4,057 research outputs found
Numerical Analysis of Damage Iinitiation and Development in Bends of Steel Pipelines
No full textGasses and fluids are transported via an extensive infrastructure of steel pipelines. In the design of pipeline systems the use of elbows (pipe bends) is important because their flexibility makes them able to sustain significant deformations. These bends can be subjected to permanent deformations due to various load combinations which can lead to progressive material damage. There are three stages commonly observed in ductile damage: void nucleation, growth and coalescence. When subjected to varying bending loads low cycle fatigue damage may occur. Within this research project Finite Element Analysis is used to simulate the response of pipeline bends. Two element types are implemented to model a pipe bend, the classical shell element and an efficient tube element (pipe elbow element), respectively. To predict the structural response when subjected to monotonic loading a damage model is implemented for both elements. When subjected to cyclic loading three phases can be identified. During the first few cycles the permanent deformation increases rapidly. After some cycles, the rate of permanent deformation stabilizes until the point of response degradation. In order to capture this response a new material model, based upon the afore mentioned model, is proposed. Experiments have indicated that this model is well suited to determine the point of material failure.Structural MechanicsCivil Engineering and Geoscience
0749: Nelson Slade Bond Collection, 1920-2006
No full textNelson Slade Bond had a varied writing career that spanned 70 years. Primarily known for science fiction short stories, Bond also wrote plays, radio and television scripts, newspaper and magazine articles, poetry, public relations material, and books. The collection reflects the author\u27s professional and personal lives consisting of writings, correspondence, business papers and financial records from 1925 to 2005. The collection was donated in four installments during and after Bond’s life from April 2006 to September 2007. The order in which the materials were received is maintained with only minor modifications. Input from Nelson Bond and his family members was considered and utilized in processing the collection.
The collection has approximately 370 magazines containing stories published by Nelson Bond. Although Bond wrote detective and sport stories, he is primarily known as a science fiction and fantasy author from the Golden Age of science fiction contemporary to authors such as Robert Bloch, A.E. Van Vogt, Isaac Asimov, and Ray Bradbury to name a few. Magazines from 1938 to 1999 such as Planet Stories, Fantastic Adventures, Weird Tales, and Amazing Stories are included in the first seven boxes. Also included are 200 short stories, 80 television and play scripts, 200 radio scripts, six books of short stories, three novel length stories, galley proofs and magazine and newspaper articles. Memorabilia from the collection is located in the Nelson Bond Room
CLASSICAL STUDIES:TO 155-TH ANNIVERSARY OF A.E. ALEKTOROV
No full textThe article, written in the genre of the response to read the book, devoted to the 155 anniversary since the birth of A. E. Alektorov. The author attempts to comprehend and describe the publishing and pedagogical activity of A.E. Alektorov for example, fundamental bibliographic work
The A.E. Coppard Papers at Syracuse
No full textSome of the most choice collections in the Manuscript Department of Syracuse University Libraries are also among the most modest in extent. The papers of English author and poet A.E. Coppard fit into both categories. Housed comfortably in a single box, fifty-five letters, three short stories in holograph and one speech provide a close look at Coppard\u27s literary theories, criticism, opinions of his own work and that of a few others, reaction to approaches regarding dramatizing, filming or televising his prose works, dealings with publishers, and his activities on behalf of world peace through the Authors\u27 World Peace Appeal in the early 1950\u27s
Covariance matrix-based fire and flame detection method in video
No full textThis paper proposes a video-based fire detection
system which uses color, spatial and temporal information.
The system divides the video into spatio-temporal blocks and
uses covariance-based features extracted from these blocks
to detect fire. Feature vectors take advantage of both the spatial and the temporal characteristics of flame-colored regions. The extracted features are trained and tested using a support vector machine (SVM) classifier. The system does not use a background subtraction method to segment moving regions and can be used, to some extent, with non-stationary cameras. The computationally efficient method can process 320×240 video frames at around 20 frames per second in an ordinary PC with a dual core 2.2 GHz processor. In addition, it is shown to outperform a previous method in terms of detection performance
The Ethical Economy of Customer Coproduction
No full textIn this article, the author argues that customer coproduction should be understood as an expression of a large-scale trend toward the increasing power and relevance of social production. Social production consists in the self-organized systems of (mostly immaterial) production that have evolved around the diffusion of networked information and communication tech-nologies. An analysis of the genealogy of social production is shared; this includes tracing it to the process of re-mediation of social relations put in motion by the expansion of the capitalist economy into the fields of culture and consciousness and the concomitant socialization of production relations. The author then argues that social production, including customer coproduction, follows a very particular economic logic—that is, an ethical economy where value is related to social impact rather than monetary accumulation. A detailed analysis of the logic of this ethical economy is offered; it draws out some implications for the successful management of ever more customer-centric brands, whereby the consumers are directly involved in the processes that add value
Targeting versus instrument rules for monetary policy: what is wrong with McCallum and Nelson?
