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Journal articles on the topic 'Pushord'

Author: Grafiati

Published: 28 June 2021

Last updated: 2 February 2022

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1

Sakurai, Hiroshi. "Motion and Force Prediction of a Pushed Object by Maximum Dissipation Method." Journal of Applied Mechanics 61, no. 2 (June 1, 1994): 440–45. http://dx.doi.org/10.1115/1.2901464.

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When an object on a horizontal surface is pushed hard enough to overcome the friction between the object and the surface, the object moves. It was proved by interpreting Kuhn-Tucker’s optimality condition that when a pusher moves an object, the motion and the friction force of the pushed object corresponding to the pusher motion are those that maximize the power dissipated to friction under Coulomb’s friction law. This is different from the principles of maximum and minimum dissipation postulated in the past in that it involves the pusher motion too whereas the principles do not. It allows us to treat the prediction of the motion and the friction force of a pushed object as an optimization problem. Since this optimization can be performed with linear programming within any desired accuracy, it offers us a simple, robust, and fast method to predict the motion and the friction force of a pushed object. The method was verified with an experiment of pushing a wooden block. It was applied to the estimation of the necessary clamping force infixturing for machining.

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2

Palazzolo, A. B., R. R. Lin, R. M. Alexander, A. F. Kascak, and J. Montague. "Piezoelectric Pushers for Active Vibration Control of Rotating Machinery." Journal of Vibration and Acoustics 111, no. 3 (July 1, 1989): 298–305. http://dx.doi.org/10.1115/1.3269856.

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The active control of rotordynamic vibrations and stability by magnetic bearings and electromagnetic shakers has been discussed extensively in the literature. These devices, though effective, are usually large in volume and add significant weight to the stator. The use of piezoelectric pushers may provide similar degrees of effectiveness in light, compact packages. This paper contains analyses which extend quadratic regulator and derivative feedback control methods to the “prescribed displacement” character of piezoelectric pushers. The structrual stiffness of the pusher is also included in the theory. Tests are currently being conducted at NASA Lewis Research Center with piezoelectric pusher-based active vibration control. The paper presents results performed on the NASA test rig as preliminary verification of the related theory.

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3

Chang, Shyang-Jye, and Jing Chen. "Design and Fabrication of the Large Thrust Force Piezoelectric Actuator." Advances in Materials Science and Engineering 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/912587.

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This paper presents a novel piezoelectric actuator containing double pushers. By using finite element analysis software, this study simulated the vibration mode and amplitude of piezoelectric actuators. The Taguchi method was used to design the parameters of piezoelectric actuators including length, width, height, and electrodes setting. This paper also presents a discussion regarding the influence that the design parameters had on the actuator amplitudes. Based on optimal design parameters, a novel piezoelectric actuator containing double pushers is produced and some thrust tests are also carried out. From the experiment results, the piezoelectric actuator containing double pushers can provide a greater thrust force than that of traditional actuators containing a single pusher as the preload is greater. Comparing with the traditional actuators, the thrust force of new actuator can be increased by 48% with the double preload.

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4

Mireles-Rios, Rebeca, Victor M. Rios, and Augustina Reyes. "Pushed Out for Missing School: The Role of Social Disparities and School Truancy in Dropping Out." Education Sciences 10, no. 4 (April 15, 2020): 108. http://dx.doi.org/10.3390/educsci10040108.

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Research: The goal of this study is to understand the experiences of Black and Latino former high school students who dropped out, or were pushed out, of a large urban school district in Southern California. Specifically, this paper examines the barriers students faced that contributed to them leaving high school and their journey afterward. Thirty-nine former high school students who “dropped out”, or were pushed out of school, 61.5% males (n = 24) and 38.5% females (n = 15), were interviewed. Findings: The findings indicate the use of punitive truancy control for dealing with health and psychological needs of students, transportation issues, personnel–student relationships, and standardized testing. Examining the experiences of students who have been pushed out of school can help educators and policy makers address some of the inequities within schools. Results: We argue that pushout prevention can be developed by changing truancy and other discipline policies in schools. Implications from this study help us understand how we can better support students before they are pushed out.

