’s presidency was thrown into crisis, his leadership questioned. It was the start of a new era, one in which the AFL-CIO operated in a hostile economic and political climate. For Kirkland, the turnaround was a shock, and he struggled - at least initially - to respond. His leadership was questioned by the press, especially after the 1980 election, which saw Ronald Reagan elected comprehensively, receiving many blue-collar votes in the process.
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Gould, Graeme Paul. "The Application of Proof and Simultaneous Equations in Valuation." In Theoretical and Applied Mathematics in International Business, 119–35. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-8458-2.ch007.
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The purpose of this chapter is to demonstrate how the notion of “proof” can be used to resolve issues of valuation in finance and how the method of simultaneous equations can be applied to determine the value of shares in two firms that hold an investment of shares in one another at the same time. The reader will be introduced to the notion of proof by arbitrage as it is was first pioneered in modern finance by Modigliani and Miller and then its application in providing guidance to practitioners of valuation will be explored.
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Steketee, Gail, and Randy O. Frost. "Enhancing Motivation." In Treatment for Hoarding Disorder, 64–81. Oxford University Press, 2013. http://dx.doi.org/10.1093/med:psych/9780199334964.003.0005.
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Chapter 5 briefly discusses insight and motivation problems, and guides clinicians through the use of motivational enhancement methods with clients who experience and display ambivalence about working on their hoarding and acquiring problems. Clinicians begin with a detailed discussion of clients’ personal values and goals to provide a firm foundation. Following Miller and Rollnick’s work on motivational interviewing, basic assumptions of this approach are described. The chapter describes a variety of specific strategies to help clients resolve ambivalence whenever this occurs during the therapy process.
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Whitehead, Kevin. "Bands of Brothers 1941–1948." In Play the Way You Feel, 71–96. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190847579.003.0003.
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Several jazz films made just before, after, or during World War II draw or suggest parallels between jazz bands and military units. Some jazz bands benefit from a strong sense of mutual support and commitment to the greater good, as in Blues in the Night. Bands in others movies are challenged by wartime problems: sabotage, mutiny within the ranks, and personality clashes among the leadership (in films involving, respectively, Glenn Miller, Benny Goodman, and Jimmy and Tommy Dorsey). Two films by director Howard Hawks are examined, Ball of Fire and its remake A Song Is Born, focusing on the latter’s (mis)use of critic Winthrop Sargeant’s analytical work Jazz: Hot and Hybrid. Other films are also discussed.
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Ross, Andrew. "The Battle for Downtown." In Bird on Fire. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199828265.003.0009.
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Before the financial crash froze the motion of money, the plan to repopulate thinned-out downtowns had become an article of faith among advocates of low-carbon urbanism. Where else could the blueprint for truly sustainable living be realized? The technical difficulty and cost of retrofitting suburbs for higher density was prohibitive, even in the postwar inner-ring subdivisions that were more compact in their land use than today’s sprawl counterparts on the urban fringe. It was in city centers that the biggest improvements in energy efficiencies and emissions could be achieved, and, since the carbon clock was ticking, there was a consensus that their repopulation by middle-class residents ought to be accomplished posthaste. Urbanists, guided unerringly by Jane Jacobs’s prescriptions for vibrant street life, had long argued that the kind of society fostered by mixed-use and mixed-income downtown neighborhoods was more open-minded and mutually gratifying than the atomized lifestyle of the master-planned exurban community. After all, Jacobs’s version of the city had been driven primarily by concerns about quality of life, or what could be called cultural health. In her view, those who had planned the urban renewal projects of the 1950s and 1960s and hastened the population flight outwards had bequeathed a soulless, antiurban city—“a Great Blight of Dullness,” as she memorably put it. Hence, her full-throated praise for the daily festival of street life in mixed-use neighborhoods, even those condemned by the improvers as examples of urban blight. Compared to the presumed conformity of the suburbs, the humming, cosmopolitan milieu of her downtown sidewalks surely boasted a superior civilization. In the decades after Jacobs launched her downtown revolution, the argument for high-density core residence got a turbo boost from environmentalist quarters. Criticism of suburbia was no longer a matter of taste—how ugly and dull are these cookie-cutter houses and strip malls? Now it was backed up by estimates of the ecological costs of the unplanned, low-density tract development known as sprawl. In recent years, climate change had lent an extra sense of urgency to the case for downtown resettlement.
