This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The publication of this article was funded by SCOAP 3 .
1. Introduction
As the most beautiful and simplest theory of gravity, Einstein’s general relativity (GR) admits the covariant conservation of matter energy-momentum tensor. It is worthy to point out that the idea of the covariant conservation for spacetime symmetries has been implemented only in the Minkowski flat or weak field regime of gravity. Nevertheless, the actual nature of the spacetime geometry and the covariant conservation relation is still debated in the strong domain of gravity. In 1972, Rastall [1] demonstrated an adjustment to Einstein’s equation, which results in a violation of the usual conservation law, and the energy-momentum tensor satisfies
Recently, the study of thermodynamics of AdS black holes has been generalized to the extended phase space, where the cosmological constant is related to the thermodynamic pressure [20, 21].
In fact, the variation of the cosmological constant is beneficial to the consistency between the first law of black hole thermodynamics and the Smarr formula. In the extended phase space, the charged AdS black hole admits a more direct and precise coincidence between the first-order small/large black hole (SBH/LBH) phase transition and Van der Waals (VdW) liquid-gas phase transition, and both systems share the same critical exponents near the critical point [22]. More discussions in this direction can be found as well in including reentrant phase transitions and some other phase transitions [23–51].
On the other hand, in the context of the AdS/CFT correspondence, the QNMs of a
This paper is organized as follows. In Section 2, we review the thermodynamics of four-dimensional AdS black holes in the extended phase space and will show the analogy of the SBH/LBH phase transition with the VdW liquid-gas system. In Section 3, we will disclose that the phase transition can be reflected by the QNM frequencies of dynamical perturbations. We end the paper with conclusions and discussions in Section 4.
2. Thermodynamics and Phase Transition of AdS Black Holes
Considering (1), the field equation including the negative cosmological constant
In four-dimensional spacetime, the energy-momentum tensor
Then, the AdS black hole solution in four-dimensional Rastall theory is [17]
Moreover, the integration constant
Regarding the weak energy condition representing the positivity of any kind of energy density of the surrounding field, i.e.,
In the limit of
In terms of horizon radius
In the extended phase space, the cosmological constant is related to the thermodynamic pressure with
As usual, a critical point occurs when
The corresponding critical values are obtained as
The subscript “
Table 1
The positive values of critical points in the case of
None | |||
For instance, we plot the
[figures omitted; refer to PDF]
The behavior of the Gibbs free energy
Here,
3. Perturbations of AdS Black Holes in Rastall Gravity
Now, we study a massless scalar field perturbation on the four-dimensional AdS black holes surrounded by perfect fluid. The test scalar field satisfies the Klein-Gordon equation:
Assuming the scalar field with
At the AdS boundary
Near the horizon
In the limit of
It is worthy to point out that without surrounding perfect fluid (
[figures omitted; refer to PDF]
By choosing the pressure
On the other hand, the QNM frequencies of massless scalar perturbation against the small and large black holes are shown in Table 2. For the small black hole phase
Table 2
The QNM frequencies of (a) (
(a)
0.1250 | 0.275 | 1.66875-0.02303I |
0.1270 | 0.280 | 1.66643-0.02462I |
0.1288 | 0.285 | 1.66407-0.02629I |
0.1304 | 0.290 | 1.66167-0.02804I |
0.1311 | 1.245 | 1.97363-0.78752I |
0.1312 | 1.250 | 1.97610-0.78863I |
0.1313 | 1.255 | 1.97859-0.78974I |
0.1314 | 1.260 | 1.98110-0.79083I |
(b)
0.040759 | 1.700 | 1.15336-0.219889I |
0.041069 | 1.750 | 1.14943-0.221412I |
0.041308 | 1.800 | 1.14140-0.223724I |
0.041488 | 1.850 | 1.13570-0.224786I |
0.041634 | 3.3525 | 1.93148-0.263925I |
0.041636 | 3.3550 | 1.93191-0.263982I |
0.041638 | 3.3575 | 1.93236-0.264036I |
0.041640 | 3.3600 | 1.93281-0.264086I |
In addition, the mass
In the limit
In other words, the quasinormal modes of small Schwarzschild AdS black holes (
Evidently, the mass of AdS black hole is divergent in the limit
In addition, at the critical position
[figures omitted; refer to PDF]
4. Concluding Remarks
In the four-dimensional Rastall theory, we reviewed the
Nevertheless, this phenomenon does not appear at the critical isobaric phase transitions, where the QNM frequencies for both small and large black holes share the same behavior. This implies that the QNM frequencies are not suitable to probe the black hole phase transition in the second order.
