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Journal articles on the topic 'Pivotes'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Peyrelongue, Carlos Martner. "Puertos pivotes en México: Límites y posibilidades." Revista de la CEPAL 2002, no. 76 (2002): 123–41. http://dx.doi.org/10.18356/a11723c3-es.

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2

España Galán, Jair. "Pivotes y mecanismo de la "Masculinidad Consciente"." Perspectivas Revista de Ciencias Sociales, no. 4 (December 26, 2017): 191–211. http://dx.doi.org/10.35305/prcs.v0i4.333.

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El objetivo de este ensayo filosófico es realizar una presentación de lo que se considera “Masculinidad Consciente”, resaltando sus principales pivotes y mostrando de qué manera éstos pueden engranarse para construir un mecanismo relacional masculino fundamentado en el respeto de las diferencias psicológicas entre los individuos, y el respeto de lo humano y lo no-humano. Para lo anterior será necesario realizar, inicialmente, un análisis filosófico de la forma en que se construye la masculinidad tradicional en Occidente, para posteriormente reflexionar sobre las posibilidades que tienen los hombres de hacer aportes a la lucha por la equidad (no igualdad) de género, lucha que históricamente han encabezado las mujeres. Se mostrará que la filosofía política, social y práctica puede hacer grandes aportes a las reflexiones sobre las formas en que los hombres establecen relaciones en el mundo, y que esta misma disciplina da fundamentos a la producción de una ética de las relaciones. Se mostrará la forma en que la filosofía contemporánea francesa permite violentar la estructura atávica y universalizante de la masculinidad tradicional, y las posibles soluciones que surgen desde esta filosofía como pivotes constitutivos del mecanismo de una Masculinidad Consciente.

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3

Hoffmann, Jan. "El potencial de puertos pivotes en la costa del Pacífico sudamericano." Revista de la CEPAL 2000, no. 71 (2000): 121–43. http://dx.doi.org/10.18356/97c9ce42-es.

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4

Favela Bustillo, Tania. "Un poeta narrador." Desde el Sur 8, no. 2 (2016): 353–69. http://dx.doi.org/10.21142/des-802-2016-353-369.

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En el presente ensayo me interesa mostrar cómo es que José Watanabe2 se asume como un artesano, un poeta- narrador que va tejiendo los hilos narrativos con el espíritu poético. Para analizar la función del narrador tomé, entre otros textos, el ensayo «El narrador», de Walter Benjamin; en este, Benjamin señala que la narración es una forma artesanal de comunicación. A partir de la reflexión benjaminiana analicé el papel de la fábula y de las parábolas como pivotes de las narraciones de Watanabe, y al mismo tiempo como semillas para el poema. Las semillas que arrojan al margen de la historia que cuentan permitenel nacimiento de la poesía en los poemas; la narración, la historia, es, por decirlo así, la tierra que permite el vuelo de la poesía.

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5

Ruiz Carmona, Jacinto, and Gonzalo Ruiz López. "Modelo analítico para el análisis de la flexión y la fisuración en secciones de hormigón armado como alternativa al diagrama de pivotes." Hormigón y Acero 68, no. 282 (2017): 147–54. http://dx.doi.org/10.1016/j.hya.2017.04.007.

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6

Tierra Pérez, Luis Patricio, Sócrates Miguel Aquino Arroba, Edwin Rodolfo Pozo Safla, and Eduardo Santiago Cazar Rivera. "Modelación matemática para el diseño mecánico de una plataforma autocargable." Ciencia Digital 3, no. 3.2 (2019): 201–20. http://dx.doi.org/10.33262/cienciadigital.v3i3.2.727.

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El presente documento describe los pasos de diseño de una plataforma auto cargable, el sistema para el levantamiento de la carga es un mecanismo tipo biela manivela con corredera.  Se revisan modelos similares consultando la bibliografía y desarrollo, se analizan las condiciones de carga, se pondera y selecciona el modelo más adecuado con una matriz QFD, se relaciona el usuario con las opciones para el diseño. Los métodos emlpleados en la investigación son por observación directa cuando se analizan los modelos existentes en el mercado, exploratorio, empírico-analítico debido a que se selecciona un modelo y luego se analiza con los programas computacionales como el Matlab y SolidWorks, es una investigación propositiva porque elige una la solución efectiva del problema.; Se ha realizado los análisis por medio de cálculos analíticos y de software, llegando a considerar que la carga máxima es en los pivotes del sistema con la plataforma cargada es de 1.2464x10^5 N, 124641 Newtons = 12709.84 Kilogramo-fuerza, esto permite el diseño de los accesorios críticos. Con el análisis dinámico se concluye que cuando el cilindro hidráulico esta inclinado se necesita más fuerza para elevar la carga, el modelo planteado es funcional de fácil construcción y mantenimiento.

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7

Villegas-Salas, Irlanda. "Ruta crítica profesionalizante: una experiencia pedagógica poslicenciatura en traducción." Mutatis Mutandis. Revista Latinoamericana de Traducción 12, no. 1 (2019): 100–125. http://dx.doi.org/10.17533/udea.mut.v12n1a04.

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El presente artículo es resultado de investigación en didáctica de la traducción, deriva del proyecto Estudios de Traducción en los Procesos Educativos, y aborda ventajas formativas y riesgos profesionales de una experiencia de incursión laboral altamente exigente: la traducción de un libro sobre educación intercultural religiosa para el Consejo de Europa (Jackson, 2014). Conformaron el equipo dos licenciadas en lengua inglesa de una universidad pública del sureste de México y una traductora profesional, quien fungió como guía y gestora durante los ocho meses del proyecto. El estudio se realizó con metodología cualitativa doblemente reflexiva, basada en autoobservación etnográfica dirigida y colaborativa, consistente en tres sesiones dialógicas, dos entrevistas en profundidad y tres autorreflexiones. Esta práctica profesionalizante generó una ruta crítica para el diagnóstico y el afrontamiento de desafíos traductivos actuales que, en concordancia con el paradigma de la traducción cultural (Simon, Bhabha, Carbonell i Cortés y Spivak), concibe la traducción como proceso integral. Se comprobó que las contingencias (Spivak) didácticas son pivotes de aprendizaje significativo y resultan cruciales para contribuir a efectuar el salto de la formación (en un programa educativo curricular) a la actividad profesional. La ruta crítica generada puede orientar prácticas complementarias posformación superior no exclusiva en traducción.