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5

Barnett, Richard. "Drug pushers?" Lancet 367, no. 9522 (May 2006): 1568. http://dx.doi.org/10.1016/s0140-6736(06)68679-0.

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6

Lieberman, Sharon, and Lawrence Lader. "Pill Pusher." Women's Review of Books 8, no. 9 (June 1991): 21. http://dx.doi.org/10.2307/4021032.

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7

Lawson, Ron. "Pedal Pusher." Brain & Life 15, no. 5 (2019): 6. http://dx.doi.org/10.1097/01.nnn.0000602588.11308.bd.

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8

Hennig, Don. "Pedal Pusher." Brain & Life 15, no. 5 (2019): 6. http://dx.doi.org/10.1097/01.nnn.0000602592.18932.62.

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9

Fischetti, Mark. "Pushed Out." Scientific American 315, no. 4 (September 20, 2016): 88. http://dx.doi.org/10.1038/scientificamerican1016-88.

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10

Matteo, Paci. "Pusher Syndrome." Physical Therapy 84, no. 6 (June 1, 2004): 580–83. http://dx.doi.org/10.1093/ptj/84.6.580.

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11

Yu-Sheng Lin and C. B. Shung. "Quasi-pushout cell discarding." IEEE Communications Letters 1, no. 5 (September 1997): 146–48. http://dx.doi.org/10.1109/4234.625041.

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12

Marks, Naomi. "Front page pill pushers." BMJ 331, no. 7513 (August 11, 2005): 410.1. http://dx.doi.org/10.1136/bmj.331.7513.410.

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13

Willett, W. "NUTRITION: The Food Pushers." Science 297, no. 5579 (July 12, 2002): 198–99. http://dx.doi.org/10.1126/science.1074485.

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14

&NA;. "Physicians as Drug Pushers." Back Letter 27, no. 6 (June 2012): 66–67. http://dx.doi.org/10.1097/01.back.0000415406.20422.62.

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15

Forest, M. Gregory, Panon Phuworawong, Qi Wang, and Ruhai Zhou. "Rheological signatures in limit cycle behaviour of dilute, active, polar liquid crystalline polymers in steady shear." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 372, no. 2029 (November 28, 2014): 20130362. http://dx.doi.org/10.1098/rsta.2013.0362.

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We consider the dilute regime of active suspensions of liquid crystalline polymers (LCPs), addressing issues motivated by our kinetic model and simulations in Forest et al. (Forest et al. 2013 Soft Matter 9 , 5207–5222 ( doi:10.1039/c3sm27736d )). In particular, we report unsteady two-dimensional heterogeneous flow-orientation attractors for pusher nanorod swimmers at dilute concentrations where passive LCP equilibria are isotropic. These numerical limit cycles are analogous to longwave (homogeneous) tumbling and kayaking limit cycles and two-dimensional heterogeneous unsteady attractors of passive LCPs in weak imposed shear, yet these states arise exclusively at semi-dilute concentrations where stable equilibria are nematic. The results in Forest et al. mentioned above compel two studies in the dilute regime that complement recent work of Saintillan & Shelley (Saintillan & Shelley 2013 C. R. Physique 14 , 497–517 ( doi:10.1016/j.crhy.2013.04.001 )): linearized stability analysis of the isotropic state for nanorod pushers and pullers; and an analytical–numerical study of weakly and strongly sheared active polar nanorod suspensions to capture how particle-scale activation affects shear rheology. We find that weakly sheared dilute puller versus pusher suspensions exhibit steady versus unsteady responses, shear thickening versus thinning and positive versus negative first normal stress differences. These results further establish how sheared dilute nanorod pusher suspensions exhibit many of the characteristic features of sheared semi-dilute passive nanorod suspensions.

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16

Meese, Tessa. "Dentistry pushed aside." Dental Nursing 7, no. 5 (May 2011): 245. http://dx.doi.org/10.12968/denn.2011.7.5.245.