In four-dimensional Rastall gravity, charged Kiselev-like black holes surrounded by perfect fluid have been obtained by Heydarzade and Darabi [9]. It would be interesting to derive charged AdS black hole solutions in the Rastall gravity. Then, we can recover the possible relation between the thermodynamical phase transition and QNM frequencies. Similar discussions for the charged AdS black holes in the Rastall gravity coupled with a nonlinear electric field also deserve a new work in the future.
Acknowledgments
This work is supported by the National Natural Science Foundation of China under Grant Nos. 11605152, 11675139, and 51802247 and the Natural Science Foundation of Jiangsu Province (Grant No. BK20160452)
[1] P. Rastall, "Generalization of the Einstein theory," Physical Review D, vol. 6 no. 12, pp. 3357-3359, DOI: 10.1103/PhysRevD.6.3357, 1972.
[2] H. Moradpour, Y. Heydarzade, F. Darabi, I. G. Salako, "A generalization to the Rastall theory and cosmic eras," European Physical Journal C: Particles and Fields, vol. 77 no. 4,DOI: 10.1140/epjc/s10052-017-4811-z, 2017.
[3] H. Moradpour, "Thermodynamics of flat FLRW universe in Rastall theory," Physics Letters B, vol. 757, pp. 187-191, DOI: 10.1016/j.physletb.2016.03.072, 2016.
[4] I. G. Salako, M. J. S. Houndjo, A. Jawad, "Generalized Mattig’s relation in Brans–Dicke–Rastall gravity," International Journal of Modern Physics D, vol. 25 no. 7, article 1650076,DOI: 10.1142/S0218271816500760, 2016.
[5] C. E. M. Batista, J. C. Fabris, O. F. Piattella, A. M. Velasquez-Toribio, "Observational constraints on Rastall’s cosmology," The European Physical Journal C, vol. 73 no. 5, article 2425,DOI: 10.1140/epjc/s10052-013-2425-7, 2013.
[6] Y. Heydarzade, H. Moradpour, F. Darabi, "Black hole solutions in Rastall theory," Canadian Journal of Physics, vol. 95 no. 12, pp. 1253-1256, DOI: 10.1139/cjp-2017-0254, 2017.
[7] K. Lin, W. L. Qian, "Neutral regular black hole solution in generalized Rastall gravity," Chinese Physics C, vol. 43 no. 8, article 083106,DOI: 10.1088/1674-1137/43/8/083106, 2019.
[8] S. Chen, B. Wang, R. Su, "Hawking radiation in ad-dimensional static spherically symmetric black hole surrounded by quintessence," Physical Review D, vol. 77 no. 12, article 124011,DOI: 10.1103/PhysRevD.77.124011, 2008.
[9] Y. Heydarzade, F. Darabi, "Black hole solutions surrounded by perfect fluid in Rastall theory," Physics Letters B, vol. 771, pp. 365-373, DOI: 10.1016/j.physletb.2017.05.064, 2017.
[10] K. Lin, Y. Liu, W. L. Qian, "Higher dimensional power-Maxwell charged black holes in Einstein and Rastall gravity," General Relativity and Gravitation, vol. 51 no. 5,DOI: 10.1007/s10714-019-2548-8, 2019.
[11] R. Kumar, S. G. Ghosh, "Rotating black hole in Rastall theory," The European Physical Journal C, vol. 78 no. 9,DOI: 10.1140/epjc/s10052-018-6206-1, 2018.
