Relevant bibliographies by topics / Lifting property

Academic literature on the topic 'Lifting property'

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Published: 4 June 2021
Last updated: 31 January 2023

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Journal articles on the topic "Lifting property"

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Macheras, N. D., and W. Strauss. "On products of almost strong liftings." Journal of the Australian Mathematical Society. Series A. Pure Mathematics and Statistics 60, no. 3 (June 1996): 311–33. http://dx.doi.org/10.1017/s1446788700037836.

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AbstractDealing with a problem posed by Kupka we give results concerning the permanence of the almost strong lifting property (respectively of the universal strong lifting property) under finite and countable products of topological probability spaces. As a basis we prove a theorem on the existence of liftings compatible with products for general probability spaces, and in addition we use this theorem for discussing finite products of lifting topologies.
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Giraldo, Antonio. "Shape Fibrations, Multivalued Maps and Shape Groups." Canadian Journal of Mathematics 50, no. 2 (April 1, 1998): 342–55. http://dx.doi.org/10.4153/cjm-1998-018-7.

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AbstractThe notion of shape fibration with the near lifting of near multivalued paths property is studied. The relation of thesemaps–which agreewith shape fibrations having totally disconnected fibers–with Hurewicz fibrations with the unique path lifting property is completely settled. Some results concerning homotopy and shape groups are presented for shape fibrations with the near lifting of near multivalued paths property. It is shown that for this class of shape fibrations the existence of liftings of a fine multivalued map is equivalent to an algebraic problem relative to the homotopy, shape or strong shape groups associated.
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Georgescu, George, and Claudia Mureşan. "Factor Congruence Lifting Property." Studia Logica 105, no. 1 (October 15, 2016): 179–216. http://dx.doi.org/10.1007/s11225-016-9687-7.

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Nagel, Uwe. "Lifting the k-Buchsbaum property." Journal of Pure and Applied Algebra 152, no. 1-3 (September 2000): 267–73. http://dx.doi.org/10.1016/s0022-4049(99)00130-9.

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Cheptea, Daniela, and George Georgescu. "Boolean lifting property in quantales." Soft Computing 24, no. 8 (February 15, 2020): 6169–81. http://dx.doi.org/10.1007/s00500-020-04752-8.

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Han, Sang-Eon. "Unique pseudolifting property in digital topology." Filomat 26, no. 4 (2012): 739–46. http://dx.doi.org/10.2298/fil1204739h.

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The generalized universal lifting property plays an important role in classical topology. In digital topology we also have its digital version [5, 6, 14]. More precisely, the paper [6] established the concept of a digital covering (see also [11, 17]). It has substantially contributed to the calculation of digital fundamental groups of some digital spaces, the classification of digital spaces and so forth. The paper [6] also established the unique lifting property of a digital covering which plays an important role in studying both digital covering and digital homotopy theory. Motivated by the unique lifting property, the paper develops a pseudocovering which is weaker than a digital covering and investigates its various properties. Furthermore, the paper proves that a pseudocovering with some hypothesis has the unique pseudolifting property which is weaker than the unique lifting property in digital covering theory.
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Majid, Mohammed, and Ghafur Abd. "Principally supplemented module and lifting property." International Journal of Physical Sciences 8, no. 19 (May 23, 2013): 967–72. http://dx.doi.org/10.5897/ijps2013.3856.

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Georgescu, George, and Claudia Mureşan. "Boolean lifting property for residuated lattices." Soft Computing 18, no. 11 (July 16, 2014): 2075–89. http://dx.doi.org/10.1007/s00500-014-1318-5.

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Kermani, Neda Arjomand, Esfandiar Eslami, and Arsham Borumand Saeid. "Central lifting property for orthomodular lattices." Mathematica Slovaca 70, no. 6 (December 16, 2020): 1307–16. http://dx.doi.org/10.1515/ms-2017-0433.

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AbstractWe introduce and investigate central lifting property (CLP) for orthomodular lattices as a property whereby all central elements can be lifted modulo every p-ideal. It is shown that prime ideals, maximal ideals and finite p-ideals have CLP. Also Boolean algebras, simple chain finite orthomodular lattices, subalgebras of an orthomodular lattices generated by two elements and finite orthomodular lattices have CLP. The main results of the present paper include the investigation of CLP for principal p-ideals and finite direct products of orthomodular lattices.
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Chinburg, T., R. Guralnick, and D. Harbater. "Oort groups and lifting problems." Compositio Mathematica 144, no. 4 (July 2008): 849–66. http://dx.doi.org/10.1112/s0010437x08003515.

