Littérature scientifique sur le sujet « Real binary forms »
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Articles de revues sur le sujet "Real binary forms"
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Weinberg, David, et Dave Witte. « Topological equivalence of real binary forms ». Proceedings of the American Mathematical Society 112, no 4 (1 avril 1991) : 1157. http://dx.doi.org/10.1090/s0002-9939-1991-1086344-6.
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Blekherman, Grigoriy. « Typical Real Ranks of Binary Forms ». Foundations of Computational Mathematics 15, no 3 (16 octobre 2013) : 793–98. http://dx.doi.org/10.1007/s10208-013-9174-8.
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Ansola, M., A. Díaz-Cano et M. A. Zurro. « Semialgebraic sets and real binary forms decompositions ». Journal of Symbolic Computation 107 (novembre 2021) : 209–20. http://dx.doi.org/10.1016/j.jsc.2021.03.001.
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Comon, Pierre, et Giorgio Ottaviani. « On the typical rank of real binary forms ». Linear and Multilinear Algebra 60, no 6 (juin 2012) : 657–67. http://dx.doi.org/10.1080/03081087.2011.624097.
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Parkkonen, Jouni, et Frédéric Paulin. « Integral binary Hamiltonian forms and their waterworlds ». Conformal Geometry and Dynamics of the American Mathematical Society 25, no 7 (20 octobre 2021) : 126–69. http://dx.doi.org/10.1090/ecgd/362.
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We give a graphical theory of integral indefinite binary Hamiltonian forms f f analogous to the one of Conway for binary quadratic forms and the one of Bestvina-Savin for binary Hermitian forms. Given a maximal order O \mathscr {O} in a definite quaternion algebra over Q \mathbb {Q} , we define the waterworld of f f , analogous to Conway’s river and Bestvina-Savin’s ocean, and use it to give a combinatorial description of the values of f f on O × O \mathscr {O}\times \mathscr {O} . We use an appropriate normalisation of Busemann distances to the cusps (with an algebraic description given in an independent appendix), the SL 2 ( O ) \operatorname {SL}_{2}(\mathscr {O}) -equivariant Ford-Voronoi cellulation of the real hyperbolic 5 5 -space, and the conformal action of SL 2 ( O ) \operatorname {SL}_{2}(\mathscr {O}) on the Hamilton quaternions.
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Brambilla, Maria Chiara, et Giovanni Staglianò. « On the algebraic boundaries among typical ranks for real binary forms ». Linear Algebra and its Applications 557 (novembre 2018) : 403–18. http://dx.doi.org/10.1016/j.laa.2018.07.036.
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Frei, Christopher, et Efthymios Sofos. « GENERALISED DIVISOR SUMS OF BINARY FORMS OVER NUMBER FIELDS ». Journal of the Institute of Mathematics of Jussieu 19, no 1 (16 novembre 2017) : 137–73. http://dx.doi.org/10.1017/s1474748017000469.
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Estimating averages of Dirichlet convolutions $1\ast \unicode[STIX]{x1D712}$, for some real Dirichlet character $\unicode[STIX]{x1D712}$ of fixed modulus, over the sparse set of values of binary forms defined over $\mathbb{Z}$ has been the focus of extensive investigations in recent years, with spectacular applications to Manin’s conjecture for Châtelet surfaces. We introduce a far-reaching generalisation of this problem, in particular replacing $\unicode[STIX]{x1D712}$ by Jacobi symbols with both arguments having varying size, possibly tending to infinity. The main results of this paper provide asymptotic estimates and lower bounds of the expected order of magnitude for the corresponding averages. All of this is performed over arbitrary number fields by adapting a technique of Daniel specific to $1\ast 1$. This is the first time that divisor sums over values of binary forms are asymptotically evaluated over any number field other than $\mathbb{Q}$. Our work is a key step in the proof, given in subsequent work, of the lower bound predicted by Manin’s conjecture for all del Pezzo surfaces over all number fields, under mild assumptions on the Picard number.
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Bruno, Alexander Dmitrievich, et Alexander Borisovich Batkhin. « Normal form of a binary polynomial in the critical point of the second order ». Keldysh Institute Preprints, no 65 (2021) : 1–20. http://dx.doi.org/10.20948/prepr-2021-65.
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We consider a real polynomial of two variables. Its expansion in the vicinity of the zero singular point begins with the third degree form. We find its simplest forms to which this polynomial is reduced by reversible real local analytic coordinate substitutions. First, the normal forms for the cubic form are obtained using linear coordinate substitutions. There are three of them. Then three non-linear normal forms were obtained for the full polynomial. A simplification of the computation of the normal form is proposed. A meaningful example is considered.
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Jednačak, Tomislav, Aden Hodzic, Otto Scheibelhofer, Marijan Marijan, Johannes G. Khinast et Predrag Novak. « Fast real-time monitoring of entacapone crystallization and characterization of polymorphs via Raman spectroscopy, statistics and SWAXS ». Acta Pharmaceutica 64, no 1 (1 mars 2014) : 1–13. http://dx.doi.org/10.2478/acph-2014-0009.
