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Guo, Y. B., and D. A. Dornfeld. "Finite Element Modeling of Burr Formation Process in Drilling 304 Stainless Steel." Journal of Manufacturing Science and Engineering 122, no. 4 (September 1, 1999): 612–19. http://dx.doi.org/10.1115/1.1285885.
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A 3D finite element model was developed for the simulation of drilling burr formation processes of 304L stainless steel. The nonlinear thermo-elastic-plastic model simultaneously accounts for dynamic effects of mass and inertia, strain hardening, strain rate, automatic mesh contact with friction capability, material ductile failure and temperature-mechanical coupling. Material ductile failure criteria were proposed to simulate drilling burr formation. Based on a series of stress contours and the progressive deformation of the workpiece edge obtained from simulation, a drilling burr formation mechanism was proposed and divided into four stages: initiation, development, pivoting point, and formation stages with cap formation. The burr thickness is largely determined by the distance between the pre-defined machined surface and the pivoting point, while the burr height is determined by the positions of the pivoting point and the cap formation. The FEM simulation demonstrates the dominant roles of negative shearing and bending mechanisms in the drilling burr formation process. The simulation results coincide with phenomenological observations of burr geometry from drilling 304 stainless steel and plasticine work materials. [S1087-1357(00)01202-8]
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Clarysse, Bart, Christian E. Hampel, Yuliya Snihur, and Erwin Danneels. "How to Pivot: The Process of Entrepreneurial Pivoting." Academy of Management Proceedings 2018, no. 1 (August 2018): 14163. http://dx.doi.org/10.5465/ambpp.2018.14163symposium.
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Kopal, Jiří, Miroslav Rozložník, and Miroslav Tůma. "A note on adaptivity in factorized approximate inverse preconditioning." Analele Universitatii "Ovidius" Constanta - Seria Matematica 28, no. 2 (July 1, 2020): 149–59. http://dx.doi.org/10.2478/auom-2020-0024.
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AbstractThe problem of solving large-scale systems of linear algebraic equations arises in a wide range of applications. In many cases the preconditioned iterative method is a method of choice. This paper deals with the approximate inverse preconditioning AINV/SAINV based on the incomplete generalized Gram–Schmidt process. This type of the approximate inverse preconditioning has been repeatedly used for matrix diagonalization in computation of electronic structures but approximating inverses is of an interest in parallel computations in general. Our approach uses adaptive dropping of the matrix entries with the control based on the computed intermediate quantities. Strategy has been introduced as a way to solve di cult application problems and it is motivated by recent theoretical results on the loss of orthogonality in the generalized Gram– Schmidt process. Nevertheless, there are more aspects of the approach that need to be better understood. The diagonal pivoting based on a rough estimation of condition numbers of leading principal submatrices can sometimes provide inefficient preconditioners. This short study proposes another type of pivoting, namely the pivoting that exploits incremental condition estimation based on monitoring both direct and inverse factors of the approximate factorization. Such pivoting remains rather cheap and it can provide in many cases more reliable preconditioner. Numerical examples from real-world problems, small enough to enable a full analysis, are used to illustrate the potential gains of the new approach.
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Zhang, Ang, Keisuke Koyama, Weiwei Wan, and Kensuke Harada. "Manipulation Planning for Large Objects through Pivoting, Tumbling, and Regrasping." Applied Sciences 11, no. 19 (September 30, 2021): 9103. http://dx.doi.org/10.3390/app11199103.
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Robotic manipulation of a bulky object is challenging due to the limited kinematics and payload of the manipulator. In this study, a robot realizes the manipulation of general-shaped bulky objects utilizing the contact with the environment. We propose a hierarchical manipulation planner that effectively combined three manipulation styles, namely, pivoting, tumbling, and regrasping. In our proposed method, we first generate a set of superimposed planar segments on the object surface to obtain an object pose in stable contact with the table, and a set of points on the object surface for the end-effectors (EEFs) of a dual-arm manipulator to stably grasp the object. Object manipulation can be realized by solving a graph, considering the kinematic constraints of pivoting and tumbling. For pivoting, we consider two supporting styles: stable support (SP) and unstable support (USP). Our proposed method manipulates large and heavy objects by selectively using the two different support styles of pivoting and tumbling according to the conditions on the table area. In addition, it can effectively avoid the limitation arising due to the arm kinematics by regrasping the object. We experimentally demonstrate that a dual-arm manipulator can move an object from the initial to goal position within a limited area on the table, avoiding obstacles placed on the table.
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Yamazaki, Ichitaro, Stanimire Tomov, and Jack Dongarra. "Computing Low-Rank Approximation of a Dense Matrix on Multicore CPUs with a GPU and Its Application to Solving a Hierarchically Semiseparable Linear System of Equations." Scientific Programming 2015 (2015): 1–17. http://dx.doi.org/10.1155/2015/246019.
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Low-rank matrices arise in many scientific and engineering computations. Both computational and storage costs of manipulating such matrices may be reduced by taking advantages of their low-rank properties. To compute a low-rank approximation of a dense matrix, in this paper, we study the performance of QR factorization with column pivoting or with restricted pivoting on multicore CPUs with a GPU. We first propose several techniques to reduce the postprocessing time, which is required for restricted pivoting, on a modern CPU. We then examine the potential of using a GPU to accelerate the factorization process with both column and restricted pivoting. Our performance results on two eight-core Intel Sandy Bridge CPUs with one NVIDIA Kepler GPU demonstrate that using the GPU, the factorization time can be reduced by a factor of more than two. In addition, to study the performance of our implementations in practice, we integrate them into a recently developed software StruMF which algebraically exploits such low-rank structures for solving a general sparse linear system of equations. Our performance results for solving Poisson's equations demonstrate that the proposed techniques can significantly reduce the preconditioner construction time of StruMF on the CPUs, and the construction time can be further reduced by 10%–50% using the GPU.
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Lynes, Alex. "Engineering pivoting shade structures for the Dubai Expo." Structural Engineer 101, no. 1 (January 3, 2023): 32–37. http://dx.doi.org/10.56330/ptxh1818.
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This article focuses on the engineering of pivoting sunshade structures for the Dubai Expo 2020, which won a Structural Award 2022. Synopsis Most engineers will be familiar with regular-shaped, fixed buildings or structures and how to design to ensure loads can safely be transferred to the ground. But what happens when your structure is bespoke, irregular, permeable, flexible and moveable? This article outlines the unique challenges involved in developing a successful design for the shade structures at the Dubai Expo, which involved extensive wind tunnel testing, prototyping and engineering well outside the Eurocodes and usual day-to-day work of most structural engineers. The project won a Structural Award 2022 under the Process attribute that recognises technical achievement and innovation.
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Liu, Shi, and Guangchao Zhang. "Numerical Simulation and Experimental Verification of Wind Field Reconstruction Based on PCA and QR Pivoting." Applied Sciences 13, no. 5 (February 24, 2023): 2927. http://dx.doi.org/10.3390/app13052927.
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Short-term wind forecasting is critical for the dispatch, controllability and stability of a power grid. As a challenging but indispensable work, short-term wind forecasting has attracted considerable attention from researchers. In this paper, Principal Component Analysis (PCA) is applied to Computational Fluid Dynamics (CFD) calculation results for feature extraction and then combined with sparse sensing to achieve the rapid reconstruction of a three-dimensional wind speed field and pressure field. Before reconstruction, the relationship between the reconstruction error and the noise level, and a number of the basis vectors is systematically studied. In the simulation, the wind shear effect is introduced into the inlet boundary condition, and the reconstruction errors of the uniform inlet are 0.21% and 6.46%, respectively, while the maximum reconstruction errors including the wind shear effect are 1.21% and 6.41%, respectively, which verifies the feasibility of applying a PCA-based reconstruction algorithm to a 3D wind field reconstruction. In addition, to solve the time-consuming problem of most optimization algorithms based on a brute-force combinatorial search, an innovative optimization algorithm based on the QR pivoting is investigated to determine the sparse sensor placements. Simulation results show that when the number of sensors is equal to the number of basis vectors, the error of random placement is even 20 times of the optimal placement, which illustrates that QR pivoting is a powerful optimization algorithm. Finally, a wind tunnel experiment of velocity field reconstruction is performed, to verify the practicability of the optimized method based on QR pivoting, and the results indicate that a reasonably high accuracy 3D wind field can be obtained with only 10 sensors (the error of most points is less than 5% and the minimum error is only 0.74%). In general, the proposed algorithm incorporating PCA, sparse sensing and QR pivoting can quickly reconstruct the 3D velocity and pressure fields with reduced measurement costs, which is of great significance for the development of short-term wind forecasting methods.