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8

Riera, Constanza, and Sandra Graciela Pereira. "ENTRE EL RIESGO CLIMÁTICO Y LAS TRANSFORMACIONES PRODUCTIVAS: LA AGRICULTURA BAJO RIEGO COMO FORMA DE ADAPTACIÓN EN RÍO SEGUNDO, CÓRDOBA, ARGENTINA." Investigaciones Geográficas, no. 81 (June 20, 2013): 52. http://dx.doi.org/10.14350/rig.33718.

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En los sistemas agrarios, los riesgos asociados al clima definen la actividad productiva por estar directamente vinculada a los procesos naturales. Este trabajo se centra en uno de los aspectos considerados como central en el manejo de los riesgos climáticos en los entornos agrícolas, el de la percepción social que los actores tienen de dichos riesgos (variabilidad o eventos extremos e incluso normalidad). Esta percepción respondería en primer término a la influencia de diferentes procesos socio-históricos en los que participaron (circunstancias económicas dependientes del contexto internacional y nacional) además, de los cambios registrados en el clima en los últimos tiempos que influyeron en las condiciones físicas preexistentes. Dicha percepción se plasmó en modificaciones productivas en Río Segundo (provincia de Córdoba, Argentina), al incorporar la tecnología del riego. La principal estrategia puesta en marcha por estos productores, tomados como caso de estudio, para enfrentar el principal riesgo climático (la inestabilidad y escasez de lluvias), es la aplicación de riego complementario por pivotes centrales con agua subterránea. Los datos concretos disponibles sobre las precipitaciones no justificarían la incorporación del riego. Sin embargo, si lo hace la resignificación del riesgo de escasez de precipitaciones que han hecho estos productores “de punta”, al considerarla como algo inaceptable en la actividad agrícola moderna.

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9

Holt, Elizabeth, and Paul Drew. "Figurative Pivots: The Use of Figurative Expressions in Pivotal Topic Transitions." Research on Language & Social Interaction 38, no. 1 (2005): 35–61. http://dx.doi.org/10.1207/s15327973rlsi3801_2.

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10

Mohamed, Abdelmoneim Z., R. Troy Peters, Abid Sarwar, Behnaz Molaei, and Don McMoran. "Impact of the Intermittency Movement of Center Pivots on Irrigation Uniformity." Water 13, no. 9 (2021): 1167. http://dx.doi.org/10.3390/w13091167.

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A computer model was developed to simulate the varying depths of water applied to the ground due to the intermittent movements of a typical center pivot. The stop–go model inputs include the sprinkler application depth, the sprinkler pattern, that pattern’s wetted radius, the center pivot’s % timer setting, the move cycle time, and the end tower maximum travel speed. The model outputs were the depth of application in the pivot’s movement direction, the distribution uniformity (DU), and the coefficient of uniformity (CU). The results revealed that the pivot circular application uniformity is mostly a function of the move distance as a percent of the sprinklers’ wetted radius. This, in turn, is a function of the percent timer setting, the cycle time, and the end tower travel speed. Due to this, the high-speed center pivots had corresponding lower application uniformities compared to low-speed machines, and sprinklers with larger wetted radii resulted in better uniformity. Shortening the cycle time also resulted in higher uniformity coefficients. Based on these results, it is recommended that the run time be set based on the pivot end-tower’s travel speed and sprinkler wetted radius, such that the end tower move distance is equivalent to the sprinkler wetted radius. This will reduce wear to the tower motors due to the on–off cycling, especially for slow travel settings and for sprinklers with larger wetted radii. The ponding depths at different percent of the move distance, for the potential runoff, were estimated, which were set to be equivalent to the wetted radius.

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11

Ruiz, Guillermo, Edgar Chavez, Ubaldo Ruiz, and Eric S. Tellez. "Extreme pivots: a pivot selection strategy for faster metric search." Knowledge and Information Systems 62, no. 6 (2019): 2349–82. http://dx.doi.org/10.1007/s10115-019-01423-5.

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12

CHAMBERLIN, S. R., and D. A. SPROTT. "Linear systems of pivotals and associated pivotal likelihoods with applications." Biometrika 76, no. 4 (1989): 685–91. http://dx.doi.org/10.1093/biomet/76.4.685.

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13

Gray, Thomas R., and Jeffery A. Jenkins. "Unpacking pivotal politics: exploring the differential effects of the filibuster and veto pivots." Public Choice 172, no. 3-4 (2017): 359–76. http://dx.doi.org/10.1007/s11127-017-0450-z.

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14

Bi, Shusheng, Tao Qiao, Hongzhe Zhao, and Jingjun Yu. "STIFFNESS ANALYSIS OF TWO COMPLIANT PIVOTS USED IN SERIES ELASTIC ACTUATORS." Transactions of the Canadian Society for Mechanical Engineering 36, no. 3 (2012): 315–28. http://dx.doi.org/10.1139/tcsme-2012-0022.

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A compliant pivot used in series elastic actuators (SEAs) can be of great practical use for saving structure space. The analysis of load-deflection behavior for such pivots can provide an analytical mechanical design method. In this paper, two pivots are proposed for the corresponding implementation. Based on the Awtar accurate approximations, the two annulus compliant pivots are further simplified to linear stiffness behavior for the SEAs applications. Specifically, an annulus compliant pivot based on parallel leaf-springs is firstly analyzed. After that, we focus on a special kind of annulus compliant pivot whose degree of constraint (DOC) was released. Finally, the accuracy characteristics of the models are identified by comparing with the results obtained by nonlinear finite element analysis.