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AbstractLet k be an algebraically closed field of positive characteristic p. We consider which finite groups G have the property that every faithful action of G on a connected smooth projective curve over k lifts to characteristic zero. Oort conjectured that cyclic groups have this property. We show that if a cyclic-by-p group G has this property, then G must be either cyclic or dihedral, with the exception of A4 in characteristic two. This proves one direction of a strong form of the Oort conjecture.
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Dissertations / Theses on the topic "Lifting property"

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Mackie, Finlay. "Food Waste, Shop Lifting and Dumpster Diving : Ethical Conceptions of Waste and the Re-Appropriation of Goods." Thesis, Linköpings universitet, Centrum för tillämpad etik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-107699.

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This paper examines two contrasting ethical approaches to waste within the context of modern day western food poverty and attempts to examine the justifications that these ethical definitions of waste might lend to impoverished people in re-appropriating the wasted food for themselves. Towards the end of the paper there is also a brief discussion regarding the political implications that can be found in competing ethical definitions of waste.
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Kennedy, Ryan. "LIFTING THE CURSE: DISTRIBUTION AND POWER IN PETRO-STATES." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1211481058.

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Boskovitz, Agnes, and abvi@webone com au. "Data Editing and Logic: The covering set method from the perspective of logic." The Australian National University. Research School of Information Sciences and Engineering, 2008. http://thesis.anu.edu.au./public/adt-ANU20080314.163155.

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Errors in collections of data can cause significant problems when those data are used. Therefore the owners of data find themselves spending much time on data cleaning. This thesis is a theoretical work about one part of the broad subject of data cleaning - to be called the covering set method. More specifically, the covering set method deals with data records that have been assessed by the use of edits, which are rules that the data records are supposed to obey. The problem solved by the covering set method is the error localisation problem, which is the problem of determining the erroneous fields within data records that fail the edits. In this thesis I analyse the covering set method from the perspective of propositional logic. I demonstrate that the covering set method has strong parallels with well-known parts of propositional logic. The first aspect of the covering set method that I analyse is the edit generation function, which is the main function used in the covering set method. I demonstrate that the edit generation function can be formalised as a logical deduction function in propositional logic. I also demonstrate that the best-known edit generation function, written here as FH (standing for Fellegi-Holt), is essentially the same as propositional resolution deduction. Since there are many automated implementations of propositional resolution, the equivalence of FH with propositional resolution gives some hope that the covering set method might be implementable with automated logic tools. However, before any implementation, the other main aspect of the covering set method must also be formalised in terms of logic. This other aspect, to be called covering set correctibility, is the property that must be obeyed by the edit generation function if the covering set method is to successfully solve the error localisation problem. In this thesis I demonstrate that covering set correctibility is a strengthening of the well-known logical properties of soundness and refutation completeness. What is more, the proofs of the covering set correctibility of FH and of the soundness / completeness of resolution deduction have strong parallels: while the proof of soundness / completeness depends on the reduction property for counter-examples, the proof of covering set correctibility depends on the related lifting property. In this thesis I also use the lifting property to prove the covering set correctibility of the function defined by the Field Code Forest Algorithm. In so doing, I prove that the Field Code Forest Algorithm, whose correctness has been questioned, is indeed correct. The results about edit generation functions and covering set correctibility apply to both categorical edits (edits about discrete data) and arithmetic edits (edits expressible as linear inequalities). Thus this thesis gives the beginnings of a theoretical logical framework for error localisation, which might give new insights to the problem. In addition, the new insights will help develop new tools using automated logic tools. What is more, the strong parallels between the covering set method and aspects of logic are of aesthetic appeal.
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Basten, Sebastian [Verfasser]. "The arithmetic lifting property for nilpotent groups / vorgelegt von Sebastian Basten." 2011. http://d-nb.info/1011486407/34.

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Boskovitz, Agnes. "Data Editing and Logic: The covering set method from the perspective of logic." Phd thesis, 2008. http://hdl.handle.net/1885/49318.

