Academic literature on the topic 'Morger + Dettli (Firm)'
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Journal articles on the topic "Morger + Dettli (Firm)"
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Penha de Souza, Edileuza. "“O caso do homem errado” – o cinema como instrumento de denúncias do genocídio da população negra." AVANCA | CINEMA, February 26, 2021. http://dx.doi.org/10.37390/avancacinema.2020.a158.
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The present paper analyzes the fallacy of racial democracy in Brazil, studying the film The Case of the Wrong Man, documentary by Camila Moraes which investigates in detail the death of Júlio César de Melo Pinto, a black young man murdered by the police on May, 14th, 1987, in the state of Rio Grande do Sul. The documentary feature film was born in 2015, when the movie director was in college and taking a course on investigative journalism. Through several collected testimonies, the movie director reproduces the episodes involved in the execution of Júlio César, bringing to the film the view, the technique and the sensitivity peculiar to a black woman movie maker who reaffirms the osition of the black cinema in the space of the feminine. A documentary at the same time expository and investigative, marked by the argument that “Black lives matter”, The Case of the Wrong Man, consolidates itself as a film from within, towards from the outside. By denouncing the genocide of the Brazilian black youth, the film presents the helplessness and hopelessness of the black families in the country and reiterates the innocence of Júlio César.
Books on the topic "Morger + Dettli (Firm)"
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Arjaliès, Diane-Laure, Philip Grant, Iain Hardie, Donald MacKenzie, and Ekaterina Svetlova. Quantitative Asset Managers and Their Chains. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198802945.003.0004.
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Chapter 4 discusses a particular set of fund managers and analysts, those who follow investment strategies which are based on quantitative research. They might be expected to be more solitary in their practices and less enmeshed in relations to clients and to other intermediaries than their colleagues who rely on more qualitative reasoning. The chapter shows, however, that this is not so. Quantitative managers’ investment ideas often come from others in the investment chain. Brokers and sell-side analysts are one major source; another source of ideas is those occupying similar roles in other firms. The chapter also suggests that basing a quantitative investment strategy around an idea that is already in circulation eases the task of marketing and the communication with clients. However, successful self-presentation to external audiences can cause internal frictions with colleagues within the investment firm, the other topic which the chapter explores in detail.
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Empson, Laura. Introduction and Overview. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198744788.003.0001.
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Professional organizations—such as accounting, consulting, and law firms, investment banks, hospitals, and universities—embody some of the most complex and challenging interpersonal and leadership issues that organizations present. Leaders of professional organizations must contend with ambiguous authority structures, complex interpersonal relations, and idiosyncratic professional colleagues: in other words, with the power, the politics, and the prima donnas. This chapter introduces the core themes of the book. It identifies the book’s intended audience, the kinds of practitioners and academics it will appeal to and why. It provides data on the scale and significance of the professional services sector and defines in detail what is meant by the concepts ‘professional organization’ and ‘professional services firm’. It outlines the empirical foundations, which include formal research interviews with more than 500 professionals in sixteen countries, and concludes by presenting a detailed overview of all the chapters in the book.
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Kleege, Georgina. Audio Description Described. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190604356.003.0008.
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Audio description seeks to make visual media—film, television, theater, art exhibits—accessible to blind people. This chapter uses the audio described version of the Oscar-nominated film The Sessions as an example of the current standards. Audio description of film is timed to fit in the silences between spoken dialogues which means that only minimal detail is possible. Even more problematic is the rule that description must be objective. Often important information is omitted when it is understood as interpretative. I then speculate on future innovations that could bypass some of these problems, democratize the medium and make it more aesthetic and inclusive.
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Rowbotham, Emma L., and Andrew J. Grainger. Radiographic imaging. Oxford University Press, 2013. http://dx.doi.org/10.1093/med/9780199642489.003.0066.
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Plain film radiography is often the first imaging modality employed in the assessment of patients with a rheumatological condition. More recently this has been superseded by cross-sectional imaging, in particular ultrasound and MRI, which have improved sensitivity in detection of early disease when compared with plain film imaging. However, there remains a role for conventional radiography in both the initial diagnosis and monitoring of disease progression. A standard approach to assessing radiographs in the context of arthropathy is usually employed by radiologists; by following this structured review a diagnosis or narrow differential may be reached on plain film imaging alone. Plain film radiograph findings of the most common rheumatological disorders are covered in detail in this chapter including osteoarthritis, the inflammatory arthritides, and crystal arthropathy. Findings in the connective tissue disorders are then covered, followed by less commonly encountered conditions such as SAPHO, neuropathic arthropathy, and haemochromotosis.