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Abstract Crystallization of the drug entacapone from binary solvent mixtures was monitored in situ using a Raman optical probe. The recorded Raman spectra and statistical analysis, which included the principal components method and indirect hard modeling made it possible to estimate the starting point of crystallization, to assess crystallization temperatures and to provide information on the polymorphic content of the mixture. It was established that crystallization temperatures were proportional to the volume content of the solvent in mixtures. The samples were also evaluated off-line via Raman spectroscopy and SWAXS. The collected data showed the presence of forms b and g in all solvent mixtures. In a toluene/methanol 30:70 mixture, in addition to forms b and g, at least one of the forms A, D or a was also indicated by SWAXS. The results have shown that the presence of a particular polymorph is strongly dependent on the nature and portion of the solvent in the binary solvent mixture.
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Montgomery, Hugh L. « Minimal theta functions ». Glasgow Mathematical Journal 30, no 1 (janvier 1988) : 75–85. http://dx.doi.org/10.1017/s0017089500007047.
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Let be a positive definite binary quadratic form with real coefficients and discriminant b2 − 4ac = −1.Among such forms, let . The Epstein zeta function of f is denned to beRankin [7], Cassels [1], Ennola [5], and Diananda [4] between them proved that for every real s > 0,We prove a corresponding result for theta functions. For real α > 0, letThis function satisfies the functional equation(This may be proved by using the formula (4) below, and then twice applying the identity (8).)
Thèses sur le sujet "Real binary forms"
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MACCIONI, MAURO. « Tensor rank and eigenvectors ». Doctoral thesis, 2017. http://hdl.handle.net/2158/1077336.
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I investigate on the number t of real eigenvectors of a real symmetric tensor. In particular, given a homogeneous polynomial f of degree d in 3 variables, I prove that t is greater or equal than 2c+1, if d is odd, and t is greater or equal than max(3,2c+1), if d is even, where c is the number of ovals in the zero locus of f. About binary forms, I prove that t is greater or equal than the number of real roots of f. Moreover, the above inequalities are sharp for binary forms of any degree and for cubic and quartic ternary forms. Previously, I worked on the computation of the real ranks of real binary forms of degree four and five with assigned complex rank.
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Dahl, Alexander Oswald. « On Moments of Class Numbers of Real Quadratic Fields ». Thesis, 2010. http://hdl.handle.net/1807/24553.
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Class numbers of algebraic number fields are central invariants. Once the underlying field has an infinite unit group they behave very irregularly due to a non-trivial regulator. This phenomenon occurs already in the simplest case of real quadratic number fields of which very little is known.
Hooley derived a conjectural formula for the average of class numbers of real quadratic fields. In this thesis we extend his methods to obtain conjectural formulae and bounds for any moment, i.e., the average of an arbitrary real power of class numbers. Our formulae and bounds are based on similar (quite reasonable) assumptions of Hooley's work.
In the final chapter we consider the case of the -1 power from a numerical point of view and develop an efficient algorithm to compute the average for the -1 class number power without computing class numbers.
Livres sur le sujet "Real binary forms"
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Reutenauer, Christophe. From Christoffel Words to Markoff Numbers. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198827542.001.0001.
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Christoffel introduced in 1875 a special class of words on a binary alphabet, linked to continued fractions. Some years laterMarkoff published his famous theory, called nowMarkoff theory. It characterizes certain quadratic forms, and certain real numbers by extremal inequalities. Both classes are constructed by using certain natural numbers, calledMarkoff numbers; they are characterized by a certain diophantine equality. More basically, they are constructed using certain words, essentially the Christoffel words. The link between Christoffelwords and the theory ofMarkoffwas noted by Frobenius.Motivated by this link, the book presents the classical theory of Markoff in its two aspects, based on the theory of Christoffel words. This is done in Part I of the book. Part II gives the more advanced and recent results of the theory of Christoffel words: palindromes (central words), periods, Lyndon words, Stern–Brocot tree, semi-convergents of rational numbers and finite continued fractions, geometric interpretations, conjugation, factors of Christoffel words, finite Sturmian words, free group on two generators, bases, inner automorphisms, Christoffel bases, Nielsen’s criterion, Sturmian morphisms, and positive automorphisms of this free group.
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Mara, Gerald. Political Philosophy in an Unstable World. Sous la direction de Sara Forsdyke, Edith Foster et Ryan Balot. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199340385.013.39.
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For many readers, the perspectives of Plato and Thucydides are fundamentally incompatible. Plato’s authentic philosophers allegedly occupy an unchanging world of intellectual forms or ideas. Thucydides’ world is passionate and disrupted. If we agree with these assessments, we find two authors speaking such different languages that prospects for dialogue between them seem impossible. I want to challenge that conclusion by suggesting that we can read Thucydides and Plato more dialogically. I try to show how each author opens possibilities for dialogic engagement with his own text and then indicate areas of plausible exchange between them. This interactive reading avoids the binary frames of reference of abstract and illusory peace or ongoing and inescapable war, drawing attention to experiences in need of continued intellectual negotiation and opening spaces for practical improvement. Beyond expanding our understanding of these authors, such mutual readings help us to appreciate their contributions to conversational political theory.