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Mynatt, Elizabeth D., Kayci Vickers, Salimah LaForce, Sarah K. Farmer, Jeremy M. Johnson, Matthew Doiron, Aparna Ramesh, Walter Bradley Fain, Tamara Zubatiy, and Amy D. Rodriguez. "Pivoting an MCI Empowerment Program to Online Engagement." Proceedings of the ACM on Human-Computer Interaction 6, GROUP (January 14, 2022): 1–26. http://dx.doi.org/10.1145/3492851.
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In the Spring of 2020, closures and safe distancing orders swept much of the United States due to the COVID-19 pandemic. This paper presents a case study of pivoting an in-person empowerment program focused on lifestyle interventions for people newly diagnosed with Mild Cognitive Impairment (MCI) to an online program. Working as rapidly as possible to sustain participant engagement, our design decisions and subsequent iterations point to initial constraints in telehealth capabilities, as well as learning on the fly as new capabilities and requirements emerged. We present the discovery of emergent practices by family members and healthcare providers to meet the new requirements for successful online engagement. For some participants, the online program led to greater opportunities for empowerment while others were hampered by the lack of in-person program support. Providers experienced a sharp learning curve and likewise missed the benefits of in-person interaction, but also discovered new benefits of online collaboration. This work lends insights and potential new avenues for understanding how lifestyle interventions can empower people with MCI and the role of technology in that process.
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Halling, Steen, Erica Lilleleht, Kevin C. Krycka, and George Sayre. "Vital Researcher Conversations: Pivoting Past Impasses in Qualitative Research." Journal of Humanistic Psychology 60, no. 6 (July 27, 2017): 889–907. http://dx.doi.org/10.1177/0022167817722020.
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In this article, we address the vital, yet largely ignored role conversations among researchers play in furthering qualitative research projects. We identify conversations as vital when they foster creativity and afford the researchers an opportunity for clearer focus. Through a close examination of four distinctly different qualitative research experiences, we show how these conversations open and deepen reflective relationships among the researchers and with the phenomenon being studied, both of which lead to a reformulation of the research process. Finally, we suggest that these kinds of conversations emerge out of relational contexts that honor personal meaning, care, openness, and even vulnerability among researchers.
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Kwon, Hong Kyu, and Moo Kyung Jang. "3D Free Form Fabrication Using the Pivoting Side Trowel with Ceramic Material." Materials Science Forum 658 (July 2010): 268–71. http://dx.doi.org/10.4028/www.scientific.net/msf.658.268.
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This paper presents our concepts and initial investigation of a novel construction automation approach using a new layered fabrication process called Contour Crafting (CC). The process aims at automated construction of whole houses as well as sub-components. The potential of CC became evident from the initial investigations and experiments with various materials and geometries. Using this process, a single house or a colony of houses, each with possibly a different design, may be automatically constructed in a single run. CC uses computer control to take advantage of the superior surface forming capability of trowels to create large intricate structures with smooth and accurate surfaces.
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Asmagambet, D. K., G. S. Zhetesova, K. M. Beisembaev, and N. S. Malybaev. "Development of the pivoting system of the turning conveyor." BULLETIN of L.N. Gumilyov Eurasian National University. Technical Science and Technology Series 137, no. 4 (2021): 48–57. http://dx.doi.org/10.32523/2616-7263-2021-137-4-48-57.
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The application of simulation modeling methods for the design of transport systems and conveyors with the rotation of lattices in the plane of the transportation surface due to rotary and rotarytranslational hinges is carried out in the Adams dynamic programming package based on Lagrange–Euler theory and using finite element technologies. As a result, the work of the conveyors can now be carried out in 3D. Such capabilities are necessary when entering the conveyor into the chamber after the tunneling combine and for transportation along with curved workings. It is also possible to use armored turning conveyors for the extraction of DBO ores. The above expressions consider the rotation of the conveyor's lattices in any zone of its installation at a given angle up to 15о and allow determining its position in the chamber, taking into account the system of special hinges located on the sides of the lattices. The features of the movement of the combine as accelerated at short intervals of the route and the model of the turning process are substantiated.
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White, Lindsey, and Jennifer Whalley. "Pivoting to Telemedicine in a Naturopathic Undergraduate Educational Setting: Lessons Learned." CAND Journal 28, no. 2 (July 30, 2021): 11–13. http://dx.doi.org/10.54434/candj.10.
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The pandemic has driven healthcare technology forward at a record pace, prompting the rapid implementation of virtual care in Ontario, and across Canada. This case report will look at the transition of a naturopathic undergraduate teaching clinic to a virtual care delivery model, including the initial implementation using both available and new technologies, and the key learning opportunities from the transitional period. It will also review the process of continual monitoring and innovation in naturopathic clinical workflows to reduce administrative burden, promote sustainable practices in virtual care, and improve patient experiences, including decreasing barriers and increasing access to care. Lastly, we will review the importance of innovation when embracing technological change to ensure that naturopathic doctors and interns are adequately prepared for the future of virtual care.
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Heller, William A., and Michael E. Brage. "The Effects of Cheilectomy on Dorsiflexion of the First Metatarsophalangeal Joint." Foot & Ankle International 18, no. 12 (December 1997): 803–8. http://dx.doi.org/10.1177/107110079701801209.
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Our purpose in this study was to determine the effects of cheilectomy on the mechanics of dorsiflexion of the first metatarsophalangeal (MTP) joint. Ten fresh-frozen cadaver feet were utilized, of which two demonstrated radiographic evidence of hallux rigidus. Each specimen was rigidly mounted on a custom-made slide tray that was articulated with a hinge mechanism designed to dorsiflex the first MTP joint. Range-of-motion measurements were made on the first MTP joint. Cheilectomy of 30% of the metatarsal head diameter was performed. Lateral radiographs with the beam centered on the MTP joint were taken with the joint at neutral, 20°, 40°, and at the limits of dorsiflexion. This process was repeated after a 50% cheilectomy was performed. The radiographs were examined for changes in joint congruence and in patterns of surface motion as the hallux moved from neutral to full dorsiflexion. Instant centers of rotation were determined by a method first described by Rouleaux. We constructed surface velocity vectors to describe patterns of motion of the first MTP joint. The mean dorsiflexion of the first MTP joint was 67.9° and increased to 78.3° after 30% cheilectomy. The increase in dorsiflexion was significantly greater in the two specimens with hallux rigidus (33%) than in the other specimens (12.1%). After both levels of cheilectomy, the proximal phalanx demonstrated pivoting at the resection site on the metatarsal head. This pivoting resulted in abnormal motion patterns across the MTP joint. Normal sliding motion predominated in early dorsiflexion, with compression peaking at the end stage of dorsiflexion, producing jamming of the articular surfaces. Cheilectomy significantly increased dorsiflexion of the MTP joint, but resulted in abnormal motion patterns. The increase in dorsiflexion resulted from pivoting of the proximal phalanx on the metatarsal head, resulting in anomalous velocity vectors and compression across the MTP joint.
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Мягков, I. Myagkov, Львов, V. Lvov, Девисилов, Vladimir Devisilov, Шарай, and E. Sharay. "Analytical Model of Suspensions Separation in Hydrodynamic Filter with Pivoting Perforated Partition." Safety in Technosphere 3, no. 5 (October 25, 2014): 32–41. http://dx.doi.org/10.12737/6022.