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Rowbotham, Emma L., and Andrew J. Grainger. Radiographic imaging. Oxford University Press, 2015. http://dx.doi.org/10.1093/med/9780199642489.003.0066_update_001.
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Plain film radiography is often the first imaging modality employed in the assessment of patients with a rheumatological condition. More recently this has been superseded by cross-sectional imaging, in particular ultrasound and MRI, which have improved sensitivity in detection of early disease when compared with plain film imaging. However, there remains a role for conventional radiography in both the initial diagnosis and monitoring of disease progression. A standard approach to assessing radiographs in the context of arthropathy is usually employed by radiologists; by following this structured review a diagnosis or narrow differential may be reached on plain film imaging alone. Plain film radiograph findings of the most common rheumatological disorders are covered in detail in this chapter including osteoarthritis, the inflammatory arthritides, and crystal arthropathy. Findings in the connective tissue disorders are then covered, followed by less commonly encountered conditions such as SAPHO, neuropathic arthropathy, and haemochromotosis.
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Shaftel, Matthew. A Consideration of Drama, Lyrics, and Musical Structure in a Porter Film. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252040092.003.0014.
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This chapter examines the lyrics and musical structure of the three ballads that Porter wrote in the fall of 1939 for the movie musical Broadway Melody of 1940. It underscores Porter's attention to detail not only in his intricate texts and musical designs but also in his consideration of plot, story, and dramatic impulse. Even in the filmic medium, where Porter had a great deal less control over the final product than in his more native Broadway context, his work reveals an interconnectedness that allows for a deeper understanding of the film. Although the film's plot hardly represents high drama, the musical questions set up by the opening two ballads, “Between You and Me” and “I've Got My Eyes on You,” are answered in a beautiful and quite serious manner by “I Concentrate on You,” a Porter masterwork of the highest order.
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Walker, Elsie. The White Ribbon. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190495909.003.0008.
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This chapter explores the psychoanalytic resonance of the sound track for The White Ribbon. The film is among Haneke’s most ambitious feature productions, with over a hundred elliptical scenes. Its coherent thematic logic becomes clear through psychoanalysis, especially with regard to Lacanian concepts of the Symbolic and the Real. The Symbolic realm of the film is within a small village in Germany in the lead-up to World War One, where the voices of tyrannical patriarchs and the sounds of their violence dominate. The Real realm of The White Ribbon is even more fearsome, for it is shockingly, sonically attached to the bodies of children that ultimately resist their oppressive elders. The chapter establishes how every aural detail of The White Ribbon is loaded with repressed and subtextual meanings that constitute an ultimate warning: the oppressive Symbolic engenders the nightmarish Real.
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Thomson, C. Claire. A Film-progressive Nation: The Social Denmark Series and the British Documentary Movement. Edinburgh University Press, 2018. http://dx.doi.org/10.3366/edinburgh/9781474424134.003.0006.
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In the immediate post-WWII period, Danish documentary filmmaking was recognised overseas as productive and of high quality. This chapter tells the story of a collaboration between Ministeriernes Filmudvalg and the British Documentary Movement, which resulted in a package or series of five films made for the foreign market and entitled Social Denmark. The British documentarist Arthur Elton was invited to Copenhagen to oversee the production of one or more films which would promote newly-liberated Denmark to the world as a modern, progressive, democratic nation. Elton’s report on the state of Danish documentary and recommendations for its further development is discussed in detail as a snapshot of the state-of-the-art in international informational film production and distribution. Informational filmmaking was regarded in and of itself as a progressive act. The film People’s Holiday (Søren Melson, 1947) is analysed as an example of the Social Denmark films. The impact of conflicting political and aesthetic interests on its production is discussed, as well as the routes by which ‘facts’ emerge as such in the film, and its reception. The role of the auteur Carl Th. Dreyer in the production and promotion of Social Denmark is also considered.
