Готові списки джерел за темами / Pivoter

Добірка наукової літератури з теми "Pivoter"

Автор: Grafiati
Опубліковано: 15 червня 2023

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Зміст

  1. Статті в журналах
  2. Дисертації
  3. Книги
  4. Частини книг
  5. Тези доповідей конференцій
  6. Звіти організацій

Статті в журналах з теми "Pivoter":

1

Barth-Weingarten, Dagmar, Uwe-A. Küttner, and Chase Wesley Raymond. "Pivots revisited: Cesuring in action." Open Linguistics 7, no. 1 (January 1, 2021): 613–37. http://dx.doi.org/10.1515/opli-2020-0152.

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Abstract The term “pivot” usually refers to two overlapping syntactic units such that the completion of the first unit simultaneously launches the second. In addition, pivots are generally said to be characterized by the smooth prosodic integration of their syntactic parts. This prosodic integration is typically achieved by prosodic-phonetic matching of the pivot components. As research on such turns in a range of languages has illustrated, speakers routinely deploy pivots so as to be able to continue past a point of possible turn completion, in the service of implementing some additional or revised action. This article seeks to build on, and complement, earlier research by exploring two issues in more detail as follows: (1) what exactly do pivotal turn extensions accomplish on the action dimension, and (2) what role does prosodic-phonetic packaging play in this? We will show that pivot constructions not only exhibit various degrees of prosodic-phonetic (non-)integration, i.e., differently strong cesuras, but that they can be ordered on a continuum, and that this cline maps onto the relationship of the actions accomplished by the components of the pivot construction. While tighter prosodic-phonetic integration, i.e., weak(er) cesuring, co-occurs with post-pivot actions whose relationship to that of the pre-pivot tends to be rather retrospective in character, looser prosodic-phonetic integration, i.e., strong(er) cesuring, is associated with a more prospective orientation of the post-pivot’s action. These observations also raise more general questions with regard to the analysis of action.
2

Alonso, Santiago. "Comprender: propuesta de pivotes." Educación 20, no. 38 (June 1, 2011): 7–21. http://dx.doi.org/10.18800/educacion.201101.001.

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La pregunta básica es qué se necesita para comprender. La propuesta es que comprender necesita pivotes, término utilizado para integrar hallazgos en varias áreas. De tal manera, un pivote puede ser entendido como un modelo mental. Un pivote también es el cuerpo, idea que surge del concepto de cognición corporizada. Pero tal vez más fundamental, la biología y el cerebro son los pivotes esenciales para comprender. Así, el ensayo se puede ver como un recorrido breve de tres materias: modelos mentales, cognición corporizada y neurociencias cognitivas; todas necesarias para entender cómo comprende una persona
3

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

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4

STAREC, Milan. "Brewery Radvanice." Kvasny Prumysl 56, no. 1 (January 1, 2010): 24–27. http://dx.doi.org/10.18832/kp2010004.

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5

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 (November 16, 2019): 2349–82. http://dx.doi.org/10.1007/s10115-019-01423-5.

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6

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 (April 23, 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.
7

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

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8

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 (April 26, 2017): 359–76. http://dx.doi.org/10.1007/s11127-017-0450-z.

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9

Geisinger, Elliott. "President’s Message: Pivotal Times – But Which Way Will the Pivot Point?" ASA Bulletin 34, Issue 3 (August 1, 2016): 561–64. http://dx.doi.org/10.54648/asab2016047.

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10

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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Статті в журналах Дисертації Книги

Дисертації з теми "Pivoter":

1

Ingold, Jean-Luc. "Pour le développement d'une approche systémique de la notion de pivot : une étude de cas exploratoire d'une startup française." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0295.

