Готові списки джерел за темами / Skymion

Добірка наукової літератури з теми "Skymion"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "Skymion"

1

ZUK, JOSEF A. "ASYMPTOTIC BEHAVIOUR OF THE VACUUM ENERGY FOR SMALL SKYRMIONS." International Journal of Modern Physics A 05, no. 18 (September 20, 1990): 3549–97. http://dx.doi.org/10.1142/s0217751x90001549.

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Various schemes for deriving effective Lagrangians, involving both quark and meson degrees of freedom, which are intermediate between QCD and low-energy pion dynamics have been proposed. While integration over the fermion fields within the framework of renormalized field theory leads to a vacuum instability, physically reasonable results are obtained for the theory taken with finite cut-off. In principle, properties of the nucleon, such as its mass, can be obtained from a self-consistent calculation in the Skyrmion sector. This procedure can be simplified by implementing an analytical approximation for the fermion vacuum energy which plays a central role. We discuss such an approximation, and use it to calculate exactly the asymptotic behaviour of the vacuum energy for small Skyrmions. It is found that, unlike in the renormalized theory, its functional dependence on the Skymion radius in this limit depends on the characteristics of the Skyrmion profile and choice of regularization scheme; however, the cut-off field theory exhibits no vacuum instability.
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2

KİLECİ, Şenkal. "Anonymus, (Khioslu Skymnos a Ait Olduğu Söylenen) Anonymus Periegesis." LIBRI Kitap Tanitimi, Elestiri ve Ceviri Dergisi, no. 3 (April 12, 2017): 56–127. http://dx.doi.org/10.20480/lbr.2017010.

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3

Hou Zhi-Peng, Ding Bei, Li Hang, Xu Gui-Zhou, Wang Wen-Hong, and Wu Guang-Heng. "Observation of new-type magnetic skymrions with extremerely high temperature stability and fabrication of skyrmion-based race-track memory device." Acta Physica Sinica 67, no. 13 (2018): 137509. http://dx.doi.org/10.7498/aps.67.20180419.

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4

Riedel, Jon L., John J. Clague, and Brent C. Ward. "Timing and extent of early marine oxygen isotope stage 2 alpine glaciation in Skagit Valley, Washington." Quaternary Research 73, no. 2 (March 2010): 313–23. http://dx.doi.org/10.1016/j.yqres.2009.10.004.

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Twenty-two new radiocarbon ages from Skagit valley provide a detailed chronology of alpine glaciation during the Evans Creek stade of the Fraser Glaciation (early marine oxygen isotope stage (MIS) 2) in the Cascade Range, Washington State. Sediments at sites near Concrete, Washington, record two advances of the Baker valley glacier between ca. 30.3 and 19.5 cal ka BP, with an intervening period of glacier recession about 24.9 cal ka BP. The Baker valley glacier dammed lower Skagit valley, creating glacial Lake Concrete, which discharged around the ice dam along Finney Creek, or south into the Sauk valley. Sediments along the shores of Ross Lake in upper Skagit valley accumulated in glacial Lake Skymo after ca. 28.7 cal ka BP behind a glacier flowing out of Big Beaver valley. Horizontally laminated silt and bedded sand and gravel up to 20 m thick record as much as 8000 yr of deposition in these glacially dammed lakes. The data indicate that alpine glaciers in Skagit valley were far less extensive than previously thought. Alpine glaciers remained in advanced positions for much of the Evans Creek stade, which may have ended as early as 20.8 cal ka BP.
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5

Whitney, D. L., J. H. Tepper, M. M. Hirschmann, and H. A. Hurlow. "Late orogenic mafic magmatism in the North Cascades, Washington: Petrology and tectonic setting of the Skymo layered intrusion." Geological Society of America Bulletin 120, no. 5-6 (April 30, 2008): 531–42. http://dx.doi.org/10.1130/b26096.1.