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Errors in collections of data can cause significant problems when those data are used. Therefore the owners of data find themselves spending much time on data cleaning. This thesis is a theoretical work about one part of the broad subject of data cleaning - to be called the covering set method. More specifically, the covering set method deals with data records that have been assessed by the use of edits, which are rules that the data records are supposed to obey. The problem solved by the covering set method is the error localisation problem, which is the problem of determining the erroneous fields within data records that fail the edits. In this thesis I analyse the covering set method from the perspective of propositional logic. ...
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Books on the topic "Lifting property"

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1946-, Clinton Bill, and United States. Congress. House. Committee on International Relations., eds. Lifting and modifying measures with respect to the Federal Republic of Yugoslavia (Serbia and Montenegro): Communication from the President of the United States transmitting his report issuing a new executive order to lift, with respect to future transactions, the economic sanctions imposed pursuant to Executive Order 13088 and expanded by Executive Order 13121. Washington: U.S. G.P.O., 2001.

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Conning & Company., ed. The property casualty underwriting cycle: Lifting the veil of abnormal losses. [Hartford, CT]: Conning & Company, 1996.

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Abbes, Ahmed, Michel Gros, and Takeshi Tsuji. Almost étale coverings. Princeton University Press, 2017. http://dx.doi.org/10.23943/princeton/9780691170282.003.0005.

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This chapter explains Faltings' theory of almost étale extensions, a tool that has become essential in many questions in arithmetic geometry, even beyond p-adic Hodge theory. It begins with a brief historical overview of almost étale extensions, noting how Faltings developed the “almost purity theorem” and proved the Hodge–Tate decomposition of the étale cohomology of a proper smooth variety. The chapter proceeds by discussing almost isomorphisms, almost finitely generated projective modules, trace, rank and determinant, almost flat modules and almost faithfully flat modules, almost étale coverings, almost faithfully flat descent, and liftings. Finally, it describes group cohomology of discrete A–G-modules and Galois cohomology.
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Book chapters on the topic "Lifting property"

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Brown, Nathanial, and Narutaka Ozawa. "Weak expectation property and local lifting property." In Graduate Studies in Mathematics, 375–91. Providence, Rhode Island: American Mathematical Society, 2008. http://dx.doi.org/10.1090/gsm/088/13.

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Averkov, Gennadiy, and Amitabh Basu. "On the Unique-Lifting Property." In Integer Programming and Combinatorial Optimization, 76–87. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07557-0_7.

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Plaza, Jan A. "Soundness and completeness versus lifting property." In Artificial Intelligence and Symbolic Mathematical Computation, 354–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/3-540-61732-9_68.

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Nian, Hongen, Xiang Li, Xiaoling Tan, Xiufeng Ren, and Jinbo Zeng. "Preparation of YBO3:Ce3+ Film via Impregnation-Lifting Method and Its Photoluminescence Property." In Advances in Powder and Ceramic Materials Science, 127–33. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36552-3_13.

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"The Local Lifting Property (LLP)." In Introduction to Operator Space Theory, 275–84. Cambridge University Press, 2003. http://dx.doi.org/10.1017/cbo9781107360235.017.

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Ng, K. F., and L. S. Liu. "A Note on A Lifting Property for Convex Processes." In North-Holland Mathematics Studies, 189–90. Elsevier, 1988. http://dx.doi.org/10.1016/s0304-0208(08)71337-9.

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Waldhausen, Friedhelm, Bjørn Jahren, and John Rognes. "On simple maps." In Spaces of PL Manifolds and Categories of Simple Maps (AM-186). Princeton University Press, 2013. http://dx.doi.org/10.23943/princeton/9780691157757.003.0003.

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This chapter deals with simple maps of finite simplicial sets, along with some of their formal properties. It begins with a discussion of simple maps of simplicial sets, presenting a proposition for the conditions that qualify a map of finite simplicial sets as a simple map. In particular, it considers a simple map as a weak homotopy equivalence. Weak homotopy equivalences have the 2-out-of-3 property, which combines the composition, right cancellation and left cancellation properties. The chapter proceeds by defining some relevant terms, such as Euclidean neighborhood retract, absolute neighborhood retract, Čech homotopy type, and degeneracy operator. It also describes normal subdivision of simplicial sets, geometric realization and subdivision, the reduced mapping cylinder, how to make simplicial sets non-singular, and the approximate lifting property.
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Solari, Raffaele, Patrizia Bagnerini, and Giuliano Vernengo. "On the Application of a Vortex Lattice Method to Lifting Bodies Close to a Free Surface." In Progress in Marine Science and Technology. IOS Press, 2022. http://dx.doi.org/10.3233/pmst220079.