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Townsend, Sylvia. Bumpy Road. University Press of Mississippi, 2019. http://dx.doi.org/10.14325/mississippi/9781496804143.001.0001.
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In meticulous detail, the book describes the filming, release, and influence of the 1971 film Two-Lane Blacktop. In 1970 the urbane producer Michael Laughlin asked the hippy filmmaker Monte Hellman to direct a script called Two-Lane Blacktop. The cult author Rudy Wurlitzer rewrote the script, the story of two scruffy hot rodders who pick up a girl hitchhiker and race their classic ’55 Chevy against a rich guy’s “factory –made hot rod,” a ’70 GTO Judge. In three of the four lead roles Hellman cast nonactors – the rock stars James Taylor and Dennis Wilson, and the director’s girlfriend, Laurie Bird. Hellman made an existentialist car-racing movie; nobody wins or even finishes the race, the protagonists are doomed to drive around endlessly. The film was slow-paced, the rock stars didn’t sing (and barely spoke), the movie had little music, and Hellman ignored other traditional crowd-pleasing conventions. When he resisted studio pressure to make the movie more conventional and commercial, it flopped at the box office. Universal failed to release the film on video, making it scarce and sought-after, and three of the four lead actors – Wilson Bird and Warren Oates, had untimely deaths, conferring mystique on the film. Many years after its release, the film gained wide acclaim, was released by the prestigious Criterion Collection and was preserved in the National Film Registry. In the book, the directors Wes Anderson, Richard Linklater and others tell how the movie influenced their work. Although Two-Lane Blacktop was a harbinger of the demise of New Hollywood films, brought about by the financial costs to Hollywood studios that allowed auteur directors to make non-commercial movies, had Hellman caved in to pressure to make the movie commercial, it would not have become a classic.
Book chapters on the topic "Morger + Dettli (Firm)"
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Bindseil, Ulrich, and Alessio Fotia. "The Central Bank as Lender of Last Resort." In Introduction to Central Banking, 79–100. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70884-9_6.
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AbstractIn this chapter we review the function of the central bank as lender of last resort (LOLR), starting from the understanding of financial crises developed in the previous chapter. We recall long-established LOLR principles: proactive lending, inertia of the central bank risk control framework, and risk endogeneity. Because of its systemic role, a central bank should not tighten its collateral framework in a crisis, as restrictive policies are likely to not only increase the overall damage done by a crisis to society, but to even increase central bank losses. We explain in more detail the main reasons why a central bank should act as LOLR: prevent negative externalities from fire sales; its unique status as institution with unlimited liquidity; its status as a risk-free counterparty making others accept to deliver collateral to it even at high haircuts; and its mandate to preserve price stability. We distinguish three different forms of LOLR: elements built into the regular operational framework; readiness to relax parameters in a crisis; and provision of emergency liquidity assistance to individual firms. We then discuss what could be the optimal propensity of a central bank to engage in LOLR activities and outline possible trade-offs. Last but not least, we develop a bank-run model which highlights the role of asset liquidity and central bank eligible collateral. We calculate through a model variant with binary asset liquidity and uniform central bank collateral haircut, but then also introduce a model variant with continuous asset liquidity and haircuts.
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Egan, Patrick J. W. "Patterns of Innovation among Multinational Firms." In Globalizing Innovation. The MIT Press, 2018. http://dx.doi.org/10.7551/mitpress/9780262037358.003.0003.
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This chapter chronicles the spread of innovation-intensive forms of foreign investment. It is primarily descriptive, and provides the empirical context for the econometric tests in subsequent chapters. The multifaceted concept of innovation is investigated in detail in this chapter. Historical patterns of multinational innovation are presented, followed by more recent empirical trends. The evolving sectoral distribution of FDI in developing countries is examined, as are the potential implications for innovative activities. The chapter extensively details patterns of multinational innovation, through firm surveys and aggregated country level data. Additionally, the extent of innovation spillovers and linkages with economic actors in host countries is considered. Among the core findings in this chapter are that innovation is becoming more common in developing countries, innovation is concentrated in specific regions, and service sector investment represents an increasing share of investment in emerging economies. Firms in some sectors are also more likely to embed in host economies than firms in other sectors.
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Seppälä, Jaakko. "Contesting Marriage: The Finnish Unromantic Comedy." In Nordic Genre Film, 159–72. Edinburgh University Press, 2015. http://dx.doi.org/10.3366/edinburgh/9780748693184.003.0012.