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17

Santos Pontelli, Taiza EG. "Síndrome de Pusher." Revista Neurociências 19, no. 4 (March 31, 2001): 583–84. http://dx.doi.org/10.34024/rnc.2011.v19.8320.

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18

Fayet, B., E. Racy, and G. Renard. "Pushed monocanalicular intubation." Journal Français d'Ophtalmologie 33, no. 3 (March 2010): 145–51. http://dx.doi.org/10.1016/j.jfo.2010.01.013.

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19

Kaiser, J. "Basic Microbiology Pushed." Science 308, no. 5718 (April 1, 2005): 35b. http://dx.doi.org/10.1126/science.308.5718.35b.

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20

Larkin, Marilynn. "Pill pusher recants." Lancet 367, no. 9512 (March 2006): 722. http://dx.doi.org/10.1016/s0140-6736(06)68288-3.

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21

Porter, Matthew C., and Michael A. Diefenbach. "Pushed and Pulled." Journal of Health Psychology 14, no. 2 (March 2009): 288–96. http://dx.doi.org/10.1177/1359105308100213.

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22

Noordegraaf, Mirko, Pauline Meurs, and Annemiek Montijn-Stoopendaal. "Pushed organizational pulls." Public Management Review 7, no. 1 (March 2005): 25–43. http://dx.doi.org/10.1080/1471903042000339400.

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23

Roller, Margaret L. "The ‘Pusher Syndrome’." Journal of Neurologic Physical Therapy 28, no. 1 (March 2004): 29. http://dx.doi.org/10.1097/01.npt.0000284775.32802.c0.

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24

Orrit, Michel. "Photons pushed together." Nature 460, no. 7251 (July 2009): 42–44. http://dx.doi.org/10.1038/460042a.

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25

Henderson, J. B., W. D. Emmerich, and E. Wassmer. "A method for the temperature calibration of pushrod dilatometers." Journal of Thermal Analysis 32, no. 6 (November 1987): 1905–13. http://dx.doi.org/10.1007/bf01913983.

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26

De Bortoli, Patrícia, Silvia Alves Souza, Carolina Zamariola Margossian, Paulo Roberto Garcia Lucareli, José Eduardo Pompeu, and Sandra Maria Alvarenga Anti Pompeu. "Aspectos fisioterapêuticos e prognósticos da Síndrome de Pusher." O Mundo da Saúde 32, no. 2 (June 4, 2008): 215–20. http://dx.doi.org/10.15343/0104-7809.200832.2.12.

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27

Cheng, C. Y., D. J. Lewandowski, and J. W. David. "Determination of Allowable Pushrod Angle Using a Three-Dimensional Valve Train Model." Journal of Dynamic Systems, Measurement, and Control 123, no. 3 (January 30, 1998): 408–12. http://dx.doi.org/10.1115/1.1388297.

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Pushrod-type valve trains are still found in many engines. Since a vertical pushrod causes interference with the intake port, which reduces engine power, the pushrod is sometimes tilted to increase the available cross-sectional area of the intake port. In order to analyze this mechanism, a three-dimensional valve train model was developed. The model is then verified through experimention. Simulation and experimental results agree that valve train dynamic performance is not significantly affected by pushrod angles less than 20 degrees.

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28

Hager, Anthony W., and Jorge Martinez. "Pushout-invariant extensions and monoreflections." Journal of Pure and Applied Algebra 129, no. 3 (August 1998): 263–95. http://dx.doi.org/10.1016/s0022-4049(97)00067-4.

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29

HABEL, ANNEGRET, JÜRGEN MÜLLER, and DETLEF PLUMP. "Double-pushout graph transformation revisited." Mathematical Structures in Computer Science 11, no. 5 (September 25, 2001): 637–88. http://dx.doi.org/10.1017/s0960129501003425.

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In this paper we investigate and compare four variants of the double-pushout approach to graph transformation. As well as the traditional approach with arbitrary matching and injective right-hand morphisms, we consider three variations by employing injective matching and/or arbitrary right-hand morphisms in rules. We show that injective matching provides additional expressiveness in two respects: for generating graph languages by grammars without non-terminals and for computing graph functions by convergent graph transformation systems. Then we clarify for each of the three variations whether the well-known commutativity, parallelism and concurrency theorems are still valid and – where this is not the case – give modified results. In particular, for the most general approach with injective matching and arbitrary right-hand morphisms, we establish sequential and parallel commutativity by appropriately strengthening sequential and parallel independence.