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15

Li, Liang, Weirui Ye, Mingsheng Long, Yateng Tang, Jin Xu, and Jianmin Wang. "Simultaneous Learning of Pivots and Representations for Cross-Domain Sentiment Classification." Proceedings of the AAAI Conference on Artificial Intelligence 34, no. 05 (2020): 8220–27. http://dx.doi.org/10.1609/aaai.v34i05.6336.

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Cross-domain sentiment classification aims to leverage useful knowledge from a source domain to mitigate the supervision sparsity in a target domain. A series of approaches depend on the pivot features that behave similarly for polarity prediction in both domains. However, the engineering of such pivot features remains cumbersome and prevents us from learning the disentangled and transferable representations from rich semantic and syntactic information. Towards learning the pivots and representations simultaneously, we propose a new Transferable Pivot Transformer (TPT). Our model consists of two networks: a Pivot Selector that learns to detect transferable n-gram pivots from contexts, and a Transferable Transformer that learns to generate domain-invariant representations by modeling the correlation between pivot and non-pivot words. The Pivot Selector and Transferable Transformer are jointly optimized through end-to-end back-propagation. We experiment with real tasks of cross-domain sentiment classification over 20 domain pairs where our model outperforms prior arts.

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16

Han, Xueran, Jun Chen, Jiaheng Lu, Yueguo Chen, and Xiaoyong Du. "PivotE." Proceedings of the VLDB Endowment 12, no. 12 (2019): 1966–69. http://dx.doi.org/10.14778/3352063.3352111.

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17

Hirsch, Alexander V. "Theory Driven Bias in Ideal Point Estimates—A Monte Carlo Study." Political Analysis 19, no. 1 (2011): 87–102. http://dx.doi.org/10.1093/pan/mpq028.

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This paper analyzes the use of ideal point estimates for testing pivot theories of lawmaking such as Krehbiel's (1998, Pivotal politics: A theory of U.S. lawmaking. Chicago, IL: University of Chicago) pivotal politics and Cox and McCubbins's (2005, Setting the Agenda: Responsible Party Government in the U.S. House of Representations. New York: Cambridge University Press) party cartel model. Among the prediction of pivot theories is that all pivotal legislators will vote identically on all successful legislation. Clinton (2007, Lawmaking and roll calls. Journal of Politics 69:455–67) argues that the estimated ideal points of the pivotal legislators are therefore predicted to be statistically indistinguishable and false when estimated from the set of successful final passage roll call votes, which implies that ideal point estimates cannot logically be used to test pivot theories. I show using Monte Carlo simulation that when pivot theories are augmented with probabilistic voting, Clinton's prediction only holds in small samples when voting is near perfect. I furthermore show that the predicted bias is unlikely to be consequential with U.S. Congressional voting data. My analysis suggests that the methodology of estimating ideal points to compute theoretically relevant quantities for empirical tests is not inherently flawed in the case of pivot theories.

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18

Harris, Peter, and Peter Trubowitz. "The Politics of Power Projection: The Pivot to Asia, Its Failure, and the Future of American Primacy." Chinese Journal of International Politics 14, no. 2 (2021): 187–217. http://dx.doi.org/10.1093/cjip/poab002.

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Abstract Why did the Obama administration's attempted pivot (or “rebalance”) to Asia fail? In this article, we argue that three interrelated domestic factors are to blame: hyper-partisanship in Washington, DC; the lack of a compelling foreign-policy narrative to make the pivot intelligible and attractive to a broad slice of the political class and domestic public; and the related failure to convince enough Americans that the pivot was necessary to boost their economic fortunes. These domestic stumbling blocks made it impossible for the Obama administration to invest US power assets toward a long-term programmatic endeavor in the Asia-Pacific. In making this argument about the domestic foundations of US power-projection, we improve upon existing explanations of the pivot's undoing that focus on international-level obstacles, problems with the pivot's design and implementation, or the unexpected election of Donald Trump as Obama's successor. We conclude by drawing implications for US power projection beyond the pivot and, indeed, beyond East Asia—suggesting that the US political system has become a weak foundation upon which to build any ambitious foreign-policy superstructure.

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19

Tilford, Keith. "Ontological pivots." Design Ecologies 2, no. 2 (2012): 238–62. http://dx.doi.org/10.1386/des.2.2.238_1.

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20

Ferreira, Elizabeth, Joice H. de Toledo, Antonio A. A. Dantas, and Rafael M. Pereira. "Cadastral maps of irrigated areas by center pivots in the State of Minas Gerais, using CBERS-2B/CCD satellite imaging." Engenharia Agrícola 31, no. 4 (2011): 771–80. http://dx.doi.org/10.1590/s0100-69162011000400015.

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Medium-resolution satellite images have been widely used for the identification and quantification of irrigated areas by center pivot. These areas, which present predominantly circular forms, can be easily identified by visual analyses of these images. In addition to identifying and quantifying areas irrigated by center pivot, other information that is associated to these areas is fundamental for producing cadastral maps. The goal of this work was to generate cadastral mapping of areas irrigated by center pivots in the State of Minas Gerais, Brazil, with the purpose of supplying information on irrigated agriculture. Using the satellite CBERS2B/CCD, images were used to identify and quantify irrigated areas and then associate these areas with a database containing information about: irrigated area, perimeter, municipality, path row, basin in which the pivot is located, and the date of image acquisition.3,781 center pivots systems were identified. The smallest area irrigated was 4.6 hectares and the largest one was 192.6 hectares. The total estimated value of irrigated area was 254,875 hectares. The largest number of center pivots appeared in the municipalities of Unaí and Paracatu, with 495 and 459 systems, respectively. Cadastral mapping is a very useful tool to assist and enhance information on irrigated agriculture in the State of Minas Gerais.