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The genre of the romantic comedy was domesticated in the studio era of Finnish cinema that lasted from the early 1930s to late 1950s by filmmakers who admired Hollywood films, an example of whom would be Valentin Vaala. This domestication was an easy process for the reason that romantic comedies are universal in tone, which means they can be set pretty much in any location, discuss context-specific problems related to relationships and be produced with the modest budgets of small nation cinemas. This has made the genre more than suited for Finnish cinema. Before analysing the Finnish films in detail, I am going to provide a quick background exploration of Finnish romantic comedies of the studio era in order to show the transformation.
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Moss-Wellington, Wyatt. "Parenthood: A Humanistic Close Reading." In Narrative Humanism, 181–207. Edinburgh University Press, 2019. http://dx.doi.org/10.3366/edinburgh/9781474454315.003.0010.
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Part IV looks at a film text often described as “humanistic” using the analytical methods established throughout the book. This chapter describes how Parenthood’s particular domestic realism offered a precursor to later suburban ensemble pictures, before breaking down the politics, ethics and psychology of the film. The latter half of the chapter goes into more detail on the narrative’s modelling of familial psychology, but also the way the film form itself represents many of its key concerns: Parenthood’s structure provokes the very confounding emotional causality across extended networks that the film speaks to.
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Walden, Kiri Bloom. "Peeping Tom in 1960." In Peeping Tom, 9–22. Liverpool University Press, 2021. http://dx.doi.org/10.3828/liverpool/9781800348370.003.0002.
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This chapter gives an overview of British popular culture in 1960, looking at society in post-war Britain and showing how different Peeping Tom was to other films released that year. It then looks in detail at the critical response to the film at the time it came out, trying to unpick why the most influential critics of the time responded to it in such a negative way, writing damning reviews that had a devastating effect on the future of the film and its director Michael Powell. We also look at the lesser known, more positive reviews from foreign and trade publication film critics.
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Holliday, Christopher. "Towards a Journey Narrative Syntax." In The Computer-Animated Film, 41–62. Edinburgh University Press, 2018. http://dx.doi.org/10.3366/edinburgh/9781474427883.003.0003.
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This chapter moves forward by unpacking the generic identity of computer-animated films and examines the journey narrative structure as their prevailing syntax and first line of action. In this chapter, two forms of narrative are established that are widely operational within the genre. The first of these are the “flushed away” narratives that rely upon on abrupt geographical disjuncture, and which often requires the protagonist to negotiate and quickly adapt to a foreign milieu. The second journey narrative form advanced in this chapter is the “over the hedge” narrative, which are voyages signalled as altogether more prepared or expected. This chapter explores in detail how computer-animated films deploy these two forms of journey narrative structure to interrogate ideas of mobility, location, destination and tourism through the virtual experiences they offer of travelled space. Chapter Two concludes by positioning the journey narrative within the context of film franchising and the “sequelled” narrative. Computer-animated films rarely exists in isolation, but are supported by a range of sequels, spin-offs and short films. This chapter identifies how narrative structure can be productively entwined with the wider role of film series and cycles that continues to define the franchise mentality of post-millennial Hollywood cinema.
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Rowbotham, Emma L., and Andrew J. Grainger. "Radiographic imaging." In Oxford Textbook of Rheumatology, 477–91. Oxford University Press, 2013. http://dx.doi.org/10.1093/med/9780199642489.003.0066_update_002.
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Plain film radiography is often the first imaging modality employed in the assessment of patients with a rheumatological condition. More recently this has been superseded by cross-sectional imaging, in particular ultrasound and MRI, which have improved sensitivity in detection of early disease when compared with plain film imaging. However, there remains a role for conventional radiography in both the initial diagnosis and monitoring of disease progression. A standard approach to assessing radiographs in the context of arthropathy is usually employed by radiologists; by following this structured review a diagnosis or narrow differential may be reached on plain film imaging alone. Plain film radiograph findings of the most common rheumatological disorders are covered in detail in this chapter including osteoarthritis, the inflammatory arthritides, and crystal arthropathy. Findings in the connective tissue disorders are then covered, followed by less commonly encountered conditions such as SAPHO, neuropathic arthropathy, and haemochromotosis.