[12] Z. Xu, J. Wang, "Kerr-Newman-AdS black hole surrounded by scalar field matter in Rastall gravity," . https://arxiv.org/abs/1711.04542
[13] H. Moradpour, I. G. Salako, "Thermodynamic analysis of the static spherically symmetric field equations in Rastall theory," Advances in High Energy Physics, vol. 2016,DOI: 10.1155/2016/3492796, 2016.
[14] M. Cruz, S. Lepe, G. Morales-Navarrete, "A thermodynamics revision of Rastall gravity," . https://arxiv.org/abs/1904.11945
[15] I. P. Lobo, H. Moradpour, J. P. Morais Graca, I. G. Salako, "Thermodynamics of black holes in Rastall gravity," International Journal of Modern Physics D, vol. 27 no. 7, article 1850069,DOI: 10.1142/S0218271818500694, 2018.
[16] K. Bamba, A. Jawad, S. Rafique, H. Moradpour, "Thermodynamics in Rastall gravity with entropy corrections," The European Physical Journal C, vol. 78 no. 12,DOI: 10.1140/epjc/s10052-018-6446-0, 2018.
[17] M. S. Ali, "Ehrenfest scheme for P - V criticality of the d -dimensional-AdS black holes surrounded by perfect fluid in Rastall theory," . https://arxiv.org/abs/1901.04318
[18] J. P. Morais Graca, I. P. Lobo, "Scalar QNMs for higher dimensional black holes surrounded by quintessence in Rastall gravity," The European Physical Journal C, vol. 78 no. 2,DOI: 10.1140/epjc/s10052-018-5598-2, 2018.
[19] J. Liang, "Quasinormal modes of the Schwarzschild black hole surrounded by the quintessence field in Rastall gravity," Communications in Theoretical Physics, vol. 70 no. 6,DOI: 10.1088/0253-6102/70/6/695, 2018.
[20] B. P. Dolan, "Pressure and volume in the first law of black hole thermodynamics," Classical and Quantum Gravity, vol. 28 no. 23, article 235017,DOI: 10.1088/0264-9381/28/23/235017, 2011.
[21] B. P. Dolan, "The cosmological constant and black-hole thermodynamic potentials," Classical and Quantum Gravity, vol. 28 no. 12, article 125020,DOI: 10.1088/0264-9381/28/12/125020, 2011.
[22] D. Kubiznak, R. B. Mann, "P − V criticality of charged AdS black holes," Journal of High Energy Physics, vol. 2012,DOI: 10.1007/jhep07(2012)033, 2012.
[23] M. Chabab, H. El Moumni, S. Iraoui, K. Masmar, "Phase transitions and geothermodynamics of black holes in dRGT massive gravity," The European Physical Journal C, vol. 79 no. 4,DOI: 10.1140/epjc/s10052-019-6850-0, 2019.
[24] K. Bhattacharya, B. R. Majhi, "Thermogeometric study of van der Waals like phase transition in black holes: an alternative approach," . https://arxiv.org/abs/1903.10370
[25] A. Haldar, R. Biswas, "Geometrothermodynamic analysis and P–V criticality of higher dimensional charged Gauss–Bonnet black holes with first order entropy correction," General Relativity and Gravitation, vol. 51 no. 2,DOI: 10.1007/s10714-019-2520-7, 2019.
[26] H. Yazdikarimi, A. Sheykhi, Z. Dayyani, "Critical behavior of Gauss-Bonnet black holes via an alternative phase space," . https://arxiv.org/abs/1903.09020
[27] W. Xu, C. Y. Wang, B. Zhu, "Effects of Gauss-Bonnet term on the phase transition of a Reissner-Nordström-AdS black hole in ( 3+1 ) dimensions," Physical Review D, vol. 99 no. 4, article 044010,DOI: 10.1103/PhysRevD.99.044010, 2019.
[28] Y. P. Hu, H. A. Zeng, Z. M. Jiang, H. Zhang, "P-V criticality in the extended phase space of black holes in Einstein-Horndeski gravity," . https://arxiv.org/abs/1812.09938
[29] A. Dehyadegari, B. R. Majhi, A. Sheykhi, A. Montakhab, "Universality class of alternative phase space and Van der Waals criticality," Physics Letters B, vol. 791, pp. 30-35, DOI: 10.1016/j.physletb.2019.02.026, 2019.