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Le concept de pivot reçoit beaucoup d'attention sur internet, dans le milieu de l'enseignement, par les accélérateurs de start-up et chercheurs en ingénierie. Toutefois, ce concept reste encore peu exploré dans le domaine scientifique et plus particulièrement en sciences de gestion. De plus, la littérature traitant du sujet n'aborde pas explicitement le processus de pivot de manière systémique en considérant l'entrepreneur, ses artefacts et les acteurs de son écosystème comme un tout indissociable. Par conséquent, l'objectif de ce travail de recherche est de comprendre le processus de pivot dans sa complexité en considérant cette triade comme étant le plus petit élément d'étude. Cette thèse, reposant sur un paradigme épistémologique constructiviste, considère l'entreprise comme un système complexe dont l'intelligibilité doit être trouvée non seulement dans le système lui-même, mais également dans les relations que ce système entretient avec son environnement.La résolution de cette problématique de recherche autour de la notion de pivot s'est déroulée en deux étapes. Dans un premier temps, une revue de la littérature est effectuée et trois propositions de recherche ainsi qu'une modélisation systémique du processus de pivot sont construites par rapport à celle-ci. Dans un deuxième temps, ces propositions et cette modélisation sont confrontées au terrain par le biais d'une étude de cas afin d'évaluer leur robustesse. À la suite de cela, la modélisation systémique du processus de pivot construite par rapport à la littérature est ajustée en conséquence. L'originalité de cette thèse réside dans la grille de lecture systémique mobilisée pour aborder la complexité du processus de pivot. Cette grille de lecture est la triade entrepreneur, artefacts et acteurs de l'écosystème, ainsi que les interactions entre les éléments de cette triade.Cette thèse apporte quatre contributions. Premièrement, elle met en avant une vision holistique du processus de pivot basé sur la systémique. Deuxièmement, elle propose un point de départ pour de futures recherches autour de la notion de pivot. Ce point de départ repose sur une modélisation systémique du processus de pivot validée par une étude de cas. Troisièmement, elle suggère aux entrepreneurs de conserver de la variété au niveau de leur organisation afin d'être plus à même de s'adapter aux changements survenant dans leur environnement. Cette variété se rapporte non seulement au nombre d'éléments présents dans l'organisation, mais également au nombre d'interactions que ces éléments entretiennent les uns avec les autres. Quatrièmement, elle offre une nouvelle définition du concept de pivot basée sur la systémique
The term pivoting is widely used on the internet, in the educational community, by start-up accelerators and engineering researchers. However, pivoting is still little explored in the scientific field, particularly in management sciences. Moreover, the literature on the subject does not explicitly address the process of pivoting by considering the entrepreneur, his artifacts, and the actors of his ecosystem as an inseparable whole. Therefore, this thesis aims to understand the process of pivoting by considering this triad as the smallest element of study. This thesis, based on a constructivist epistemological paradigm, considers the company as a complex system whose intelligibility must be found not only in the system itself but also in the relations that the system has with its environment.The resolution of this research problem was carried out in two stages. In the first stage, based on the literature on pivoting, three research propositions and a systemic model of the process of pivoting are developed. In the second stage, these research propositions and this model are tested empirically utilizing a case study. Following this, the systemic model of the process of pivoting developed from the literature is adjusted accordingly. The originality of this thesis lies in the systemic reading grid used to address the complexity of the pivot process. This reading grid is the triad of entrepreneurs, artifacts, and ecosystem actors, as well as the interactions between the elements of this triad.This thesis makes four contributions. First, it puts forward a holistic view of the process of pivoting based on system theory. Secondly, it provides a starting point for future research on pivoting. This starting point is based on systemic modeling of the process of pivoting validated by a case study. Thirdly, it suggests that entrepreneurs should maintain variety in their organization to better adapt to environmental changes. This variety refers not only to the number of elements present in the organization but also to the number of interactions these elements have. Fourthly, it offers a new definition of pivoting based on system theory
2

Zlámalová, Ivuna. "Bruntálský Pivovar." Master's thesis, Vysoké učení technické v Brně. Fakulta architektury, 2014. http://www.nusl.cz/ntk/nusl-216092.

