6,031 research outputs found
CONSIDERATIONS ON SEISMIC HAZARD DISAGGREGATION IN TERMS OF OCCURRENCE OR EXCEEDANCE IN NEW ZEALAND
No full textCapacity Design of Coupled RC Walls
No full textCapacity design is an important tool that enables controlled ductile response of structures when subjected to earthquakes. The need for specific capacity design requirements for walls coupled by deep coupling beams, however, is often overlooked and it is assumed in some instances that the same equations used for cantilever walls will give satisfactory results when applied to coupled walls. Furthermore, existing equations for capacity design incorporated into codes and design guides were developed a number of years ago and no longer represent the state-of-the-art. This research investigates the performance of existing capacity design equations for coupled walls and then proposes a new simplified capacity design method based on state-of-the-art-knowledge. The proposed method is then verified through a case study in which a set of 15 coupled walls were analysed using non-linear time-history analyses. Following this, an investigation is made into how the maximum shear force in an individual wall relates to the maximum shear force in the coupled wall system.EES
Citation expectations: are they realized? Study of the Matthew index for Russian papers published abroad
No full textWe consider the "Matthew effect" in the citation process which leads to reallocation (or misallocation) of the citations received by scientific papers within the same journals. The case when such reallocation correlates with a country where an author works is investigated. Russian papers in chemistry and physics published abroad were examined. We found that in both disciplines in about 60% of journals Russian papers are cited less than average ones. However, if we consider each discipline as a whole, citedness of a Russian paper in physics will be on the average level, while chemistry publications receive about 16% citations less than one may expect from the citedness of the journals where they appear. Moreover, Russian chemistry papers mostly become undercited in the leading journals of the field. Characteristics of a "Matthew index" indicator and its significance for scientometric studies are also discussed
Cwbr Author Interview: Aiming For Pensacola: Fugitive Slaves On The Atlantic And Southern Frontiers
No full textInterview with Matthew J. Clavin, author of Aiming for Pensacola: Fugitive Slaves on the Atlantic and Southern Frontiers Interviewed by Tom Barber Civil War Book Review (CWBR): Today the Civil War Book Review is happy to speak with Matthew J. Clavin, associate professor of history at the U...
Application of a recently proposed displacement-based assessment procedure for asymmetric-plan RC wall buildings
No full textArchitectural layouts of reinforced concrete buildings often require structural walls, with varying dimensions, to be placed in an asymmetric plan configuration. During seismic excitation the asymmetry induces a torsional component of response, which can impact negatively on the performance of the building by increasing demands on both structural and nonstructural elements. Furthermore, the torsional response can render existing assessment procedures less effective at providing an accurate estimate of engineering demand parameters. In this paper a recently proposed displacement-based assessment procedure, developed specifically for asymmetric-plan RC wall buildings, is applied to a case study structure. The method is based on a combination of two existing approaches, with the first being used to predict displacement demands in symmetric reinforced concrete wall buildings, and the second being used to account for torsional response in 2D asymmetric-plan systems. One of the key aspects of the procedure is the concept of assigning effective stiffness properties to the walls. In doing so the method is able to account for the influence of not only stiffness eccentricities but also strength eccentricities, which have been shown to play the more important role during inelastic response. Higher-mode effects, which can have a strong influence on a number of engineering demand parameters, are accounted for using existing simplified expressions. The case study structure under consideration is an eight storey RC wall building designed in accordance with Eurocode 8. It is modelled using a lumped plasticity approach and then assessed using nonlinear response-history analysis over a range of increasing intensity levels to establish benchmark estimates of several relevant engineering demand parameters. The new displacement-based assessment procedure is then used to assess the building in an equivalent incremental framework. The analyses are then repeated with Modal Pushover Analysis to provide another point of reference for evaluating the new approach. Comparison of the results shows that the newly proposed procedure performs to a satisfactory level in predicting displacement demands and wall shear forces in the case study building. Discussion is given on the relative merits and drawbacks of the new approach. One of the most significant advantages is that it can deal with what is arguably a highly complex analysis problem without the need of a numerical model. Its major disadvantages are that it is iterative and in its current form cannot account for bidirectional eccentricities of bidirectional excitation. However, it is deemed that the good results obtained in reference to the case study building and its appealing theoretical basis warrant its further development.EES
H-Diplo Roundtable XX-20 on Matthew J. Ambrose. The Control Agenda: A History of the Strategic Arms Limitation Talks
No full textA set of reviews of Matthew J. Ambrose\u27s The Control Agenda: A History of the Strategic Arms Limitation Talks, with a response from the author
A case study in the capacity design of RC coupled walls
No full textIn the seismic design of structures, capacity design is typically employed to ensure that a desirable ductile response is obtained. In this paper three different capacity design approaches for reinforced concrete coupled walls are investigated. For a simple case study building, the expected capacity design shear forces and bending moments are calculated using the different approaches. The results are then assessed against the corresponding actions found from nonlinear time-history analysis. The performance of each approach is discussed, along with some of the difficulties associated with undertaking the capacity design of coupled walls.EES
Exploring the probability of collapse of RC frame structures designed to current New Zealand Standards
No full textSt. Matthew Island colonized through multiple long-distance red fox (<i>Vulpes</i> <i>vulpes</i>) dispersal events
No full text Expansion of red fox (Vulpes vulpes (L., 1758)) into new arctic habitat and the potential for competition with arctic fox (Vulpes lagopus (L., 1758)) are of considerable conservation concern. Previous work has focused on red fox expanding into contiguous areas with few barriers to dispersal. Here, we examine mitochondrial DNA in red fox on recently colonized St. Matthew Island in the Bering Sea to determine their ultimate origin. Though limited in sample size (n = 7), we found that St. Matthew Island was colonized by North American lineages; surprisingly, despite the >400 km distance to the mainland, we found the island was colonized by at least three mitochondrial matrilines. These results suggest that even extremely isolated places may be colonized by red fox, and that the over-ice or over-ocean dispersal ability of red fox may have been previously underappreciated. </jats:p
Matthew Fox's 2020 Reissued Book on Thomas Aquinas, and Walter J. Ong's Thought
No full textSee the above abstract.My 3,600-word essay "Matthew Fox's 2020 Reissued Book on Thomas Aquinas, and Walter J. Ong's Thought" is about the Reverend Dr. Matthew Fox's 1992 550-page book Sheer Joy: [Four] Conversations with Thomas Aquinas on Creation Spirituality, which has just been reissued by Dover Publications. I discuss it not only in connection with the thought of the American Jesuit Renaissance specialist and cultural historian Walter J. Ong (1912-2003; Ph.D. in English, Harvard University, 1955), but also in connection with the thought of the Canadian Catholic convert and Renaissance specialist and Thomist Marshall McLuhan (1911-1980; Ph.D. in English, Cambridge University, 1943), whose 1962 at times flawed book The Gutenberg Galaxy: The Making of Typographic Man is still controversial. In the second part of my review essay, I quote twenty passages from Aquinas' thought that Fox has culled from 52 works by Aquinas in Latin, and I suggested certain related reading in connection with each quotation.N/AFarrell, Thomas J. (2020). Matthew Fox's 2020 Reissued Book on Thomas Aquinas, and Walter J. Ong's Thought. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/213541
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