No full textIn their paper "Targeting versus Instrument Rules for Monetary Policy," McCallum and Nelson critique targeting rules for the analysis of monetary policy. Their arguments are rebutted here. First, McCallum and Nelson's preference to study the robustness of simple monetary policy rules is no reason at all to limit attention to simple instrument rules; simple targeting rules may have more desirable properties. Second, optimal targeting rules are a compact, robust, and structural description of goal-directed monetary policy, analogous to the compact, robust, and structural consumption Euler conditions in the theory of consumption. They express the very robust condition of equality of the marginal rates of substitution and transformation between the central bank's target variables. Indeed, they provide desirable micro foundations of monetary policy. Third, under realistic information assumptions, the instrument rule analog to any targeting rule that McCallum and Nelson have proposed results in very large instrument rate volatility and is also, for other reasons, inferior to a targeting rule.Monetary policy
Premier Bennett and Barbara Gray
No full textBarbara Gray talking to Premier Bennett at opening. Left to right: Mrs. A.E. Soles, Barbara Gray, J.A. Gray, Premier Bennett. Mrs. A.E. Soles is the wife of A.E. Soles who is/was Dean of Students and Principal, Selkirk College. Barbara Gray is/was charter student at Selkirk College, broke sod at sod-turning for Selkirk College and is the daughter of J.A. Gray. J.A. Gray is/was Chairman, Selkirk College Council. W.A.C. Bennett was the Premier of British Columbia from 1952 to 1972
A New Parametrization Of Mass Varying Neutrinos Applied In Supernovae
No full textWe propose a phenomenological model of mass varying neutrino (MaVaN) to be applied to supernovae. We consider oscillations of . νV e→νV s in this MaVaN approach and seek for possible modifications of survival probabilities. © 2012 Elsevier B.V.229-232557Fardon, R., Nelson, A.E., Weiner, N., (2004) JCAP, 410, p. 005. , arxiv:astro-ph/0309800Kaplan, D.B., Nelson, A.E., Weiner, N., (2004) Phys. Rev. Lett., 93, p. 091801. , arxiv:hep-ph/0401099Cirelli, M., Gonzalez-Garcia, M.C., Pena-Garay, C., (2005) Nucl. Phys. B, 719, p. 219. , arxiv:hep-ph/0503028de Holanda, P.C., (2009) JCAP, 907, p. 024. , arxiv:0811.0567Rossi-Torres, F., Guzzo, M.M., de Holanda, P.C., (2010) J. Phys. Conf. Ser., 203, p. 01214
Measures of hip morphology are related to development of worsening radiographic hip osteoarthritis over 6 to 13 year follow-up: the Johnston County Osteoarthritis Project
No full textObjectives We sought to describe the effect of alterations in hip morphology with respect to worsening hip OA in a community-based sample including African American (AA) and white men and women. Methods This nested case–control study defined case hips as Kellgren Lawrence grade (KLG) <3 on baseline supine pelvis radiographs and KLG ≥3 or THR for OA at the 1st or 2nd follow-up visit (mean 6 and 13 years, respectively); control hips had KLG <3 at both visits, with gender/race distribution similar to cases. Hip morphology was assessed using HipMorf software (Oxford, UK). Descriptive means and standard errors were obtained from generalized estimating equation (GEE) models. Sex-stratified GEE regression models (accounting for within-person correlation), adjusted for age, race, BMI, and side were then employed. Results A total of 120 individuals (239 hips; 71 case/168 control) were included (25% male, 26% AA, mean age 62 years, BMI 30 kg/m2). Case hips tended to have greater baseline AP alpha angles, smaller minimum joint space width (mJSW) and more frequent triangular index signs. Adjusted results among men revealed that higher AP alpha angle, Gosvig ratio, and acetabular index were positively associated with case hips; coxa profunda was negatively associated. Among women, greater AP alpha angle, smaller mJSW, protrusio acetabuli, and triangular index sign were associated with case hips. Conclusions We confirmed an increased risk of worsening hip OA due to baseline features of cam deformity among men and women, as well as protrusio acetabuli among women, and provide the first estimates of these measures in AAs
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