Relevant bibliographies by topics / Non Cartan dynamics

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Non Cartan dynamics'

Author: Grafiati
Published: 14 March 2023
Last updated: 31 July 2025

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Journal articles on the topic "Non Cartan dynamics"

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Bondarenko, Sergey. "Dynamical Signature: Complex Manifolds, Gauge Fields and Non-Flat Tangent Space." Universe 8, no. 10 (2022): 497. http://dx.doi.org/10.3390/universe8100497.

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Theoretical possibilities of models of gravity with dynamical signature are discussed. The different scenarios of the signature change are proposed in the framework of Einstein-Cartan gravity. We consider, subsequently, the dynamical signature in the model of the complex manifold with complex coordinates and complex metrics are introduced, a complexification of the manifold and coordinates through new gauge fields, an additional gauge symmetry for the Einstein-Cartan vierbein fields, and non-flat tangent space for the metric in the Einstein-Cartan gravity. A new small parameter, which characte
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Rubin, Jacques. "Applications of a Particular Four-Dimensional Projective Geometry to Galactic Dynamics." Galaxies 6, no. 3 (2018): 83. http://dx.doi.org/10.3390/galaxies6030083.

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Relativistic localizing systems that extend relativistic positioning systems show that pseudo-Riemannian space-time geometry is somehow encompassed in a particular four-dimensional projective geometry. The resulting geometric structure is then that of a generalized Cartan space (also called Cartan connection space) with projective connection. The result is that locally non-linear actions of projective groups via homographies systematically induce the existence of a particular space-time foliation independent of any space-time dynamics or solutions of Einstein’s equations for example. In this a
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Agop, Maricel, Tudor-Cristian Petrescu, Dumitru Filipeanu, et al. "Toward Complex Systems Dynamics through Flow Regimes of Multifractal Fluids." Symmetry 13, no. 5 (2021): 754. http://dx.doi.org/10.3390/sym13050754.

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In the framework of the Multifractal Theory of Motion, which is expressed by means of the multifractal hydrodynamic model, complex system dynamics are explained through uniform and non-uniform flow regimes of multifractal fluids. Thus, in the case of the uniform flow regime of the multifractal fluid, the dynamics’ description is “supported” only by the differentiable component of the velocity field, the non-differentiable component being null. In the case of the non-uniform flow regime of the multifractal fluid, the dynamics’ description is “supported” by both components of the velocity field,
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Re, Federico, and Oliver F. Piattella. "Non-Zero Coriolis Field in Ehlers’ Frame Theory." Galaxies 13, no. 2 (2025): 38. https://doi.org/10.3390/galaxies13020038.

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Ehlers’ Frame Theory is a class of geometric theories parameterized by λ:=1/c2 and identical to the General Theory of Relativity for λ≠0. The limit λ→0 does not recover Newtonian gravity, as one might expect, but yields the so-called Newton–Cartan theory of gravity, which is characterized by a second gravitational field ω, called the Coriolis field. Such a field encodes at a non-relativistic level the dragging feature of general spacetimes, as we show explicitly for the case of the (η,H) geometries. Taking advantage of the Coriolis field, we apply Ehlers’ theory to an axially symmetric distrib
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Racioppi, Antonio, and Alberto Salvio. "Natural metric-affine inflation." Journal of Cosmology and Astroparticle Physics 2024, no. 06 (2024): 033. http://dx.doi.org/10.1088/1475-7516/2024/06/033.

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Abstract We consider here natural inflation in the low energy (two-derivative) metric-affine theory containing only the minimal degrees of freedom in the inflationary sector, i.e. the massless graviton and the pseudo-Nambu-Goldstone boson (PNGB). This theory contains the Ricci-like and parity-odd Holst invariants together with non-minimal couplings between the PNGB and the above-mentioned invariants. The Palatini and Einstein-Cartan realizations of natural inflation are particular cases of our construction. Explicit models of this type featuring non-minimal couplings are shown to emerge from t
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Podrigalo, Mikhail, Volodymyr Peregon, Oleksandr Boboshko, Dmitrij Bogdan, and Oleksandr Koriak. "Kinematics of Hooke’s Joint." Vehicle and electronics. Innovative technologies, no. 21 (July 2, 2022): 48–56. http://dx.doi.org/10.30977/veit.2022.21.0.09.

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Problem. An analysis of the literature has shown that some issues of the kinematics and dynamics of the Hooke’s joint are not fully covered. In particular, this applies to the determination of the kinematic characteristics of the relative movements of the links in the movable joints of the crosspieces and cardan yokes, as well as the acceleration of the crosspiece in the study of the hinge. These kinematic characteristics are the basis for dynamic analysis of the cardan transmission; they are used at research of operation of the bearings of a cardan joint cross; they are necessary to determine
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Šuk, Jaroslav, Kateřina Hamouzová, Jana Hajšlová, and Miroslav Jursík. "Dynamics of herbicides degradation in carrot (Daucus carota L.) roots and leaves." Plant, Soil and Environment 67, No. 6 (2021): 353–59. http://dx.doi.org/10.17221/46/2021-pse.

