113,387 research outputs found
The Sakai-Sugimoto soliton
No full textThe Sakai-Sugimoto model is the preeminent example of a string theory description of holographic QCD, in which baryons correspond to topological solitons in the bulk. Here we investigate the validity of various approximations of the Sakai-Sugimoto soliton that are used widely to study the properties of holographic baryons. These approximations include the flat space self-dual instanton, a linear expansion in terms of eigenfunctions in the holographic direction and an asymptotic power series at large radius. These different approaches have produced contradictory results in the literature regarding properties of the baryon, such as relations for the electromagnetic form factors. Here we determine the regions of validity of these various approximations and show how to relate different approximations in contiguous regions of applicability. This analysis clarifies the source of the contradictory results in the literature and resolves some outstanding issues, including the use of the flat space self-dual instanton, the detailed properties of the asymptotic soliton tail, and the role of the UV cutoff introduced in previous investigations. A consequence of our analysis is the discovery of a new large scale, that grows logarithmically with the 't Hooft coupling, at which the soliton fields enter a nonlinear regime. Finally, we provide the first numerical computation of the Sakai-Sugimoto soliton and demonstrate that the numerical results support our analysis. © 2014 The Author(s)
Wolffogebia phuketensis Sakai 1982
No full text<i>Wolffogebia phuketensis</i> Sakai, 1982 <p>(Fig. 1i, j)</p> <p> <i>Wolffogebia phuketensis</i> Sakai, 1982: 75, figs. 17a, 18c, d, 20b; — Ngoc-Ho, 1994: 213, fig. 12; — Ngoc-Ho et al., 2001: 108; — Sakai & Türkay, 2014: 157.</p> <p> <b>CMBS material.</b> 1 male (15/4.6) (ZRC 2018.0546), sta. SW126, Sungei Buloh, 1°27.064′N 103°43.319′E, mangrove, in mud, beach seine and hand nets, intertidal (low tide), coll. KS Koh, YL Lee et al., 30 October 2012 (JS-2695); 1 male (37/10.3) (NHMW 26036), sta. SW137, Pulau Ubin, OBS Camp 1, 1°25′15.77″N 103°55′57.00″E, near brackish stream in secondary forest, low tide, coll. R Lasley, JC Mendoza, 31 October 2012 (JS-3001).</p> <p> <b>Description.</b> See Sakai (1982) and Ngoc-Ho (1994).</p> <p> <b>Distribution.</b> Phuket, Thailand (Sakai, 1982, type locality); Can Gio, Vietnam (Marin, 2021); Singapore (Ngoc-Ho, 1994); Sumatra, Indonesia (Sakai & Türkay, 2014).</p> <p> <b>Habitat.</b> Intertidal, in thick mangrove mud (Ngoc-Ho, 1994; Marin, 2021; this study).</p>Published as part of <i>Dworschak, Peter C. & Anker, Arthur, 2022, Axiidea (Crustacea: Callianassidae, Callichiridae and Ctenochelidae) and Gebiidea (Upogebiidae) collected during the Comprehensive Marine Biodiversity Survey of Singapore, pp. 108-133 in Raffles Bulletin of Zoology 70</i> on page 130, DOI: 10.26107/RBZ-2022-0008, <a href="http://zenodo.org/record/7175098">http://zenodo.org/record/7175098</a>
Numerical Diagonalization Study on Frustrated Quantum Spin Systems
No full textFrustrated quantum spin systems are investigated by the large-scale numerical exact diagonalization based on the Lanczos algorithm. Our recent results based on the calculation for finite-size clusters up to 45 spins are introduced about the following topics;
(1) spin gap issue of the kagome-lattice antiferromagnet[1.2],
(2) magnetization plateaux of the triangular- and kagome-lattice antiferromagnets[3,4].
(3) quatnum phase transitions of the Shastry-Sutherland model[5].