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The interaction of the free surface with either lifting and non lifting, submerged, bodies moving beneath it is of primary interest in naval architecture. Indeed, there are many examples of possible applications such as rudders, stabilizer fins, hydrofoils among the others. The hydrodynamic problem of a submerged lifting body moving close to a free surface presents several complexities that need to be properly addressed in order to achieve a reliable solution. The problem is studied in the framework of a potential flow theory and solved by using an ad-hoc developed Vortex Lattice Method (VLM). The developed method is described and validated by comparison against available data on a flat plate. The analysis then focuses on the convergence properties of the method, especially with respect to the panel dimensions used for the free surface discretization, and on a sensitivity with respect to some peculiar operating parameters such as the depth of the body with respect to the free surface and the angle of attack with respect to the incoming flow.
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Thorsen, Isak. "Pornography and Censorship." In A History of Danish Cinema, 140–48. Edinburgh University Press, 2021. http://dx.doi.org/10.3366/edinburgh/9781474461122.003.0012.

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In the summer of 1969, Denmark was the first country in the world to legalise visual pornography. This chapter outlines the history of film censorship in Denmark, examining how socio-cultural change led to gradual testing of legal limits. The immediate impact of the lifting of censorship was a short-lived ‘porn monopoly’, gaining the country an international reputation as uniquely licentious. The chapter addresses how mainstream Danish feature films of the late 1960s and early 1970s incorporated and commercialised the transgressive potential of sex and pornography in three main ways: in porn films proper, in documentary-like films, and in the highly popular national sex comedies.
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Van Vo, Nhan, Nguyen Quan Pham, Chien Dac Ho, Son Van Le, and Ha Manh Nguyen. "A New Technique of Two Iliac Cortical Bone Blocks Sandwich Technique for Secondary Alveolar Bone Grafting in Cleft Lip and Palate Patients." In Recent Advances in the Treatment of Orofacial Clefts [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99109.

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Alveolar cleft bone graft in the second stage of surgery was a crucial part of the cleft palate treatment protocol with many advantages: reconstructing bone for tooth eruption, supporting the periodontal structure for the teeth adjacent to the cleft, supporting and lifting the arch and preventing from collapsing of maxillary arch. Grafting technique and material are selected based on the treatment purpose that for orthodontic moving tooth into the arch or for dental implant rehabilitation. Cancellous material provides rapid vascularization and healing facilitating for tooth moving into the cleft site but easy to resorb that unsuitable for dental implant placement. While dense material is difficult to move teeth into the cleft but increase initial stability. Therefore, we offered a method that limit bone resorption, easily obtain the implant initial stability, quick osseointegration called two iliac cortical bone blocks sandwich technique for a purposes of dental implant rehabilitation. Treatment protocol started with orthodontic treatment prior alveolar bone grafting to create proper space for implant restoration. Our clinical experience with 32 cleft sites using two iliac cortical bone blocks sandwich had shown potential clinical application in follow-up time up to 96 months. Evaluation criteria of bone grafting for alveolar cleft included soft tissue condition of graft area, nasal fistula closure, bone grafting outcome, success in osseointegration and implant prosthesis. This chapter described in detail treatment procedure and outcomes of a new technique of two iliac cortical bone blocks sandwich for alveolar cleft in patients with unilateral cleft palate.
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Conference papers on the topic "Lifting property"

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Xie, Cheng Jun, Su Yan, and Yang Xiang. "Property study of integer wavelet transform lossless compression coding based on lifting scheme." In ICO20:Remote Sensing and Infrared Devices and Systems, edited by Jingshan Jiang, O. Y. Nosach, and Jiaqi Wang. SPIE, 2006. http://dx.doi.org/10.1117/12.668033.