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This research had two main aims. First, to analyse the degradation dynamics of herbicides commonly used in carrot (aclonifen, clomazone, flufenacet, linuron, metribuzin, pendimethalin, S-metolachlor). Second, to compare the amount of herbicide residues with the maximum residue level and with requirements of non-residual production. The field experiments were conducted in 2012–2016. All tested herbicides resulted in relatively low concentrations of residues in carrot roots (up to 10 µg/kg) when the recommended withdrawal period was followed between application and harvest. The concentration of
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Tomchina, Olga P. "Control of vibrational field in an elastic vibration unit with DC motors and time-varying observer." Cybernetics and Physics, Volume 10, 2021, Number 4 (December 31, 2021): 277–86. http://dx.doi.org/10.35470/2226-4116-2021-10-4-277-286.

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In the paper the problem of feedback control of vibrational fields in a vibration unit is analyzed taking into account the influence of the elasticity of cardan shafts, the drive dynamics, saturation for control torques. In addition, the synthesized rotor synchronization control algorithm uses the estimates of a non-stationary observer, which makes it possible to implement it practically on a two-rotor vibration unit SV-2. The performance of the closed loop mechatronic systems is examined by simulation for the model of the two-rotor vibration unit SV-2.
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Stoeva, Lora, and Lora Kirova. "Assessing the carbon stock changes in forest soils in Bulgaria." Silva Balcanica 22, no. (3) (2021): 69–78. https://doi.org/10.3897/silvabalcanica.22.e76252.

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Forest soils are a key element of the forest ecosystems which could contribute to carbon storage and climate change mitigation. The carbon sequestration and storage potential of the forest soils, however, depends to a great extent on the forestry operations and forest management activities carried out in the forest. There is a widely accepted assumption that under a set of climate and management conditions the carbon content in the forest soils is at equilibrium. However, different factors like management activities, productivity, decay rates and/or natural disturbances could alter the carbon
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Arda, M., and M. Aydogdu. "Nonlocal Gradient Approach on Torsional Vibration of CNTs." NOISE THEORY AND PRACTICE 3, no. 3 (2017): 2–10. https://doi.org/10.5281/zenodo.1470367.

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The nonlocal strain gradient approach for torsional vibration of CNTs have been investigated in the present study. The effects of the stress and strain gradient small scale parameters on the non-dimensional frequencies have been obtained. Strain Gradient Theory has stiffening effect on the dynamics of CNT. Combination of both theories gives more acceptable results according to Lattice Dynamics.
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Dissertations / Theses on the topic "Non Cartan dynamics"

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Terna, Stefano. "Strong Coupling Analysis of D=2 and D=4 Maximally Supersymmetric YM Theories." Doctoral thesis, SISSA, 2000. http://hdl.handle.net/20.500.11767/4330.

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Cannon, James J. "Non-equilibrium molecular dynamics simulations of flow through carbon nanotubes." Thesis, University of Surrey, 2009. http://epubs.surrey.ac.uk/843548/.

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With increasing pressure on resources, filtration plays a key role in the lives of everyone on this planet. This can, for example, be in terms of desalination to obtain clean drinking water, hydrocarbon separation for gasoline production, or gas separation to meet stringent environmental regulations. In the design of membranes for applications such as these, fast transport of atoms combined with high selectivity is desired, and aligned carbon nanotube membranes show great promise in this respect. In order to design and tailor nanotube-membranes for optimum performance in specific applications,
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Martin, Willis. "Simulation study of non-covalent hybridization of carbon nanotubes by single-stranded DNA in water." Thesis, Boston College, 2010. http://hdl.handle.net/2345/1169.

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Thesis advisor: Goran Krilov<br>Solubilization and separation is an important step in utilizing both the unique mechanical and electrical properties of carbon nanotubes (CNTs). Due to different possible chiralities of CNTs, which can have drastically different electrochemical properties, it is also necessary to have a method of separation that will distinguish between these different species. Recent discovery of single-stranded DNA (ssDNA) absorption onto CNTs have shown high affinity towards forming soluble hybrids in polar solvents. The interactions between the ssDNA and CNTs as well as the
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Evteev, Alexander V., Elena V. Levchenko, Irina V. Belova, and Graeme E. Murch. "Molecular dynamics study of carbon diffusion in cementite." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193325.

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Steele, Brad. "Non-equilibrium melting and sublimation of graphene simulated with two interatomic potentials." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4586.