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The article develops a stochastic model of suspensions separation in hydrodynamic filter. Suspensions separation in the
filter is carried out due to hydrodynamic force action on suspension flow (first stage of separation) and filtering through a
porous membrane (second stage). Pivoting perforated partition is put into filter in front of the porous filtering membrane
to increase effectiveness of suspensions separation at stage one. Complex Couette flow develops in the gap between
filter bowl and the perforated partition. Specific modes of flow in the gap produce Taylor vortex, size and intensity of
which depend on parti-tion’s rotation speed and flow velocity. It produces a flow currently known as Couette-Taylor flow.
Multidirectional Taylor vortex arising in the mainstream disrupts its hydrodynamics and creates turbulence. Given such
flow, calculation of hard phase separation with use of determinate models can be an error as does not include stochastic
processes. The article presents a new analytical model of suspensions separation, which takes in stochastic (probabilistic)
separation processes and is based on the theory of Markovian processes. Equations of diffusion type, particularly the
Fokker-Planck-Kolmogorov equation, are offered to describe process of suspensions separation in hydrodynamic filters with
pivoting perforated partition.
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Tudesco, Sarah, and Jessica Bower Relevo. "Course Reserves during the COVID 19 Pandemic: Pivoting Print to Electronic Reserves through a Data Driven Process." Journal of Interlibrary Loan, Document Delivery & Electronic Reserve 29, no. 3-5 (October 19, 2020): 105–17. http://dx.doi.org/10.1080/1072303x.2021.1934220.
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Akdim, A., A. Mahdaoui, H. Roukhe, A. Marhraoui Hseini, and A. Bouazi. "A Study and Comparison of Different 3D Reconstruction Methods Following Quality Criteria." International Journal of Advances in Soft Computing and its Applications 14, no. 3 (November 28, 2022): 125–37. http://dx.doi.org/10.15849/ijasca.221128.09.
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Abstract 3D image of a real object is a process that must be passed through two stages. The first is scanning real object by using 3D scanner, this step allows the acquisition of 3D point cloud of the object. The second is the reconstruction step, where the construction of the mesh that represents the real object is done. The surface reconstruction is carried out by means of an existing surface reconstruction method. Mesh reconstruction techniques can be grouped into two categories: the combinatorial approach and the approach by adjusting a predefined model. A large number of combinatorial methods have the principle of establishing relations between the points of a sample. The second approach is based on the idea of approximating the sampled surface using predefined models, built on global or local assumptions concerning the shape to be reconstructed. In this paper, a review of literature and experimental studies of 3d reconstruction methods, that exist in the literature, are realized then a comparison, between these methods based on Frey criterion that represents the quality of the produced surface and execution time. The experimental results show that in terms of surface quality, Ball Pivoting technique, presents a good result. However, alpha shapes method gives relevant results in execution time. Keywords: 3D reconstruction, Delaunay triangulation, Alpha Shapes, Ball Pivoting Algorithm, Poisson Method, Frey Quality, RBF, MLS
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Lu, Dong, Jian Feng Li, Yi Ming Rong, Jie Sun, Jun Zhou, and Zhong Qiu Wang. "A Study of Exit-Burr Formation Mechanism Using the Finite Element Method in Micro-Cutting of Aluminum Alloy." Key Engineering Materials 375-376 (March 2008): 470–73. http://dx.doi.org/10.4028/www.scientific.net/kem.375-376.470.
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A burr formation process in micro-cutting of Al7075-T7451 was analyzed. Three stages of burr formation including steady-state cutting stage, pivoting stage, and burr formation stage are investigated. And the effects of uncut chip thickness, cutting speed and tool edge radius on the burr formation are studied. The simulation results show that the generation of negative shear zone is one of the prime reasons for burr formation. Uncut chip thickness has a significant effect on burr height; however, the cutting speed effect is minor. Unlike in conventional cutting, in micro-cutting the effect of tool edge radius on the burr geometry can no longer be neglected.
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Delagrange, Mikel. "The Path towards Greater Efficiency and Effectiveness in the Victim Application Processes of the International Criminal Court." International Criminal Law Review 18, no. 3 (May 21, 2018): 540–62. http://dx.doi.org/10.1163/15718123-01803006.
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A unique facet of the International Criminal Court is that it allows victims to participate in the justice process and claim reparations against convicted persons. In order to effectively exercise these rights, victims must complete application forms. Over the years, in light of the sheer number of victims seeking to exercise their rights, efforts at enhancing efficiency have focused on reducing the length and breadth of victim application forms and increasing the predictability of the systems utilized by the Court to collect and assess those forms. While laudable achievements have been made, it is argued herein that the Court can further enhance efficiency and victims’ accessibility to proceedings by: committing to earlier action on victim application processes; exploiting potential synergies between victim processes; and pivoting away from paper-based applications in favour of a more digitalized, technology-driven process.
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Kenyon, Jaymes S., Daniel Keyser, Lance F. Bosart, and Michael S. Evans. "The Motion of Mesoscale Snowbands in Northeast U.S. Winter Storms." Weather and Forecasting 35, no. 1 (January 13, 2020): 83–105. http://dx.doi.org/10.1175/waf-d-19-0038.1.
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Abstract The spatial distribution of snowfall accumulation accompanying winter storms is a product of both snowfall rate and duration. Winter storms are commonly associated with mesoscale snowbands that can strongly modulate snowfall accumulation. Although the development of mesoscale snowbands can usually be anticipated, snowband residence time at a fixed location is often a forecasting challenge. However, given that snowband residence time is related to characteristics of band motion, an improved understanding of band motion presents an opportunity to improve snowfall-accumulation forecasts. This study investigates environmental features associated with specific snowband motion characteristics. Using radar reflectivity data, snowband events in the northeast United States spanning a 6-yr period are categorized according to a band-motion classification scheme, with this scheme consisting of laterally translating, hybrid, laterally quasi-stationary, and pivoting snowbands. On the basis of this classification, composite analysis is performed to identify common environmental features associated with particular band-motion categories. Results indicate that snowband motion is related to cyclone-relative band position, the confluence/diffluence and curvature of midlevel streamlines, and the distribution of horizontal temperature advection. Snowband motion is also related to hodograph shape, as well as to the across- and along-isotherm components of the Q vector. Composite results are supplemented with case studies, which suggest that laterally quasi-stationary and pivoting snowbands can favor distinct gradients in snowfall accumulation. The present study proposes that snowband motion warrants consideration during the forecasting process and, to that end, conceptual models are presented to synthesize key findings for operational application.
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Germann, Peter. "Viscosity Controls Rapid Infiltration and Drainage, Not the Macropores." Water 12, no. 2 (January 24, 2020): 337. http://dx.doi.org/10.3390/w12020337.
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The paper argues that universal approaches to infiltration and drainage in permeable media pivoting around capillarity and leading to dual porosity, non-equilibrium, or preferential flow need to be replaced by a dual process approach. One process has to account for relatively fast infiltration and drainage based on Newton’s viscous shear flow, while the other one draws from capillarity and is responsible for storage and relatively slow redistribution of soil water. Already in the second half of the 19th Century were two separate processes postulated, however, Buckingham’s and Richards’ apparent universal capillarity-based approaches to the flow and storage of water in soils dominated. The paper introduces the basics of Newton’s shear flow in permeable media. It then presents experimental applications, and explores the relationships of Newton’s shear flow with Darcy’s law, Forchheimer’s and Richards’ equations, and finally extends to the transport of solutes and particles.
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مرزوقي, أ. عمر عبد الله, and أ. م. فايزة ميلود صحراوي. "Political Culture and Civil Society in Algeria: Problematic relationship." مجلة العلوم السياسية, no. 53 (February 20, 2019): 31–49. http://dx.doi.org/10.30907/jj.v0i53.83.