Conference papers on the topic "Miller (Firme)"
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Ortiz-Soto, Elliott, Xiaojian Yang, Joel Van Ess, Shahaboddin Owlia, Abhishek Joshi, and Matthew Younkins. "Controls and Hardware Development of Multi-Level Miller Cycle Dynamic Skip Fire (mDSF) Technology." In SAE WCX Digital Summit. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2021. http://dx.doi.org/10.4271/2021-01-0446.
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Ortiz-Soto, Elliott, Benjamin Wolk, Hao Chen, and Matthew Younkins. "mDSF: Improved Fuel Efficiency, Drivability and Vibrations via Dynamic Skip Fire and Miller Cycle Synergies." In WCX SAE World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2019. http://dx.doi.org/10.4271/2019-01-0227.
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"A 40-year mesoscale gridded fire weather climatology for Victoria – an overview." In 20th International Congress on Modelling and Simulation (MODSIM2013). Modelling and Simulation Society of Australia and New Zealand, 2013. http://dx.doi.org/10.36334/modsim.2013.a3.mills.
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Mintz, Todd S., George Adams, Marius Necsoiu, James Mancillas, Chris Bajwa, and Earl Easton. "Historical Rail Accident Analyses Identifying Accident Parameters That Could Impact Transportation of Spent Nuclear Fuel." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-25445.
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As the regulatory authority for transportation of spent nuclear fuel (SNF) in the United States, the Nuclear Regulatory Commission (NRC) requires that SNF transportation packages be designed to endure a fully engulfing fire with an average temperature of 800 °C (1,475 °F) for 30 minutes, as prescribed in Title 10 of the Code of Federal Regulations (CFR) Part 71. The work described in this paper was performed to support NRC in determining the types of accident parameters that could produce a severe fire with the potential to fully engulf a SNF transportation package. This paper describes the process that was used to characterize the important features of rail accidents that would potentially lead to a spent nuclear fuel transport package being involved in a severe fire. Historical rail accidents involving hazardous material and long duration fires in the United States have been analyzed using data from the Federal Railroad Administration (FRA) and the Pipeline and Hazardous Materials Safety Administration (PHMSA). Parameters that were evaluated from this data include, but were not limited to, class of track where the accident occurred, class of hazardous material that was being transported, and number of railcars involved in the fire. The data analysis revealed that in the past 34 years of rail transport, roughly 1,800 accidents have led to the release of hazardous materials resulting in a frequency of roughly 1 accident per 10 million freight train miles. In the last 12 years, there have only been 20 accidents involving multiple car hazardous material releases that led to a fire. This results in an accident rate of 0.003 accidents per million freight train miles that involved multiple car releases and a fire. In all the accidents analyzed, only one involved a railcar carrying Class 7 (i.e., radioactive) hazardous material (HAZMAT).
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Johnson, Jason S., Matthew Parker, Christina James, Joshua Taron, and Logan Armstrong. "FXAT SCREEN." In 2016 ACSA International Conference. ACSA Press, 2016. http://dx.doi.org/10.35483/acsa.intlp.2016.11.
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The FXAT Screen seeks to reclaim the presence of architecture and its imagery in the public realm. CNC milled opaque plywood panels produce a thickened surface revealing the material stratification within the planar surfaces. In direct contrast to the hyper smooth and streamlined aesthetic of contemporary media devices, the FXAT Screen wraps an artificial topography around an exaggerated cantilevered form that addresses both the pedestrian corridor of the urban core and the main venues for the RAIC ArchitectureFestival. A gradient of openings migrates across the form toward the street, concluding with a 14 x 7-foot rear projection screen showing the work of 15 emerging Canadian architecture firms in the RAIC’s Future Voice: Situating Architecture Exhibition.