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Zhao, Shujie, Zhen Gao, Dejiang Li, and Xun Meng. "Dynamic Property of a Floating Multi-Body System for Dual Barge Float-Over Operation With a Mechanical TLS (Topside Lifting System)." In ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/omae2022-78400.

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Abstract TLS (Topsides Lifting System) utilization is a modern fast lifting technology developed for offshore platform installation. The positive prospects have seen from its sound and efficient performance at the offshore operation. To improve the feasibility of dual barge float-over operations, two new individual barges are designed in application with TLS. The targeting TLS system is equipped with motion compensation system that consists of several sets of lifting beams. Because the flexible mechanical couplings and the hydrodynamic interactions between bodies, the dynamic characteristics of system will be more complex. Some of the eigen modes might be excited by wave loads and could potentially lead to large responses. To demonstrate the dynamic properties of the new operation mode, a mechanical and hydrodynamic coupled multi-body model is established. Each lifting beam is modeled as a rigid body with X and Y degree of freedom relative to the barge. The motion compensation system is considered with a passive mode, and a spring-damper model is used to simulate its property. The coupled hydrodynamic forces of two barges are analyzed first. The eigen value analysis is conducted to identify the natural periods and eigen modes of the coupled multi-body system. A strong coupling of roll and sway motions of barge, and the heave motion of topside is observed. The sensitivity study about the parameters of lifting beams for system natural periods are carried out. The motions of barges and topside and the global dynamic loads acting on topside in regular waves are also presented. The results indicate that the heave motions decrease but the roll and pitch motions increase at their natural frequency compared with motions of the rigid connected system. The global dynamic loads acting on topside are decreased. The analyzed dynamic properties provide an initial cognition reference of the new operation system and help with the system design especially for TLS.
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Grima, Joseph N., Ruben Gatt, Pierre-Sandre Farrugaia, Andrew Alderson, and Kenneth E. Evans. "Auxetic Cellular Materials and Structures." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-82260.

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Auxetic materials and structures exhibit the very unusual property of becoming wider when stretched and narrower when squashed (i.e. they have a negative ‘Poisson’s ratio’). This property results in many beneficial effects in the characteristics of the system that make auxetics superior to conventional systems in many practical and high tech applications, including aeronautics where, for example, auxetics are being proposed as potential components for the production of better quality lifting devices such as helicopter rotor blades or airplane wings. This work reviews and discusses the behaviour of known and novel cellular systems, which exhibit this unusual but highly desirable property.
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Cimino, M., and P. R. Pagilla. "Parametrization of All Stabilizing LTI Controllers for Multirate SISO Systems." In ASME 2008 Dynamic Systems and Control Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/dscc2008-2254.

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In this work we provide a solution for the problem of parametrization of all stabilizing LTI controllers for multirate SISO systems. This problem has been previously addressed with the use of the lifting technique which can be utilized to convert a linear multirate system into a single-rate higher-order system. We propose a new procedure to solve the problem without lifting the multirate system. The new approach reduces the computational effort and restrict the solution to the set of all stabilizing LTI controllers. The non-commutative property of the down-sampling operation is the main obstacle to solve the problem. To overcome this difficulty we transform the problem by rewriting the controller transfer function using the modified Z-transform. This facilitates the separation of plant and controller dynamics in the closed-loop characteristic polynomial. Tools from the modified Z-transform method and control synthesis using the Diophantine equation are utilized to solve the problem for multirate systems. Moreover, by using the Diophantine equation the result is extended to the set of all stabilizing controllers for which the multirate system exhibits a dead-beat response.
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Xu, Min, Tao Yang, and Mingjun Wei. "Implementation of Immersed Boundary Method in WENO Scheme to Simulate Shock-Structure Interaction." In ASME 2017 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/fedsm2017-69217.