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Strategy of restoring the city values and its identity considering the strengthening of its social and economic position according to the current needs." The task of my thesis is trying to find the genuinity again, which will be making the city more stable and sustainable.
3

Němeček, Pavel. "Pivovar Hoppy Friends." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372118.

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The thesis deals with design of brewery Hoppy Friends, situated in Moravská Třebová. The building is designed with 3 floors and is a basement. On the basement is lager cellar with coolbox. On the first floor is a brewery with grain storage, visitor center, brewery facility, boiler room and a shop. On the second floor are offices and laboratories. The brewery building is designed from a masonry systém with a ventilated facade with wooden and aluminium lining, foundation on strip foundation with warm flat roof.
4

Oury, David. "Free braided pivotal categories." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=97984.

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Free braided pivotal categories are equivalent to free strict monoidal categories on a graph with relations. This is important in the study of knot invariants in that new invariants can be constructed simply by finding suitable strict monoidal categories.
This is demonstrated by developing the formal language of strict monoidal categories on a graph with relations, creating categories with relations corresponding to the Reidemeister moves of knot theory and finally showing that these categories are in fact free braided pivotal categories and further equivalent to the categories of link diagrams from knot theory.
5

Mosler, Štěpán. "Historický pivovar - potenciál regionálního rozvoje." Doctoral thesis, Vysoké učení technické v Brně. Fakulta architektury, 2018. http://www.nusl.cz/ntk/nusl-372327.

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Nowadays there are hundreds of breweries scattered throughout Bohemia, Moravia and Silesia, waiting for their new future. They are either abandoned or in private property. In the worst case they have been deteriorating with no hope of recovery. There are not many left. It is very difficult to find a new function and especially enlightened investor. Important thing is how we will treat with these structures in the future. Will we use this unique potential, or leave this place for a new function? Which way we can choose? What is the potential of these buildings and what they need? This thesis attempts to briefly describe and demonstrate the value of brewery architecture which due to dramatic changes in society became endangered. And to offer possible solutions for the preservation this unique buildings their charm and atmosphere for the next generations.
6

Borecká, Kateřina. "Ocenění podniku Rodinný pivovar Bernard." Master's thesis, Vysoká škola ekonomická v Praze, 2008. http://www.nusl.cz/ntk/nusl-9276.

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The goal of thesis is market value determination of Rodinný pivovar BERNARD for owners. Theoretic part describes categories of value and the basic methods for valuation. Practical part contains strategic and financial analysis, financial plan and valuation. For valuation was applied DCF method(FCFF), book value and market comparison method.
7

Stejskalová, Andrea. "Ocenění podniku Pivovar Náchod, a.s." Master's thesis, Vysoká škola ekonomická v Praze, 2008. http://www.nusl.cz/ntk/nusl-9334.

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The graduation thesis is focused on the determination of the market value of the company. The theoretic part describes the methodology procedure - strategic analysis,financial analysis, financial plan and pricing methods (DCF).The practical part presents the application of methods. The goal is the setting of the market value.
8

Podolský, Jiří. "Ocenění společnosti Únětický pivovar a.s." Master's thesis, Vysoká škola ekonomická v Praze, 2013. http://www.nusl.cz/ntk/nusl-192734.

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The thesis aims to determine the value of equity of the company Únětický pivovar, a. s. as of January 1st, 2014. It does not have a theoretical and practical part as usual. It is a complex unit, in which the concepts and methods are explained straight away. The paper is divided into five main parts. Introduction of company profile is followed by strategic analysis, which deals with analysis of the external potential of beer market and internal potential of the company. The next part, financial analysis, gives a picture of financial results, health and stability of the company and other comparable breweries. The output of the chapter Value drivers is the financial plan, which is crucial for company valuation using the method of discounted cash flow (DCF). The final chapter contains an application of Monte Carlo simulations, which enriches the conclusions by offering probability distribution of the value of the company.
9

Vasilišin, Ľubomír. "Ocenenie spoločnosti Pivovar ZUBR a.s." Master's thesis, Vysoká škola ekonomická v Praze, 2015. http://www.nusl.cz/ntk/nusl-205291.