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Kidd, John, and Tessa Yuk Lan Yau. "Management Integration through Software Applications." In Advances in Global Information Management, 190–206. IGI Global, 2002. http://dx.doi.org/10.4018/978-1-930708-43-3.ch013.
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Through the 1970’s to the present time the governance of the Japanese firm overseas has changed, moving towards a more international form of operation rather than operating as a peripheral organization based solidly on the Japanese headquarters office. Notwithstanding the evolution of their formal and informal management structures this research questions in detail the nature of computer software that may have been imported from Japan to the UK to control imported production systems and/or to control management data flows. These research questions stem from evidence noted in the 1980’s that imported Japanese production machines contained Japanese language instructions beneath their cover plates: so when maintenance was to take place, the UK engineers became baffled and then frustrated at their inability to translate the “instructions.” In the research reported here, we are essentially asking if the computer programs used to control this imported machinery carry embedded Japanese documentation which may prove difficult to interpret by software engineers in the UK? As an adjunct to this question, we note the origin of their control software (and other software used by the Japanese production subsidiaries in the UK), its modification in the UK (by whom), and the natural language used to communicate with the HQs in Japan. As an emergent finding, we report on the tensions arising at that time from the data-integration of the Japanese firms’ operations in Europe through the use of Enterprise Resource Planning software.
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Kelly, Gillian. "The dramatic performer." In Tyrone Power, 33–82. Edinburgh University Press, 2021. http://dx.doi.org/10.3366/edinburgh/9781474452946.003.0002.
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The first genre chapter concerns Power’s many roles in dramatic films. His first and final films were both dramas, as was his star making role Lloyds of London (Henry King, 1936), and it is with an analysis of this film that the chapter begins. Applying a chronological approach to Power’s roles in dramatic productions, the chapter explores each of his films within this genre in turn, some in more detail than others, in order to suggest what changed and what remained the same about his performance style, image and physical appearance across his career from becoming a star in 1936 to his last completed film before his untimely death, the court-room drama Witness for the Prosecution (Billy Wilder, 1957). Other films which receive more attention are his first anti-hero role in Johnny Apollo (Henry Hathaway, 1940) and one of his darkest and best-known films, Nightmare Alley (Edmund Goulding, 1947), made after his return to Hollywood after three years of active duty during World War II.
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Donovan, Therese M., and Ruth M. Mickey. "The Survivor Problem: Simple Linear Regression with MCMC." In Bayesian Statistics for Beginners, 269–307. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198841296.003.0017.
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While one of the most common uses of Bayes’ Theorem is in the statistical analysis of a dataset (i.e., statistical modeling), this chapter examines another application of Gibbs sampling: parameter estimation for simple linear regression. In the “Survivor Problem,” the chapter considers the relationship between how many days a contestant lasts in a reality-show competition as a function of how many years of formal education they have. This chapter is a bit more complicated than the previous chapter because it involves estimation of the joint posterior distribution of three parameters. As in earlier chapters, the estimation process is described in detail on a step-by-step basis. Finally, the posterior predictive distribution is estimated and discussed. By the end of the chapter, the reader will have a firm understanding of the following concepts: linear equation, sums of squares, posterior predictive distribution, and linear regression with Markov Chain Monte Carlo and Gibbs sampling.
Conference papers on the topic "Morger + Dettli (Firm)"
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Tang, Zhonghao, Gongnan Xie, Honglin Li, Wenjing Gao, Chunlong Tan, and Lei Li. "Numerical Analysis on the Leading Edge Film Cooling of Bifurcation Holes for Gas Turbine Blade." In ASME 2021 Heat Transfer Summer Conference collocated with the ASME 2021 15th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/ht2021-62615.