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In light of what constitutes the cultural factor from a great importance in the context of the incorporation of an active and participant civil society in the process of democracy- building and the achievement of political development, this article tries to look at the concept of the political culture and the civil society with the stand on the nature of existing relationship between them in its theoretical part, then the move to dissection of the civil society crisis in Algeria under the prevalent cultural values for understanding the relationship between the two variables in its empirical part, as a step towards the detection on the pivoting of democratic values in activating the political participation and attainment the democratic consolidation phase.
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Morris, Richard D., Lili Dai, Sander De Groote, Emma Holmes, Leonard Lau, Chao Kevin Li, and Phuc Nguyen. "Coping with COVID: pivoting perspectives from teaching a third-year undergraduate financial accounting course." Accounting Research Journal 34, no. 3 (March 29, 2021): 279–89. http://dx.doi.org/10.1108/arj-09-2020-0295.
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Purpose Coronavirus (COVID-19) has caused upheaval in university teaching practices. This paper aims to document how the teaching team on a large third-year undergraduate financial accounting course in an Australian university coped with the impact of the virus. Changes in teaching practices when classes shifted from face-to-face to online instruction during the COVID-19 crisis are described and examined using the crisis management process framework of Pearson and Clair (1998). Teaching team members were asked to write brief reflections on their experiences teaching the course during the period from February to July 2020. These were then thematically analysed and included as outcomes within the Pearson and Clair (1998) framework. Design/methodology/approach Description of COVID-19 induced changes to teaching a large undergraduate financial accounting course at an Australian university. Findings Six outcomes emerged: learning new technology; collegiality; the course review; the online delivery experience; redesigning assessments and; time investment; conjectures are offered about the survival of some of the changes made during the year. Research limitations/implications The research only covers one teaching team’s experience but that is the purpose of the special issue. Practical implications Lessons for the future are explored. Social implications The implications of online teaching are explored. Originality/value The paper provides a historical record of how the teaching team on a large undergraduate financial accounting course coped with an unexpected, major event that necessitated rapid and radical changes to teaching methods.
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Gao, Jie, Weiliang Fu, Fukai Wang, Qun Zheng, Guoqiang Yue, and Ping Dong. "Experimental and numerical investigations of tip clearance flow and loss in a variable geometry turbine cascade." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 232, no. 2 (July 22, 2017): 157–69. http://dx.doi.org/10.1177/0957650917722454.
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Variable geometry turbines are widely employed to improve the off-design performance of gas turbine engines; however, there is a performance penalty associated with the vane-end partial gap required for the movement of variable vanes. This paper is a continuation of the previous work and aims to understand the leakage flow and loss mechanisms under the influence of the pivoting axis. Experimental investigations with a variable geometry turbine linear cascade have been conducted for tip gap heights of 1.1% and 2.2% blade spans as well as setting angles of −6°, 0°, and 6°, so as to reveal the three-dimensional clearance flow characteristics associated with partial gaps. Besides, numerical predictions are also carried out to better understand the experimental results. Pressure measurements were performed on the tip endwall as well as on the vane surface, and three-dimensional clearance flow fields downstream of the variable cascade were measured with a five-hole probe. The results show that as the vane setting angle is changed from design to closed, the vane loading increases and tends to be more aft-loaded, thus increasing the tip leakage loss, and vice versa. There are strong interactions between the flow around the pivoting axis and the leakage flow in the vane tip rear part, which leads to a low-pressure region on the tip endwall. The leakage vortex core is made up of the leakage flow in the vane tip rear part at both two tip gap heights, and the leakage vortex core formation process is different from the one in the rotor blade. The present results can provide useful references for the vane-end clearance design of variable geometry turbines.
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Brugnara, Andrea, Luca Fusaro, Michel Luhmer, Thierry Prangé, Benoit Colasson, and Olivia Reinaud. "An induced-fit process through mechanical pivoting of aromatic walls in host–guest chemistry of calix[6]arene aza-cryptands." Org. Biomol. Chem. 12, no. 17 (2014): 2754–60. http://dx.doi.org/10.1039/c4ob00304g.
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Mackinnon, Jonathan. "Bringing decentralised clinical trial protocols to life." Medical Writing 32, no. 1 (March 15, 2023): 12–18. http://dx.doi.org/10.56012/rtqr5570.
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Decentralised clinical trials (DCT) use technology, processes, and services to reduce or eliminate the need for onsite visits. Use of DCT components within clinical trials is becoming widespread and protocols are pivoting from using DCT components as rescue tools during the COVID-19 pandemic to including them as integrated decentralised research methods. To date, there is no consolidated guidance for what DCT component content should be included in the protocol. To enhance clarity, completeness, and replicability in clinical trial protocols incorporating DCT components, this article outlines a simple scoping process for information gathering and summarises some common considerations around frequently used components. The objective of this article is to provide protocol authors with tools, resources, and guidance to better support the development of clinical trial protocols that include DCT components.
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Lho, T. J., and S. J. Na. "A Study on Mathematical Modeling of Parameter Optimization in Gas Tungsten Arc (GTA) Welding of Thin Pipes." Journal of Engineering for Industry 117, no. 1 (February 1, 1995): 78–83. http://dx.doi.org/10.1115/1.2803282.
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In order to estimate the optimal process parameter in circumferential GTA welding of thin pipes, the objective was chosen to maintain a uniform bead width over the full circumferential joint, while the constraints consist of the capacity limit of power source and related equipments. The analytical solution of heat conduction equation with a Gaussian heat source was adopted for calculating the temperature field in circumferential welding of the pipe workpiece. The linear complementary problem (LCP) with Lemke’s pivoting algorithm and Powell’s unconstrained search method with the sequential unconstrained minimization technique (SUMT) have been applied to evaluate the optimal welding current and welding velocity for a required bead width, respectively. The experimental results of the bead formation showed that the developed mathematical model can be effectively applied for obtaining the optimal welding condition in circumferential welding of thin pipes with a small diameter.
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Homberg, Werner, Benjamin Lossen, and A. Struwe. "Friction-Spinning – an Innovative Incremental Forming Process for the Manufacturing of Functional Graded Parts." Key Engineering Materials 554-557 (June 2013): 1368–74. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.1368.
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Friction spinning is an innovative incremental forming process for the manufacture of tailor-made components with defined functionally graded properties. The process is characterized by the use of friction sub-processes for self-induced heat generation that can be employed for the defined thermo-mechanical treatment. Due to this in-process heat treatment, it is possible to extend the forming limits and achieve more complex geometries as well as favorable part properties. One very interesting application for friction spinning is the sealing of tube ends. There are a lot of conceivable application fields, including the substitution of soldering or welding operations in chemical engineering. Another interesting field is the use of this incremental forming process for industrial or automotive applications such as the manufacture of very slim cylindrical cups. An advantage of this method is the feasibility of defined control of the thickness distribution in the bottom and side wall area. This is supported by a new tool system with a pivoting forming tool. The pivot movement is controlled by a process control system. This system makes it possible to achieve different contact conditions between the tool and the workpiece during the process so as to attain a defined influence on the material flow and hence to enhance the attainable bottom wall thickness compared with previous fixed-angle tools. This tool concept thus offers an opportunity to improve the properties of the components as well as to manufacture new and complex geometries, such as hollow, fully closed roll type parts.
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Liu, Shan, Guanghong Gong, Luhao Xiao, Mengyuan Sun, and Zhengliang Zhu. "Study of rapid face modeling technology based on Kinect." International Journal of Modeling, Simulation, and Scientific Computing 09, no. 01 (January 23, 2018): 1750054. http://dx.doi.org/10.1142/s1793962317500544.
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This paper improves the algorithm of point cloud filtering and registration in 3D modeling, aiming for smaller sampling error and shorter processing time of point cloud data. Based on collaborative sampling among several Kinect devices, we analyze the deficiency of current filtering algorithm, and use a novel method of point cloud filtering. Meanwhile, we use Fast Point Feature Histogram (FPFH) algorithm for feature extraction and point cloud registration. Compared with the aligning process using Point Feature Histograms (PFH), it only takes 9[Formula: see text]min when the number of points is about 500,000, shortening the aligning time by 47.1%. To measure the accuracy of the registration, we propose an algorithm which calculates the average distance of the corresponding coincident parts of two point clouds, and we improve the accuracy to an average distance of 0.7[Formula: see text]mm. In the surface reconstruction section, we adopt Ball Pivoting algorithm for surface reconstruction, obtaining image with higher accuracy in a shorter time.