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The aim of this Master's thesis is to evaluate the market value of the Zubr Brewery a.s., to the 1.1.2014. The main method selected for estimating the value of the company is discounted cash-flows for creditors and owners, also known as DCF entity. The early chapters are dedicated to making financial and strategic analysis of the company and of its competitors. After confirmation of going concern, the generators are defined and financial plan is executed, which serves as the key of the valuation using the income methods. The final value of the company is complemented by the valuation using book value method and multiples. In the end, the chapter deals with deferred tax liability and its possible use in the planning of forecast of the company.
10

Dvořák, Jan. "Ocenění podniku Pardubický pivovar a.s." Master's thesis, Vysoká škola ekonomická v Praze, 2015. http://www.nusl.cz/ntk/nusl-205699.

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The thesis "Business valuation of Pardubický pivovar a.s." is divided into six parts. The first part is devoted to the description of the business. In the next parts follow strategic and financial analysis. In the fourth part are analysed and forecasted value drivers resulting in building a financial plan of the business. The valuation is made consequently by DCF entity method using parametric formula for terminal value. Last part is devoted to the theoretical concept of determining beta by bottom-up approach with a simple example.
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Книги з теми "Pivoter":

1

Defensa, Spain Ministerio de. Irán como pivote geopolítico. Madrid: Ministerio de Defensa, 2010.

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2

Gunderson, Jessica Sarah. Pivotal moments. Mankato, MN: Creative Paperbacks, 2012.

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3

Gunderson, Jessica Sarah. Pivotal moments. Mankato, MN: Creative Education, 2011.

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4

Richfield, Robert. A pivotal perspective. New York: Alan Klotz Gallery, 2008.

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5

Vrána, Filip. Pivovar v Olešnici. Brno: Emitos, 2010.

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6

Arteaga, Remy, and Joanne Hyland. Pivot. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118778852.

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7

Segal, Lauren. Great lives: Pivotal moments. Auckland Park, South Africa: Jacana, 2008.

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8

Dohlman, Jenny C., and Alice C. Lorch, eds. Pivotal Trials in Ophthalmology. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63978-5.

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9

Segal, Lauren. Great lives: Pivotal moments. Auckland Park, South Africa: Jacana, 2008.

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10

Jelen, Bill. Pivot tables. Harlow: Prentice Hall, 2007.

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Частини книг з теми "Pivoter":

1

Nahler, Gerhard. "pivotal data." In Dictionary of Pharmaceutical Medicine, 140. Vienna: Springer Vienna, 2009. http://dx.doi.org/10.1007/978-3-211-89836-9_1066.

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2

Nahler, Gerhard. "pivotal study." In Dictionary of Pharmaceutical Medicine, 140. Vienna: Springer Vienna, 2009. http://dx.doi.org/10.1007/978-3-211-89836-9_1067.

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3

Ricchiuti, Diego. "Pivotal Documents." In Game Design Tools, 215–38. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003229438-23.

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Sharma, Anu. "Pivotal Geography." In Through the Looking Glass, 271–98. London: Routledge, 2021. http://dx.doi.org/10.4324/9781003275978-8.

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5

Sellers-Young, Barbara, Rosina McCutcheon, and Peter Dickinson. "Narrative Pivots." In Narrative in Performance, 241–82. London: Macmillan Education UK, 2019. http://dx.doi.org/10.1057/978-1-352-00417-5_14.

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6

von Windheim, Jesko. "Pivot." In The Startup, 97–106. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-45078-6_12.

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7

Koegel, Lynn Kern, Kristen Ashbaugh, and Robert L. Koegel. "Pivotal Response Treatment." In Evidence-Based Practices in Behavioral Health, 85–112. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30925-5_4.

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8

Park, Mi Na. "Pivotal Response Training." In Encyclopedia of Autism Spectrum Disorders, 2266. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4419-1698-3_128.