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Abstract Film cooling performance of the cylindrical film holes and the bifurcated film holes on the leading edge model of the turbine blade are investigated in this paper. The suitability of different turbulence models to predict local and average film cooling effectiveness is validated by comparing with available experimental results. Three rows of holes are arranged in a semi-cylindrical model to simulate the leading edge of the turbine blade. Four different film cooling structures (including a cylindrical film holes and other three different bifurcated film holes) and four different blowing ratios are studied in detail. The results show that the film jets lift off gradually in the leading edge area as the blowing ratio increases. And the trajectory of the film jets gradually deviate from the mainstream direction to the spanwise direction. The cylindrical film holes and vertical bifurcated film holes have better film cooling effectiveness at low blowing ratio while the other two transverse bifurcated film holes have better film cooling effectiveness at high blowing ratio. And the film cooling effectiveness of the transverse bifurcated film holes increase with the increasing the blowing ratio. Additionally, the advantage of transverse bifurcated holes in film cooling effectiveness is more obvious in the downstream region relative to the cylindrical holes. The Area-Average film cooling effectiveness of transverse bifurcated film holes is 38% higher than that of cylindrical holes when blowing ratio is 2.
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Leedom, D. H., and S. Acharya. "Large Eddy Simulations of Film Cooling Flow Fields From Cylindrical and Shaped Holes." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-51009.
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Large Eddy Simulations (LES) of cylindrical, laterally diffused, and console holes are performed, and the resulting flow field data is presented. The motivation for performing LES is to enable more accurate simulations and to obtain a better understanding of the flow physics associated with complex hole shapes. The simulations include the coolant delivery tube and the feeding plenum chamber, and are performed for a specific mass flow rate of coolant per unit width of blade. A crossflow inlet is used on the plenum, and the resulting asymmetric flow characteristics are investigated. Coolant delivery tube flow fields are investigated in detail. Results show qualitative agreement with reported trends of improved film coverage with diffused and console holes.
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Vrbka, Martin, Tomas Navrat, Ivan Krupka, Martin Hartl, and Jiri Gallo. "Effect of Proteins on Film Formation in Bovine Serum Lubricated Contacts Under Rolling/Sliding Conditions." In ASME/STLE 2012 International Joint Tribology Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ijtc2012-61089.
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The aim of this study is to perform detail experimental mapping of the lubricating film thickness of bovine serum (BS) within the contact between an artificial metal or ceramic femoral head and a glass disc and analyze effect of proteins on the film formation under rolling/sliding conditions. The film thickness was studied experimentally using an optical test rig as a function of time under variety of constant mean speeds. Chromatic interferograms were recorded with a high-speed digital camera and evaluated with thin film colorimetric interferometry. Under pure rolling conditions it was observed that the central film thicknesses increased with time for all measurements. When the disc was slower than head then the measured central film thicknesses achieved values only about some few nanometres, whereas when the tests were realized with faster disc then measured central film thicknesses achieved significantly higher values. Distribution of the film thickness within the contact zone is not homogeneous and two different film thickness regions can be found; thicker protein film and thinner base film that both show specific behaviour over time. This study showed that protein formation plays an important role in the lubrication processes of artificial joints of the human. Due to challenging of this study the more complex research work is carried out at the present time.
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Ou, Kesheng, Jinyang Zheng, and Yongzhi Zhao. "Investigation on On-Board High-Pressure Composite Tanks Subjected to Localized and Engulfing Fire." In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78453.
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Safety performance of on-board high-pressure composite tanks under fire exposure has drawn extensive attention. Vehicle fires usually lead to such tanks experiencing a term of localized and engulfing fire. During this period, the composite tank would be degraded and even burst before pressure relief device (PRD) opens to release internal high-pressure gas. In this paper, experimental investigation for the tanks subjected to localized and engulfing fire was conducted on an Aluminum liner composite tank filled with hydrogen. Based on the temperature distribution and pressure rise measured in the experiment, a three-dimensional computational fluid dynamics model is developed to study the key factors influencing PRD activation time. The effects of filling medium, tank pressure and localized fire exposure time are analyzed in detail. The experimental results showed that pressure and temperature of internal gas changed little during the localized fire. In addition, filling medium and tank pressure have weak influence on the activation time of thermally-activated PRD (TPRD), but have significant effect on the activation time of pressure-activated PRD. TPRD can respond more quickly to protect the hydrogen composite tank than pressure-activated PRD. PRD activation time increases as the localized fire exposure time extends.
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Zhang, Hai, Bin Jiang, Mingcong Luo, Xiangkun Liu, Shuangming Fan, Lu Yang, and Qun Zheng. "Investigation of Water Film Formation on Blade Surfaces of a Wet Compression Transonic Compressor Rotor." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-43129.