References
[1]H. Nakano and T. Sakai, J. Phys. Soc. Jpn. 80 (2011)053704;arXiv:1103.5829
[2]T. Sakai and H. Nakano, Physica B 536 (2018)85; arXiv:1801.04458
[3]H. Nakano and T. Sakai, J. Phys. Soc. Jpn. 87 (2018)063706.
[4]H. Nakano and T. Sakai, J. Phys. Soc. Jpn. 86 (2017)114705;arXiv:1708.07248.
[5]H. Nakano and T. Sakai, J. Phys. Soc. Jpn. 87 (2018) 123702; arXiv: 1810.11533.Frontiers of Statistical Physocsconference objec
Sejarah Perkembangan Bahasa Sakai
No full textBerdasarkan rekonstruksi yang dilakukan terhadap kata-kata kognat antara bahasa Sakai dengan Proto Malayik (PM), dapat diketahui bahwa bahasa Sakai mengalami perkembangan sebagai berikut. (1) Unsur fonologis PM yang mengalami retensi adalah: vokal *a, *i, *u; diftong *aw dan *ay; konsonan: *p, *b, *t, *d, *c, *k, *g, *j, *h, *m, *n, *?, *ñ, *s, *l, *w, dan *y. (2) Inovasi primer yang terjadi pada vokal adalah substitusi, split, dan merger. Inovasi primer yang berupa substitusi antara lain: (a) *a >?, (b) *?>?, (c) *?> a, (d) *i > e; dan (e) *u >?; split antara lain: (a) *u >i dan ui dan (b) *i >i, e, dan a; dan merger adalah *?, *i > e. (3) Inovasi primer yang terjadi pada konsonan antara lain: (a) *h > ø; (b) *r > ø; (c) *s > h; (d) split PM *b >b dan w; (e) merger PM *p, *t, dan *k >?. (4) Unsur fonologis PM yang mengalami inovasi sekunder dalam bahasa Sakai antara lain: *aw *d, *n, *?,*ñ, *l, *r, *w, dan *d ? l
Relation between enstrophy production and geometry near the turbulent/non-turbulent interface in free shear flows
No full textIn many free shear flows, such as mixing layers, wakes and jets exhibit a sharp turbulent/non-turbulent interface (TNTI) separating regions of turbulent and non-turbulent or potential flow. In the present work the dependence of enstrophy production on the interface geometry near the TNTI is investigated by using direct numerical simulations (DNS) of a shear free turbulence (SFT) and a temporally developing planar jet (PJET). It is shown that the geometry of the TNTI has impacts on the mechanism governing enstrophy dynamics within the interface layer itself. In particular it is shown that enstrophy production within the turbulent sublayer is primarily associated with a convex shape of the interface both the SFT and PJET
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
Using the Sakai Collaborative Toolkit in e-Research Applications
No full textThe Sakai Project ( http://www.sakaiproject.org ) is developing a collaborative environment that provides capabilities that span teaching and learning as well as e-Research applications. By exploiting the significant requirements overlap in the collaboration space between these areas, the Sakai community can harness significant resources to develop an increasingly rich set of collaborative tools. While collaboration is a significant element of many e-Research projects, there are many other important elements including portals, data repositories, compute resources, special software, data sources, desktop applications, and content management/e-Publication. The successful e-Research projects will find ways to harness all of these elements to advance their science in the most effective manner. It is critical to realize that there is not a single software product that can meet the requirements for such a rich e-Research effort. Realizing that multiple elements must be integrated together for best effect leads us to focus on understanding the nature of integration and working together to improve the cross-application integration. This leads us not to drive towards a single toolkit (such as Sakai or Globus), but instead to a meta-toolkit containing well-integrated applications. When considering a technology for use, perhaps the most important aspect of that technology is how well it integrates with other technologies. Copyright © 2007 John Wiley & Sons, Ltd.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/56162/1/1115_ftp.pd
3D crystal plasticity analyses on the role of hard/soft inclusions in the local slip formation
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