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9

Clancy, Ann L., and Jacqueline Binkert. "A Pivotal Journey." In Pivoting, 1–17. New York: Palgrave Macmillan US, 2016. http://dx.doi.org/10.1057/978-1-137-60263-3_1.

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10

Silvester, Katie. "A Pivotal Praxis." In Plurilingual Pedagogies for Multilingual Writing Classrooms, 111–24. New York: Routledge, 2021. http://dx.doi.org/10.4324/9781003257370-10.

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Тези доповідей конференцій з теми "Pivoter":

1

Lanata, Karina, Pablo Benítez, and Gerardo Matturro. "Pivoteo en emprendimientos de software. Motivos, proceso y evaluación." In Congresso Ibero-Americano em Engenharia de Software. Sociedade Brasileira de Computação, 2022. http://dx.doi.org/10.5753/cibse.2022.20976.

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Diversos estudios afirman que las startups de software fracasan en los primeros meses o años, generalmente porque no validaron su hipótesis de negocio, y reusan implementar cambios denominados pivotes. En este trabajo presentamos los resultados del estudio de campo cuyo propósito fue identificar cómo se deciden, implementan y evalúan los “pivot” en las startups de software. A partir de entrevistas a fundadores de diez startups de software, se encuentra que los factores más comunes que generan la necesidad de pivotar son: “reacción negativa de los clientes”, “reacción positiva de un segmento de clientes no previsto” y “enfoque en el mercado objetivo”, y los pivotes más utilizados son “Tecnología”, “Captura de valor” y “Segmento de clientes”.
2

Chen, Shizhe, Qin Jin, and Jianlong Fu. "From Words to Sentences: A Progressive Learning Approach for Zero-resource Machine Translation with Visual Pivots." In Twenty-Eighth International Joint Conference on Artificial Intelligence {IJCAI-19}. California: International Joint Conferences on Artificial Intelligence Organization, 2019. http://dx.doi.org/10.24963/ijcai.2019/685.

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The neural machine translation model has suffered from the lack of large-scale parallel corpora. In contrast, we humans can learn multi-lingual translations even without parallel texts by referring our languages to the external world. To mimic such human learning behavior, we employ images as pivots to enable zero-resource translation learning. However, a picture tells a thousand words, which makes multi-lingual sentences pivoted by the same image noisy as mutual translations and thus hinders the translation model learning. In this work, we propose a progressive learning approach for image-pivoted zero-resource machine translation. Since words are less diverse when grounded in the image, we first learn word-level translation with image pivots, and then progress to learn the sentence-level translation by utilizing the learned word translation to suppress noises in image-pivoted multi-lingual sentences. Experimental results on two widely used image-pivot translation datasets, IAPR-TC12 and Multi30k, show that the proposed approach significantly outperforms other state-of-the-art methods.
3

Miller, David J., and Milo V. Kral. "The Selection and Testing of Compression Seal and Chamber Coating Materials for the Pivotal™ Engine." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64379.

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The Pivotal™ Engine was conceived by Pivotal Engineering LTD to overcome some of the inherent problems associated with a conventional two-cycle engine, such as high wear rates and friction losses due to piston tilt and large port openings, reliability problems due to lack of control over piston temperatures and high oil consumption. The Pivotal engine is an Otto cycle two-stroke engine. The engine is assembled from 500cc modules utilizing a rectangular piston that pivots on a plain bearing at one end. The pivoting motion of the piston allows coolant to enter the piston through the centre of the pivot giving temperature control of the combustion chamber while restraining the piston so it has little or no contact with the chamber walls. Although friction loss, temperature control and oil consumption problems have thus been mitigated, prototype engines still experienced problems with high compression seal wear rates. Compression seals run in a reciprocating motion along a flat chamber wall, somewhat analogous to piston rings in a conventional engine, although velocity varies along the seal length. The goal of this research is therefore to select and test compression seals materials to obtain an adequate working life in the Pivotal engine. Based on the rotational tribometer results, the most promising chamber coating so far is plasma sprayed iron with molybdenum and the most promising seal material is reaction bonded silicon nitride.
4

Pei, Xu, Jingjun Yu, Shusheng Bi, and Guanghua Zong. "A Family of Butterfly Flexural Joints: Q-LITF Pivots." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48394.

