1,721,316 research outputs found
Artificial intelligence and mathematical models for intelligent management of aircraft data
No full textIncreasingly, large volumes of aircraft data are being recorded in an effort to adapt aircraft maintenance procedures from being time-based towards condition-based techniques. This study uses techniques of artificial intelligence and develops mathematical models to analyse this data to enable improvements to be made in aircraft management, affordability, availability, airworthiness and performance. In addition, it highlights the need to assess the integrity of data before further analysis and presents the benefits of fusing all relevant data sources together.The research effort consists of three separate investigations that were undertaken and brought together in order to provide a unified set of methods aimed at providing a safe, reliable, effective and efficient overall procedure. The three investigations are:1. The management of helicopter Health Usage Monitoring System (HUMS) Condition Indicators (CIs) and their analysis, using a number of techniques, including adaptive thresholds and clustering. These techniques were applied to millions of CI values from Chinook HUMS data.2. The identification of fixed-wing turbojet engine performance degradation, using anomaly detection techniques, applied to thousands of in-service engine runs from Tornado aircraft.3. The creation of models to identify unusual aircraft behaviour, such as uncommanded flight control movements. Two Chinook helicopter systems were modelled and the models were applied to over seven hundred in-service flights.In each case, the existing techniques were directed toward a condition-based maintenance approach, giving improved detection and earlier warning of faults
American Literature and the Fiction of Corporate Personhood
No full textThis chapter examines how American literature has engaged with business corporations in general, and the legal fiction of corporate personhood in particular. There are few major novels about business corporations, because literary fiction has tended to concentrate on the moral dilemmas and social entanglements of individuals, rather than the more impersonal realm of economic activity. Yet the changing legal nature and increasing importance of corporations has forced some writers to rethink what it means to be human, creatively rethinking the relationship between individual and collective agency. The chapter considers three phases in the literary representation of corporations: as monster, as system, and as story. It uses as examples James Fenimore Cooper’s The Bravo (1831), Frank Norris’s The Octopus (1901), Sloan Wilson’s The Man in the Gray Flannel Suit (1955), Joseph Heller’s Catch-22 (1961), Thomas Pynchon’s Gravity’s Rainbow (1973), Richard Powers’s Gain (1998), and Joshua Ferris’s Then We Came to the End (2007)
The effects of mis-alignment and background noise in a low energy gamma-ray telescope
No full textSIGLEAvailable from British Library Document Supply Centre- DSC:DX96932 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
Imagining the market: a visual history
No full textThis curation project explores visual representations of financial markets. Focusing on phases of upheaval in transatlantic finance extending back to the early eighteenth century, it traces a recurrent interplay among figuration, abstraction, and allegory in the attempts by graphic practitioners of various kinds (from pamphlet illustrators to fine art photographers) to imagine “the market” in visual form
Clarification of cane juice for fermentation
No full textFermentation feedstocks in the sugar industry are based on cane juice, B molasses or final molasses. Brazil has been producing ethanol by directing sugarcane juice to fermentation directly or using lower quality juice as a diluent with B molasses to prepare the fermentation broth. One issue that has received only limited interest particularly from outside Brazil is the most appropriate conditions for clarification of the juice going to fermentation. Irrespective of whether the juice supply is the total flow from the milling tandem or a diffuser station or a part of the total flow, removal of the insoluble solids is essential. However, the standard defecation process used by sugar factories around the world to clarify juice can introduce unwanted calcium ions and remove other nutrients such as phosphorus and nitrogen that are considered essential for the fermentation process. An investigation was undertaken by SRI to assess the effects on the constituents of cane juice when subjected to the typical clarification process in an Australian factory and what conditions would be needed to provide a clarified juice suitable for fermentation. Typical juices from one factory were clarified in laboratory trials under a range of pH conditions and the resulting clarified juices analysed. The results indicated that pH had a major effect on the residual concentrations of key constituents in the clarified juice and that the selected clarification conditions are determined by the nominated quality criteria of clarified juice feedstock for fermentation. Further trials were conducted in overseas factories to confirm the results obtained in Australia. It became apparent that the preferred specifications for clarified juice going to fermentation varied from country to country. Each supplier of fermentation technology had criteria applying to clarified juice feedstock that would have a major impact on the standard of clarification required to achieve compliance with the criteria
Wolfgang Koeppen: 'Unmasking' the 'Author' of a Holocaust Testimony
No full textThe possibility that works of art and literature might be forged and that identity might be faked has haunted the cultural imagination for centuries. That spectre seems to have returned with a vengeance recently, with a series of celebrated hoaxes and scandals ranging from the Alan Sokal hoax article in Social Text to Binjamin Wilkomirski's "fake" Holocaust memoir. But as well as creating anxiety, the possibility of "faking it" has now been turned into entertainment. Traditionally these activities have been dismissed as dangerous and immoral, but more recently some scholars have begun to speculate, for example, that all forms of national identity rely on forged myths of origin. Recent cultural theory has likewise called into question traditional notions of authenticity and originality in both personal identity and in works of art. Despite critical pronouncements of the death of the author and the substitution of the simulacrum for the original, however, making a distinction between the genuine and the fake continues to play a major role in our everyday understanding and evaluation of culture, law and politics. Consider, for example, the fiasco surrounding the "forged" Hitler diaries, law suits against auction houses for failing to detect forgeries in the art market, or the problem of plagiarism at universities. It still seems to matter that we can spot the difference, especially in the historical moment when we are capable of making copies that are indistinguishable perhaps even better than the original. This collection of essays considers the moral, aesthetic and political questions that are raised by the long history and current prevalence of fakes and forgeries. The international team of contributors consider the issues thrown up by a wide range of examples, drawn from fields ranging from literature to art history. These case studies include little-known subjects such as Eddie Burrup, the Australian aboriginal artist who turned out to be an 81-year-old white woman, as well as new interpretations of familiar cases such as faked holocaust memoirs. The strength of the collection is that it brings together not only a wide range of cultural examples of fakes and forgeries from different historical periods, but also offers a wide variety of theoretical takes that will form a useful introduction and casebook on this growing field of inquiry
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