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Larson, Eric D., Ryan E. Katofsky, and Stefano Consonni. "An Assessment of Black Liquor Gasification Combined Cycles: Part B — Emission, Costs and Macro-Benefits." In ASME Turbo Expo 2004: Power for Land, Sea, and Air. ASMEDC, 2004. http://dx.doi.org/10.1115/gt2004-53185.
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This paper and its companion (Consonni et al., 2004) summarize the results of a major study (Larson, et al., 2003) that assessed performances, emissions, costs and overall benefits of black liquor gasification combined cycle (BLGCC) technology for the U.S. kraft pulp and paper industry. This paper presents analysis and estimates of the potential mill-level air emissions and financial performance of future commercial BLGCC systems described in technical detail in the companion paper. Also, potential regional and national impacts on energy consumption and emissions are estimated under different future BLGCC market penetration scenarios. Emission estimates for SO2, NOx, CO, volatile organic carbon (VOCs), particulate matter, total reduced sulfur (TRS) and CO2 are developed based on detailed quantitative data for Tomlinson furnaces and on extrapolation of gas turbine emissions and other relevant data for BLGCC systems. Prospective economics for a hypothetical representative mill in the Southeastern U.S. are assessed by assuming that an investment would be made in a new power/recovery system to replace an existing Tomlinson system that has reached the end of its working life. Key inputs to the financial analysis include the mass/energy balances shown in the companion paper and engineering cost estimates for each power/recovery system that were developed by two outside engineering firms. Because the overall objective of the study was to examine the long-term commercial potential for BLGCC, the capital cost estimates were based on assumed “Nth plant” levels of technology maturity and operational reliability. Widespread commercial implementation of BLGCC systems in the United States would enable significant energy savings for the country as a whole. Significant reductions in emissions of criteria pollutants and greenhouse gases could also be achieved, especially in the Southeastern United States, where two-thirds of U.S. kraft pulp mills are located. Relative to state-of-the-art Tomlinson systems, financial returns on investment are attractive without explicit valuation of environmental benefits. With monetary valuation of such benefits, the financial returns are very attractive.
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Bajwa, Christopher S., and Earl P. Easton. "Risk Perspectives on Rail Transport of Spent Nuclear Fuel." In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61563.
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The US Nuclear Regulatory Commission (NRC) has completed a study of historical rail accidents (from 1975 to 2005) involving hazardous materials and long duration fires in the United States. The study was initiated to determine what types of accidents had actually occurred, and what type of impact those types of accidents could have on the rail transport of spent nuclear fuel. The NRC found that almost 21 billion miles of rail shipments has yielded only a small number of accidents involving hazardous materials, eight of which involved both hazardous materials and long duration fires. The NRC reviewed these eight accidents in detail to determine what types of effects these accidents might have on a spent fuel cask, should one have been involved. The staff determined that the fires witnessed in the accidents studied would not have provided a fully engulfing fire environment as described by the hypothetical accident condition fire in NRC regulations for radioactive material transport found in Title 10 of the Code of Federal Regulations, Part 71, Section 73. This paper will detail the NRC study of these accidents and conclusions regarding effects on transportation casks exposed to the fires that resulted from these accidents.
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Leishear, Robert A. "Nuclear Power Plant Fires and Explosions: Part II — Hydrogen Ignition Overview." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-66278.
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Major accidents that were affected by hydrogen fires and explosions included Chernobyl, Three Mile Island, and Fukushima Daiichi. Smaller piping explosions have occurred at Hamaoka and Brunsbüttel Nuclear Power Plants. An overview of pertinent topics is presented here to compare similarities and differences between these accidents. In particular, a hydrogen ignition mechanism is presented here, where fluid transients, or water hammer, may cause pressures to compress flammable hydrogen gas in reactor systems. As the gas compresses, it heats to temperatures sufficient to cause autoignition, or dieseling. Autoignition then leads to fires or explosions in nuclear power plant systems. To explain this evolving theory on hydrogen ignition during fires and explosions, various nuclear power plant hydrogen accidents require discussion. For example, Chernobyl explosions were unaffected by water hammer, while a Three Mile Island hydrogen fire was a direct result of water hammer following a reactor meltdown, and explosions that followed a meltdown at Fukushima Daiichi occurred during a water hammer event. Other piping damages also occurred during water hammer events. The primary purpose of this paper is to serve as a literature review of past accidents and to provide new insights into those accidents. In short, what is known versus what is unknown is discussed here with respect to the ignition sources of nuclear power plant fires and explosions. How can nuclear power plant safety be assured unless previous fire and explosion causes are understood? Prior to this work, they were not understood.