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The Leaf-type Isosceles-Trapezoidal Flexural (LITF) pivot consists of two compliant beams and two rigid-bodies. For a single LITF pivot, the range of motion is small while the center-shift is relatively large. The capability of performance can be improved greatly by the combination of four LITF pivots. Base on the pseudo-rigid-body model (PRBM) of a LITF pivot, a method to construct the Quadri-LITF pivots is presented by regarding a single LITF pivot (or double-LITF pivot) as a the configurable flexure module. Ten types of Q-LITF pivots are synthesized. Compared with the single LIFT pivot, the stroke becomes larger, and stiffness becomes smaller. Four of them have the increased center-shift. The other four have the decreased center-shift. One of the quadruple LITF pivots is selected as the examples to explain the proposed method. The comparison between PRBM and Finite Element Analysis (FEA) result shows the validity and effectiveness of the method.
5

He, Feng. "Including Pivot Friction in Pad Motion for a Tilting Pad Journal Bearing With Ball-Socket Pivots." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-65240.

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Tilting pad journal bearing has its wide application in turbomachinery. For years, frictionless contact has been assumed for all the contact types in bearing coefficients prediction of tilting pad bearings. Existing experimental data demonstrates contact friction does present in pivots and can prevent pads from effective tilting, which is especially true for the surface contact pivot, e.g. ball-socket pivot. However, no open literature is available to discuss individual pad motion with consideration of pivot contact friction and document the effects on the dynamic behaviors of tilting pad bearings. This paper tries to improve the understanding in this area by discussing the pad motion of a tilting pad bearing with ball-socket pivots subject to pivot friction. A model, which couples the journal motion, hydrodynamic pressure from oil film and contact pressure within the pivots, is established. Instead of Hertz contact, a conformal contact model is applied for the ball-socket contact. Through the coupled transient analyses, the effects of contact friction coefficients, bearing dynamic and static loading, and pivot size on pads motion of a 5-pads load-on-pad bearing are considered and compared. The results show that the presence of friction within ball-socket pivots does not guarantee “locked up” pads motion, but only limits pads from effective tilting for a given range of friction coefficients. Larger dynamic load increases pad tilting amplitude; this does not mean that enlarged tilting magnitudes reduce pivot friction moments for the pads. With varying bearing loads, the pivot friction could result in non-synchronous motion of pads tilting and pivots deformation and bring these non-synchronous components into the journal vibration. Size-reduced pivots are found to diminish the effects of pivot friction and offer preferred pads dynamics and journal vibration.
6

Bandera, Cesar, and Ellen Thomas. "To Pivot or Not To Pivot: On the Relationship between Pivots and Revenue among Startups." In Hawaii International Conference on System Sciences. Hawaii International Conference on System Sciences, 2019. http://dx.doi.org/10.24251/hicss.2019.655.

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7

Li, Tian, Xiang Chen, Zhen Dong, Kurt Keutzer, and Shanghang Zhang. "Domain-Adaptive Text Classification with Structured Knowledge from Unlabeled Data." In Thirty-First International Joint Conference on Artificial Intelligence {IJCAI-22}. California: International Joint Conferences on Artificial Intelligence Organization, 2022. http://dx.doi.org/10.24963/ijcai.2022/585.