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The mechanisms of the sublimation of graphene at zero pressure and the condensation of carbon vapor is investigated by molecular dynamics (MD) simulations. The interatomic interactions are described by the Reactive Empirical Bond Order potential (REBO). It is found that graphene sublimates at a temperature of 5,200 K. At the onset of sublimation, defects that contain several pentagons and heptagons are formed, that are shown to evolve from double vacancies and stone wales defects. These defects consisting of pentagons and heptagons act as nucleation sites for the gaseous phase. The influence o
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Onyestyák, György, Zsolt Ötvös, Imre Kiricsi, and Lovat V. C. Rees. "The sorption dynamics of C 3 hydrocarbons over carbon nanotubes." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-194893.

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Carbon nanotubes obtained by the catalytic vapor deposition (CVD) method were purified by various procedures to obtain samples in pure and well-defined forms. The frequency response (FR) technique was employed to determine the sorption dynamics of C3-hydrocarbons in these samples. Two parallel sorption processes were found, characterized by different sorption capacities and time constants and were assigned to sorption on the convex and concave surfaces of the carbon tubes, respectively. Over a carbon nanotube sample at low coverage the mass transport is little influenced by the different chemi
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Onyestyák, György, Zsolt Ötvös, Jozsef Valyon, Imre Kiricsi, and Lovat V. C. Rees. "The sorption dynamics of C 3 hydrocarbons over carbon nanotubes." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-196636.

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Tognolini, S. "TRACKING THE INTERFACE STATES DYNAMICS AT CARBON-BASED NANOSTRUCTURES ON METAL BY NON-LINEAR PHOTOEMISSION SPECTROSCOPY." Doctoral thesis, Università degli Studi di Milano, 2016. http://hdl.handle.net/2434/362868.

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After single-layer graphene isolation in 2004, the scientific community has concentrated its efforts in the investigation of single-atom thin materials, due to their unique electronic properties, not shown by their bulk counterpart. Among this promising class of materials, two-dimensional carbon-based nanostructures have encountered a growing interest in nanotechnology, due to the huge variety of potential applications in which they are involved, from optoelectronics and photonics to energy generation, storage and solar cells. For the industrial realization of these devices a comprehensive u
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Cavalli, D. "CARBON AND NITROGEN DYNAMICS IN SOILS AFTER REPEATED MANURE APPLICATIONS: MEASUREMENTS AND MECHANISTIC SIMULATIONS." Doctoral thesis, Università degli Studi di Milano, 2011. http://hdl.handle.net/2434/152898.

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The first part of this Ph. D. Thesis (Chapters 1 and 2) is relative to the calibration of a soil organic matter simulation model (the CN-SIM model) by applying it to an experimental data-set, using two different methodologies, in order to verify its conceptual structure and obtaining parameters to describe the partitioning of C and N within the manures. Based on the optimization results, it emerged that the low model performance could be attributed to the lack of some processes involving mineral nitrogen transformations into the soil. In order to better understand the nitrogen dynamics followi
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Kreier, Daniel. "Ultrafast single-electron diffraction at 100 keV and investigation of carbon-nanotube dynamics." Diss., Ludwig-Maximilians-Universität München, 2015. http://nbn-resolving.de/urn:nbn:de:bvb:19-183901.

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Time-resolved electron diffraction is a powerful tool to observe ultrafast structural dynamics in materials and molecules with atomic spatial as well as temporal resolution. Due to Coulomb repulsion, however, the use of only single-electrons or few-electrons per pulse is inevitable to reach the shortest pulse durations. Electrons have rather high scattering cross sections and thus experiments in transmission require ultrathin samples in the nanometer-range, making sample preparation very challenging. Up to now, ultrafast single-electron diffraction was only demonstrated at an electron energy o
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Books on the topic "Non Cartan dynamics"

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Let's Talk about Constitutions. International Institute for Democracy and Electoral Assistance, 2021. http://dx.doi.org/10.31752/idea.2021.73.

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Let’s talk about constitutions! is designed to present difficult constitutional concepts to non-specialist and young audiences in an entertaining and informative way. It has been developed to promote young people’s understanding of constitutional issues and thereby empower and inspire youth to play a full and meaningful part in their own constitution-building process. With dynamic images, relatable characters and simple language, Let’s talk about constitutions! illustrates key concepts to answer the questions: what is a constitution and why is it important? The cartoon is an educational tool t
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Lally, Jagjeet. India and the Silk Roads. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197581070.001.0001.

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India and the Silk Roads is a global history of a continental interior, the first to comprehensively examine the textual and material traces of India’s caravan trade with central Asia. But what was the fate of these overland connections in the ages of sail and steam? This book brings the world of caravan trade to life—a world of merchants, mercenaries, pastoralists and pilgrims, but also of kings, bureaucrats and their subjects in the countryside and towns. Their livelihoods did not become obsolete with the advent of ‘modern’ technologies and the consequent emergence of new global networks. Te
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Knox-Hayes, Janelle. Carbon Markets: Resource Governance and Sustainable Valuation. Edited by Gordon L. Clark, Maryann P. Feldman, Meric S. Gertler, and Dariusz Wójcik. Oxford University Press, 2018. http://dx.doi.org/10.1093/oxfordhb/9780198755609.013.31.