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Smith, Philip. Narrating Global Warming. Sous la direction de Jeffrey C. Alexander, Ronald N. Jacobs et Philip Smith. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780195377767.013.28.
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This article examines global warming using the narrative genre model of risk evaluation. The narrative genre model of risk evaluation offers a systematic and comparative way of looking at the form and structure of storytelling and its consequences for human action. It is based on a number of claims, for example: uncertain events and real world facts are “clues”; we can see things as low mimetic, romantic, tragic, or apocalyptic; binary oppositions play a role as building blocks for wider storytelling activity. The article first provides a background on the issues of global warming, climate change, and greenhouse gas emissions before discussing the rise and growing acceptance of the apocalyptic genre as part of the discourse on global warming. It then considers the critique of apocalypticism, arguing that it is not only a bad genre guess that can be mocked, but also a hegemonic and anti-democratic force. It concludes with a commentary on how the narration of global warming is taking place at two levels.
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Hoste, Eric A. J., John A. Kellum et Norbert Lameire. Definitions, classification, epidemiology, and risk factors of acute kidney injury. Sous la direction de Norbert Lameire. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780199592548.003.0220_update_001.
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The lack of a precise biochemical definition of acute kidney injury (AKI) resulted in at least 35 definitions in the medical literature, which gave rise to a wide variation in reported incidence and clinical significance of AKI, impeded a meaningful comparison of studies.The first part of this chapter describes and discusses different definitions and classification systems of AKI. Patient outcome and the need for renal replacement therapy are directly related to the severity of AKI, an observation that supports the use of a categorical staging system rather than a simple binary descriptor. The severity of AKI is commonly characterized using the relative changes in serum creatinine and urine output. Recently introduced staging systems including the RIFLE classification and the Acute Kidney Injury Network (AKIN) use these relatively simple and readily available parameters allowing the assignment of individual patients to different AKI stages. More recently, a Kidney Disease: Improving Global Outcomes (KDIGO) workgroup developed a consensus-based AKI staging system drawing elements of both RIFLE and AKIN. The potential pitfalls and limitations of the proposed definitions and classifications are briefly described.The second part of the chapter describes the epidemiology of AKI in different clinical settings; the intensive care unit (ICU), the hospitalized population, and the community. The different spectrum of AKI in the emerging countries is discussed and the most important causes and aetiologies of the major clinical types of AKI, prerenal, renal, and post-renal are summarized in table form. Finally the patient survival and renal functional outcome of AKI are briefly discussed
Chapitres de livres sur le sujet "Real binary forms"
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Cannella, Fabrizia. « Femminielli and the city : urban space and non-binary gender identities in Naples ». Dans Embodying Peripheries, 200–215. Florence : Firenze University Press, 2022. http://dx.doi.org/10.36253/978-88-5518-661-2.09.
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This essay examines the interrelation between (peripheral) gender identity and (peripheral) urban space. The analysis focuses on the femminiello, a quintessentially Neapolitan non-binary subjectivity embodying a fluid sexual identity, performatively crossing across masculine and feminine, deeply connected to the territory where it originates—Naples’ inner city and its low-income historic neighborhoods. Accordingly, the essay looks at the material and immaterial interrelations between urban space and the femminiello identity. Methodologically, the study is built on a qualitative approach based mainly on fieldwork interviews with three of the most prominent femminielli of the Neapolitan context: CiroCiretta, a recognized exponent of the femminielli community and among the founders of a cultural association devoted to spreading and preserving the ancient femminiello culture; Tarantina Taran, an iconic local figure dubbed as “Naples’ last femminiello” in the city’s Spanish Quarters; and Loredana, activist and secretary of Naples’ Transsexual Association. The voices and stories of these three femminielli led us to read this non-binary gender identity in its relation to urban space, from different and complementary perspectives, which ultimately helped us trace a map of changing meaning and emerging forms of adaptation over time.
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Reutenauer, Christophe. « Markoff’s Theorem for Quadratic Forms ». Dans From Christoffel Words to Markoff Numbers, 63–68. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198827542.003.0010.
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In this chapter, Markoff’s theorem for quadratic forms is proved. These forms are real, binary, and indefinite. The two first sections are concerned with results which are reminiscent of the work of Gauss: each form is equivalent, under the action of GL2(Z), to a form having a root larger than 1, the other being between − 1 and 0. For such a form, onemay define a bi-infinite chain of forms, using the expansion into continued fractions of both roots; then the infimum of the form is equal to the infimum of the first coefficients of all these forms. In the last section,Markoff’s theoremis deduced: if three times the infimum of a formis larger than the square root of its discriminant, then the formmust be equivalent to aMarkoff form.