[30] M. Jamil, B. Pourhassan, A. Övgün, İ. Sakallı, "PV criticality of Achucarro-Ortiz black hole in the presence of higher order quantum and GUP corrections," . https://arxiv.org/abs/1811.02193
[31] S. Gunasekaran, R. B. Mann, D. Kubiznak, "Extended phase space thermodynamics for charged and rotating black holes and Born-Infeld vacuum polarization," Journal of High Energy Physics, vol. 1211,DOI: 10.1007/JHEP11(2012)110, 2012.
[32] S. H. Hendi, M. H. Vahidinia, "Extended phase space thermodynamics and P−V criticality of black holes with a nonlinear source," Physical Review D, vol. 88 no. 8, article 084045,DOI: 10.1103/PhysRevD.88.084045, 2013.
[33] R. Zhao, H.-H. Zhao, M.-S. Ma, L.-C. Zhang, "On the critical phenomena and thermodynamics of charged topological dilaton AdS black holes," The European Physical Journal C, vol. 73 no. 12, article 2645,DOI: 10.1140/epjc/s10052-013-2645-x, 2013.
[34] D. C. Zou, S. J. Zhang, B. Wang, "Critical behavior of Born-Infeld AdS black holes in the extended phase space thermodynamics," Physical Review D, vol. 89 no. 4, article 044002,DOI: 10.1103/PhysRevD.89.044002, 2014.
[35] D. C. Zou, Y. Liu, B. Wang, "Critical behavior of charged Gauss-Bonnet-AdS black holes in the grand canonical ensemble," Physical Review D, vol. 90 no. 4, article 044063,DOI: 10.1103/PhysRevD.90.044063, 2014.
[36] R. G. Cai, L. M. Cao, L. Li, R. Q. Yang, "P-V criticality in the extended phase space of Gauss-Bonnet black holes in AdS space," Journal of High Energy Physics, vol. 2013,DOI: 10.1007/JHEP09(2013)005, 2013.
[37] M. H. Dehghani, S. Kamrani, A. Sheykhi, "P−V criticality of charged dilatonic black holes," Physical Review D, vol. 90 no. 10, article 104020,DOI: 10.1103/PhysRevD.90.104020, 2014.
[38] R. A. Hennigar, W. G. Brenna, R. B. Mann, "P − v criticality in quasitopological gravity," Journal of High Energy Physics, vol. 2015,DOI: 10.1007/jhep07(2015)077, 2015.
[39] M. Zhang, D. C. Zou, R. H. Yue, "Reentrant phase transitions and triple points of topological AdS black holes in Born-Infeld-massive gravity," Advances in High Energy Physics, vol. 2017,DOI: 10.1155/2017/3819246, 2017.
[40] A. Övgün, "P-v criticality of a specific black hole in f(R) gravity coupled with Yang-Mills field," Advances in High Energy Physics, vol. 2018,DOI: 10.1155/2018/8153721, 2018.
[41] P. Cheng, S. W. Wei, Y. X. Liu, "Critical phenomena in the extended phase space of Kerr-Newman-AdS black holes," Physical Review D, vol. 94 no. 2, article 024025,DOI: 10.1103/PhysRevD.94.024025, 2016.
[42] J. X. Mo, G. Q. Li, X. B. Xu, "Combined effects of f(R) gravity and conformally invariant Maxwell field on the extended phase space thermodynamics of higher-dimensional black holes," European Physical Journal C: Particles and Fields, vol. 76 no. 10,DOI: 10.1140/epjc/s10052-016-4391-3, 2016.
[43] M. S. Ma, L. C. Zhang, H. H. Zhao, R. Zhao, "Phase transition of the higher dimensional charged Gauss-Bonnet black hole in de Sitter spacetime," Advances in High Energy Physics, vol. 2015,DOI: 10.1155/2015/134815, 2015.
[44] J. X. Mo, W. B. Liu, "P-V criticality of conformal anomaly corrected AdS black holes," Advances in High Energy Physics, vol. 2015,DOI: 10.1155/2015/206963, 2015.