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Hashimura, M., Y. P. Chang, and David Dornfeld. "Analysis of Burr Formation Mechanism in Orthogonal Cutting." Journal of Manufacturing Science and Engineering 121, no. 1 (February 1, 1999): 1–7. http://dx.doi.org/10.1115/1.2830569.
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To prevent problems caused by burrs in machining, reduction and control of burr size is desirable. This paper presents a basic framework for and conceptual understanding of the burr formation process based upon the material properties of the workpiece. In order to verify this framework and explain the basic phenomena in the burr formation process, the deformation at the edge of the workpiece was analyzed using a finite element method (FEM). Micro-machining tests under an optical microscope and a scanning electron microscope using Al-2024-O material were also done to observe the burr formation process. The feed rate and tool edge radius were varied and the resulting burr formation observed. FEM analysis of burr formation in the 2024 material and observation of the deformation at the workpiece edge in the micro-machining tests verified the proposed conceptual understanding of the burr formation process. For the experimental conditions examined, all of the burrs in Al-2024-O were “negative” burrs, that is, edge breakout. As the feed was increased two effects were observed. One effect was an increase in the resulting burr thickness. Another effect, which was observed during the burr initiation stage while machining with a sharp tool, was an increase in both the distance and depth of the initial pivoting point of the burr from the tool edge.
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Valentim, Antão Rodrigo, Jhon Ramírez Behainne, and Aldo Braghini Junior. "Thermal Performance Analysis of Materials and Configurations for Cylindrical Sidewalls of Charcoal Kilns." Energies 15, no. 16 (August 13, 2022): 5872. http://dx.doi.org/10.3390/en15165872.
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Most of the charcoal in the world comes from small and medium-sized producers, using rudimentary carbonization kilns that require significant time or energy during the heating and cooling stages of the process. Despite advances in improving the performance, the influence of materials used in the sidewalls of these kilns has been scarcely studied. Therefore, based on numerical simulations, the present study analyses the thermal performance of cylindrical sidewalls composed of combinations of metallic materials, ceramic materials, and insulating blankets grouped in three configurations: configuration I (sidewall with just one material), configuration II (sidewall with two materials assembled in series), and configuration III (pivoting sidewall). Results were encouraging, especially when comparing kiln configuration I with the novel configuration III. Simulations suggested that the proposed configuration III could reduce the heating time by 62%, the cooling time by 91%, the heat supplied to sidewalls by 80%, and the heat loss to the external environment by 99.7%. The save of wood charged into the charcoal kiln grew up to 7.3 times, varying the thickness of the inner layer of the sidewall.
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Bradley Fain, W., Megan Nare, Matthew Doiron, Sarah Farmer, Jeremy Johnson, Salimah Laforce, Aparna Ramesh, et al. "Lessons Learned From Developing a MCI Virtual Empowerment Program?" Proceedings of the International Symposium on Human Factors and Ergonomics in Health Care 10, no. 1 (June 2021): 13–17. http://dx.doi.org/10.1177/2327857921101063.
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In the Spring of 2020, COVID-19 closures and safe distancing orders required healthcare programs across the US to cease in-person treatment. This paper presents a case study of rapidly pivoting a novel, 12-month comprehensive clinical lifestyle program combining education, occupational therapy, cognitive training, and social interaction to an online application-based education program. The focus of the program is empowerment research for people newly diagnosed with mild cognitive impairment (MCI) and their care partners, and is conducted by the Emory Brain Health Center. Georgia Tech developed an education application (named MyCEP) for use with our MCI and care partner population combining off-the-shelf services and customized user interfaces. We used an iterative design and development process, testing our application with our end users and our treatment providers, and made updates based on our discovery of the need for new capabilities and requirements. We present the discovery of emergent practices by family members and healthcare providers to meet the new requirements for successful virtual engagement.
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Ionescu, Romeo Victor, Valentin Marian Antohi, Monica Laura Zlati, Lucian Puiu Georgescu, and Catalina Iticescu. "To a Green Economy across the European Union." International Journal of Environmental Research and Public Health 19, no. 19 (September 29, 2022): 12427. http://dx.doi.org/10.3390/ijerph191912427.
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“Is the green economy a real solution to the present economic development?” represents the main question of the present research. The paper deals with assessing the impact of innovation on the green economy and quality of life through policies promoted at the European Union (EU) level. The objectives of the paper are to assess the impact level of the policy implementation across the Member States through the research and development (R&D) process and to identify models for the development of the green economy in Europe. The applied methods are empirical and analytical based on the study of literature, econometric modeling, pivoting econometric models, trend synthesis, prioritization, and staging of policy experimentation in the Member States through data processing and statistical programs. The results consist in obtaining development models for the green economy at the EU and national levels. In conclusion, the paper contributes to the early identification of vulnerabilities that may affect the development of European strategic projects in relation to events and security breaches occurring at the EU level at any given time.
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Aksenov, A. V. "Synthesis of movement control mechanism for vertical guidance of supporting-rotary device measuring antenna complex of desired dynamics." Issues of radio electronics, no. 11 (November 20, 2019): 6–10. http://dx.doi.org/10.21778/2218-5453-2019-11-6-10.
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The parametric identification of the mechanism of vertical guidance of the support-rotary device of the measuring antenna complex is carried out. The transfer function is defined, which is presented as a model of the control object. The results of experimental studies allow to determine the average speed of movement of the pivoting device on the corner of the place with the required supply voltage. An integrator and a transfer function of the controller are introduced into the algorithm of the control scheme of the object position. The developed scheme of the control system allows to provide the dynamics corresponding to this speed. The block diagram of the control system implementing the necessary dynamics of the object is given. The control algorithm with the controller is studied using the Matlab 7.9.0 software package. The article presents the logarithmic frequency characteristics of open and closed systems. According to the results of the proposed method of synthesis of the controller for the device, the time of the transient process of the installation is determined; a smooth stop of the device is provided, oscillations are eliminated.
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Theodore, John. "Absence Of Transformational Leadership In Greek Enterprises Results In The Inability Of Forming Learning Organizations." International Business & Economics Research Journal (IBER) 12, no. 6 (May 24, 2013): 701. http://dx.doi.org/10.19030/iber.v12i6.7874.
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Transactional leadersemploy transactions in which they use their legitimate reward and coercivepowers to give commands and exchange rewards for services rendered. Transformationalleadership makes subordinates aware of the importance of their jobs andperformance to the organization as well as to their own needs for personalgrowth which precipitates motivation for them to work for the good of theorganization. Learning organizations are characterized by total employeeinvolvement in a process that is collaboratively conducted and collectively accountablewithin a planned and meaningful change that is directed toward shared values orprinciples. Traditional organizations exist within stable environments, havevertical structures, and have a strategy that is formulated at the top. Additionally,they have a centralized decision-making process; tasks are rigidly defined andspecialized; the organizational culture is rigid and resistant to change; andthey have formal systems of filtered communication pivoting around the verticalhierarchy. Learning organizations cannot be formed in the Greek privatebusiness sector because the leadership of said sector is not transformational.Greece failed to develop an advanced industrial complex because of the largenumber of small enterprises in the form of proprietorships and partnershipsthat have dominated the economy.Additionally, Greek industry experienced the profound absence of thecorporate form of business that necessitates medium and large businessenterprises for the attainment of effective and efficient factors of productionand economies of scale that precipitate transformational leadership and learningorganizations.
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Suo, Zhiyong, Jingjing Ti, Hongli Xiang, Leru Zhang, Chao Xing, and Tingting Wang. "Airborne Elevation DBF-TOPS SAR/InSAR Method Based on LOS Motion Compensation and Channel Error Equalization." Remote Sensing 14, no. 18 (September 11, 2022): 4542. http://dx.doi.org/10.3390/rs14184542.