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Domain adaptive text classification is a challenging problem for the large-scale pretrained language models because they often require expensive additional labeled data to adapt to new domains. Existing works usually fails to leverage the implicit relationships among words across domains. In this paper, we propose a novel method, called Domain Adaptation with Structured Knowledge (DASK), to enhance domain adaptation by exploiting word-level semantic relationships. DASK first builds a knowledge graph to capture the relationship between pivot terms (domain-independent words) and non-pivot terms in the target domain. Then during training, DASK injects pivot-related knowledge graph information into source domain texts. For the downstream task, these knowledge-injected texts are fed into a BERT variant capable of processing knowledge-injected textual data. Thanks to the knowledge injection, our model learns domain-invariant features for non-pivots according to their relationships with pivots. DASK ensures the pivots to have domain-invariant behaviors by dynamically inferring via the polarity scores of candidate pivots during training with pseudo-labels. We validate DASK on a wide range of cross-domain sentiment classification tasks and observe up to 2.9% absolute performance improvement over baselines for 20 different domain pairs. Code is available at https://github.com/hikaru-nara/DASK.
8

Liu, Lang, Hongzhe Zhao, Shusheng Bi, and Jingjun Yu. "Research of Performance Comparison of Topology Structure of Cross-Spring Flexural Pivots." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-34006.

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Cross-Spring Flexural Pivot (CSFP) has some advantages compared with rigid bearing. However, this kind of flexural pivot is limited in the field of precision positioning due to its small motion stroke, large axis drift, and sensitivity to temperature, etc. In this paper, topology structures of the CSFP were analyzed through defining different geometric parameters λ, spring crossing angle α, and spring number N. Characteristics of stiffness, axis drift, maximum stress, and temperature drift were compared and summarized by the Finite Element Analysis (FEA). Ultimately, a class of flexural pivots, called Inner and Outer Ring Flexural Pivots (IORFP), were selected for their excellent comprehensive performances. This type of flexural pivots has some significant advantages, such as large stroke, approximate zero axis drift and no temperature drift. Finally, the stiffness characteristic of IORFP with different geometrical parameters λ was compared by FEA, and law of stiffness variation was obtained. When λ is 0.1273, the IORFP has linear stiffness characteristics.
9

Huo, Tonglong, Jingjun Yu, Hongzhe Zhao, and Xian Wei. "A Family of Novel Compliant Linear-Motion Mechanisms Based on Compliant Rolling-Contact Element Pivot." In ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/detc2021-69887.

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Abstract Compliant linear-motion mechanisms are of great use in precision machines, due to their excellent performances such as infinite resolution and low cost. The accuracy of the mechanisms is an important consideration for mechanical design in applications, especially in the case of large working load. Considering Compliant Rolling-contact Element (CORE) pivot is characterized with high bearing capacity, the paper adopts it as a building block to design a family of compliant linear-motion mechanisms for heavy load applications. These mechanisms are achieved by replacing four rigid pivots in parallel four-bar mechanism with CORE pivots, and the motion accuracy is improved by means of contacting surfaces design of four CORE pivots. Firstly, the CORE pivot is introduced and five extended arrangements for bearing heavy load are given. Meanwhile, configuration of the compliant linear-motion mechanisms constructed by CORE pivots is obtained. In addition, kinematics of the mechanisms is analyzed and parametric design condition for achieving rectilinear motion is modeled. Based on the condition, detailed topological structures of the mechanisms are designed. Finally, motion simulations are implemented to verify accuracy of the proposed mechanisms. The results demonstrate that the mechanisms proposed in this paper are capable of offering a high-precision linear motion and providing a promising application prospect in precision machines.
10

San Andrés, Luis, Yujiao Tao, and Yingkun Li. "Tilting Pad Journal Bearings: On Bridging the Hot Gap Between Experimental Results and Model Predictions." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25566.