[45] H. Xu, W. Xu, L. Zhao, "Extended phase space thermodynamics for third-order Lovelock black holes in diverse dimensions," European Physical Journal C: Particles and Fields, vol. 74 no. 9, article 3074,DOI: 10.1140/epjc/s10052-014-3074-1, 2014.
[46] W. Xu, H. Xu, L. Zhao, "Gauss–Bonnet coupling constant as a free thermodynamical variable and the associated criticality," European Physical Journal C: Particles and Fields, vol. 74 no. 7, article 2970,DOI: 10.1140/epjc/s10052-014-2970-8, 2014.
[47] A. M. Frassino, D. Kubiznak, R. B. Mann, F. Simovic, "Multiple reentrant phase transitions and triple points in Lovelock thermodynamics," Journal of High Energy Physics, vol. 2014,DOI: 10.1007/JHEP09(2014)080, 2014.
[48] S. W. Wei, Y. X. Liu, "Triple points and phase diagrams in the extended phase space of charged Gauss-Bonnet black holes in AdS space," Physical Review D, vol. 90 no. 4, article 044057,DOI: 10.1103/PhysRevD.90.044057, 2014.
[49] N. Altamirano, D. Kubiznak, R. B. Mann, Z. Sherkatghanad, "Thermodynamics of rotating black holes and black rings: phase transitions and thermodynamic volume," Galaxies, vol. 2 no. 1, pp. 89-159, DOI: 10.3390/galaxies2010089, 2014.
[50] D. C. Zou, R. Yue, M. Zhang, "Reentrant phase transitions of higher-dimensional AdS black holes in dRGT massive gravity," The European Physical Journal C, vol. 77 no. 4,DOI: 10.1140/epjc/s10052-017-4822-9, 2017.
[51] H. F. Li, H. H. Zhao, L. C. Zhang, R. Zhao, "Clapeyron equation and phase equilibrium properties in higher dimensional charged topological dilaton AdS black holes with a nonlinear source," European Physical Journal C: Particles and Fields, vol. 77 no. 5,DOI: 10.1140/epjc/s10052-017-4831-8, 2017.
[52] E. Berti, V. Cardoso, A. O. Starinets, "Quasinormal modes of black holes and black branes," Classical and Quantum Gravity, vol. 26 no. 16, article 163001,DOI: 10.1088/0264-9381/26/16/163001, 2009.
[53] R. A. Konoplya, A. Zhidenko, "Quasinormal modes of black holes: from astrophysics to string theory," Reviews of Modern Physics, vol. 83 no. 3, pp. 793-836, DOI: 10.1103/RevModPhys.83.793, 2011.
[54] R. A. Konoplya, A. Zhidenko, "Quasinormal modes of Gauss-Bonnet-AdS black holes: towards holographic description of finite coupling," Journal of High Energy Physics, vol. 2017,DOI: 10.1007/JHEP09(2017)139, 2017.
[55] P. K. Kovtun, A. O. Starinets, "Quasinormal modes and holography," Physical Review D, vol. 72 no. 8, article 086009,DOI: 10.1103/PhysRevD.72.086009, 2005.
[56] M. Luzum, P. Romatschke, "Erratum: conformal relativistic viscous hydrodynamics: applications to RHIC results at s N N = 200 GeV," Physical Review C, vol. 79, article 039903,DOI: 10.1103/PhysRevC.79.039903, 2008.
[57] D. T. Son, A. O. Starinets, "Viscosity, black holes, and quantum field theory," Annual Review of Nuclear and Particle Science, vol. 57 no. 1, pp. 95-118, DOI: 10.1146/annurev.nucl.57.090506.123120, 2007.
[58] S. S. Gubser, I. Mitra, "The evolution of unstable black holes in anti-de Sitter space," Journal of High Energy Physics, vol. 2001,DOI: 10.1088/1126-6708/2001/08/018, 2001.
[59] S. Mahapatra, "Thermodynamics, phase transition and quasinormal modes with Weyl corrections," Journal of High Energy Physics, vol. 2016,DOI: 10.1007/JHEP04(2016)142, 2016.