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6

Riedel, Jon L., Alice Telka, Andy Bunn, and John J. Clague. "Reconstruction of climate and ecology of Skagit Valley, Washington, from 27.7 to 19.8 ka based on plant and beetle macrofossils." Quaternary Research 106 (October 27, 2021): 94–112. http://dx.doi.org/10.1017/qua.2021.50.

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AbstractGlacial lake sediments exposed at two sites in Skagit Valley, Washington, encase abundant macrofossils dating from 27.7 to 19.8 cal ka BP. At the last glacial maximum (LGM) most of the valley floor was part of a regionally extensive arid boreal (subalpine) forest that periodically included montane and temperate trees and open boreal species such as dwarf birch, northern spikemoss, and heath. We used the modern distribution and climate of 14 species in 12 macrofossil assemblages and a probability density function approach to reconstruct the LGM climate. Median annual precipitation (MAP) at glacial Lake Concrete (GLC) was ~50% lower than today. In comparison, MAP at glacial Lake Skymo (GLS) was only ~10% lower, which eliminated the steep climate gradient observed today. Median January air temperature at GLC was up to 10.8°C lower than today at 23.5 cal ka BP and 8.7°C lower at GLS at 25.1 cal ka BP. Median July air temperature declines were smaller at GLC (3.4°C–5.0°C) and GLS (4.2°C–6.3°C). Warmer winters (+2°C to +4°C) and increases in MAP (+200 mm) occurred at 27.7, 25.9, 24.4, and 21.2–20.7 cal ka BP. These changes accord with other regional proxies and Dansgaard–Oeschger interstades in the North Atlantic.
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7

SHIPLEY, GRAHAM. "(D.) Marcotte (ed.) Géographes grecs. Tome I, Introduction générale; Ps.-Scymnos: Circuit de la terre. (Collection des Universités de France publiée sous le patronage de l'Association Guillaume Budé.) Pp. clxviii + 310, maps. Paris: Les Belles Lettres, 2000. €58. ISBN: 978-2-251-00487-7.(M.) Korenjak (ed.) Die Welt-Rundreise eines anonymen griechischen Autors (‘Pseudo-Skymnos') (Bibliotheca Weidmanniana, 8). Pp. 117, map. Hildesheim: Weidmann, 2003. €19.80. ISBN: 978-3-487-11847-5.(K.) Boshnakov Pseudo-Skymnos (Semos von Delos?). Τα αριστερα του Ποντου. Zeugnisse griechischer Schriftsteller über den westlichen Pontosraum. (Palingenesia 82.) Pp. x + 268, ills, map. Stuttgart: Franz Steiner Verlag, 2004. Cased, €48. ISBN: 978-3-515-08393-5." Classical Review 57, № 2 (3 вересня 2007): 348–54. http://dx.doi.org/10.1017/s0009840x07000431.

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8

KORENJAK, MARTIN. "TEXTKRITISCHE UND INTERPRETATORISCHE BEMERKUNGEN ZU PSEUDO-SKYMNOS." Philologus 147, no. 2 (January 1, 2003). http://dx.doi.org/10.1524/phil.2003.147.2.226.

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9

Kent, Noah, Neal Reynolds, David Raftrey, Ian T. G. Campbell, Selven Virasawmy, Scott Dhuey, Rajesh V. Chopdekar, et al. "Creation and observation of Hopfions in magnetic multilayer systems." Nature Communications 12, no. 1 (March 10, 2021). http://dx.doi.org/10.1038/s41467-021-21846-5.

