51 research outputs found
Design and discrete event simulation of power and free handling systems
No full textEffective manufacturing systems design and implementation has become increasingly critical, with the reduction in manufacturing product lead times, and the subsequent influence on engineering projects. Tools and methodologies that can assist the design team must be both manageable and efficient to be successful. Modelling, using analytical and mathematical models, or using computer assisted simulations, are used to accomplish design objectives. This thesis will review the use of analytical and discrete event computer simulation models, applied to the design of automated power and free handling systems, using actual case studies to create and support a practical approach to design and implementation of these types of systems. The IDEF process mapping approach is used to encompass these design tools and system requirements, to recommend a generic process methodology for power and free systems design. The case studies consisted of three actual installations within the Philips Components Ltd facility in Durham, a manufacturer of television tubes. Power and free conveyor systems at PCL have assumed increased functions from the standard conveyor systems, ranging from stock handling and buffering, to type sorting and flexible product routing. In order to meet the demands of this flexible manufacturing strategy, designing a system that can meet the production objectives is critical. Design process activities and engineering considerations for the three projects were reviewed and evaluated, to capture the generic methodologies necessary for future design success. Further, the studies were intended to identify both general and specific criteria for simulating power and free conveyor handling systems, and the ingredients necessary for successful discrete event simulation. The automated handling systems were used to prove certain aspects of building, using and analysing simulation models, in relation to their anticipated benefits, including an evaluation of the factors necessary to ensure their realisation. While there exists a multitude of designs for power and free conveyor systems based on user requirements and proprietary equipment technology, the principles of designing and implementing a system can remain generic. Although specific technology can influence detailed design, a common, consistent approach to design activities was a proven requirement In all cases. Additionally, it was observed that no one design tool was sufficient to ensure maximum system success. A combination of both analytical and simulation methods was necessary to adequately optimise the systems studied, given unique and varying project constraints. It followed that the level of application of the two approaches was directly dependent on the initial engineering project objectives, and the ability to accurately identify system requirements
ANALISIS KAPASITAS PENAMPANG SUNGAI TINGKULU DI KECAMATAN TIKALA KOTA MANADO
No full textSungai Tingkulu merupakan salah satu sungai di Kota Manado yang pernah meluap dan membanjiri beberapa daerah yang dilewatinya yang mengakibatkan kerugian bagi warga yang tinggal disekitar sungai maupun pengguna jalan raya. Oleh karena itu dalam mengantisipasi banjir yang kemungkinan akan terjadi kelak, dibutuhkan data mengenai kapasitas penampang sungai Tingkulu.Analisis dilakukan dengan mencari frekuensi hujan dengan metode Log Pearson III. Data hujan diambil dari pos hujan Tikala-Sawangan. Data curah hujan yang digunakan adalah data curah hujan harian maksimum dari tahun 2008 s/d 2017. Setelah didapat besar hujan, pemodelan hujan aliran pada program komputer HEC-HMS akan menggunakan metode HSS Soil Conservation Services, dan untuk kehilangan air dengan SCS Curve Number (CN). Untuk aliran dasar (baseflow) akan menggunakan metode recession. Dilakukan kalibrasi parameter HSS SCS sebelum melakukan simulasi debit banjir dengan menggunakan program komputer HEC-HMS. Dalam kalibrasi ini, parameter yang akan dikalibrasi adalah lag time, curve number, recession constant, baseflow dan ratio to peak. Untuk batasan setiap parameter disesuaikan dengan nilai standar pada program komputer HEC-HMS. Hasil kalibrasi menunjukan nilai Nash Sutchliffe Efficiency yang baik yaitu 0,911. Kemudian dilakukan analisis debit banjir dengan parameter terkalibrasi menggunakan program komputer HEC-HMS. Setelah itu didapat debit puncak hasil simulasi setiap kala ulang dan kemudian dimasukkan dalam program komputer HEC-RAS untuk simulasi tinggi muka air pada penampang yang telah diukur. Hasil simulasi menunjukkan bahwa semua penampang sungai Tingkulu yang ditinjau, sudah tidak mampu menampung debit banjir yang terjadi untuk kala ulang 5 tahun, 10 tahun, 25 tahun, 50 tahun, dan 100 tahun. Kata kunci : Banjir, Kapasitas Penampang Sungai, Tinggi Muka Air, HEC-HMS, HEC-RAS
The life and works of James Miller, 1704-1744, with particular reference to the satiric content of his poetry and plays.