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In the present work, a sharp interface immersed boundary method using ghost-cells is implemented in a traditional 5th-order WENO scheme for shock capturing. To avoid non-physical negative density and pressure involved in high order conservative schemes, a cut-off flux limiter is introduced to enforce the positivity-preserving property, which allows to simulate the flow near vacuum and with strong discontinuities. The combined approach was first benchmarked by a steady oblique shock reflection problem with an exact solution from the oblique shock theory. Then, the algorithm was tested for singularity treatment by another classical problem of shock interaction with a forward facing step. For problems with moving boundaries, the new approach was validated against well-tested numerical solutions of a prescribed moving cylinder problem and a shock-lifting-off-cylinder problem. The agreement in all the benchmark studies shows the accuracy and capability of the current algorithm, in its simple form, to simulate the shockwave interacting with stationary obstacles or moving structures, where the structures′ motion can be either prescribed or determined by fully-coupled dynamics with surrounding flows. Finally, the approach was applied to investigate the impact of shock waves on a deformable body modeled by spring-linked plates, with different spring constants being considered.
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He, Wei-ting, Yuan-xia Zhou, and Jie Yang. "Application of Combining 3D Model and Survey on Site to Simulate Dome Lifting." In 2021 28th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/icone28-65502.

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Abstract Dome lifting is one of the most important milestones for nuclear power project. The lifting operation must be properly planned and carried out in safety manner. The simulation and analysis are usually done before lifting activities to ensure the smooth lifting implementation. By using of 3D model and survey data on site to assist dome lifting, the risks related to lifting activities can be discovered and the risk elimination scheme can be formulated at early stage. Combining with Power Plant Design Management System (PDMS), design inspection software NAVISWORKS and survey data on site, the accuracy of simulation and verification can be increased, the deviations and non-conformities can be easily found. Through the implementation of this technical scheme, it helps to ensure the smooth and safe implementation of the milestone of dome lifting for nuclear power project. This paper gives an example for combining 3D model and survey on site to simulate dome lifting, methods and suggestions are given for guidance for other projects.
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Helmi Bin, Ngadiman, Abidin Szaini Zainal, Shahudin Faizal, and Alias Nur Dalila. "Remediation of On-Bottom Stability (OBS) Issue During Offshore Installation of Light Weight Structure (LWS) at Malaysia Water." In SPE Annual Technical Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/210197-ms.

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Abstract This technical paper presents the strategy adopted by COMPANY for Remediation of On-Bottom Stability (OBS) Issue during offshore installation of Light Weight Structure (LWS) at Malaysia Water at water depth of 54m. The knowledge sharing is based on the successful remediation work in managing the OBS issue where the substructure experience excessive tilting. The LWS is designed with minimal mudmat. In addition to that, the subsea pin pile is designed to improve substructure on bottom stability issue during substructure installation. However, during actual offshore installation of substructure, the behavior of the substructure upon setting down on seabed was not as per the intended design where the substructure tilting is observed after substructure landing onto pin pile. As mitigation, the following approaches have been implemented to safeguard the substructure from toppling: Safeguard of SubstructureRisk assessment and immediate action have been taken by temporary safe holding the substructure by connecting holdback lines between substructure and installation barge bollards.Revisit OBS engineering study and analysisRevisit on bottom stability engineering study and lifting analysis considering changes to procedure/method by increasing the initial pile length (82m) to allow for early self-penetration.Revisit pile installation and sequenceThe piles have been re-fabricated onboard installation barge by utilizing the chaser rack at DB portside.The chaser rack was fabricated at site with available surplus material onboard DB. Once the revised pile fabrication completed, the piles were installed into the substructure leg for self-penetration.Result of Remediation WorkAfter successfully securing the substructure by installing the 82m pile length at one (1) leg of substructure, it has resulted that the substructure OBS has been improved to allow the COMPANY to proceed with original installation plan sequence as per installation procedure. Ultimately, COMPANY has managed to avoid catastrophic event. Despite all the challenges, the installation of LWS were completed successfully, no damage to property and most importantly with Zero Lost Time Injury (LTI).
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Wang, Jiawei, Yong-Yi Wang, William A. Bruce, Steve Rapp, and Russell Scoles. "Development of Lifting and Lowering-in Plan for the Control of Construction Stresses." In 2020 13th International Pipeline Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ipc2020-9753.