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30

Kassirer, Jerome P., and John T. Harrington. "Fending off the Potassium Pushers." New England Journal of Medicine 312, no. 12 (March 21, 1985): 785–87. http://dx.doi.org/10.1056/nejm198503213121210.

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31

ALP, MURAT, and BIJAN DAVVAZ. "Pullback and pushout crossed polymodules." Proceedings - Mathematical Sciences 125, no. 1 (February 2015): 11–20. http://dx.doi.org/10.1007/s12044-015-0212-0.

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32

Brookes, Michael, Timothy Hinks, Geoffrey Wood, Pauline Dibben, and Ian Roper. "“Pulled Apart, Pushed Together”." Articles 59, no. 4 (September 19, 2005): 769–92. http://dx.doi.org/10.7202/011338ar.

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This is a study of horizontal and vertical solidarity within a national labour movement, based on a nationwide survey of members of affiliated unions of the Congress of South African Trade Unions. On the one hand, the survey reveals relatively high levels of vertical and horizontal solidarity, despite the persistence of some cleavages on gender and racial lines. On the other hand, the maintenance and deepening of existing horizontal and vertical linkages in a rapidly changing socio-economic context, represents one of many challenges facing organized labour in an industrializing economy. COSATU’s strength is contingent not only on an effective organizational capacity, and a supportive network linking key actors and interest groupings, but also on the ability to meet the concerns of existing constituencies and those assigned to highly marginalized categories of labour.

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33

McDonald, Peter, and Tom Paulin. "Jump or Get Pushed." Irish Review (1986-), no. 4 (1988): 92. http://dx.doi.org/10.2307/29735351.

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34

Agarwal, D. K., D. D. Gaur, and M. Agarwal. "Agarwal-Gaur knot pusher." Minimally Invasive Therapy 2, no. 6 (January 1993): 339–40. http://dx.doi.org/10.3109/13645709309152983.

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35

Paci, Matteo, and Lucio A. Rinaldi. "Physiotherapy for pusher behaviour." NeuroRehabilitation 20, no. 4 (December 26, 2005): 347. http://dx.doi.org/10.3233/nre-2005-20410.

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36

Cheng, B., T. J. T. Kwan, Y. M. Wang, S. A. Yi, S. H. Batha, and F. Wysocki. "Ignition and pusher adiabat." Plasma Physics and Controlled Fusion 60, no. 7 (June 8, 2018): 074011. http://dx.doi.org/10.1088/1361-6587/aac611.

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37

Papazian, Nazareth J., Fadl Chahine, Bishara Atiyeh, Samer Deeba, Elias Zgheib, and Ghassan Abu-Sittah. "Introduction of “Papazian Pusher." Journal of Craniofacial Surgery 26, no. 6 (September 2015): 1975–76. http://dx.doi.org/10.1097/scs.0000000000001926.

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38

Wright, Alison. "Pushed to the limit." Nature Physics 3, no. 1 (January 2007): 19. http://dx.doi.org/10.1038/nphys500.

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39

Wells, William A. "Cohesin gets pushed around." Journal of Cell Biology 166, no. 2 (July 12, 2004): 154. http://dx.doi.org/10.1083/jcb1662rr1.

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40

Libois, Pierre-Yves, Denis Zanchetta, Adrien De Beer, Maud Ghislain, and Antoine Libois. "« Pusher syndrome » d’étiologie inhabituelle." Neurophysiologie Clinique 47, no. 5-6 (December 2017): 340–41. http://dx.doi.org/10.1016/j.neucli.2017.10.011.

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41

Thompson, Carolyn J., and Eric L. Dey. "Pushed to the Margins." Journal of Higher Education 69, no. 3 (May 1998): 324–45. http://dx.doi.org/10.1080/00221546.1998.11775137.