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Carbon markets open several important avenues of inquiry into resource governance designed to address problems like climate change. The discipline of economic geography is well situated to add insight. This chapter examines the underlying assumptions behind market-based governance, particularly the emphasis on controlling greenhouse gases through pricing. The pricing of externalities alone does not guarantee the material changes in energy use now in the future that are required to combat climate change. A new framework for consideration of the spatial and temporal dynamics of value is proposed
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Christoforidis, Michael, and Elizabeth Kertesz. Carmen and the Staging of Spain. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780195384567.001.0001.

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Carmen and the Staging of Spain explores the Belle Époque fascination with Spanish entertainment that refashioned Bizet’s opera and gave rise to an international “Carmen industry.” Authors Michael Christoforidis and Elizabeth Kertesz challenge the notion of Carmen as an unchanging exotic construct, tracing the ways in which performers and productions responded to evolving fashions for Spanish style from its 1875 premiere to 1915. Focusing on selected realizations of the opera in Paris, London, and New York, Christoforidis and Kertesz explore the cycles of influence between the opera and its pa
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Taylor, Peter, Geoff O'Brien, and Phil O'Keefe. Cities Demanding the Earth. Policy Press, 2020. http://dx.doi.org/10.1332/policypress/9781529210477.001.0001.

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Current climate change policy is necessary but insufficient. This is because the basic modus operandi – presenting scientific evidence to states for them to take action - misrepresents the complex process of anthropogenic climate change. The ‘anthropo’ bit is neglected in a misconceived supply-side (carbon) interpretation. The key question is, why is there so much demand for this carbon in the first place? This book introduces a demand-side interpretation bringing cities to the fore as central players in both generating climate changes and for finding solutions. Jane Jacobs’ urban analysis is
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Coss, Peter. The Aristocracy in England and Tuscany, 1000 - 1250. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198846963.001.0001.

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Part I of this book is an in-depth examination of the characteristics of the Tuscan aristocracy across the first two and a half centuries of the second millennium, as studied by Italian historians and others working within the Italian tradition: their origins, interests, strategies for survival and exercise of power; the structure and the several levels of aristocracy and how these interrelated; the internal dynamics and perceptions that governed aristocratic life; and the relationship to non-aristocratic sectors of society. It will look at how aristocratic society changed across this period a
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Kayizzi-Mugerwa, Steve. Uganda’s nascent oil sector: Revenue generation, investor-stakeholder alignment, and public policy. UNU-WIDER, 2020. http://dx.doi.org/10.35188/unu-wider/2020/932-7.

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This paper discusses the political economy of oil in Uganda since the announcement of its discovery in 2006. It focuses on the dynamics of oil revenue generation (pre-commercial production) and expenditure, investor-stakeholder contestation (i.e. between bureaucrats, investors/oil companies, and domestic stakeholders), and the role of public policy. Although the Government has created several institutional and regulatory frameworks to manage oil-related revenues and ensure that oil contributes to structural transformation, Uganda is already experiencing many of the stylized facts associated wi
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Humphreys, John, and Sally Little, eds. Challenges in Estuarine and Coastal Science. Pelagic Publishing, 2022. http://dx.doi.org/10.53061/bdix4458.

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Estuarine and coastal waters are acknowledged centres for anthropogenic impacts. Superimposed on the complex natural interactions between land, rivers and sea are the myriad consequences of human activity – a spectrum ranging from locally polluting effluents to some of the severest consequences of global climate change. For practitioners, academics and students in the field of coastal science and policy, this book examines and exemplifies current and future challenges: from upper estuaries to open coasts and adjacent seas; from tropical to temperate latitudes; from Europe to Australia. This au
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Pavelle, Sophie. To Have or To Hold. Bloomsbury Publishing Plc, 2025. https://doi.org/10.5040/9781399412148.

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A thrilling exploration of nature’s symbiotic relationships, some comforting and familiar, others wildly alien, by the award-winning author of Forget Me Not. What can nature teach us about living together? Investigating eight symbiotic relationships trying to survive the climate and biodiversity crises, Sophie Pavelle explains why it has never been more vital for us to understand symbiosis. Symbiotic relationships regulate ecosystems, strengthen resilience and bind pivotal connections. Species living together in symbiosis is no accident – these dynamics evolved. Species form and sever alliance
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Thompson, Carmen P. Making of American Whiteness. The Rowman & Littlefield Publishing Group, 2022. https://doi.org/10.5040/9781978734432.