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AbstractAmong topological solitons, magnetic skyrmions are two-dimensional particle-like objects with a continuous winding of the magnetization, and magnetic Hopfions are three-dimensional objects that can be formed from a closed loop of twisted skyrmion strings. Theoretical models suggest that magnetic Hopfions can be stabilized in frustrated or chiral magnetic systems, and target skymions can be transformed into Hopfions by adapting their perpendicular magnetic anisotropy, but their experimental verification has been elusive so far. Here, we present an experimental study of magnetic Hopfions that are created in Ir/Co/Pt multilayers shaped into nanoscale disks, known to host target skyrmions. To characterize three-dimensional spin textures that distinguish Hopfions from target skyrmions magnetic images are recorded with surface-sensitive X-ray photoemission electron microscopy and bulk-sensitive soft X-ray transmission microscopy using element-specific X-ray magnetic circular dichroism effects as magnetic contrast. These results could stimulate further investigations of Hopfions and their potential application in three-dimensional spintronics devices.
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Дисертації з теми "Skymion"

1

Beaudoin, Marc-Olivier. "Skymions q-BPS: facteurs de forme électromagnétiques." Thesis, Université Laval, 2014. http://www.theses.ulaval.ca/2014/30472/30472.pdf.

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La recherche d’une théorie décrivant les états de hadrons à basse énergie est primordial pour la compréhension complète de la chromodynamique quantique. Dans ce domaine, les théories de Skyrme sont encore reconnues comme d’excellentes candidates. Existant depuis plus de soixante ans, plusieurs extensions ont été proposées et une d’entre elles fera l’objet de ce mémoire : l’extension quasi-BPS (Bogomol’nyi-Prasad-Sommerfield). L’énergie classique des configurations de ce modèle BPS est près de saturer une certaine borne qui assure que les états de la théorie ne seront presque pas liés, ce qui se rapproche grandement de l’observation expérimentale. La possibilité de réintroduire une énergie de liaison par l’ajout de perturbations ainsi que diverses contributions énergétiques ressortant de la quantification des états sera examinée. Nous verrons que cette approche est prometteuse, puisqu’elle permet d’obtenir des prédictions convaincantes sur la majorité des caractéristiques des noyaux atomiques.
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2

Beaudoin, Marc-Olivier. "Skymions q-BPS : facteurs de forme électromagnétiques." Master's thesis, Université Laval, 2013. http://hdl.handle.net/20.500.11794/24867.

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Анотація:
La recherche d’une théorie décrivant les états de hadrons à basse énergie est primordial pour la compréhension complète de la chromodynamique quantique. Dans ce domaine, les théories de Skyrme sont encore reconnues comme d’excellentes candidates. Existant depuis plus de soixante ans, plusieurs extensions ont été proposées et une d’entre elles fera l’objet de ce mémoire : l’extension quasi-BPS (Bogomol’nyi-Prasad-Sommerfield). L’énergie classique des configurations de ce modèle BPS est près de saturer une certaine borne qui assure que les états de la théorie ne seront presque pas liés, ce qui se rapproche grandement de l’observation expérimentale. La possibilité de réintroduire une énergie de liaison par l’ajout de perturbations ainsi que diverses contributions énergétiques ressortant de la quantification des états sera examinée. Nous verrons que cette approche est prometteuse, puisqu’elle permet d’obtenir des prédictions convaincantes sur la majorité des caractéristiques des noyaux atomiques.
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3

Wilson, Brendan John. "Studies in the theory of multiband superconductors." Phd thesis, 2015. http://hdl.handle.net/1885/13821.