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Digital beamforming (DBF) TOPS SAR in elevation is a new synthetic aperture radar (SAR) system, which has the advantage of wide swath coverage and a high signal-to-noise ratio (SNR). In this paper, considering the phase preservation demand for interferometric SAR (InSAR) processing, the complete processing chain for DBF-TOPS SAR/InSAR in elevation is proposed with a wide beam angle and channels’ amplitude and phase errors. Firstly, we analyze the airborne motion compensation method along the line-of-sight direction for TOPS SAR with squint angle. Furthermore, for the large-range beam angle of DBF, the sub-swaths division process is presented for the range-dependent radar look angle, and the sub-swaths division criterion is also given in the analytic expression. Then, the relative amplitude and phase errors’ estimation and compensation method between channels is provided in the range frequency domain based on the pivoting filter with coherence weighting, which is convenient for DBF processing and SNR improvement. Finally, the DEMs are generated under different conditions to compare the phase preservation performance. The effectiveness of the proposed processing chain is verified with both simulated data and airborne real DBF-TOPS SAR/InSAR data.
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Lottmann, Matthias, Zachary de Rouyan, Linda Hasanovich, Steven Middleton, Michael Nicol-Seto, Connor Speer, and David Nobes. "Development of a 100-Watt-Scale Beta-Type Low Temperature Difference Stirling Engine Prototype." E3S Web of Conferences 313 (2021): 08004. http://dx.doi.org/10.1051/e3sconf/202131308004.
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This paper documents the ongoing design process of a Stirling engine prototype for a source temperature of 95 °C, aiming to achieve shaft power on the order of 100 Watts. The engine will serve to produce experimental data for the validation of a numerical low temperature Stirling model. The higher-level motivation is to assess the technical and economical potential of producing power from abundant sources of low temperature heat by using Stirling engines. Design decisions are governed by the goals of minimizing energy losses and maximizing the variability of operating points through variable heat exchanger geometry, compression ratio and charge pressure. The resulting design is a beta engine with a total gas volume around 100 liters. It features displacer and power pistons in a combined cylindrical working space and a mechanism using pivoting links similar to a bellcrank. The stroke of the power piston is adjustable while maintaining a constant top dead center position. A component critical for friction is the power piston seal, for which a low friction rolling seal and a conventional sliding seal were considered. As of June 2021, the development is at an advanced state and the first set of components are entering production.
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Ergur, Ali. "Dealing with the Machine: Strategies of Pilots and Doctors Towards Technological Integration." Bulletin of Science, Technology & Society 41, no. 4 (December 2021): 99–115. http://dx.doi.org/10.1177/02704676211065973.
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As a global and profuse fact, all professions are more or less affected by the rapid penetration of technology in their domain of practice. As the technological capacity progresses, we observe a gradual replacement of human skills by machine-guided procedures. Although such a gradual passage undeniably reduces the human presence in the practice of a profession, the transfer seems not to be a linear process. It has rather a pivoting character, comprising a series of ambivalences and contradictions. Consequently, professionals tend to keep their already acquired knowledge and ability through education and practice, and instead submissively abandon their place to technological tools. From such a perspective, we discuss in this article the strategies of resistance adopted and developed by professionals for keeping their professional power. Among a variety of professions, we choose to focus on medicine and aviation, due to their two fundamental distinctive characteristics: Both have (1) a high degree of technological determination, and (2) accomplishing vital functions. For this purpose, we discuss the strategies of resistance towards technology by professionals, throughout data we gathered from some field research conducted with doctors and pilots.
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Kumbhar, Nilesh Arjun. "Design and Development of Mechanical Ventilator." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (June 30, 2021): 4111–23. http://dx.doi.org/10.22214/ijraset.2021.35905.
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Respiratory diseases and injury-induced respiratory failure constitute a significant public healthiness in both developed and fewer developed countries. Asthma, chronic obstructive pulmonary disease and other chronic respiratory conditions are spread globally. These conditions are exacerbated by pollution , smoking, and burning of biomass for fuel, all of which are on the rise in developing countries1,2 Patients with underlying lung disease may develop respiratory failure under a selection of challenges and should be supported mechanical ventilation. These are machines which mechanically assist patients inspire and exhale, allowing the exchange of oxygen and CO2 to occur within the lungs, a process mentioned as procedure. Design and prototyping of a inexpensive portable mechanical ventilator to be utilized in mass casualty cases and resource-poor environments. The ventilator delivers breaths by compressing a typical bag-valve mask (BVM) with a pivoting cam arm, eliminating the need for an individual's operator for the BVM. Now a days, COVID-19 is one among the main issue goes on, and during this disease ventilator is plays the important role. during this project report, we've focused on to style and development of semi-automatic low cost mechanical ventilator.
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Daggett, Matthew C., Kevin A. Witte, Dimitrije Cabarkapa, Damjana V. Cabarkapa, and Andrew C. Fry. "Evidence-Based Data Models for Return-to-Play Criteria after Anterior Cruciate Ligament Reconstruction." Healthcare 10, no. 5 (May 18, 2022): 929. http://dx.doi.org/10.3390/healthcare10050929.
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The anterior cruciate ligament (ACL) tear is one of the most common knee injuries in sports that require side-to-side pivoting movements. While the timeline and specific goals during rehabilitation protocols may vary, ACL reconstruction (ACLR) is the preferred procedure necessary to return these athletes to their respective field of play. However, there are no validated guidelines that define a specific timepoint when it is safe for an athlete to return-to-play, as functional movement deficit may be present much longer than six months post ACLR. A retrospective cross-sectional analysis was conducted on 33 subjects that underwent ACLR. As a part of standard of care, each subject completed a movement screening protocol at a singular timepoint during their rehabilitation process. An innovative three-dimensional markerless motion capture system was used to obtain three algorithm-derived biometric variables: mobility, alignment, and readiness. Significant gradual improvements in mobility and readiness were observed throughout a 3–6-month post ACLR procedure period. When examining the data trends, it was obvious that not all patients responded identically to treatment plans provided by clinical professionals. Therefore, the findings of the present study suggest that the decision regarding when it is safe to return to play needs to be determined on an individual basis.
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Wardhana, Firman Kusumah, and Aria Bayu Pangestu. "Identify The Big Five Personality Traits to Escalate Business Motivation In Food Technology Industry." Malaysian Journal of Social Sciences and Humanities (MJSSH) 6, no. 8 (August 10, 2021): 532–41. http://dx.doi.org/10.47405/mjssh.v6i8.946.
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The overall purpose of this research refers to the real case in Chixar's business which points out that the instability of motivation in doing business is an aspect that has also become a concern for internal business members, given the business conditions that had experienced pivoting before and the necessity to pursue sales targets that are quite high in the business. new to pivoting, internal business has a strong desire to improve business performance but it is necessary to support it with analysis of personality traits and motivation factors for Chixar business members as the main basis. Regarding small business aspects, the implementation of human resources management is not implemented properly considering that small businesses have fewer employees so they are not a main concern to be considered in internal business, but small businesses are often focused on the orientation of sales and business operations. Therefore, the author focuses on the scope of research in the application of human resources management in small business which includes aspects of personality traits and motivating factors for doing business. Personality traits are aspects that are owned by each individual and affect individual behavior based on personal desires towards an achievement or expected goals, personality is an absolute and stable aspect and variable possessed by individuals who are associated with working behavior, motivation and goal-orientation. The author uses the Big Five Personality Traits framework to identify and analyze the types of personality traits and factors that underlie Chixar business members. Self Determination theory as the framework basis of the motivation factor is divided into two, namely intrinsic motivation and extrinsic motivation, both motivation factors are analyzed in depth on several sub-variables. Overall, the data analysis process was carried out using qualitative data methods with data collection processing stages which included individual assessment, in-depth interviews and focus group discussions. The results of data analysis show that there are differences in personality traits owned by Chixar business members and differences in extrinsic motivation factors despite the similarities that form intrinsic motivation. The results of the strongest and most implementable personality traits are Openness personality traits, the strongest intrinsic motivation factor is Relatedness factor and the strongest extrinsic motivation factor is Integrated Regulation. Regarding the findings, the author tries to recommend solution that it is necessary to implement a performance management system as the main implementation base for small businesses which includes establishing development objectives, communicating effectively, motivating employees, document performance, feedback, diagnosing performance problems and developing employees.