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The Making of American Whiteness: The Formation of Race in Seventeenth-Century Virginia changes the narrative about the origins of race and Whiteness in America. With an exhaustive array of archival documents, Carmen P. Thompson demonstrates not only that Whiteness predates European expansion to the Americas as evidenced in their participation in the transatlantic slave trade since the fifteenth century, but more importantly that it was the principal dynamic in the settlement of Virginia, the first colony in what would become the United States of America. And just as the system of White suprem
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Book chapters on the topic "Non Cartan dynamics"

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Zimmermann, Jörg, and Floyd E. Romesberg. "Carbon–Deuterium Bonds as Non-perturbative Infrared Probes of Protein Dynamics, Electrostatics, Heterogeneity, and Folding." In Protein Dynamics. Humana Press, 2013. http://dx.doi.org/10.1007/978-1-62703-658-0_6.

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Olofsson, Pontus, Curtis E. Woodcock, Alessandro Baccini, et al. "The Effects of Land Use Change on Terrestrial Carbon Dynamics in the Black Sea Region." In Regional Aspects of Climate-Terrestrial-Hydrologic Interactions in Non-boreal Eastern Europe. Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2283-7_19.

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Qi, Jianhui. "Development and Validation of a Riemann Solver in OpenFOAM for Non-ideal Compressible Fluid Dynamics." In Simulation Tools and Methods for Supercritical Carbon Dioxide Radial Inflow Turbine. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2860-4_5.

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Manzoni, Cristian, Alessio Gambetta, Giulio Cerullo, et al. "Real time observation of non-linear coherent phonon dynamics in semiconducting single wall carbon nanotubes." In Ultrafast Phenomena XV. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-68781-8_223.

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Pikner, Tarmo. "Energy Transition as Space Making: Rescaling of Accelerated Transformations in the Context of Estonia." In Rescaling Sustainability Transitions. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-69918-4_4.

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AbstractEnergy can be seen as an important mediator of relations between humans and natural environments. This chapter focuses on the spatialities of shifting oil shale-dependent energy regimes that bring together territorialisation dynamics and anticipated landscapes in rescaling processes. This study analyses the encounters and narratives within the two main spheres of energy transition in Estonia—negotiating fossil fuel dependencies and territorialising offshore wind resources. By examining these carbon-lowering spheres together, we connect rescaling processes simultaneously to legacies and
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Husain, Mushahid, and Ayub Khan. "Nanotechnology and Mathematics “Study of Non-linear Dynamic Vibration in Single Walled Carbon Nanotubes (SWNTs)”." In Mathematical Models, Methods and Applications. Springer Singapore, 2015. http://dx.doi.org/10.1007/978-981-287-973-8_9.

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Ismail, Cynthia, J. David Tàbara, Takeshi Takama, and David Saurí. "Narrative-Network Dynamics in Tipping Processes Towards Low-Carbon Energy Futures: The Case of Indonesia." In Springer Climate. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-50762-5_11.

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AbstractDeliberate actions by social networks and their transformative visions can generate the necessary conditions for the emergence of positive tipping points towards sustainability, such as those that create qualitative, structural changes in sustainable development goals. However, there is a need for more empirical research conducted in non-Western countries to assess these complex processes. In this research, we customised Integrated Sustainability Assessment (ISA) and combined it with participatory narrative analysis, social-ecological network analysis and Q-methodology to capture the t
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Petruccelli, Giuseppe, Antti Uusitalo, Aki Grönman, Teemu Turunen-Saaresti, and Marta Zocca. "Design of a Closed-Loop Supercritical Carbon Dioxide Wind Tunnel: Numerical Modelling of Non-equilibrium Condensation in a Converging-Diverging Nozzle." In Proceedings of the 3rd International Seminar on Non-Ideal Compressible Fluid Dynamics for Propulsion and Power. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69306-0_11.

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Zhang, Yidi, Xubo Cao, and Zhenzhen Li. "Interfacial Morphology of a Bubble Moving in Confined Channel Filled with Viscoelastic Fluid." In IUTAM Bookseries. Springer Nature Switzerland, 2024. https://doi.org/10.1007/978-3-031-78151-3_19.

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AbstractBubble motion in confined channels find applications ranging from carbon oxide sequestration to cardio-vascular embolism, and is ubiquitous in nature and industry. The confinement of bubbles in the channel causes the formation of a thin liquid film between gas and solid wall, whose flow field has been studied theoretically and especially for Newtonian fluids. Steadily moving bubbles in Newtonian fluids exhibits saddle shape. However, since a large amount of industrial and biological fluids are complex fluids, the motion of morphology of moving bubbles can be affected by non-Newtonian e
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Ihlein, Lucas. "Agricultural Inventiveness." In Covert Plants. punctum books, 2018. https://doi.org/10.21983/p3.0207.1.17.