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While the theory of multiband superconductivity has existed since the work of Suhl et al. and Moskalenko, it has only been with the discovery of superconductivity in magnesium diboride that this theory could be applied to real materials. The list of possible multiband superconductors has steadily grown, and these materials have attractive properties that warrant further investigation. In this thesis we look at two theories of multiband superconductivity and the connection between them. The first theory is the multiband generalisation of the microscopic theory of Bardeen, Cooper and Schrieffer (BCS). In the case of three superconducting bands, it is well known that there can exist a phase transition to a new phase of superconductivity, the time-reversal-symmetry-broken (TRSB) state. We show that in this state the full multiband theory reduces exactly to solving a set of independent one-band equations. In addition, this reduction produces a set of conditions among these one-band solutions which must be satisfied for them to be solutions of the full multiband equations. These conditions can therefore be used to find the TRSB transition temperature. The phenomenological Ginzburg-Landau theory (GL), which can be derived as an expansion of BCS theory around the critical temperature, has also had a multiband generalisation which was first derived by Tilley. Peeter’s and co-workers recently used the Gor’kov technique to find the next order corrections to the theory, extending the validity to slightly lower temperatures. We restrict ourselves to the field-free case and find extensions to very high order. We show that in the one-band theory and most multiband cases the superconducting gap in this extended GL theory converges to the BCS theory over almost the entire temperature range. However there are some cases in the multiband theory where the GL expansion diverges. This divergence is related to the appearance of a second critical temperature in the uncoupled limit. Finally we apply a range of numerical methods to find vortex and skyrmion states in multiband superconductors. The skyrmion states are variations of the well-known vortex states, and only appear when the bulk superconductor is in the TRSB state. We find that, with the bulk in the TRSB state, the low order skyrmion solutions are very robust and are very likely to evolve from a random initial configuration. However the higher order skyrmion states are instead likely to form a collection of lower order skyrmions and vortices, and a large amount of control is required to form them.
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Книги з теми "Skymion"

1

Pseudo-Skymnos (Semos von Delos?): Ta aristera tou Pontou : Zeugnisse griechischer Schriftsteller über den westlichen Pontosraum. Stuttgart: Steiner, 2004.

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2

La Chronique d'Apollodore et le Pseudo-Skymnos: Érudition antiquaire et littérature géographique dans la seconde moitié du IIe siècle av. J.-C. Leuven: Peeters, 2009.

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3

Bravo, Benedetto. La Chronique d'Apollodore et le Pseudo-Skymnos: Érudition antiquaire et littérature géographique dans la seconde moitié du IIe siècle av. J.-C. Leuven: Peeters, 2009.

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4

M, M. Skymoon: Le Lame Perdute. Independently Published, 2019.

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5

Karalis, Mickey D. Skymoon: Le Lame Perdute. Independently Published, 2020.

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6

Boshnakov, Konstantin. Pseudo-Skymnos (Semos von Delos?). Franz Steiner Verlag, 2019. http://dx.doi.org/10.25162/9783515122955.

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7

Pia and the Skyman. Odyssey Books, 2016.

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8

artist, Garcia Manuel (Cartoonist), Martínez Marta artist, BIT artist, and Piekos Nate letterer, eds. Skyman: The right stuff. 2014.

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9

Forrester, Larry. Skymen: Heroes Of Fifty Years Of Flying. Kessinger Publishing, LLC, 2007.

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10

Korenjak, Martin. Welt-rundreise Eines Anonymen Griechischen Autors,die ("pseudo-skymnos"). Olms George, 2003.

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Частини книг з теми "Skymion"

1

Yan, Lu, Moisés Ferrer Serra, Guangcheng Niu, Xinrong Zhou, and Kaisa Sere. "SkyMin: A Massive Peer-to-Peer Storage System." In Lecture Notes in Computer Science, 527–34. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-30208-7_72.

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Тези доповідей конференцій з теми "Skymion"

1

Angelo, David St, Mark Clayton, Phil Higgs, Joe Jones, Jack Lynch, and Stacy MacDiarmid. "CO2 Capture in Solid Form - An Overview of the SkyMine- Process." In 2008 IEEE Energy 2030 Conference. IEEE, 2008. http://dx.doi.org/10.1109/energy.2008.4780987.

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Звіти організацій з теми "Skymion"

1

Joe Jones, Clive Barton, Mark Clayton, Al Yablonsky, and David Legere. SkyMine Carbon Mineralization Pilot Project. Office of Scientific and Technical Information (OSTI), September 2010. http://dx.doi.org/10.2172/1027801.

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2

Walters, Jerel. SkyMine Beneficial CO2 Use Project. Office of Scientific and Technical Information (OSTI), February 2016. http://dx.doi.org/10.2172/1241314.

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