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As is known, when water injected at the inlet of the compressor, the water droplets will move onto the blade where water film could form on the blade surface. In this paper, the movement and formation of the water film on a transonic rotor, NASA Rotor 37, are simulated and analyzed by using unsteady numerical methods under different water injecting conditions. The motions of water droplets and flows in the blade passage are presented in detail. Tearing process of water film on the blade surface is also a key point of this research. The preliminary results indicate that the movement of water droplets is tending to deviate from the suction surface and pile on the pressure surface due to the effect of inertia force, and water film could be formed on the pressure surface. Continuity and scope of the water film on the blade surface will develop with the increasing of droplet sizes and water injection rate. Based on the simulation, it is found that more discrete water films are formed on the pressure side of blade when the droplets move onto the pressure surface, tearing phenomenon may occur where the area is of lower water film thickness. Smaller enough sprayed droplet size can not only ensure the compressor performance of wet compression, but also avoid the erosion caused by water film accumulation.
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Li, Bo, Yantian Zuo, Wenhua Shu, and Xiaoying Tang. "The Research of the Fitness-for-Service Assessment on Steels for Pressure Vessel Subjected to Fire Damage: Metallurgical Analysis and the Influence on Performance Degradation." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-65279.
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The fitness-for-service assessment to fire damage for pressure vessels was considered to be based on the material deterioration and performance degradation associated with heat exposure. The identification of thermal damage zones after exposure to fire was proposed and provided in the API 579-1/ASME FFS-1 Standard. However, the more explicit quantitative relationships between the heat exposure conditions and the performance degradation degree of the pressure vessels suffering fire were not reported in detail with the thermal damage zone metallurgical analysis, which was not available in the Standard. Therefore, the present research was conducted on the influences of fire suffering test and heat exposure, under different thermal conditions, on the micro-structure evolution and mechanical performance of austenitic stainless steels and carbon steels for pressure vessel equipment. And the metallurgical analysis results described some typical appearances in micro-structure observed in the materials experienced to fire and heat exposure. Moreover, the quantitative degradation of mechanical properties was investigated via multiple testing means such as mechanical tensile test at room temperature and low temperature, the Charpy impact testing, the torsion testing, and the hardness measurement. The present research provided data accumulation of material deterioration and performance degradation was believed to be benefited to the fitness-for-service assessment of pressure vessel after exposure to fire. The material thermal degradation mechanism and the fitness-for-service assessment process of fire damage behavior was further discussed.
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Wang, X. D., G. Lu, X. F. Peng, and B. X. Wang. "Evaporation and Nucleate Boiling of an Individual Droplet on Surfaces." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72316.
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A visual study was conducted to investigate the evaporation and nucleate boiling of a water droplet on heated copper, aluminum, or stainless surfaces with temperature ranging from 50°C to 112°C. Using a high-speed video imaging system, the dynamical process of the evaporation of a droplet was recoded to measure the transient variation of its diameter, height, and contact angle. When the contact temperature was lower than the saturation temperature, the evaporation was in film evaporation regime, and the evaporation could be divided into two stages. When the surface temperature was higher than the saturation temperature, the nucleate boiling was observed. The dynamical behavior of nucleation, bubble dynamics droplet were detail observed and discussed. The linear relationships of the average heat flux vs. temperature of the heated surfaces were found to hold for both the film evaporation regime and nucleate boiling regime. The different slopes indicated their heat transfer mechanism was distinct, the heat flux decreased in the nucleate boiling regime more rapidly than in the film evaporation due to the strong interaction between the bubbles.
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Meyer, Stephen P. "Sources of Uncertainty in a Fire Probabilistic Safety Assessment." In 17th International Conference on Nuclear Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/icone17-75360.