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McCorkle, James. « Elizabeth Bishop’s Poetics of Islandology ». Dans Reading Elizabeth Bishop, 266–79. Edinburgh University Press, 2019. http://dx.doi.org/10.3366/edinburgh/9781474421331.003.0019.
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Drawing upon Marc Shell’s Islandology and Daniel Tiffany’s Toy Medium: Materialism and Modern Lyric, this chapter explores Bishop’s meditations on place, specifically the littoral zone, and how place becomes both the poem itself and what Tiffany terms ‘lyric substance.’ As Tiffany queries, ‘is poetry merely a “place” in which real things might appear? Or could it be that bodies possess, or are possessed by something called lyric substance, a consistent and perhaps even systematic doctrine of corporeality proper to the devices of lyric poetry?’ (14-15). The instability of the littoral zone forms the basis for Bishop’s lyric aesthetic; less a boundary or a binary construction, the littoral is permeable and transforming.
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Ramasamy, Jayaraj, et Ruchi Doshi. « Machine Learning in Cyber Physical Systems for Healthcare ». Dans Real-Time Applications of Machine Learning in Cyber-Physical Systems, 65–76. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-9308-0.ch005.
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Brain tumors are prevalent and aggressive disease, with a relatively short life expectancy in their most severe form. Thus, treatment planning is an important element in improving patient quality of life. In general, image techniques such as computed tomography (CT), magnetic resonance imaging (MRI), and ultrasound imaging are used to examine tumors in the brain, lung, liver, and breast. MRI scans are used in this study to diagnose brain tumors. As a result, a reliable and automated classification technique is required to prevent death. Automatic brain tumor detection using convolutional neural networks (CNN) classification is proposed in this chapter. Small kernels are used to conduct the deeper architectural design. In machine learning, brain tumor classification is done by using a binary classifier to detect brain tumors from MRI scan images. In this chapter, transfer learning is used to build the classifier, achieving a good accuracy and visualizing the model's overall performance.
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Schwartz, Herman Mark. « States via Markets and Markets via States ». Dans Advances in Public Policy and Administration, 1–10. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-4177-6.ch001.
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Theories that the state and market are in a conflictual and binary relationship read the history of the past 30 years as a triumph of the market and a withering of the state. The underlying alleged conflict between state and market misrepresents history and reality. States and markets are commingled forms of power; each cannot exist without the other. States and markets operate on different logics and constantly mutate in response to changes in their environment. States constantly face competitive threats and need markets to generate revenue in efficient ways; market actors face competitive threats and need states to stabilize production and exchange relationships. States and market actors both need each other as a place to externalize threats to their legitimacy.
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Tamilselvi, S. « Introduction to Evolutionary Algorithms ». Dans Genetic Algorithms [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.104198.
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Real-world has many optimization scenarios with multiple constraints and objective functions that are discontinuous, nonlinear, non-convex, and multi-modal in nature. Also, the optimization problems are multi-dimensional with mixed types of variables like integer, real, discrete, binary, and having a different range of values which demands normalization. Hence, the search space of the problem cannot be smooth. Evolutionary algorithms have started gaining attention and have been employed for computational processes to solve complex engineering problems. Because it has become an instrument for research scientists and engineers who need to apply the supremacy of the theory of evolution to shape any optimization-based research problems and articles. In this chapter, there is a comprehensive introduction to the optimization field with the state-of-the-art in evolutionary computation. Though many books have described such areas of optimization in any form as evolution strategies, genetic programming, genetic algorithms, and evolutionary programming, evolutionary algorithms, that is, evolutionary computation is remarkable for considering it to discuss in detail as a general class.
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Magoulick, Mary J. « Mythic Expressions of Goddess Culture and Mythology ». Dans The Goddess Myth in Contemporary Literature and Popular Culture, 60–86. University Press of Mississippi, 2022. http://dx.doi.org/10.14325/mississippi/9781496837066.003.0003.
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Scholars like Cynthia Eller, Philip G. David, Mary Lefkowitz and contemporary feminist archaeologists (like Lynn Meskell, Lucy Goodison, Christine Morris, and others) demonstrate how goddess ideas today (what the author calls “Goddess Culture”) reveal patriarchal patterns, roots, and ideas. Specific quotes from Starhawk, Donna Read, Carol Christ and others promote the positive power of Goddess Culture. Since goddess beliefs form a popular new myth today, the author then examines some major concepts and frameworks of myth scholars to understand how myth works. Based on films, books, and quotes from Goddess practitioners and influencers (like Zsuzsanna Budapest, Margot Adler, Gimbutas, Starhawk, Joan Marler, and others), basic beliefs and characterisations of The Goddess Myth have mythological understanding applied, revealing, among other things, how the myth demonstrates many binary oppositions, both in the way the myth is told, and how it is discussed.
