462 research outputs found

    A New Approach to Numerical Quantum Field Theory

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    In this note we present a new numerical method for solving Lattice Quantum Field Theory. This Source Galerkin Method is fundamentally different in concept and application from Monte Carlo based methods which have been the primary mode of numerical solution in Quantum Field Theory. Source Galerkin is not probabilistic and treats fermions and bosons in an equivalent manner.Comment: 10 pages, LaTeX, BROWN-HET-908([email protected]), ([email protected]), ([email protected]

    A Coding Scheme for studying group interactions in International Negotiations : a Methodological Advance on the IPA protocol

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    Open Access via the JIsc Wiley Agreement Acknowledgements We would like to thank Professor Pervez Ghauri for his contributions towards the simulation exercise that we used in this study to collect our empirical data.Peer reviewedPublisher PD

    Consortia collaboration : the view from Canada

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    The Canadian Research Knowledge Network (CRKN) is a program of Canada's universities, incorporated on April 1, 2004 as a not-for-profit organization in order to continue the work of the Canadian National Site Licensing Project (CNSLP). The mission is to expand the universe of digital research information available to Canada’s academic research community, through the coordinated services and expertise of academic libraries

    Natalie deBruijn, Soprano

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    A senior recital in partial fullfillment of the requirements for a Bachelor of Arts in Music, performed on November 12th, 2011. The repetoire included songs by Giovanni Battista Pergolesi, Georg Frideric Handel, Gabriel Faure, Antonio Salieri, Jake Heggie, and Franz Lehar

    Technology Focus: Cementing and Zonal Isolation (May 2020)

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    Diversity makes us stronger. I attended SPE's Annual Technical Conference and Exhibition last fall in Calgary and participated in a session entitled "Gender Equality in the Oil and Gas Industry - Achieving United Nations Sustainable Development Goal 5." It was a new experience for me to be part of a minority in a diverse room. Since then, I have reflected on how diversity makes us stronger. Our SPE president, Shauna Noonan, is inspiring us to "Strengthen the Core." Many of our organizations are challenging us to be more diverse; such companies have proven to be more engaging and deliver better financial results. Our teams and our technical communities also deliver superior results with diverse membership. Cementing and zonal isolation continues to be a key topic at our SPE conferences. This year, excellent papers have been presented, augmenting our knowledge and responding to the challenges of complex wells and efficiency requirements. At the same time as we "Strengthen the Core," we continue to focus on design, delivery, and evaluation of cementing operations. The selected readings include topics of design, execution, and evaluation. Cementing design is challenged in the continued investigation of materials and additives. Paper SPE 193538 poses a solution where smart vesicles are used to modify the release of chemical additives into cement. Operations are also evolving as offline cementing is becoming common. Paper SPE 196600 discusses how offline cementing can be used to save rig time. Evaluation of cement jobs continues to be an important topic, and paper SPE 199578 validates ultrasonic evaluation techniques in simulated downhole well conditions. Extra reading includes lost circulation, expanding cements, and plug and abandonment operations.I am pleased to note that each of these excellent papers includes at least one woman on the author team. In fact, one of the papers is authored by Kristin Kutchak, who has been recognized as an Outstanding Young Professional in SPE. I challenge all of us to strengthen our papers, technical teams, and organizations by continuing to include diverse populations.</jats:p

    Technology Focus: Cementing and Zonal Isolation (May 2019)

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    Technology Focus Cementing and zonal isolation are critical through the life cycle of the well. As I read through the cementing papers that were presented this year, I observed discussions on cementing and zonal isolation during drilling, completion, and abandonment activities. I am encouraged that we, as an industry, continue to refine and tweak our practices to solve zonal-isolation and cementing challenges in every well environment in which we work. Numerous papers not included here target improving cementing applications. Discussions about the mitigation of losses, low-density slurries, foam-cement slurries, spacer design, centralizer programs, expanding agents, flexible cement, and the management of narrow pressure margins are spread throughout SPE conferences. As cementing techniques are improved, so, too, are the cement-evaluation methods and work flows. The proof of zonal isolation is important to many, including resource owners, operators, regulators, land owners, and other stakeholders. As we drill longer extended-reach and horizontal wells, we continue the quest for zonal isolation using new technologies. Paper SPE 191561 discusses the mitigation of mud channels in horizontal wells drilled with nonaqueous drilling fluids. Academia has been experimenting and investigating placement practices. Recommended additional reading paper SPE 191989 explores the balance of buoyancy and eccentricity in both regular and irregular geometries. Another technology that is becoming more prevalent is the use of managed-pressure drilling, which leads to the need to understand managed-pressure cementing (MPC). Recommended additional reading paper SPE 191344 provides a case study for the use of MPC in both riserless mud recovery and con-trolled mud level applications. Abandonment is the final zonal-isolation activity in the well life cycle. The application of alternate materials continues to be discussed in all of our conferences. Paper SPE 193118 demonstrates the use of bismuth and thermite as an abandonment material. Paper SPE 191607 discusses the activation (and proof) of shales for zonal isolation. And finally, recommended additional reading paper SPE 191335 provides insight into the ultimate objective of cement-plug integrity. Recommended additional reading at OnePetro: www.onepetro.org . SPE 191989 Displacement Efficiency for Primary Cementing of Washout Sections in Highly Deviated Wells by Alondra Renteria, University of British Columbia, et al. SPE 191335 Cement Plug Hydraulic Integrity—The Ultimate Objective of Cement Plug Integrity by Axel-Pierre Bois, CURISTEC, et al. SPE 191344 Experience Using Managed-Pressure Cementing Techniques With Riserless Mud Recovery and Controlled Mud Level in the Barents Sea by E. Claudey, Enhanced Drilling, et al. SPE 193965 Caprock Restoration in Well Abandonment: Fit-for-Purpose Well-Abandonment Design Through Work Flow Optimization and Integrated Assessment by Jing Zhi Kueh, Petronas, et al.</jats:p
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