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Probability Safety Assessments (PSA) by their nature are approximations of the actual risk and consequences of an accident at a nuclear power plant. Today the PSA models are becoming more complex as the computers and PSA software are faster and PSA modeling techniques are improved. Many PSAs now integrate into a single model internal initiators, internal floods, and internal fires. Each of these initiator types has some uncertainties in common and some that are primarily associated with a specific initiator type. This paper discusses some of those uncertainties found in Fire PSAs. Uncertainties in Fire PSAs arise from the broad categories of phenomenological modeling and assumptions, PSA model development and assumptions, data, and human failure events (HFEs). Phenomenological development and assumptions would include the heat release rates, fire durations, zones of influence, damage criteria, fire propagation, and the impact of smoke on equipment. Aside from the model development and assumptions in the traditional internal events PSA, the inclusion or exclusion of mitigating systems into a Fire PSA model generally has greater impact on the results than in the internal events PSA model. Most plants do not have readily available cable information for non-safety related cables. The cost to determine cable routing for non-safety related cable can be very high and, therefore, most Fire PSAs do not include non-safety mitigating systems except where needed. This increases the level of uncertainty and can skew the results. Data uncertainty arises from ignition frequency determinations, fuel available to a fire, the probability of success/failure of fire suppression systems, and the probability of hot shorts and consequential spurious operation. In addition to the HFEs included in an internal events PSA, there are other HFEs specific to fires. These include new human error probabilities (HEPs) for those HFEs that are part of the internal events PSA model due to the fact that there is a fire occurring and added stress and instrumentation failure may result. There are also HFEs associated directly with the fire such as fire detection and suppression. New HFEs will be needed to be modeled for Control Room evacuation. PSAs are being used more and more in the decision making processes of operating nuclear power plants. It is often required that initiators other than the traditional “internal events” be included in these processes. Understanding the uncertainties that are part of the Fire PSA is needed to make an informed decision. This paper addresses each of these in greater detail and provides techniques in understanding the impacts of the uncertainties.
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Renze, Peter, Wolfgang Schro¨der, and Matthias Meinke. "Large-Eddy Simulation of Film Cooling Flow Ejected in a Shallow Cavity." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-50120.
Full textAbstract:
In the present paper the flow field of a film cooling configuration with cylindrical holes embedded in a shallow cavity is investigated using large-eddy simulation (LES). The cooling jet is injected through a single row of inclined holes from a transverse cavity into a turbulent flat plate boundary layer at a temperature ratio of TR = 0.44. The mixing of the cooling fluid and the crossflow within the cavity is a highly unsteady process generating complex vortical structures. The impact of the boundary layer separation at the upstream cavity edge on the jet-crossflow interaction is studied in detail. The driving mechanisms of the momentum and heat exchange between the jet and the crossflow are identified and discussed. The flow field and the adiabatic cooling efficiency is compared to a standard cylindrical film cooling configuration without a cavity. The development of the counter-rotating vortex pair (CVP) downstream of the jet injection is investigated. An analysis of the vortex dynamics shows an impinging behavior of the jet fluid in this area. The Reynolds stress shows a more two-dimensional distribution compared to the anisotropic nature of the jet-in-a-crossflow (JICF) at standard cylindrical holes. Since the heat exchange is closely connected to the transport of momentum in the mixed boundary layer, this observation explains the enhanced lateral spreading of the cooling fluid.
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Ebner, J., M. Gerendás, O. Schäfer, and S. Wittig. "Droplet Entrainment From a Shear-Driven Liquid Wall Film in Inclined Ducts: Experimental Study and Correlation Comparison." In ASME Turbo Expo 2001: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/2001-gt-0115.
Full textAbstract:
The primary objective of the present study is to clarify the droplet disintegration mechanism and the film properties of liquid oil films driven by shear stress, which is induced by a co-current gas flow. This work focuses on the flow behavior within the starting length of the complex two-phase flow and the effect of inclination on the entrainment rate. Many investigations have been performed in the past to determine the droplet entrainment in the gas core for fully-developed flow conditions with respect to their relevance in pipes of power plants and various chemical engineering systems (Hewitt and Taylor, van Rossum, Ishii and Grolmes [1, 2, 3]). In more recent work the effect of inclination has been studied in detail (Lee and Mjani, Azzopardi, Azzopardi et al. [4, 5, 6]). Nevertheless, a lack of knowledge can be realized for droplet entrainment within the starting length of this complex flow type. Thus, fundamental experiments have been carried out to provide a data base for droplet entrainment of liquid disintegrated from an oil film within its starting length at several inclination angles of the flow. The experimental results have been compared with correlations from literature. Additionally, the wall film thickness has been measured to allow a fully-coupled modelling of entrainment and liquid film properties depending on global flow parameters. Based on film Reynolds number, Weber number, a dimensionless film flow length and a modified Froude number, taking into account the angle of inclination, correlations have been developed, where those from literature are not applicable.