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Cowan, Dave. « Ruling the Pandemic ». Dans Pandemic Legalities, 15–26. Policy Press, 2021. http://dx.doi.org/10.1332/policypress/9781529218916.003.0002.
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In this chapter, a case study demonstrates how apparently binary lines between lawfulness and unlawfulness, and between formal and informal models of government have blurred. In the period until the late 1970s, when relations between central and local government were characterized as autonomous and laissez-faire, there are plenty of examples of government by circular which lacked any form of legislative backing, but which were simply accepted as providing the basis for an obligation. What the case study exposes is the way in which policy-making has blurred lines between different types of legislation, and producing entirely new ways of governing by letter, usually heralded by self-congratulatory and inaccurate tweets. Of course, it may well be said that this is the price we have to pay for governing in an emergency; and, no doubt, there is something in that. It might also be said that, certainly as far as secondary legislation is concerned, these processes have been in place for some time. The real test, however, will be how these new techniques of government are used and developed as we move out of Lockdown and back to some sort of normality in everyday life.
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Elkin, Lauren. « Across the Other Channel : Elizabeth Bowen and Modernist Mediation ». Dans Cross-Channel Modernisms, sous la direction de Claire Davison, Derek Ryan et Jane Goldman, 199–214. Edinburgh University Press, 2020. http://dx.doi.org/10.3366/edinburgh/9781474441872.003.0013.
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The Anglo-Irish writer Elizabeth Bowen has always presented a problem to critics who have wished to place her: politically conservative but socially liberated, she lived between two countries, feeling English in Ireland and Irish in England, and was, according to her one-time lover, the writer Seán Ó Faoláin, ‘heart-cloven and split-minded’ when it came to the question of national loyalty. She is, in this sense, an intensely complex writer of mediations. This essay will argue that we must read Bowen as a trans-Channel writer, not only as a frequent traveller across the English Channel (which she was) but one who moved constantly across St George’s Channel, the body of water that separates Ireland and the United Kingdom, sometimes called the Irish Channel. In their study of the literary channel and the invention of the novel, Margaret Cohen & Carolyn Dever argue for a liminal ‘Channel zone’ between England and France, where the novel takes shape as a form. I borrow this notion of a Channel zone as a liminal place where Bowen’s novels, stories, and essays flourish, and to recognize the importance of the English Channel and the Kent coastline for Bowen while also redirecting our attention to her many movements across the other, Irish Channel. My readings of Bowen’s crossings and correspondences counter Ó Faoláin’s metaphor of the split with the logic of the fold, focusing especially on Bowen's 1935 novel The House in Paris, in order to free her from the back-and-forth motion of the Anglo-Irish binary, and to open up the many passages, connections, and encounters her work enacts.
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Downey, Rod. « Turing and randomness ». Dans The Turing Guide. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198747826.003.0051.
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In an unpublished manuscript Turing anticipated by nearly thirty years the basic ideas behind the theory of algorithmic randomness, using a computationally constrained version of ‘measure theory’ to answer a question posed by Émile Borel in number theory: this question concerned constructing what are called ‘absolutely normal’ numbers. In this chapter we explain what these mysterious terms mean, and what Turing did. Mathematicians have always been fascinated with patterns in numbers. At an early stage in our education we learn about the special nature of decimal expansions of ‘rational numbers’, fractions that we can write in the form m/n, for some whole numbers m and n with n ≠ 0. The Greeks proved that some numbers, such as √2, 3√7 and √2 + √3 are not rational—indeed, it can be shown that ‘most’ numbers (in a precise mathematical sense) are irrational. It can be shown that a real number is rational if and only if it has a finite decimal expansion, or a decimal expansion that repeats from some point onwards; for example, 1/4 = 0.25 and 3/7 = 0.428571 428571 428571... . Note that we can also think of 1/4 as a repeating decimal, 0.25000000. . . ; we can also write it as 0.24999999 ... , but for simplicity we ignore such ambiguities. We can also count using bases different from 10. The binary system uses base 2, where each place in the representation corresponds to a power of 2; for example, just as 2301 in the decimal system refers to (2 × 103) + (3 × 102) + (0 × 101) + (1 × 100), so in base 2 the decimal number 13 = (1 × 23) + (1 × 22) + (0 × 21) + (1 × 20) is represented by 1101. In base 3 we use only the numbers 0, 1, 2 and express numbers using powers of 3, so the decimal number 25 = (2 × 32) + (2 × 31) + (1 × 30) is represented by 221. Note that when we use bases larger than 10 we have to invent extra symbols to represent the larger ‘digits’; for example, in base 12 we might use the digits 0, 1, 2, . . . , 9, T, E, with T and E representing ‘ten’ and ‘eleven’.
Actes de conférences sur le sujet "Real binary forms"
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Tavares, Tatiana. « Paradoxical saints : Polyvocality in an interactive AR digital narrative ». Dans LINK 2021. Tuwhera Open Access, 2021. http://dx.doi.org/10.24135/link2021.v2i1.81.