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21

Chew, M. "Application of Kinematically Compatible Rolling-Contact Pairs to the Design of Low-Friction Rocker-Pivots." Journal of Mechanisms, Transmissions, and Automation in Design 107, no. 3 (1985): 388–93. http://dx.doi.org/10.1115/1.3260728.

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The concept of rolling-contact has been applied to reduce friction at highly loaded rocker-pivots without the use of rolling element bearings. Various configurations for a rolling motion at the pivot are discussed. As an example, this rolling-contact concept is applied to the pivot of a valve-train rocker. Problems relating to stability and motion distortion of the rocker are addressed and solved, resulting in significant friction reduction at the pivot.

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22

RICHMAN, JESSE. "Parties, Pivots, and Policy: The Status Quo Test." American Political Science Review 105, no. 1 (2011): 151–65. http://dx.doi.org/10.1017/s0003055410000638.

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Identifying policy status quo locations is a precondition for testing key predictions of many spatial models of legislative politics, but such measures have proved to be extremely difficult to construct. This study applies a novel technique that measures policy locations in relation to legislators’ preferences. The resulting status quo estimates allow for a direct test of the policy consequences predicted by pivotal politics and party cartel theories of legislative politics. The empirical tests indicate that parties interact with pivotal politics to contribute to policy gridlock and shape policy change. By bringing pressure to bear on pivotal politics “pivots” and by blocking policy changes that would “roll” the party, parties increase the range of policies subject to gridlock in the American political system.

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23

Foxlee, Neil. "Pivots and Levers." Contributions to the History of Concepts 13, no. 1 (2018): 75–99. http://dx.doi.org/10.3167/choc.2018.130105.

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This article examines how politicians have applied evaluative-descriptive terms as rhetorical levers to a pivotal basic concept, illustrating the broader rhetorical strategy of dissociation identified by Chaim Perelman and Lucie Olbrechts-Tyteca. It focuses on political debates around capitalism that took place in late twentieth- and early twenty-first-century British politics, including the period following the financial crisis of 2008. Drawing on data from the Enhanced Hansard Corpus and Hansard Online, together with other contemporary texts, it combines quantitative and qualitative analyses using a corpus-based approach to identify salient items that are then placed in their discursive and sociopolitical contexts. More generally, the article seeks to bridge part of the gap between Koselleckian Begriff sgeschichte and Quentin Skinner’s rhetorical approach by applying what is in effect a historical-pragmatic approach to the history of political concepts.

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24

Laslier, Jean-François, and Matías Núñez. "Pivots et élections." Articles 93, no. 1-2 (2018): 79–111. http://dx.doi.org/10.7202/1044716ar.

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Cet article décrit de manière sommaire les principaux modèles de vote stratégique avec un grand nombre d’électeurs, dits modèles d’élections de masse. Dans ces modèles, on suppose que l’électeur décide de son vote en fonction des pivots, c’est-à-dire des événements où son unique voix va faire une différence quant au résultat de l’élection. Les principaux messages de ces modèles sont illustrés avec des exemples simples; ils sont ensuite présentés plus en détail; on examine enfin leurs applications et limites, notamment en ce qui concerne l’économie expérimentale.

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25

Pakula, Andrew, and Melvin Simon. "Pivots or pistons?" Nature 355, no. 6360 (1992): 496–97. http://dx.doi.org/10.1038/355496a0.

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26

Ramírez-Siqueiros, María Grethel, Oswaldo Ceballos-Gurrola, Rosa Elena Medina-Rodríguez, Marina Reyes-Robles, Fernando Bernal-Reyes, and Armando Cocca. "Factores psicosociales que contribuyen al éxito deportivo de jugadores universitarios de balonmano." Cuadernos de Psicología del Deporte 20, no. 1 (2019): 261–71. http://dx.doi.org/10.6018/cpd.356191.

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El objetivo del presente estudio fue identificar los factores de dureza mental y contexto social que contribuyen al éxito deportivo según la posición de jugadores universitarios de balonmano. Participaron 212 jugadores de equipos representativos. Para evaluar la dureza mental se aplicó el Inventario Psicológico de Ejecución Deportiva (IPED) y la contribución del contexto social se evaluó mediante el Cuestionario sobre la Percepción de los Factores Relacionados con la Excelencia en el Deporte (PFED). Los análisis mostraron que la dureza mental interpretada a través del control atencional muestra diferencias por posiciones (K = 14,21; p < 0,05), los laterales presentan puntuaciones superiores respecto a porteros, pivotes, centrales y extremos (p < 0,05). Respecto al contexto social, se obtuvieron diferencias entre posiciones de juego. Para los laterales, el factor de mayor contribución a su excelencia deportiva son sus propias habilidades (K = 11,08; p < 0,05), mientras que para porteros es la naturaleza del entrenamiento (K = 10,08; p < 0,05). Se concluye que las características psicosociales son diferentes en función de la posición de juego del jugador universitario de balonmano. El entrenador, la familia, la naturaleza y características del entrenamiento son los factores que más contribuyen al éxito deportivo y a su vez incrementan la autoconfianza del jugador. The objective of the present study was to identify the factors of mental toughness and social context that contribute to sporting success according to the position of college handball players. Participants were 212 representative teams players. To evaluate the mental toughness we applied the Psychological Inventory of Sports Performance (IPED) and the contribution of the social context was assessed using the Questionnaire on the Perception of the Related Factors with the Excellence in Sport (PFED). The analyzed showed that mental toughness interpreted through attentional control shows differences by positions (K = 14,21; p < 0,05), the sided have higher scores with respect to goalkeeper, pivots, central and back position (p < 0,05). Regarding the social context, there were differences between playing positions. For the sides, factor the greatest contribution to their sporting excellence are their own skills (K = 11,08; p < 0,05), whereas for goalkeepers is the training nature (K = 10,08; p < 0,05). It is concluded that the psychosocial characteristics are different depending on the playing position of the university handball player. The coach, family, nature and characteristics of the training are the factors that contribute most to sport success and in turn increase the self-confidence. O objetivo do presente estudo foi identificar os fatores de tenacidade mental e contexto social que contribuem para o sucesso esportivo de acordo com a posição dos jogadores de handebol universitário. Os participantes foram 212 jogadores das equipes representativas. Para avaliar a tenacidade mental foi aplicado o Inventário Psicológico do Desempenho Esportivo (IPED) e a contribuição do contexto social foi avaliada por meio do Questionário de Percepção dos Fatores Relacionados à Excelência no Esporte (PFED). Os analisados mostraram que a dureza mental interpretada pelo controle de atenção apresenta diferenças por posições (K = 14,21; p < 0,05), os lados apresentam maiores pontuações em relação ao goleiro, pivôs, posição central e traseira (p < 0,05). Em relação ao contexto social, houve diferenças entre as posições de jogo. Para os lados, a maior contribuição para sua excelência esportiva são suas próprias habilidades (K = 11,08; p < 0,05), enquanto que para os goleiros e centrais são as natureza do treinamento (K = 10,08; p < 0,05). Conclui-se que as características psicossociais são diferentes dependendo da posição de jogo do jogador de handebol da universidade. O treinador, a família, a natureza e as características do treinamento são os fatores que mais contribuem para o sucesso esportivo e, por sua vez, aumentam a autoconfiança.