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In 2014, I began working on a collaborative art project called Sug-ar vs the Reef? The project came about following an invitation from John Sweet, a retired farmer and active community worker in the Queensland town of Mackay. Sweet’s hunch was that the involvement of artists in a complex environmental management problem might help to catalyse positive transformations in the sugar cane industry, which is often accused of polluting the pris-tine waters of the Great Barrier Reef with agricultural run-off.1This chapter is based on some of the early field research for Sugar vs the Reef? and my task
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Conference papers on the topic "Non Cartan dynamics"

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Moreira, Anna Ramus, Victor Gomes Silva, Neusvaldo Lira de Almeida, Gustavo Vaz, and Luis Fernando Fiuza Chaves. "Non-intrusive Systems for Monitoring Internal Corrosion of Carbon Steel Pipes." In CORROSION 2019. NACE International, 2019. https://doi.org/10.5006/c2019-13358.

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Abstract Equipments and pipelines inspection and monitoring are important activities for safe working conditions in the oil and gas industry. Conventional techniques to manage the internal corrosion have high accuracy, but they require considerable time to consolidate results and high operational costs, including those related to environment and health safety. In contrast, there are many non-intrusive equipments (NIE) being offered by the market. However, its potentialities in meeting the requirements of Petrobras Pipeline Integrity Program, regarding the accuracy and the ability to identify c
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Gherghe, Ion, Florin Radoi, Emeric Chiuzan, and Nicolae Ianc. "CFD SIMULATION OF CARBON MONOXIDE CIRCULATION DYNAMICS IN A VENTILATION INSTALLATIONS TUBING." In 24th SGEM International Multidisciplinary Scientific GeoConference 24. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024/1.1/s03.32.

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Reducing the risk of occurrence of phenomena such as poisoning, as a result of the untimely penetration of a certain amount of toxic gases, inside a ventilation installation, is a priority, regarding the health and safety of workers, material assets and the negative influence on the environment, due to the possible problems caused by the occurrence of toxic atmospheres, formed by mixing air with toxic gases and vapors. In closed or semi-closed industrial and non-industrial buildings, effective ventilation is the primary measure to prevent toxic atmospheres. Knowing the behavior of toxic gases
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Lee, Jason S., Richard I. Ray, Edward J. Lemieux, Mario N. Tamburri, and Brenda J. Little. "An Evaluation of Carbon Steel Corrosion under Stagnant Seawater Conditions." In CORROSION 2004. NACE International, 2004. https://doi.org/10.5006/c2004-04595.

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Abstract Corrosion of 1020 carbon steel coupons in natural seawater over a six-month period was more aggressive under stagnant anaerobic conditions than stagnant aerobic conditions as measured by weight loss and instantaneous corrosion rate (polarization resistance). Under oxygenated conditions, a two-tiered oxide layer formed. The outer oxide layer was reddish-brown and contained numerous filamentous bacteria. The inner oxide was extremely tenacious and resistant to acid-cleaning. Under anaerobic conditions, a non-tenacious sulfur-rich corrosion product with enmeshed bacteria formed on carbon
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Sopanen, Jussi, Lasse Laurila, and Markus Hirvonen. "Torsion Vibration Analysis of a Cardan Shaft Driven by a Permanent Magnet Electric Motor." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84825.

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An analytical model of a double cardan shaft driveline is presented. The model has been derived by using a Lagrangian dynamics formulation and it includes description of the torsion flexibility of the shafts. The cardan shaft model is used in a coupled simulation with a direct torque controlled permanent magnet synchronous motor. Mechanical and electrical non-idealities affecting the dynamics of the driveline are studied. The modeled non-idealities include unequal joint angles, incorrect phasing of the cardan joints and current measurement errors in the supply of the electric motor. The result
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Cannon, James, and Ortwin Hess. "Non-Equilibrium Studies of Molecular Flow Through Carbon Nanotubes." In ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2008. http://dx.doi.org/10.1115/icnmm2008-62265.

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Carbon nanotubes are likely to form an integral part of future nano-fluidic devices. In order to realise such devices, an understanding of the dynamics of molecular flow through nanotubes is crucial. We have conducted continuous-flow non-equilibrium molecular dynamics simulations of argon and hydrogen flow through nanotubes, in order to decipher the fundamental driving forces behind the flow dynamics, upon which the motions of more complex molecules are based. We detail the fundamental mechanisms of flow in the nano-confined space of a carbon nanotube, and demonstrate how this knowledge can be
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Frankland, Sarah-Jane, Tozer Bandorawalla, and Thomas Gates. "Calculation of Non-bonded Forces due to Sliding of Bundled Carbon Nanotubes." In 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-1536.

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West, Stephen T., Charles White, Chris Celestino, Stuart Philpott, and Mark Pankow. "Design and Testing of Deployable Carbon Fiber Booms for CubeSat Non-Gossamer Applications." In 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-0206.