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This artistic, practice-led PhD thesis is concerned with the potentials of polyvocality and interactive digital narrative. The practical project, Saints of Paradox, is constructed as a printed picture book that can be experienced through an Augmented Reality [AR] platform. The fictional story entails a woman who mourns the disappearance of her lover in the 1964 Brazilian coup d’état and lives for 40 years in a room of accumulated memories. IIn each illustration, the user can select three buttons on the tablet device that activates a different version of the story. Three narrators (saints) present interconnected but diverging interpretations of the events shaped by their distinct theological positions. The respective values of compassion, orthodoxy, and pragmatic realism distort details of imagery, sound, movement, and meaning. AR animated vignettes, each backed by a uniquely composed cinematic soundscape, allow characters to populate the luxuriously illustrated world. Candles flicker and burn, snakes curl through breathing flowerbeds, and rooms furnished with the contents of accumulated memories pulsate with mystery. The scanned image reviews an interactive parallax that produces a sense of three-dimensional space, functioning as a technical and conceptual component. Theoretically, the story navigates relationships between the real and the imagined and refers to magical real binary modes of textual representation (Flores, 1955, Champi, 1980; Slemon, 1988, 1995; Spindler, 1993; Zamora and Faris; 1995; Bowers, 2004). Here, meaning negotiates an unreliable, sometimes paradoxical pathway between rational and irrational accounting and polyvocal narration. The dynamics between the book and the AR environments produce a sense of mixed reality (actual and virtual). The narrative experience resides primarily in an unstable virtual world, and the printed book functions as an enigmatic unoccupied vessel. Because of this, we encounter a sense of ontological reversal where the ‘virtual’ answers the ambiguities presented by the ‘real’ (the book). In the work, religious syncretism operates as a reference to Brazilian culture and an artistic device used to communicate a negotiation of different voices and points of view. The strange and somehow congruous forms of European, African, and indigenous influences merge to form the photomontage world of the novel. Fragments of imagery may be considered semiotic markers of cultural and ideological miscegenation and assembled into an ambiguous ‘new real’ state of being that suggests syncretic completeness. Methodologically, the project emanates from a post-positivist, artistic research paradigm (Klein, 2010). It is supported by a heuristic approach (Douglass and Moustakas, 1985) to the discovery and refinement of ideas through indwelling and explicitness. Thus, the research draws upon tacit and explicit knowledge in developing a fictional narrative, structure, and stylistic treatments. A series of research methods were employed to assess the communicative potential of the work. Collaboration with other practitioners enabled high expertise levels and provided an informed platform of exchange and idea progression.
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Olotu, Olabisi, Sunday Isehunwa, Bola Asiru et Zeberu Elakhame. « Development of a Real–Time Petroleum Products Aduteration Detector ». Dans SPE Nigeria Annual International Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/207127-ms.
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Abstract Adulteration of petroleum products with the resultant safety, health, environmental and economic impact is a challenge in Nigeria and many developing countries. While the commonly used techniques by regulatory agencies and some end-users for quality assurance of petroleum products are time-consuming and expensive. This study was therefore designed to develop a device for real-time detection of petroleum products adulteration. Samples of petrol, diesel and kerosene were collected; samples of water, naphtha, alcohol, pure and used lubricating oil, and High Pour Fuel Oil (HPFO) were collected and used as liquid contaminants while saw dust, ash and fine sand were used as solid particulates. At temperatures between 23-28°C (1°C interval), binary mixtures were prepared using the pure products with liquid contaminants (95:5, ..,5: 95 V/V) and with particulates (0, 2, 4, 6, 8,10 g). New mixing rules were developed for the SG and IFT of the binary liquid mixtures and compared with Kay mixing rule. Developed mathematical models of the physical-chemical properties were used to simulate a meter designed and constructed around a microcontroller with multiple input/output pins and a load cell sensor. The SG and IFT of the pure liquid and solid binary mixtures ranged from 0.810 to 1.020, 25.5 to 47.2 dynes/cm and 0.820 to 1.080 and 26.3 and 50.2 dynes/cm respectively. For products contaminated with solid particulates, SG varied between 0.860 and 0.990. The new mixing rule gave coefficient of 0.84 and 27.8 for SG and IFT compared with 0.83 and 25.6 of Kay's model. Adulteration of products was detected at 20-30% by volume and 10-20% by mass of contamination, and displayed RED for adulterated samples, GREEN for pure samples and numerical values of SG in digital form which were within ±0.01 % of actual measurements. A device for real-time detection of adulteration in petroleum products was developed which can be adapted to real-time evaluation of similar binary mixtures.
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Hereford, James M., et William T. Rhodes. « Non-ideal thresholding effects in the optical implementation of median filtering ». Dans OSA Annual Meeting. Washington, D.C. : Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.mx5.