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Matiza, Tafadzwa, and Elmarie Slabbert. "The salient place brand factor(s) influencing medical tourism to South Africa." Tourism 68, no. 3 (2020): 336–53. http://dx.doi.org/10.37741/t.68.3.7.
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Regardless of its importance to the global tourism economy, there is still limited academic inquiry relating to Africa within the context of non-traditional tourism typologies, such as medical tourism. This article contributes to the broader understanding of the potential factors influencing medical tourism by extending place branding theory to the decision-making process of tourists within the South African medical tourism context. The present study examines the place brand - medical tourism nexus using data generated from a sample of n=233 conveniently sampled inbound tourists. Exploratory Factor and Multiple Regression Analyses were applied to the data. It emerged that South Africa's socio-cultural place brand was found to be a statistically significant heuristic cue, positively influencing medical tourism to the country, pivoting aspects such as the country's cultural practices and colonial heritage, as some of the key considerations in the decision making the process of tourists when considering South Africa as a medical tourism destination. Critically, the results associate medical tourism with the socio-cultural profile of South Africa, through the place brand as a heuristic cue for information symmetry. The study enriches both place branding and medical tourism discourse by providing empirical evidence of the nexus between the two constructs. Practically, destination marketers are provided with critical insights into tourist perspectives, and it is recommended that African governments and medical tourism facilitators collaborate to develop a nation branding theory-based framework as a decision support model for proactively managing and communicating the image of South Africa as a medical tourism destination
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Heward-Belle, Susan Lynn, Margaret Kertesz, Cathy Humphreys, Menka Tsantefski, and Jasmin Isobe. "Participatory practice guideline development at the intersections of domestic and family violence, mental distress and/or parental substance use." Advances in Dual Diagnosis 15, no. 1 (February 16, 2022): 51–65. http://dx.doi.org/10.1108/add-12-2021-0017.
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Purpose It is well established that the service system has a poor history of responding holistically to address the needs of children and families living with co-occurring complexities such as domestic violence, parental mental health and/or substance use. The purpose of this conceptual paper is to primarily describe the developmental process used to create guidelines to inform practice at the intersections of domestic violence, mental health and alcohol and other drug services, ensuring that the tactics of coercive control are visible in contexts of complexity. Design/methodology/approach The guidelines were developed through undertaking a literature review, followed by a practice-led research approach with practitioners from 33 organisations across three Australian states, Safe & Together consultants and researchers. Communities of practice composed of practitioners providing interventions to children and families were central to the approach. Data that informed the development of the guidelines included a literature review, ethnographic notes, qualitative interviews, quantitative surveys and reflections. Findings Practice-led research engaged practitioners in the development of guidelines to promote an integrated response to working with families experiencing domestic violence, substance use and mental health issues. The integrated approach drew from the Safe & Together model, emphasising partnering with women survivors, pivoting to the perpetrator, focusing on children’s safety and well-being, promoting worker safety, collaborating across agencies and influencing organisational change. The process demonstrated the usefulness of this integrated approach, using practitioner-based examples. Originality/value Successful iterative processes to develop the guidelines were undertaken to support cultural change towards holistic and collaborative work across multiple sectors and organisations.
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Certomà, Chiara, Lorenzo Chelleri, and Bruno Notteboom. "The ‘fluid governance’ of urban public spaces. Insights from informal planning practices in Rome." Urban Studies 57, no. 5 (March 7, 2019): 976–95. http://dx.doi.org/10.1177/0042098018819734.
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This paper investigates the emergence of informal planning practices and their relationship with the new geometries of power and responsibility that characterise what is here defined and described as ‘fluid governance’; and that leads to co-creative forms of public space governance. In particular, the research explores the key role played by some politically progressive forms of urban gardening in pivoting actions that transform green spaces through informal planning into areas for food production and collaborative management. This challenges traditional governance networks and re-defines the functioning of public spaces. The case of Parco delle Energie in Rome (Italy) serves as an example of a process of space re-appropriation, planning and finally co-management performed by a dense network of very diverse actors, who established a collaborative framework with the administration in order to re-shape decision-making dynamics. A comparative analysis of international cases confirms that urban gardening is challenging the dominance of a traditional planning perspective worldwide, both spatially as on the level of governance, and is turning citizens’ dissensus into a productive force in the re-imagination and stewardship of public urban space. The conclusion suggests the self-design and co-managing capacities of urban gardeners and citizens could lead to adequate synergies between actors, enabling new urban governance models in line with the global ambition to build more sustainable and inclusive cities.
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Costanzo, Marco, Giuseppe De Maria, and Ciro Natale. "Detecting and Controlling Slip through Estimation and Control of the Sliding Velocity." Applied Sciences 13, no. 2 (January 9, 2023): 921. http://dx.doi.org/10.3390/app13020921.
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Slipping detection and avoidance are key issues in dexterous robotic manipulation. The capability of robots to grasp and manipulate objects of common use can be greatly enhanced by endowing these robots with force/tactile sensors on their fingertips. Object slipping can be caused by both tangential and torsional loads when the grip force is too low. Contact force and moment measurements are required to counteract such loads and avoid slippage by controlling the grip force. In this paper, we use the SUNTouch force/tactile sensor, which provides the robotic control system with reliable measurements of both normal and tangential contact force components together with the torsional moment. By exploiting the limit surface concept and the LuGre friction model, we build a model of the object/fingertip planar sliding. This model is the basis of a nonlinear observer that estimates the sliding velocity and the friction state variable from the measured contact force and torsional moment. The slipping control system uses the estimated friction state to detect the slipping event and the estimated sliding velocity to control the grasp force. The control modality is twofold: the first one is aimed at avoiding object slip, while the second one allows the object to perform a controlled pivoting about the grasping axis. Experiments show that the robot is able to safely manipulate objects that require grasping forces in a large range, from 0.2 N to 10 N. This level of manipulation autonomy is attained by a suitably identified dynamic model that overcomes the limited generalization capability of existing learning-based approaches in the general roto-translational slip control.
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Santana, Engelbert, Davy du Plessis, and Timothy Eatman. "A Model for Engaging Students, Faculty, and Communities in Social Action through a Community-Based Curriculum and Admissions Process—A Case Study of the Honors Living-Learning Community at Rutgers University—Newark." Social Sciences 11, no. 4 (April 2, 2022): 162. http://dx.doi.org/10.3390/socsci11040162.
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The Honors Living-Learning Community (HLLC) at Rutgers University–Newark (RU-N) pushes the boundaries of academia’s possibilities by placing community-engaged scholarship as a critical pillar of student success. Established in 2015, the HLLC is pursuing its triumvirate rallying call—“revolutionizing honors, cultivating talent, and engaging communities”. The HLLC brings together dynamic students passionate about social justice issues, Rutgers University-Newark faculty and staff, and community partners aiming to tackle some of the nation’s most urgent social issues. Pivoting on a curriculum structured around what it means to be a local citizen in a global world, the HLLC brings students and faculty members from every school and college at Rutgers-Newark together with community-based partners to operationalize authentic experiential learning. With its emphasis on social action and issues of inequality, the HLLC brings together the academic sphere and community-based organizations to design and implement projects and courses that promote social justice in the community and enact ameliorative changes based on shared passions and mutual interests. Through a multimodal approach grounded in literature and best practices, the HLLC is built intentionally from the ground up on high-impact practices for student success and the principles of full participation. This paper highlights the HLLC’s efforts to engage students and community members through community-engaged courses and programs to address issues such as inequity. Furthermore, the authors offer a model that actively moves beyond theory to practice-based initiatives within an honor’s academic context. Examples of the HLLC’s initiatives are presented to enhance the discourse around collective knowledge building and community-engaged research by highlighting student and community partner-led initiatives. Given the HLLC’s resolve to develop a national model, the paper dedicates special attention to pedagogy and programs.