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27

Silva, Franciele de Freitas, Adriana Rodolfo da Costa, Pedro Rogerio Giongo, et al. "Mapping of Central Pivot Irrigation in the Hydrographic Basin of the Goiano Tributaries of the Araguaia River." Journal of Agricultural Science 11, no. 14 (2019): 65. http://dx.doi.org/10.5539/jas.v11n14p65.

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The use of irrigation has expanded and favored agricultural productivity in recent years. The mapping through remote sensing has contributed to the monitoring of irrigated areas. In this sense, the objective of this study was to evaluate the central pivotal evolution in terms of location by municipalities, micro basins, soils and slope in the Goian tributary watershed of the Araguaia River State of Goi&aacute;s. Data were available between 2000 and 2016. Irrigated areas were surveyed through the database available in the Geographical Information System of the State of Goi&aacute;s (SGEI). The vector and raster data were manipulated using the Qgis v software. 2.18.26 (QGIS Development, 2019). The pivots were counted through the statistical function of the software. From the shape SGEI available in the soil map of classes is generated by categorizes tion of soil types. The declivity map was generated from raster files acquired through the Brazilian Geo morphological Database (INPE, 2017). The slope classes (%) were extracted with slope tool. There is an increase of more than 95% in the number of pivots and irrigated area between the years 2000 and 2016. The central pivots are more concentrated in the central region of the Red and Red-Light basins. The highest concentration of central pivots occurred in the municipality of Jussara. The pivots are located predominantly in an Oxisol area with a slope of 3 to 13%.

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SEDEÑO-NODA, A., and C. GONZÁLEZ-MARTÍN. "SHORTEST PATH SIMPLEX ALGORITHM WITH A MULTIPLE PIVOT RULE: A COMPARATIVE STUDY." Asia-Pacific Journal of Operational Research 27, no. 06 (2010): 677–91. http://dx.doi.org/10.1142/s0217595910002946.

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This paper introduces a new multiple pivot shortest path simplex method by choosing a subset of non-basic arcs to simultaneously enter into the basis. It is shown that the proposed shortest path simplex method requires O (n) multiple pivots and its running time is O (nm). Results from a computational study comparing the proposed method from previously known methods are reported. The experimental show that the proposed rule is more efficient than the considered shortest path simplex pivot rules.

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29

Luk, Franklin T., and Sanzheng Qiao. "A pivoted LLL algorithm." Linear Algebra and its Applications 434, no. 11 (2011): 2296–307. http://dx.doi.org/10.1016/j.laa.2010.04.003.

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Singhal, Amit, Chris Buckley, and Manclar Mitra. "Pivoted Document Length Normalization." ACM SIGIR Forum 51, no. 2 (2017): 176–84. http://dx.doi.org/10.1145/3130348.3130365.

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Silva, Welvis Furtado da, Henrique Fonseca Elias de Oliveira, Manoel Henrique Reis de Oliveira, et al. "Identification of Areas Irrigated by Central Pivot in the State of Goiás, Brazil." Journal of Agricultural Science 11, no. 11 (2019): 1. http://dx.doi.org/10.5539/jas.v11n11p1.

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The state of Goi&aacute;s, Brazil offers a territorial division with well-defined areas in terms of water capacity. The water found in these dividers is used in various agriculture segments. There were identified in the Hydrographic Basins in the State, areas irrigated by central pivots used in irrigated agriculture that is developing very fast and this can become a problem if a control is not done. This study aimed to collect data, identify and quantify the distribution of irrigation systems of the central pivot type licensed and operating in a spatial format in the Hydrographic Basins in the State of Goi&aacute;s. It raised digital data and physical media in order to understand how these were able to characterize the research area. It analyzed the maps, existing in the database of the State through digital (SIEG-State System of Statistics and Geographic Information of Goi&aacute;s). With the use of AutoCAD programs, version 2018, there was utilized the geographic information plataform QGIS 2.14.19 with GRASS 7.2.1 has organized thematic maps of hydrographs and pivots. This material provided the possibility of compiling the fundamental data to structure the information that supports the descriptive dynamics of the number of pivots even in separate basins. This information analyzed and compared to other publications about pivots in Goi&aacute;s contributed to the formation and elaboration of a data model for the year 2017. In the State of Goi&aacute;s, Brazil, there is a total of 3,223 central pivot type equipment in operation irrigating an area corresponding to 234,226.12 hectares.