Texte intégralRésumé :
Median filtering can be performed optically on a gray-scale input by decomposing the input into a seriesof binary cross sections, convolving each cross section with a binary kernel of the desired shape, thresholding the convolution output, and summing the filtered cross sections to form the gray-scale output. A potential problem in the optical implementation of this method is finding a spatial light modulator to perform the thresholding. We studied whether it is possible to obtain adequate results with nonideal (soft) thresholding. A numerical simulation was used to evaluate the effects of soft transfer curves with different slopes. The simulation produced a startling conclusion: It is better not to have ideal thresholding when performing median filtering. Better grayscale outputs were obtained with transfer curves that had a finite transition region rather than an ideal step response. This bodes well for the possibility of a real-time optical implementation of median filtering with real devices.
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Nassef, Ashraf O., Hesham A. Hegazi et Sayed M. Metwalli. « Design of C-Frames Using Real-Coded Genetic Optimization Algorithms and NURBS ». Dans ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/cie-9138.
Texte intégralRésumé :
Abstract C-frames constitute a large portion of machine tools that are currently used in industry. Examples of these frames include drilling machines, presses, punching and stamping machines, clamps, hooks, etc. The design parameters of these frames include the dimensions of their cross-sections, which should be chosen to withstand the applied loads and minimize the element’s overall weight. Traditionally, the cross-section of C-frame belonged to a set of primitive shapes, which included I, T, trapezoidal and rectangular sections. This paper introduces a new methodology for designing the frame’s cross-section. The cross-sectional shape is represented using non-uniform rational B-Spline (NURBS) in order to give it a form of shape flexibility. A special form of genetic algorithms known as real-coded genetic algorithms is used to conduct the search for the design objectives. Real-coded genetic algorithms are known to outperform the simple binary representation genetic algorithms when dealing with continuous search spaces. The results showed that the optimal shape was a semi I/T-section with the material bulk related to the applied load.
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Lin, Shing-Hong, Thomas F. Krile et John F. Walkup. « Optical polynomial processing based on the bilinear transform ». Dans OSA Annual Meeting. Washington, D.C. : Optica Publishing Group, 1986. http://dx.doi.org/10.1364/oam.1986.thl1.
Texte intégralRésumé :
With the motivation to extend linear/bilinear operators to a more general class of nonlinear operators via a Volterra series (polynomial) approximation, we look into optical polynomial implementations using a factored representation so that presently known bilinear techniques can be employed. Since there are two inputs and one kernel in the generalized bilinear transform, the two inputs act as polynomial input variables and the elements in the kernel represent coefficients of the quadratic polynomial. Thus higher polynomial processing can be realized by iterating the bilinear transform. A dual-LCLV system is proposed to form such a quadratic polynomial. With electronic or optical feedback, a general optical polynomial processor is achievable. The work has been extended to perform bipolar complex analog and binary digital polynomial operations. The analog operations are performed by using separate parallel channels for real/imaginary and positive/negative numbers and making use of triple matrix-matrix product processing. Systolic and wavefront processors and a triple product processor are used to implement binary digital polynomial processing.
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Dickey, F. M., B. V. K. Vijaya Kumar, L. A. Romero et J. M. Connelly. « Complex ternary matched filters yielding high signal-to-noise ratios ». Dans OSA Annual Meeting. Washington, D.C. : Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.mff6.
Texte intégralRésumé :
Matched spatial filters provide the highest output signal-to-noise ratio in pattern recognition applications but have not become practicable due to the complex nature of the spatial filters required. Lately much research effort has been devoted to methods of avoiding complex filters. This research has suggested binary and ternary real valued approximations to the phase-only filter. Dickey and Hansche1 suggested a quad-phase-only filter that does not suffer from having the simple symmetry of real valued filters and can have improved signal-to-noise ratio. The authors suggest a complex ternary matched filter (CTMF). This CTMF filter function has the form: where IR1 and IR2 are support functions, sr and S1 are the real and imaginary parts of the object function Fourier transform, and β is the threshold line angle. The algorithm introduced by Kumar and Bahri2 can be used to optimize this filter. The optimized CTMF produces signal-to-noise ratios very near the optimal phase-only filter and does not suffer from having the simple symmetry of real valued filters.
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Liu, Jianbo, Dragan Djurdjanovic et Jun Ni. « Identification and Anomaly Detection for PLC Controlled Automatic Tool Changer Using Timed Petri Net ». Dans ASME 2007 International Manufacturing Science and Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/msec2007-31222.
Texte intégralRésumé :
In this paper, a new method is proposed for incremental identification of Programmable Logic Controller (PLC) controlled tool changing process using available binary event logs obtained from the PLC. The identified discrete event model identified takes the form of a modified Timed Petri Net (TPN). A real time anomaly detection system is then constructed by synchronizing the identified TPN model with the actual tool changing process through the event sequence. Any discrepancies between the model and actual system are recognized as anomalies. The test results show that the diagnostic system automatically constructed using the newly proposed procedure is able to detect anomalies, such as incorrect timing and illegal event sequence. The same procedure has been successfully applied to monitor other PLC controlled automation processes.