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The accurate prediction of the forced performance of tilting pad journal bearings (TPJB) relies on coupling a fluid film model that includes thermal energy transport, and on occasion fluid inertia, to the structural stiffness of the pads’ pivots and the thermomechanical deformation of the pads’ surfaces. Often enough, the flexibility of both pads and pivots is ignored prior to the bearing actual operation; practice dictating that force coefficients, damping in particular, decrease dramatically due to pivot flexibility. Even in carefully conducted experiments, components’ flexibilities are invoked to explain dramatic differences between measurements and predictions. A multiple-year test program at TAMU has demonstrated the dynamic forced response of TPJBs can be modeled accurately with matrices of constant stiffness K, damping C, and added mass M coefficients. The K-C-M model, representing frequency independent force coefficients, is satisfactory for excitation frequencies less or equal to the shaft synchronous speed. However, as shown by the authors in Ref. [1], pivot flexibility reduces the applicability of the simple constant parameter model to much lower excitation frequencies. Presently, a fluid film flow model predicts the journal eccentricity and force coefficients of a five-pad rocker-back TPJB tested at TAMU under a load-between-pad (LBP) configuration. The predictions agree well with the test results provided the model uses actual hot bearing clearances and an empirical characterization of the pivot stiffness. A study follows to determine the effects of pad preload, r¯p = 0.0, 0.27 (test article) and 0.50, as well as the load orientation, LBP and load-on-pad (LOP), on bearing performance with an emphasis on ascertaining the configuration with most damping and stiffness, largest film thickness, and the least drag friction. In the study, a rigid pivot and two flexible pivots are considered throughout. Further examples present the effective contribution of the pads’ mass and mass moment of inertia and film fluid inertia on the bearing force coefficients. To advance results of general character, predictions are shown versus Sommerfeld number (S), a design parameter proportional to shaft speed and decreasing with applied load. Both LBP and LOP configurations show similar performance characteristics; the journal eccentricity increasing with pivot flexibility. For LBP and LOP bearings with 0.27 preload, pivot flexibility decreases dramatically the bearing damping coefficients, in particular at the low end of S, i.e., large loads. The model and predictions aid to better design TPJBs supporting large specific loads.

Звіти організацій з теми "Pivoter":

1

Kramer, Mitchell. Pivotal Acquires MarketFirst. Boston, MA: Patricia Seybold Group, October 2002. http://dx.doi.org/10.1571/vs10-18-02cc.

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2

Gee, Laura, Anoushka Kiyawat, Jonathan Meer, and Michael Schreck. Pivotal or Popular: The Effects of Social Information and Feeling Pivotal on Civic Actions. Cambridge, MA: National Bureau of Economic Research, March 2023. http://dx.doi.org/10.3386/w31042.

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3

Mitchell, Pamela S. National Security Strategy: Engagement or Pivotal States. Fort Belvoir, VA: Defense Technical Information Center, January 1998. http://dx.doi.org/10.21236/ada441487.

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4

Mulligan, Casey, and Charles Hunter. The Empirical Frequency of a Pivotal Vote. Cambridge, MA: National Bureau of Economic Research, November 2001. http://dx.doi.org/10.3386/w8590.

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5

Jussel, Paul C. Operational Implications of Pivots of Maneuver,. Fort Belvoir, VA: Defense Technical Information Center, September 1991. http://dx.doi.org/10.21236/ada240322.

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6

Heger, A. S. Good relationships are pivotal in nuclear databases. Final report. Office of Scientific and Technical Information (OSTI), October 1995. http://dx.doi.org/10.2172/119474.

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7

Shu, Suzanne, Robert Zeithammer, and John Payne. The Pivotal Role of Fairness: Which Consumers Like Annuities? Cambridge, MA: National Bureau of Economic Research, September 2018. http://dx.doi.org/10.3386/w25067.

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8

Wang, Lie, Victor Chernozhukov, and Alexandre Belloni. Pivotal estimation via square-root lasso in nonparametric regression. Institute for Fiscal Studies, December 2013. http://dx.doi.org/10.1920/wp.cem.2013.6213.

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9

Frash, Luke. PIVOT 2023 Datathon: GeoDT Bootcamp. Office of Scientific and Technical Information (OSTI), April 2023. http://dx.doi.org/10.2172/1972086.

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10

Castle, James M. Pivots of Operations: Implications for Operational Sustainment Design. Fort Belvoir, VA: Defense Technical Information Center, May 1991. http://dx.doi.org/10.21236/ada243305.

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