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Abstract Construction of a cross-country pipeline involves lifting the pipeline off the skids and lowering it into the trench (lifting and lowering-in). This can introduce the highest stress magnitude that the pipe may experience over its service life. If not managed properly, overly high stresses may cause integrity issues during construction and/or service. If the girth welds are qualified and accepted using alternative flaw acceptance criteria, such as those in API 1104 Annex A and CSA Z662 Annex K, these stresses must be kept below a preset level during lifting and lowering-in to satisfy the requirements of those standards. This paper covers the development and usage of a stress analysis tool for the continuous lifting and lowering-in of pipe strings without a concrete coating or river weights. The outcome of the stress analysis can be used to develop lifting and lowering-in plans for construction crews. The core functionality of the application tool is to calculate the stresses from bending in the vertical and horizontal planes. The stresses from vertical bending are derived from an extensive analysis of continuous lifting and lowering-in processes. The stresses from horizontal bending are calculated using closed-form analytical solutions. The tool provides a graphical interface that interprets the background stress analysis results and displays information necessary for the development of lifting and lowering-in plans. The tool can be used to evaluate what-if scenarios for various tentative lifting and lowering-in scenarios. The process of using the tool to develop lifting and lowering-in plans is demonstrated in this paper through an example problem. The number of sidebooms and other lifting and lowering-in parameters such as sideboom spacing and lifting height range are changed to make the lifting and lowering-in plan easy to use for the laying contractors. Such tradeoffs can be addressed proactively with construction contractors to ensure that a mutually acceptable approach to lifting and lowering-in is taken.
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Landi, Luca, Agnese Sorgenti, and Denny Clerini. "Axiomatic Design of an Adjustable Lifting System for the Assembly of Booms of Telehandlers." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71298.

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This work describes the Axiomatic Design of a lifting system to be used during the assembly of various telescopic lift booms. The main function of the lifting system is to assist the workers during both the pre-assembly of the individual parts of a boom and also during the final assembly of a wide ranges of telescopic booms of telehandlers. Prior to the design of the lifting system the fundamental phase of data collection work is described in the paper. The company production process is analysed to detect the needs and design constraints impacting directly on the design stage. The preliminary design stage included: functional, ergonomic study of the lifting system and also considerations on the safety of operators during assembly. The Axiomatic Design allows the designer to implement the Customer Needs into Functional Requirements and Design Parameters through a matrix description. So the product designer can recognize and properly transform Functional Requirements into Design Parameters during early stages of the design. In the paper the development of this new lifting system is shown through Axiomatic Design method. The resulting modular lifting system and the principal results obtained will be described in terms of: - reduction of assembly space on the “moving assembly chain” of the company, - reduction of cycle time of the assembly of the boom using the new lifting system, - improvement of ergonomic conditions of workers. During the so called decoupling phase of Axiomatic Design, the Design Parameters of the lifting system are first determined and then hierarchically ordered. So the wasted time for typical trial and error process of advanced design stage is reduced because of this clear ordering. The physical prototype of the new lifting system was already built and successfully used for the assembly on the industrial field.
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10

Williams, Dennis K. "A Proposed Design Criterion for Vessel Lifting Lugs in Lieu of ASME B30.20." In ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1280.

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This paper describes a method for evaluating the structural adequacy of various lifting lugs utilized in the erection and up righting of large pressure vessels. In addition, the analysis techniques are described in detail and design guidelines for vessel lifting are tendered. The statutory and provincial regulations in both the United States and the province of Alberta, Canada are also reviewed and discussed with respect to the too often utilized phrase “factor of safety” (FOS). The implied implications derived from the chosen FOS are also outlined. A discussion is presented as to the applicability of the ASME safety standard B30.20 [1] entitled, “Below the Hook Lifting Devices” and as to the severe shortcomings of the safety standard in its attempt to delve into the design of lifting devices, especially when applied to lifting lugs on large and heavy-weight pressure vessels. Exemplar lugs on vessels are defined and the finite element analyses and closed form Hertzian contact problem solutions are presented and interpreted in accordance with the proposed design criteria. These results are compared against the very limited design information contained within ASME B30.20 [1]. Suggestions for the revision and applicability of the Below the Hook Lifing Devices safety standard and presented and discussed in light of the examples and technical justification presented in the following paragraphs. In addition, the silence of the referenced safety standard on the very large contact stresses that are well known to exist between a lifting pin and clevis type geometry is also discussed. Due to the limited number of repetitive loading cycles that vessel lifting lugs acturally experience during the service life of a vessel, a recommendation is made to either clearly exclude vessel lifting lugs from the scope of ASME B30.20 [1] or to specifically include a separate design and analysis section within the referenced stardard to properly address the mechanical and structural design issues applicable to pressure vessel lifting lugs.
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