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42

Arts, J., V. J. Louw, and C. T. Bolliger. "Pushed, Pulled or Twisted?" Respiration 68, no. 4 (2001): 405. http://dx.doi.org/10.1159/000050535.

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43

KERR, R. A. "Forecasting Pushed Too Far." Science 244, no. 4909 (June 9, 1989): 1139. http://dx.doi.org/10.1126/science.244.4909.1139.

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44

Dalby, Bruce. "Pendulum Pushed Too Far." Music Educators Journal 84, no. 4 (January 1998): 42–45. http://dx.doi.org/10.1177/002743219808400401.

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45

Dalton, Rex. "Hobbit origins pushed back." Nature 464, no. 7287 (March 2010): 335. http://dx.doi.org/10.1038/464335a.

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46

Chisholm, Nicholas G., Dominique Legendre, Eric Lauga, and Aditya S. Khair. "A squirmer across Reynolds numbers." Journal of Fluid Mechanics 796 (April 29, 2016): 233–56. http://dx.doi.org/10.1017/jfm.2016.239.

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The self-propulsion of a spherical squirmer – a model swimming organism that achieves locomotion via steady tangential movement of its surface – is quantified across the transition from viscously to inertially dominated flow. Specifically, the flow around a squirmer is computed for Reynolds numbers ($Re$) between 0.01 and 1000 by numerical solution of the Navier–Stokes equations. A squirmer with a fixed swimming stroke and fixed swimming direction is considered. We find that fluid inertia leads to profound differences in the locomotion of pusher (propelled from the rear) versus puller (propelled from the front) squirmers. Specifically, pushers have a swimming speed that increases monotonically with $Re$, and efficient convection of vorticity past their surface leads to steady axisymmetric flow that remains stable up to at least $Re=1000$. In contrast, pullers have a swimming speed that is non-monotonic with $Re$. Moreover, they trap vorticity within their wake, which leads to flow instabilities that cause a decrease in the time-averaged swimming speed at large $Re$. The power expenditure and swimming efficiency are also computed. We show that pushers are more efficient at large $Re$, mainly because the flow around them can remain stable to much greater $Re$ than is the case for pullers. Interestingly, if unstable axisymmetric flows at large $Re$ are considered, pullers are more efficient due to the development of a Hill’s vortex-like wake structure.

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47

BURMEISTER, PETER, MERCÈ LLABRÉS, and FRANCESC ROSSELLÓ. "Pushout complements for partly total algebras." Mathematical Structures in Computer Science 12, no. 2 (April 2002): 177–201. http://dx.doi.org/10.1017/s0960129501003541.

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Let Σ be an arbitrary signature and ϒ be a non-empty set of operation symbols within it. A (partial) Σ-algebra is ϒ-total when all its operations in ϒ are total: these are the partly total algebras in the title, and they include total algebras and attributed graphs. In this paper we establish a necessary and sufficient condition on a pair of homomorphisms of ϒ-total Σ-algebras for the existence of a pushout complement of them. This solves the application problem for the double-pushout transformation of these kinds of structure.

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48

The Lancet. "Peddling drugs to the pedal pushers." Lancet 352, no. 9126 (August 1998): 415. http://dx.doi.org/10.1016/s0140-6736(98)21032-4.

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49

ALBERICH, RICARDO, MERCÈ LLABRÉS, and FRANCESC ROSSELLÓ. "SINGLE-PUSHOUT TRANSFORMATION OF TOTAL ALGEBRAS." International Journal of Foundations of Computer Science 15, no. 01 (February 2004): 205–22. http://dx.doi.org/10.1142/s0129054104002388.

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We characterize the pairs of partial homomorphisms of total Σ-algebras that have a pushout in the corresponding category, for an arbitrary signature Σ. This characterization provides the application condition for the single-pushout approach to the transformation of total algebras.

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50

Mishra, S. M. "Mountebank pill pushers & cosmetic marketeers." Journal of Nepalgunj Medical College 14, no. 1 (June 13, 2017): 1. http://dx.doi.org/10.3126/jngmc.v14i1.17482.

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