1,354,407 research outputs found
Was Vardon Right ?
No full textAbstract. Following a personal experience of the beneficial effects of using the "Vardon Swing" in golf, the author has provided an analytical verification of the superiority of such an approach. The method used is essentially that due to M. Aicardi [3] however, the implementation using a more classical derivation of the equations of motion and the use of a spreadsheet with a built in optimization routine makes golf swing analysis available to a wider public
Probabilistic performance assessment of a deep tunnel for a radioactive waste repository in French COx claystone
No full textA preliminary probabilistic study of the stability of a circular drift excavated for a radioactive waste repository in the French Callovo-Oxfordian claystone is presented and discussed. An analytical mechanical model assuming isotropic elastic behaviour and linear plastic softening was used. Particular emphasis here is placed on the uncertainty of mechanical property values. The test results from several laboratories showed considerably variable property values and they have been interpreted statistically in this investigation. The obtained statistical results were used in a Monte Carlo framework. The performance of the drift was evaluated in terms of the probability of threshold exceedance in the extent of the plastic zone.Geo-engineerin
Coupled thermo–hydro–mechanical processes for the Dutch radioactive waste repository
No full textDisposal of spent nuclear fuel and long lived radioactive waste in deep clay geological formations is one of the promising options worldwide. In this concept of the geological disposal system, the Boom Clay is considered as a potential host rock when designing a generic waste repository in the Netherlands. For design and evaluation of a repository for geologic disposal of nuclear wastes one of its principal concern is the thermal loading. High-level radioactive waste and spent fuel generate considerable amounts of heat. When those waste types are disposed in a geological repository the elevated thermal effect on the behaviour of soils surrounding nuclear waste disposal give rise to change in hydraulic and mechanical properties is a significant factor for repository design. Understanding these time-dependent phenomena processes in relation to both the effects of pore water dissipation and of the thermal expansion is essential for reliably assessing repository performance and evaluating the safety case. This paper presents some of the investigation on the thermal processes with emphasis on the coupled Thermo-Hydro- Mechanical (THM) processes for the disposal concept of a radioactive waste disposal facility, in Boom Clay at a depth of about 500m.Geo-engineerin
Low - Smith - Ray - Vardon
No full textPhoto shows George Low, Alex Smith, Ted Ray, and Harry Vardon playing golf, probably at Baltusrol Golf Club, Springfield, N.J., in a qualifying round for the 1913 U.S. open held in Brookline, Massachusetts. (Source: Flickr Commons project, 2010 and New York Times, Sept. 14, 1913)Title and date from data provided by the Bain News Service on the negative.Forms part of: George Grantham Bain Collection (Library of Congress).General information about the Bain Collection is available at http://hdl.loc.gov/loc.pnp/pp.ggbai
A catalogue of a choice collection of prints and drawings, the property of a gentleman [M. Vardon]
No full text[Vente (Art). 1808-02-12. Londres][Collection (Art). Vardon. 1808
The Thermal Cone Penetration Test Potentials in Soil Investigation
No full textThe widely used cone penetration test (CPT) allows in-situ measurements of soil behaviour during continuous penetration. The traditional sensors incorporated in a cone penetrometer are for measuring cone resistance, sleeve friction, pore pressure, and inclination. Many supplementary sensors have been studied and tried in research settings and in practice. Examples are sensors for natural gamma radiation, electrical resistivity and time domain reflectometry. None have made it to routine practice. As an introduction to the thermal cone penetration test, this thesis presents a review of CPT add-on sensors that (1) allow continuous penetration at 20 mm/s, (2) considered robust, i.e. have no external moving parts, (3) offer potential for broad geotechnical value, i.e. not limited to special applications only. The review considers recent advances in electronics, sensor technology, and data processing systems. The Thermal Cone Penetration test (T-CPT) was introduced by Akrouch (2016) using temperature decay test to determine the soil thermal conductivity. An improved interpretation model was proposed by Vardon (2018) and validated via an in-situ testing programme (Vardon et al., 2018). The T-CPT records temperature variations during continuous penetration depending on different factors such as soil type (grain size), soil strength, and thermal properties of soils. In this report, the potentials of the thermal cone penetration test prototype developed and used by Fugro are investigated during continuous penetration conditions in order to determine the possible dependencies between the soil engineering properties and the T-CPT measurements.Geo-Engineerin
Optimizing Energy Quay Walls: Insights from Comprehensive Thermal Analysis and Turbulent Flow Enhancement
No full textIn recent decades, there has been a notable rise in the utilization of the subsurface as a source for heating and cooling through shallow geothermal installations. This trend is exemplified by the emergence of Energy Geostructures (EGs), an innovative technology that not only provides structural support to the ground or buildings but also facilitates the exchange of heat with the subsurface. EGs offer versatile applications for various energy needs, including their integration with ground source heat pumps for space heating, cooling, and domestic hot water provision.Energy Quay Walls (EQWs) represent a promising type of energy Geostructures that demonstrate a unique ability to exchange heat with both the surrounding soil and open water. Despite the considerable potential for energy efficiency that EQWs hold, their limited implementation underscores the need for extensive research to comprehend their thermal behavior.This study conducts an in-depth examination of EQWs, employing two Finite Element numerical models to reconstruct the undisturbed temperature profile within the soil and conduct a detailed 3D analysis of heat exchange processes in an EQW application. These models are validated using real data obtained from a full-scale test in Delft, The Netherlands. The results emphasize the significance of transitioning from laminar to turbulent flow regimes within the heat exchanger pipes, showcasing improved energy extraction efficiency, particularly from the open water layer.Moreover, the study underscores the critical role of open water movement in the energy extraction process. This finding emphasizes the dynamic nature of open water in contributing to the overall effectiveness of EQWs as an EG. The study's outcomes provide important considerations for optimizing the design and implementation of EQWs, pointing towards the benefits of promoting turbulent flow regimes within the heat exchanger pipes and emphasizing the advantages of harnessing energy from actively moving open water layers. As the implementation of EQWs continues to expand, these insights contribute to advancing our understanding and enhancing the energy efficiency of this innovative technology.Geo-engineerin
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Hunger for Movement and Action—Sue Vardon, AO
No full textSue Vardon spent 23 years as a chief executive (CE) in federal and state government agencies. She has an honorary doctorate from the University of South Australia and has been an adjunct professor at both Canberra University and the University of South Australia and was the inaugural Telstra Australian Business Woman of the Year in 1995. She was educated as a social worker at the University of New South Wales and worked in local government in NSW, both metropolitan and country. She held senior positions in the NSW Department for Community Services before moving to South Australia to become the Director General of Community Welfare. This was followed by the CE of the Office of Public Sector Reform, the Public Service Commissioner and the CE of the Department for Correctional Services in South Australia. She was the inaugural CE of Centrelink, which was established in 1997, and her last position was CE of the South Australian Department for Families and Communities, bringing together housing, disability, domiciliary care and family services. Included in this work was her role as State Recovery Co-ordinator and Chair of the National Community Services and Disability Administrators Disaster Recovery Group. Sue’s inspirational story demonstrates her strength of character and shrewdness in choice of strategy
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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