No full textPhDJames Miller was born the son of a Dorset rector in 1704. He
was himself ordained, but acquired no benefice until just before his
early death, probably because of a scathing portrayal of the Bishop
of London in one of his verse satires. At Oxford he wrote a vivacious
comedy of humours, set in the University. Its production in 1730
began his dramatic career, at a time when the number of London
theatres had just doubled, and new dramatic forms were being invented.
In 1731 his poem Harlequin-Horace, a witty inversion of
the Ars Poetica, attacked pantomime and opera, but also painted a
lively portrait of the entire theatrical world, in the tradition of
the Dunciad.
After collaborating in a translation of Moliere's works Miller
wrote two plays based on this author. Of all his dramatic works
these were the most successful with his contemporaries, and were
followed by a modernisation of Much Ado, and a ballad-opera adapted
from an afterpiece by Jean-Baptiste Rousseau, and rendered highly
topical. Miller made similar use of a recent French comedy showing
a Red Indian's reactions to civilisation, a satiric "fable" by Walsh
and Voltaire's Mahomet. A large quantity of original material was
incorporated into most of these, and this is generally satirical in
nature. The Indian is made to voice almost egalitarian sentiments.
An afterpiece, "The Camp Visitants", satirised military inaction
in the war, and was apparently banned. The manuscripts of the six
plays produced after the Licensing Act bear the examiner's deletions,
and illustrate the nature of the censorship at this time.
Miller's greatest strength is probably his flexible, vigorously
colloquial dialogue. His political satire is mostly contained in
the poetry, which attacks Walpole's administration with increasing
vehemence through the seventeen-thirties, until its fall. In 1740
two poems that used Pope in symbolic contrast to Walpole caused a
sensation. In both poetry and plays Miller is also a social satirist,
who lays unusually strong emphasis on false taste and the deterioration
of culture
First Maltese record of Stephanopachys quadricollis (Marseul, 1879) (Coleoptera, Bostrichidae)
No full textThree specimens of Stephanopachys quadricollis (Marseul, 1878) were recently found in Malta in UV light
traps and represent the first record of this species for this country. Although S. quadricollis is native to
the Mediterranean basin, it is not yet clear if these Maltese records are due to a natural population or to
an interception. Distributional, nomenclatural and biological data on this species are summarized, and a
new synonymy is established: Stephanopachys quadricollis (Marseul, 1879) = Stephanopachys quadraticollis
Kocher, 1956, syn. n.peer-reviewe
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Rural life in English poetry of the mid-eighteenth century
No full textThis thesis examines several mid-eighteenth century poems, assessing their portrayal of rural life, its literary and historical significance, and the aesthetic and ideological issues it presents. An introductory essay on developments in rural poetry sets the scene for two extended essays. The first essay is a comparative reading of the subject of rural labour in three poems: James Thomson’s The Seasons (1726-44), Stephen Duck’s The Thresher’s Labour (1730, 1736) and Mary Collier’s The Woman’s Labour (1739). The viewpoints of a professional poet (Thomson), a farm labourer (Duck), and a working woman (Collier) are compared in relation to kinds of work all three address as well as to individual labouring subjects. The responses of the three poets to such related issues as folk traditions, forms of charity and other ‘compensations’, are also compared. Some surprising similarities as well as instructive differences are located; and an interesting picture of idealistic and realistic, male-oriented and female-oriented attitudes to labour and labour-related themes emerges
Computation of General Inner-Outer and Spectral Factorizations
No full textIn this paper, we solve two problems in linear systems theory: the computation of the inner-outer and spectral factorizations of a continuous-time system considered in the most general setting. We show that these factorization problems rely essentially on solving for the stabilizing solution a standard algebraic Riccati equation of order usually much smaller than the McMillan degree of the transfer function matrix of the system. The proposed procedures are completely general, being applicable for a polynomial/proper/improper system whose transfer function matrix could be rank deficient and could have poles/zeros on the imaginary axis or at infinity. As an application we discuss the extension to the case of rational matrices of the complete orthogonal decomposition of a constant matrix. Numerical refinements and examples illustrating the proposed approach, are discussed in detail
Heraldic Imagery in Seventeenth-Century English Poetry