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Hussain, Adam K., John Wertz, Hilmar Koerner, Kaan Nuhoglu, and Emrah Celik. "Non-Destructive Testing of In-Situ Activated Fiber Reinforced Composites." In ASME 2025 Aerospace Structures, Structural Dynamics, and Materials Conference. American Society of Mechanical Engineers, 2025. https://doi.org/10.1115/ssdm2025-152331.

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Abstract Conductive carbon fiber-reinforced polymer (CFRP) composites with self-sensing capabilities are highly suited for electrical impedance tomography (EIT) applications. Changes in the percolated fiber network can be tracked through corresponding variations in voltage and conductivity. Recent advancements in CFRP additive manufacturing have enabled the production of in-situ electrically activated composites via direct ink writing technique. This work presents the first implementation of EIT analysis on in-situ activated and additively manufactured CFRPs. Different sets of additively manuf
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Avila, Antonio F., Viviane C. Munhoz, Aline M. Oliveira, Nathalia C. Menezes, Suchilla G. Leao, and Camila F. Silva. "Non-covalent Functionalization of CNT and Graphene and Its Application to Hybrid Carbon/Epoxy Composites." In 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. American Institute of Aeronautics and Astronautics, 2016. http://dx.doi.org/10.2514/6.2016-0154.

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de Castro, Carlos Henrique L., Paulo B. Gonçalves, and Diego Orlando. "Nonlinear Vibrations and Instability of Shallow Pyramidal Trusses." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-46039.

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Pyramidal space trusses are a basic component of several structures, from carbon nanostructures to large geodesic domes. These structures, such as the classical Von Mises truss, have a highly non-linear response in the presence of static and dynamic loads. The geometric nonlinearity is particularly significant, even at low load levels when these structures are shallow, that is, has a small height to base ratio. This paper presents an exact non-linear formulation for a shallow pyramidal truss composed of n equally spaced bars. Based on this formulation, the loss of stability and nonlinear vibra
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Reports on the topic "Non Cartan dynamics"

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Yılmaz, Fatih. Understanding the Dynamics of the Renewable Energy Transition: The Determinants and Future Projections Under Different Scenarios. King Abdullah Petroleum Studies and Research Center, 2022. http://dx.doi.org/10.30573/ks--2021-dp25.

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The global energy system’s current structure has severe environmental consequences that necessitate an urgent transformation toward more sustainable alternatives. Besides many available mitigation actions, such as enhancing energy efficiency, deploying nuclear energy, switching fuels and adopting carbon capture technologies, renewable energy (RE) has been the most widely applied one in many countries, especially for the power sector. The average country-level share of non-hydroelectric renewable energy (NhRE) in power generation rose sixfold over the last two decades, from less than 1% in 2000
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Chepeliev, Maksym, Israel Osorio Rodarte, and Dominique van der Mensbrugghe. Distributional Impacts of Carbon Pricing Policies under Paris Agreement: Inter and Intra-Regional Perspectives. GTAP Working Paper, 2021. http://dx.doi.org/10.21642/gtap.wp88.

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While bringing multiple benefits for the environment, achievement of the stringent global greenhouse gas emissions reduction target, like the one outlined in the Paris Climate Agreement, is associated with significant implementation costs and could impact different dimensions of human well-being, including welfare, poverty and distributional aspects. In this paper, we analyze the poverty and distributional impacts of different carbon pricing mechanisms consistent with reaching the Paris Agreement targets. We link a global recursive dynamic computable general equilibrium model ENVISAGE with the
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Schmidt, Mark. Dynamics and variability of POC burial in depocenters of the North Sea (Skagerrak), Cruise No. AL561, 2.08.2021 – 13.08.2021, Kiel – Kiel, APOC. GEOMAR Helmholtz Centre for Ocean Research Kiel, 2021. http://dx.doi.org/10.3289/cr_al561.

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The AL561 cruise was conducted in the framework of the project APOC (“Anthropogenic impacts on Particulate Organic Carbon cycling in the North Sea”). This collaborative project between GEOMAR, AWI, HEREON, UHH, and BUND is to understand how particulate organic carbon (POC) cycling contributes to carbon sequestration in the North Sea and how this ecosystem service is compromised and interlinked with global change and a range of human pressures include fisheries (pelagic fisheries, bottom trawling), resource extraction (sand mining), sediment management (dredging and disposal of dredged sediment
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Hinterlang, Natascha. Effects of Carbon Pricing in Germany and Spain: An Assessment with EMuSe. Banco de España, 2023. http://dx.doi.org/10.53479/33814.