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Fang, Ming-Chung, and Sen-Xi Su. "Three-Dimensional Solution for the Diffraction Problem of a Submerged Body in Waves." Journal of Ship Research 42, no. 03 (September 1, 1998): 167–73. http://dx.doi.org/10.5957/jsr.1998.42.3.167.
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The paper presents a panel method to evaluate the diffraction problem on a submerged body moving beneath the free surface in regular waves. In the process of numerical calculation, the 1/r term in the potential function is treated by the method submitted by Hess & Smith (1964) with three ways for the integration, and the pulsating source terms due to the free surface effect are solved by using four different series expansions and an integral representation submitted by Telste & Noblesse (1986). With such derivation, the numerical computing techniques become available to calculate the wave exciting force for a submerged body advancing in regular waves at constant speed. Besides, the effect of the steady potential is also considered in the paper. The replacement of the double integration by a single integral in terms of a complex exponential integral is made in the derivative of the steady potential. The source strength on panels is solved efficiently by applying the Gaussian elimination method incorporated with the partial pivoting technique. Results obtained by the present technique are compared with the other methods and good agreement is found. The effect of steady flow is generally small, but it still cannot be neglected in some cases, especially for the slender body in oblique waves. It is also found that using the present technique incorporated with a suitable body mesh distribution can lead to more satisfactory results.
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Gambino, Renata, and Grazia Pulvirenti. "La neurohermenéutica de la sospecha. Una aproximación teórica." Çédille, no. 18 (2020): 389–413. http://dx.doi.org/10.25145/j.cedille.2020.18.16.
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In this paper we draw back to Ricoeur’s hermeneutics of suspicion, considered as an act of mistrustful interpretation based on intersubjectivity and aiming at disclosing la-tent and hidden meanings in the literary text. In our opinion Ricoeur’s theoretical frame is relevant for present-day neurocognitive studies about literature, with regard to the issues of embodiment, bodily simulation and interpretation of textual latent meanings hidden beyond the manifest ones. Ricoeur’s practice of suspicion is one of the two poles of our present inquiry about literary text, while the second is our neurohermeneutic approach. In the perspective of what we here define as neurohermeneutics of suspicion, the reader be-comes an interpreter, questioning the text with regard to its multilayered surface features as marking inferential clues unveiling secondary meanings. The meaning-making process depends on a creative act of the reader’s imagination embodying the mental (re)construction of the situation described by a text. Therefore, suspicious interpreting does not rely in either the text, the author, the reader or the cultural and cognitive context, but in their complex and dynamic relationship, pivoting around the common embodied faculties of being a human. We claim that particularly in the postcritical venture, Ricoeur’s hermeneutics, may be helpful in refiguring the pleasure of deciphering the fic-tional worlds of literature, challenging the reader to “play” with the literary text intended as a terra incognita of inexhaustible multiple meanings.
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Hedetoft, Ulf. "First time as a historical driver, second as fantasy: nationalism’s Second Coming and the paradoxes of populism." Punctum. International Journal of Semiotics 06, no. 02 (March 1, 2021): 101–15. http://dx.doi.org/10.18680/hss.2020.0023.
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Nationalism is a semiotic system in its own right, pivoting around complex dualisms between people and state. Its associated images cover the entire repertoire of signs, from iconicity over indexicalities to symbolism. Nationalism has brought measurable benefits to lots of people; they feel represented by their elected politicians, and they revel in symbolic abstractions of their ethnic-national identity. At least, this is how the national universe has traditionally been configured. Populism, on the other hand, nationalism’s recently assumed version, introduces a less materialistic and more fantasy-based approach to national belongingness, reversing some of the national imaginary’s ordinary paradoxes. Hence, its sign universe is almost totally dependent on symbols and their arbitrary, non-motivated connection between signifié and signifiant. This contribution aims to uncover some of the paradoxes manifested by populism and its attempts to reinvest nationalism with former glory while revealing liberalism and globalization as a historical hoax. Populism is a commitment to the idealism of the state while in the same process rejecting its reality. It clings to the formal promise of nationalism without recognizing its contradictory nature. And it refuses to accept that the uniformity of the People conceals a real struggle between groups, generations, regions, and classes in the private sphere – and the multiple challenges to their living standards and welfare that provided the origins of their populist reaction. Populism sends its supporters back to where they came from, but with a vengeance.
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Li, Kezhao, Chendong Tian, Yingxiang Jiao, and Zhe Yue. "Improved HLLL Lattice Basis Reduction Algorithm to Solve GNSS Integer Ambiguity." International Journal of Aerospace Engineering 2023 (February 15, 2023): 1–8. http://dx.doi.org/10.1155/2023/5978373.
Full textAbstract:
Recently, lattice theory has been widely used for integer ambiguity resolution in the Global Navigation Satellite System (GNSS). When using lattice theory to deal with integer ambiguity, we need to reduce the correlation between lattice bases to ensure the efficiency of the solution. Lattice reduction is divided into scale reduction and basis vector exchange. The scale reduction has no direct impact on the subsequent search efficiency, while the basis vector exchange directly impacts the search efficiency. Hence, Lenstra-Lenstra-Lovász (LLL) is applied in the ambiguity resolution to improve the efficiency. And based on Householder transformation, the HLLL improved method is also used. Moreover, to improve the calculation speed further, a Pivoting Householder LLL (PHLLL) method based on Householder orthogonal transformation and rotation sorting is proposed here. The idea of PHLLL method is as follows: First, a sort matrix is introduced into the lattice basis reduction process to sort the original matrix. Then, the sorted matrix is used for Householder transformation. After transformation, it needs to be sorted again, until the diagonal elements in the matrix meet the ascending order. In addition, when using the Householder image operator for orthogonalization, the old column norm is modified to obtain a new norm, reducing the number of column norm calculations. Compared with the LLL reduction algorithm and HLLL reduction algorithm, the experimental results show that the PHLLL algorithm has higher reduction efficiency and effectiveness. The theoretical superiority of the algorithm is proved.
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White, David G., Mary Ann O'Brien, Sylvie D. Cornacchi, Risa Freeman, and Eva Grunfeld. "COVID-19: A Qualitative Analysis of Academic Family Physician Leaders’ Crisis Response." Family Medicine 55, no. 1 (January 6, 2023): 38–44. http://dx.doi.org/10.22454/fammed.55.421082.
Full textAbstract:
Background and Objectives: The onset of the COVID-19 pandemic severely threatened all aspects of academic family medicine, constituting a crisis. Multiple publications have identified recommendations and documented the creative responses of primary care and academic organizations to address these challenges, but there is little research on how decisions came about. Our objective was to gain insight into the context, process, and nature of family medicine leaders’ discussions in pivoting to address a crisis. Methods: We used a qualitative descriptive design to explore new dimensions of existing concepts. The setting was the academic family medicine department at the University of Toronto. To identify leadership themes, we used the constant comparative method to analyze transcripts of monthly meetings of the departmental executive: three meetings immediately before and three following the declaration of a state emergency in Ontario. Results: Six themes were evident before and after the onset of the pandemic: building capacity in academic family medicine; developing leadership; advancing equity, diversity, and inclusion; learner safety and wellness; striving for excellence; and promoting a supportive and collegial environment. Five themes emerged as specific responses to the crisis: situational awareness; increased multidirectional communication; emotional awareness; innovation in education and patient care; and proactive planning for extended adaptation to the pandemic. Conclusion: Existing cultural and organizational approaches formed the foundation for the crisis response, while crisis-specific themes reflected skills and attitudes that are essential in clinical family medicine, including adapting to community needs, communication, and emotional awareness.