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32

Gardner, W. W. "Tilting Pad Thrust Bearing Tests—Influence of Pivot Location." Journal of Tribology 110, no. 4 (1988): 609–13. http://dx.doi.org/10.1115/1.3261701.

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Test data are presented on the effect of circumferential pivot position on bearing temperature for two tilting pad thrust bearing designs. Pivots at 50, 60, 70, and 80 percent of the arc length were used. These tests follow earlier tests with a third design (pad support configuration), previously reported. The results indicate that pad temperatures decrease significantly as the pivot is advanced from the central (50 percent) position to at least the 70 percent position, and then tend to level, with some indications that a minimum is reached at about 75 percent.

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ILIOPOULOS, VASILEIOS, and DAVID B. PENMAN. "DUAL PIVOT QUICKSORT." Discrete Mathematics, Algorithms and Applications 04, no. 03 (2012): 1250041. http://dx.doi.org/10.1142/s1793830912500413.

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In this paper, we analyze the dual pivot Quicksort, a variant of the standard Quicksort algorithm, in which two pivots are used for the partitioning of the array. We are solving recurrences of the expected number of key comparisons and exchanges performed by the algorithm, obtaining the exact and asymptotic total average values contributing to its time complexity. Further, we compute the average number of partitioning stages and the variance of the number of key comparisons. In terms of mean values, dual pivot Quicksort does not appear to be faster than ordinary algorithm.

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Zhang, Aimei, Yanjie Gou, and Xihui Yang. "Predicting Nonlinear Stiffness, Motion Range, and Load-Bearing Capability of Leaf-Type Isosceles-Trapezoidal Flexural Pivot Using Comprehensive Elliptic Integral Solution." Mathematical Problems in Engineering 2020 (February 12, 2020): 1–11. http://dx.doi.org/10.1155/2020/1390692.

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A leaf-type isosceles-trapezoidal flexural (LITF) pivot consists of two leaf springs that are situated in the same plane and intersect at a virtual center of motion outside the pivot. The LITF pivot offers many advantages, including large rotation range and monolithic structure. Each leaf spring of a LITF pivot subject to end loads is deflected into an S-shaped configuration carrying one or two inflection points, which is quite difficult to model. The kinetostatic characteristics of the LITF pivot are precisely modeled using the comprehensive elliptic integral solution for the large-deflection problem derived in our previous work, and the strength-checking method is further presented. Two cases are employed to verify the accuracy of the model. The deflected shapes and nonlinear stiffness characteristics within the range of the yield strength are discussed. The load-bearing capability and motion range of the pivot are proposed. The nonlinear finite element results validate the effectiveness and accuracy of the proposed model for LITF pivots.

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35

Mukhopadhyay, Nitis. "A Pedagogical Note on Asymptotic Normality of a Two-Sample Approximate Pivot for Comparing Means." Calcutta Statistical Association Bulletin 73, no. 1 (2021): 45–52. http://dx.doi.org/10.1177/0008068320979483.

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A two-sample pivot for comparing the means from independent populations is well known. For large sample sizes, the distribution of the pivot is routinely approximated by a standard normal distribution. The question is about the thinking process that may guide one to rationalize invoking the asymptotic theory. In this pedagogical piece, we put forward soft statistical arguments to make users feel more at ease by suitably indexing the sample sizes from a practical standpoint that would allow a valid interpretation and understanding of pointwise convergence of the pivot's cumulative distribution function (c.d.f.) to the c.d.f. of a standard normal random variable.

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36

Gunzburger, M. D., and R. A. Nicolaides. "Elimination with Noninvertible Pivots." Linear Algebra and its Applications 64 (January 1985): 183–89. http://dx.doi.org/10.1016/0024-3795(85)90275-7.

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37

Alex Scott. "Shell pivots to chemicals." C&EN Global Enterprise 99, no. 6 (2021): 18. http://dx.doi.org/10.1021/cen-09906-buscon6.

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38

Ben-Naim, Jonathan. "Pivotal and Pivotal-discriminative Consequence Relations." Journal of Logic and Computation 15, no. 5 (2005): 679–700. http://dx.doi.org/10.1093/logcom/exi030.

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39

Reynolds, Molly E. "What If You Could Pick the Pivot? Budget Reconciliation and Pivotal Politics in the Contemporary Congress." Journal of Politics 80, no. 3 (2018): 1069–75. http://dx.doi.org/10.1086/697948.

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40

Arionfard, Hamid, and Sina Mohammadi. "Numerical Investigation of the Geometrical Effect on Flow-Induced Vibration Performance of Pivoted Bodies." Energies 14, no. 4 (2021): 1128. http://dx.doi.org/10.3390/en14041128.

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In this study, the Flow-Induced Vibration (FIV) of pivoted cylinders (at a distance) is numerically investigated as a potential source of energy harvesting. In particular, we investigate the effect of pivot point placement, arm length, and natural frequency on the FIV performance of six different cross sections in the Reynolds number of around 1000. All sections have similar mass, area, and moment of inertia to eliminate non-geometrical effects on the performance. Classical studies show that the synchronization phenomenon (lock-in) occurs when the vortex formation frequency is close enough to the body’s natural frequency. Due to the configuration of the cylinder in this research (pivoted eccentrically), the natural frequency is also a function of the flow velocity as well as the geometrical specifications of the system. The simulation is done for the arm lengths between −3D and +3D for all cross sections. Results show that maximum output power is principally influenced more by the pivot location than the arm length. Although the box cross section has a higher amplitude of vibration, the circular cross section has the highest efficiency followed by the egg shape.

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41

Martins, Juliano Dalcin, Iago Samuel Bohrz, Enrico Fleck Tura, Miguel Fredrich, Rodrigo Porto Veronez, and Greisson Alex Kunz. "LEVANTAMENTO DA ÁREA IRRIGADA POR PIVÔ CENTRAL NO ESTADO DO RIO GRANDE DO SUL." IRRIGA 21, no. 2 (2018): 300. http://dx.doi.org/10.15809/irriga.2016v21n2p300-311.