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Using the dynamic, three-region environmental multi-sector general equilibrium model EMuSe, we find that pricing carbon in Germany or Spain only leads to a permanent negative effect on output in these economies. The induced emissions reduction is not large enough to overcompensate for the increase in marginal production costs. If the rest of Europe joins the carbon pricing scheme, long-run output effects are positive. However, in this case, transition costs are even larger due to close trade relations within Europe. We find evidence for carbon leakage, which can be reduced slightly by a border
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Hrehor, Troy, Timothy Jacobs, and Mark Patterson. PR457-22209-R01 Feasibility Study of the Premixing of PCC Fuel and Air to Reduce GHG Emissions. Pipeline Research Council International, Inc. (PRCI), 2025. https://doi.org/10.55274/r0000115.

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The large-bore, slow-speed, two-stroke natural gas engines that frequently power natural gas pipelines are the subjects of increasingly stringent emissions standards, particularly those targeting emissions of oxides of nitrogen (NOx) and greenhouse gases (GHGs) such as methane and carbon dioxide. Running these engines near their lean limits of operation reduces combustion temperature and therefore NOx emissions but at the cost of increased misfires and combustion instability, thus increasing GHG emissions. A pre-combustion chamber (PCC) can be equipped to provide a high-energy ignition source
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Steinbuks, Jevgenijs, and Thomas Hertel. Forest, Agriculture, and Biofuels in a Land use model with Environmental services (FABLE). GTAP Working Paper, 2012. http://dx.doi.org/10.21642/gtap.wp71.

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The goal of this paper is to introduce FABLE (Forest, Agriculture, and Biofuels in a Land use model with Environmental services), a dynamic global model, aimed at analyzing the optimal profile for global land use in the context of growing commercial demands for food and forest products, increasing non-market demands for ecosystem services, and more stringent greenhouse gas mitigation targets. The model seeks to determine the optimal allocation of scarce land across competing uses across time. FABLE integrates distinct strands of agronomic, economic and biophysical literatures into a single, in
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Bar-Tal, Asher, Paul R. Bloom, Pinchas Fine, et al. Effects of soil properties and organic residues management on C sequestration and N losses. United States Department of Agriculture, 2008. http://dx.doi.org/10.32747/2008.7587729.bard.

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Objectives - The overall objective of this proposal was to explore the effects of soil properties and management practices on C sequestration in soils and off-site losses of N.The specific objectives were: 1. to investigate and to quantify the effects of soil properties on C transformations that follow OW decomposition, C losses by gaseous emission, and its sequestration by organic and mineral components of the soil; 2. to investigate and to quantify the effects of soil properties on organic N mineralization and transformations in soil, its losses by leaching and gaseous emission; 3. to invest
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Strambo, Claudia, Patricio Calles Almeida, and Elisa Arond. Energy transition ambitions of four national oil and gas companies in South America. Stockholm Environment Institute, 2023. http://dx.doi.org/10.51414/sei2023.059.

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This report explores what (if any) diversification strategies national oil and gas companies (NOGCs) are employing to engage in an energy transition, with a focus on four South American countries: Argentina, Brazil, Colombia and Ecuador.The authors identify how four South American NOGCs are preparing to transform in the face of climate change and the energy transition. They do so by looking at these companies’ publicly stated ambitions regarding diversification: they focus in particular on whether and how these companies are leaving fossil fuels behind, as a sign of transforming their core bus
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Taucher, Jan, and Markus Schartau. Report on parameterizing seasonal response patterns in primary- and net community production to ocean alkalinization. OceanNETs, 2021. http://dx.doi.org/10.3289/oceannets_d5.2.

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We applied a 1-D plankton ecosystem-biogeochemical model to assess the impacts of ocean alkalinity enhancement (OAE) on seasonal changes in biogeochemistry and plankton dynamics. Depending on deployment scenarios, OAE should theoretically have variable effects on pH and seawater pCO2, which might in turn affect (a) plankton growth conditions and (b) the efficiency of carbon dioxide removal (CDR) via OAE. Thus, a major focus of our work is how different magnitudes and temporal frequencies of OAE might affect seasonal response patterns of net primary productivity (NPP), ecosystem functioning and
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Taucher, Jan, and Markus Schartau. Report on parameterizing seasonal response patterns in primary- and net community production to ocean alkalinization. OceanNETs, 2021. http://dx.doi.org/10.3289/oceannets_d5.3.

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We applied a 1-D plankton ecosystem-biogeochemical model to assess the impacts of ocean alkalinity enhancement (OAE) on seasonal changes in biogeochemistry and plankton dynamics. Depending on deployment scenarios, OAE should theoretically have variable effects on pH and seawater pCO2, which might in turn affect (a) plankton growth conditions and (b) the efficiency of carbon dioxide removal (CDR) via OAE. Thus, a major focus of our work is how different magnitudes and temporal frequencies of OAE might affect seasonal response patterns of net primary productivity (NPP), ecosystem functioning and
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