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Schimbinschi, Florin, Christian Walder, Sarah M. Erfani et James Bailey. « SynthNet : Learning to Synthesize Music End-to-End ». Dans Twenty-Eighth International Joint Conference on Artificial Intelligence {IJCAI-19}. California : International Joint Conferences on Artificial Intelligence Organization, 2019. http://dx.doi.org/10.24963/ijcai.2019/467.
Texte intégralRésumé :
We consider the problem of learning a mapping directly from annotated music to waveforms, bypassing traditional single note synthesis. We propose a specific architecture based on WaveNet, a convolutional autoregressive generative model designed for text to speech. We investigate the representations learned by these models on music and concludethat mappings between musical notes and the instrument timbre can be learned directly from the raw audio coupled with the musical score, in binary piano roll format.Our model requires minimal training data (9 minutes), is substantially better in quality and converges 6 times faster in comparison to strong baselines in the form of powerful text to speech models.The quality of the generated waveforms (generation accuracy) is sufficiently high,that they are almost identical to the ground truth.Our evaluations are based on both the RMSE of the Constant-Q transform, and mean opinion scores from human subjects.We validate our work using 7 distinct synthetic instrument timbres, real cello music and also provide visualizations and links to all generated audio.
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Brodsky, Vladimir, et Moshe Shoham. « Explicit Algorithm for Robot Manipulator Dual Dynamics ». Dans ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/dac-4316.
Texte intégralRésumé :
Abstract Kinematicians have used dual numbers to obtain rigid body kinematics in a compact three-dimensional form by substituting dual for real numbers in the equation of rotational motion. No such simple relation, known as ‘principle of transference’, existed however, for dynamics. The commonly used inertia binor by which dual momentum is calculated, raises the dual dynamic equations to six dimensions. In fact, the inertia binor does not act on the dual vector as a whole, but rather on its real and dual parts as two distinct real vectors. The recently introduced dual mass operator can serve as the missing link between the dual kinematic and the dual dynamic equations. It gives the mass a dual property which has a complementary sense of Clifford’s dual unit, namely, it reduces a motor to a rotor proportional to the vector part of the motor. With this definition of mass, the same equation of momentum and its time derivative, which holds for a linear motion, holds for both linear and angular motion of a rigid body if dual force, dual velocity, and dual inertia replace their real counterparts. Application of the dual inertia operator and motor transformation rule permits derivation of an explicit dynamic algorithm of a serial manipulator which has several advantages over the more conventional Newton-Euler and Lagrange formulations. Firstly, all the expressions of this algorithm are explicit parts of the dual transformation matrices and the constant link-attached inertia parameters. Secondly, this algorithm is an explicit, not a recursive one and does not require derivative of any one of its terms. It rather gives all coefficients of the dynamic equations in a simple and compact form of determinants and vector scalar product.
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Verma, Chaman, Zoltan Illes et Veronika Stoffova. « NATION-WISE AFFILIATION PREDICTION FOR THE REAL-TIME ». Dans eLSE 2020. University Publishing House, 2020. http://dx.doi.org/10.12753/2066-026x-20-121.
Texte intégralRésumé :
To support the real-time prediction of the student demographic features such as gender, age, study level etc., in different type of online surveys and questionnaires machine learning played a vital role. In this paper, the author's applied a five supervised machine learning algorithms to predict the student's association with their home land (native) towards the technology used in their university. For this, a primary dataset has been collected with google form from the two country university (Indian and Hungarian. The present model might be useful to identify the student category based on their native nation towards their thinking for the technology in higher education. The identification of the nation affiliation might help to understand the satisfaction, usability, technology available and attitude of student for the ICT as well. The best predictive model may be deployed on real-time web module to support demographic prediction system towards ICT. Considering the binary classification problem, the student's nation wise affiliation class set to as a response variable and rest of features was considered as predictors. A student's nation wise affiliation class has two values such as Hungarian student and Indian student. In the Weka experimental environment, the primary dataset of 331 records with 38 attributes were analyzed using the Logistic Regression (LR), Support Vector Machine (SVM), Multilayer Perceptron (MP), K-nearest neighbor (KNN) and Random Forest (RF). The performances and prediction time of each classifier was compared with statistical t-test at the 0.05 confidence level. The authors performed two major experiments with training ratio and cross-validation method using these classifiers. The first experiment found no significant difference between the accuracies of the classifiers in the affiliation prediction. Also, the RF classifier outperformed others with the highest prediction accuracy of 87.56% in 0.07 seconds. The findings of the second experiment proved that the RF attained the highest prediction accuracy of 89.33% as compared to others in 0.08 seconds. This experiment also evidenced the prediction accuracies of the KNN, MP, and LR are found a significant difference as compared to the RF and SVM classifier. The statistical t-test also proved that the prediction times of the SVM, KNN, and LR found significant different than others in each experiment. Hence, the authors presented the RF model to identify the student's affiliation (Indian or Hungarian) towards technological use after made a comparison of various performance measures.