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LEVANTAMENTO DA ÁREA IRRIGADA POR PIVÔ CENTRAL NO ESTADO DO RIO GRANDE DO SUL JULIANO DALCIN MARTINS1; IAGO SAMUEL BOHRZ2; MIGUEL FREDRICH2; RODRIGO PORTO VERONEZ2; GREISSON ALEX KUNZ2;ENRICO FLECK TURA2 1Eng. Agrônomo, Prof. Doutor, Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul - Câmpus Ibirubá, IFRS–Ibirubá, Rua Nelsi Ribas Fritsch, 1111. Bairro Esperança, CEP: 98200-000, Ibirubá/RS. Fone(54) 3324-8100. E-mail: juliano.dalcin@ibiruba.ifrs.edu.br2Acadêmico do Curso de Agronomia. IFRS-Câmpus Ibirubá. E-mail: iago.bohrz@ibiruba.ifrs.edu.br, miguel.fredrich@ibiruba.ifrs.edu.br, rodrigo.veronez@ibiruba.ifrs.edu.br, greisson.kunz@ibiruba.ifrs.edu.br 1 RESUMO O objetivo deste estudo foi identificar e quantificar as áreas irrigadas por pivô central no Estado do Rio Grande do Sul, por bacias hidrográficas e por municípios. As áreas irrigadas por pivôs centrais foram levantadas através da identificação visual, com base no mosaico formado por imagens do satélite Landsat 8 OLI/TIRS, inseridos na plataforma Google Earth e na base de dados do levantamento de pivôs centrais no Brasil 2013 realizado pela (EMBRAPA/ANA). O período de mapeamento utilizado foi considerando imagens disponíveis até Março de 2015. Foram identificados 1.753 pivôs centrais, ocupando uma área irrigada de 111.122,9 hectares, e apresentando tamanho médio de 63,66 ha. Cerca de 84,04% dos pivôs concentram-se nas bacias hidrográficas do Rio Alto Jacuí (21,5%), Rio Ijuí (19,3%), Rio Piratinim (15,4%), Rios Turvo, Santa Rosa e Santo Cristo (14,4%) Rio Ibicuí (8,4%), e Rio da Várzea (5,7%). A maior concentração de pivôs centrais ocorre nos municípios de Cruz Alta (129 pivôs, 9.050,05 ha), São Miguel das Missões (76 pivôs, 5.433,5 ha), Santo Augusto (85 pivôs, 5.353,54 ha), Santa Bárbara do Sul (78 pivôs, 5.333,29 ha) e São Borja (62 pivôs, 4.560,8 ha). Palavras-chave: agricultura irrigada, bacias hidrográficas, recursos hídricos. MARTINS, J. D.; BOHRZ, I. S.; FREDRICH, M.; VERONEZ, R. P.; KUNZ, G. A.ASSESSMENT OF AREA IRRIGATED BY CENTER PIVOT IN STATE OF RIO GRANDE DO SUL 2 ABSTRACT The aim of this study was to identify and quantify the areas irrigated by center pivot in the state of Rio Grande do Sul, for watersheds and municipalities. The areas irrigated by central pivots were digitized by visual identification based on the mosaic formed by images of Landsat 8 OLI/TIRS inserted in the Google Earth platform and survey data base center pivots in Brazil in 2013 conducted by (EMBRAPA/ANA). The mapping period used considered images available until March 2015. 1,753 center pivots were identified, occupying an irrigated area of 111,122,9 ha, and with average size of 63.66 ha. Around 84.04% of the center pivots are concentrated in the basin of the High Jacuí River (21.5%), Ijuí River (19.3%), Piratinim River (15.4%), Turvo, Santa Rosa and Santo Cristo Rivers ( 14.4%) Ibicuí River (8.4%), and Várzea River (5.7%). The municipalities with the highest areas occupied by pivots occur in Cruz Alta (129 pivots, 9050.05 ha), São Miguel das Missões (76 pivots, 5433.5 ha), Santo Augusto (85 pivots, 5353.54 ha), Santa Barbara do Sul (78 pivots, 5333.29 ha) and São Borja (62 pivots, 4560.8 ha). Keywords: irrigated agriculture, watersheds, water resources

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42

Brugier, D., and M. T. Pascal. "Influence of Elastic Deformations of Turbo-Generator Tilting Pad Bearings on the Static Behavior and on the Dynamic Coefficients in Different Designs." Journal of Tribology 111, no. 2 (1989): 364–71. http://dx.doi.org/10.1115/1.3261925.

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The load on the larger tilting pad bearing can be as high as 106 N. With such high static loads, pad and pivot distortions and thermal effects in the lubricant cannot be neglected. This paper analyzes the influence of the deformation of the pads and pivots on the static and dynamic behavior of typical turbo-generator tilting pad bearings used in actual operating conditions. Thermal and pressure distortions are compared. The hydrodynamic pressures and lubricant temperatures are computed with a three-dimensional model. Thermal and elastic pad and pivot distortions are obtained with a three-dimensional finite element model.

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43

Adewuya, Ruth, and Jayzona Alberto. "PIVOT, PIVOT, PIVOT." Journal of Continuing Education in the Health Professions 41, no. 2 (2021): 89–90. http://dx.doi.org/10.1097/ceh.0000000000000361.

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44

Khan, Sadaf, Shahab A. A. Nami, and K. S. Siddiqi. "Piperazine pivoted transition metal dithiocarbamates." Journal of Molecular Structure 875, no. 1-3 (2008): 478–85. http://dx.doi.org/10.1016/j.molstruc.2007.05.020.