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Leishear, Robert A. "Nuclear Power Plant Fires and Explosions: Part IV — Water Hammer Explosion Mechanisms." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-66279.
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Water hammers, or fluid transients, compress flammable gasses to their autognition temperatures in piping systems to cause fires or explosions. While this statement may be true for many industrial systems, the focus of this research are reactor coolant water systems (RCW) in nuclear power plants, which generate flammable gasses during normal operations and during accident conditions, such as loss of coolant accidents (LOCA’s) or reactor meltdowns. When combustion occurs, the gas will either burn (deflagrate) or explode, depending on the system geometry and the quantity of the flammable gas and oxygen. If there is sufficient oxygen inside the pipe during the compression process, an explosion can ignite immediately. If there is insufficient oxygen to initiate combustion inside the pipe, the flammable gas can only ignite if released to air, an oxygen rich environment. This presentation considers the fundamentals of gas compression and causes of ignition in nuclear reactor systems. In addition to these ignition mechanisms, specific applications are briefly considered. Those applications include a hydrogen fire following the Three Mile Island meltdown, hydrogen explosions following Fukushima Daiichi explosions, and on-going fires and explosions in U.S nuclear power plants. Novel conclusions are presented here as follows. 1. A hydrogen fire was ignited by water hammer at Three Mile Island. 2. Hydrogen explosions were ignited by water hammer at Fukushima Daiichi. 3. Piping damages in U.S. commercial nuclear reactor systems have occurred since reactors were first built. These damages were not caused by water hammer alone, but were caused by water hammer compression of flammable hydrogen and resultant deflagration or detonation inside of the piping.
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Banerjee, Arindam. "Buoyancy Driven Effects in Formation of Mixing Zones." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-67647.
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The release of a mass of hydrogen fuel (gas) into the ambient atmosphere results in the transient formation of flammable mixture zones that represent potential fire, explosion and toxic hazards. The formation of mixing zones of air and hydrogen for this simple geometry follows the classical Rayleigh Taylor (R-T) instability, which is induced when a heavy fluid is placed over a light fluid in a gravitational field. Buoyancy driven mixing in such flow configurations is studied by using the Boussinesq approximation and considering the flow to be laminar. However, this approximation is valid only at low Atwood numbers (non-dimensional density differences). As Atwood number increases (>0.1, i.e. large density differences) the Boussinesq approximation is no longer valid and a distinct bubble and spike geometry of Rayleigh-Taylor buoyant plumes is formed. Aside from asymmetry in the flow the Atwood number also affects key parameters such as the growth constants and molecular mix. The effect of initial conditions on the growth rate of turbulent Rayleigh-Taylor (RT) mixing has been studied using carefully formulated numerical simulations. A monotone integrated large-eddy simulation (MILES) using a finite-volume technique was employed to solve the three-dimensional incompressible Euler equations with numerical dissipation for air and hydrogen mixing at Atwood number 0.875. The study also provides preliminary guidelines for reducing the fire and explosion hazards in enclosures where such situations are present.
Reports on the topic "Miller (Firme)"
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Latham, Penelope A., Raymond C. Shearer, and Kevin L. O'Hara. Miller Creek Demonstration Forest - a forest born of fire: A field guide. Ft. Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 1998. http://dx.doi.org/10.2737/rmrs-gtr-7.
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Structure collapse at 140-year old mill building kills 2 career fire fighters and injures 2 others - Pennsylvania. U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, May 2019. http://dx.doi.org/10.26616/nioshfffacef201806.
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