No full textThe significance of heraldic references in literature has been the subject of both antiquarian interest and recent scholarship. In the field of seventeenth-century poetry, there exists a small body of published work concerned with the use of heraldry by William Shakespeare, Ben Jonson and Jolin Cleveland. The aim of this thesis is to demonstrate the existence and significance of heraldic references in a wider range of seventeenth-century verse and poetry. It eschews assumptions regarding the use of heraldry by, or with reference to, a narrow social elite, and examines heraldic references published in broadsheets and used in songs, as well as in the privately- circulated manuscripts of the nobility. Chapter One offers a critical examination of a range of current scholarship concerned with heraldic readings of literature. Chapter Two demonstrates that formal heraldic references, affirming or celebrating their subject’s identity, were used in diverse genres, including dedicatory verses, encomia, epitaphs, elegies, epithalamia and anagrams. Chapter Three determines the social implications of the use of heraldry, with particular reference to epic and satirical verse, arguing that heraldic references in this period develop beyond their traditional, chivalric associations. Chapter Four discusses those works that include heraldic references as expressions of authority or political power, and considers their use in different contexts to affirm or undermine the position of individuals and groups within society. Chapter Five establishes the use of heraldry within religious or spiritual poetry and addresses whether its vocabulary was regarded as an expression of particular Christian values. Chapter Six explores the engagement of women writers with heraldry and considers how far their use of the language offered a challenge to the prevailing patriarchal culture. The Conclusion draws attention to the significance of the evolution of heraldry from the seventeenth century to the present day
Rooted in all its story, more is meant than meets the ear : a study of the relational and revelational nature of George MacDonald's mythopoeic art
No full textScholars and storytellers alike have deemed George MacDonald a great mythopoeic writer, an exemplar of the art. Examination of this accolade by those who first applied it to him proves it profoundly theological: for them a mythopoeic tale was a relational medium through which transformation might occur, transcending boundaries of time and space. The implications challenge much contemporary critical study of MacDonald, for they demand that his literary life and his theological life cannot be divorced if either is to be adequately assessed. Yet they prove consistent with the critical methodology MacDonald himself models and promotes. Utilizing MacDonald’s relational methodology evinces his intentional facilitating of Mythopoesis. It also reveals how oversights have impeded critical readings both of MacDonald’s writing and of his character. It evokes a redressing of MacDonald’s relationship with his Scottish cultural, theological, and familial environment – of how his writing is a response that rises out of these, rather than, as has so often been asserted, a mere reaction against them. Consequently it becomes evident that key relationships, both literary and personal, have been neglected in MacDonald scholarship – relationships that confirm MacDonald’s convictions and inform his writing, and the examination of which restores his identity as a literature scholar. Of particular relational import in this reassessment is A.J. Scott, a Scottish visionary intentionally chosen by MacDonald to mentor him in a holistic Weltanschauung. Little has been written on Scott, yet not only was he MacDonald’s prime influence in adulthood, but he forged the literary vocation that became MacDonald’s own. Previously unexamined personal and textual engagement with John Ruskin enables entirely new readings of standard MacDonald texts, as does the textual engagement with Matthew Arnold and F.D. Maurice. These close readings, informed by the established context, demonstrate MacDonald’s emergence, practice, and intent as a mythopoeic writer
Translation and response between Maurice Blanchot and Lydia Davis
No full textWhen an author translates a text by another writer, this translation is one form of a response to that text. Other responses may appear in their own writings that are more inflected with their authorial persona. Lydia Davis translated six books by Maurice Blanchot, including fiction and theoretical writings. Blanchot’s concept of the récit privileges non-conventional forms of narrative and it can be considered to have influenced Davis, a view shared in critical writing about Davis. However, responses to his fiction can also be found in Davis’s work. This article reads Lydia Davis’s story “Story” as a response to Maurice Blanchot’s récit, La Folie du jour, translated by Davis as “The Madness of the Day”. Both texts develop a narrative that questions the possibility of arriving at a single story: Blanchot’s narrator cannot tell the story of how he came to have glass ground into his eyes, while Davis’s narrator must try to understand a contradictory story told to her by her lover. However, Davis responds to Blanchot by reversing the perspective in the story: where Blanchot’s narrator must and cannot create a story that explains his situation in a judicial/medical context, Davis’s narrator is struggling to understand her lover’s story which does not explain the situation that they find themselves in. Davis’s narrator is therefore motivated by an emotional need to find an acceptable story that is absent from Blanchot’s narrator. This difference in motivation is central to the difference between Davis’s and Blanchot’s approach, and complicates any reading of his influence on her because she responds to his text in her own
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