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45

Balibar-Mrabti, Antoinette. "Règles Formelles et Règles Rhétoriques Sur un Cas D'analyse D'adverbes." Lingvisticæ Investigationes. International Journal of Linguistics and Language Resources 11, no. 2 (1987): 303–35. http://dx.doi.org/10.1075/li.11.2.04bal.

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La discussion porte sur la caractérisation syntaxique et sémantique de quatre types de groupes nominaux adverbiaux complémentaires d'adverbes en -ment, ou adverbes généralisés. La double réduction des noms tête dans une construction verbale et dans une construction adjectivale associée les caractérise d'une part comme des noms appropriés intermédiaires entre les deux mots prédicatifs des constructions. Redoublés dans des discours de phrases simples coordonnées, ils sont caractérisés d'autre part comme des pivots lexicaux à partir desquels les adverbes généralisés sont dérivés par relativation. Les noms pivots d'adverbes peuvent être comparés aux verbes supports car les deux types de mots sont régulièrement associés dans les phrases simples à un groupe nominal prédicatif, un même nom pouvant d'ailleurs cumuler le statut de nom pivot et de nom supporté.

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46

Fama, Marco, and Alessandra Corrado. "¿"Seguridad alimentaria" y "desarrollo sostenible" como profecías de un nuevo régimen agroalimentario en la ecología-mundo?" Relaciones Internacionales, no. 47 (June 28, 2021): 67–84. http://dx.doi.org/10.15366/relacionesinternacionales2021.47.003.

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A partir de un análisis crítico de la Agenda 2030 para el Desarrollo Sostenible, este artículo se propone evidenciar los nexos que unen los discursos dominantes sobre alimentos y agricultura con las dinámicas socioecológicas que subyacen a las transformaciones y a la crisis del capitalismo contemporáneo. El supuesto inicial es que el capitalismo —en cuanto ecología-mundo— debe su supervivencia a la posibilidad de identificar continuamente nuevas y efectivas formas de combinar la explotación del trabajo asalariado con la apropiación gratuita de la naturaleza humana y extrahumana. Esto implica que la crisis en la que el capitalismo se halla hoy en día representa también la crisis de una forma específica de organizar la naturaleza. Más precisamente, es una crisis que tiene sus raíces en el “fin de la naturaleza barata”, es decir en el agotamiento de las fronteras y de las relaciones de valor que han permitido reducir periódicamente el coste del trabajo, de los alimentos, de la energía y de las materias primas. Frente a este fenómeno, las reacciones adoptadas por los principales actores de la gobernanza global han propiciado una reconfiguración general de las estrategias de acumulación vinculadas a la producción y distribución de alimentos. Como muestra el artículo, uno de los principales pivotes en torno al cual actualmente giran estas estrategias es representado por las políticas que se inspiran en los conceptos de "desarrollo sostenible" y "seguridad alimentaria", tal y como están articulados en la Agenda 2030. Nuestra tesis es que detrás de estos mismos conceptos es posible detectar una racionalidad de gobierno que pretende eludir los problemas que surgen de las contradicciones socioecológicas inherentes al capitalismo mediante el establecimiento de nuevas relaciones de valor y nuevas maneras de organizar y producir la naturaleza. Esta operación, sin embargo, exacerba la tensión entre la inclinación del capital a la mercantilización y monetización de nuevas áreas situadas al margen de la esfera productiva y su necesidad de poder seguir contando con amplias fuentes de naturaleza gratuita y trabajo no remunerado. La imposibilidad de devolver el excedente ecológico a niveles que permitan iniciar una nueva fase de expansión, por un lado, da lugar a una intensificación de los procesos de explotación impulsados por la lógica de los mercados globales y, por otro lado, hace cada vez más evidente la crisis del modelo neoliberal de desarrollo, alimentando algunas contratendencias que con la emergencia pandémica parecen destinadas a alcanzar un nivel de madurez más elevado. La primera parte del artículo reconstruye las recientes transformaciones de la economía-mundo capitalista a través de las lentes proporcionadas por el análisis de los regímenes agroalimentarios. La segunda parte se propone deconstruir las prácticas discursivas subyacentes a la Agenda 2030 y poner de relieve las ambigüedades y contradicciones inherentes a las políticas de desarrollo inspiradas en los conceptos de "desarrollo sostenible" y "seguridad alimentaria". La última parte utiliza la perspectiva de la ecología-mundo para exponer con mayor profundidad las tesis del artículo.

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47

Pigoski, T. M., and J. Duffy. "An Inverse Force Analysis of a Planar Two-Spring System." Journal of Mechanical Design 117, no. 4 (1995): 548–53. http://dx.doi.org/10.1115/1.2826717.

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A closed-form inverse force analysis was performed on a planar two-spring system. The two springs were grounded to pivots at one end and attached to a common pivot at the other. A known force was applied to the common pivot of the system, and it was required to determine all of the assembly configurations. By variable elimination, a sixth degree polynomial in the resultant length of one spring was derived, and from this, six real solutions of the point of application of force were obtained. Following this, the applied force was incremented along a line and the six paths of the moving pivot were tracked starting from the zero-load configurations. An analysis of these results showed stability phenomena indicating the workspace of this system contained regions of negative spring stiffness and points of catastrophe.

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48

Dearden, Jason, Clayton Grames, Jason Orr, Brian D. Jensen, Spencer P. Magleby, and Larry L. Howell. "Cylindrical cross-axis flexural pivots." Precision Engineering 51 (January 2018): 604–13. http://dx.doi.org/10.1016/j.precisioneng.2017.11.001.

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49

Helweg, Otto J. "Using Center Pivots for Research." Journal of Irrigation and Drainage Engineering 114, no. 2 (1988): 358–63. http://dx.doi.org/10.1061/(asce)0733-9437(1988)114:2(358).

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50

BUTLER, RONALD W. "Approximate predictive pivots and densities." Biometrika 76, no. 3 (1989): 489–501. http://dx.doi.org/10.1093/biomet/76.3.489.

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