[60] H. P. Nollert, "Quasinormal modes: the characteristic ‘sound’ of black holes and neutron stars," Classical and Quantum Gravity, vol. 16 no. 12, pp. R159-R216, DOI: 10.1088/0264-9381/16/12/201, 1999.
[61] K. D. Kokkotas, B. G. Schmidt, "Quasi-normal modes of stars and black holes," Living Reviews in Relativity, vol. 2 no. 1,DOI: 10.12942/lrr-1999-2, 1999.
[62] X. P. Rao, B. Wang, G. H. Yang, "Quasinormal modes and phase transition of black holes," Physics Letters B, vol. 649 no. 5-6, pp. 472-477, DOI: 10.1016/j.physletb.2007.04.049, 2007.
[63] X. He, B. Wang, R. G. Cai, C. Y. Lin, "Signature of the black hole phase transition in quasinormal modes," Physics Letters B, vol. 688 no. 2-3, pp. 230-236, DOI: 10.1016/j.physletb.2010.04.006, 2010.
[64] E. Berti, V. Cardoso, "Quasinormal modes and thermodynamic phase transitions," Physical Review D, vol. 77 no. 8, article 087501,DOI: 10.1103/PhysRevD.77.087501, 2008.
[65] J. Shen, B. Wang, C. Y. Lin, R. G. Cai, R. K. Su, "The phase transition and the quasi-normal modes of black holes," Journal of High Energy Physics, vol. 2007,DOI: 10.1088/1126-6708/2007/07/037, 2007.
[66] G. Koutsoumbas, S. Musiri, E. Papantonopoulos, G. Siopsis, "Quasi-normal modes of electromagnetic perturbations of four-dimensional topological black holes with scalar hair," Journal of High Energy Physics, vol. 2006,DOI: 10.1088/1126-6708/2006/10/006, 2006.
[67] D. C. Zou, Y. Liu, C. Y. Zhang, B. Wang, "Dynamical probe of thermodynamical properties in three-dimensional hairy AdS black holes," Europhysics Letters, vol. 116 no. 4, article 40005,DOI: 10.1209/0295-5075/116/40005, 2016.
[68] Y. Liu, D. C. Zou, B. Wang, "Signature of the Van der Waals like small-large charged AdS black hole phase transition in quasinormal modes," Journal of High Energy Physics, vol. 2014,DOI: 10.1007/JHEP09(2014)179, 2014.
[69] M. Chabab, H. El Moumni, S. Iraoui, K. Masmar, "Behavior of quasinormal modes and high dimension RN–AdS black hole phase transition," European Physical Journal C: Particles and Fields, vol. 76 no. 12,DOI: 10.1140/epjc/s10052-016-4518-6, 2016.
[70] M. Zhang, R. H. Yue, "Phase transition and quasinormal modes for spherical black holes in 5D Gauss–Bonnet gravity," Chinese Physics Letters, vol. 35 no. 4, article 040401,DOI: 10.1088/0256-307X/35/4/040401, 2018.
[71] V. V. Kiselev, "Quintessence and black holes," Classical and Quantum Gravity, vol. 20 no. 6, pp. 1187-1197, DOI: 10.1088/0264-9381/20/6/310, 2003.
[72] A. Vikman, "Can dark energy evolve to the phantom?," Physical Review D, vol. 71 no. 2, article 023515,DOI: 10.1103/PhysRevD.71.023515, 2005.
[73] V. Cardoso, R. Konoplya, J. P. S. Lemos, "Quasinormal frequencies of Schwarzschild black holes in anti–de Sitter spacetimes: a complete study of the overtone asymptotic behavior," Physical Review D, vol. 68 no. 4, article 044024,DOI: 10.1103/PhysRevD.68.044024, 2003.
[74] R. A. Konoplya, "Quasinormal modes of a small Schwarzschild–anti-de Sitter black hole," Physical Review D, vol. 66 no. 4, article 044009,DOI: 10.1103/PhysRevD.66.044009, 2002.
You have requested "on-the-fly" machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Show full disclaimer
Neither ProQuest nor its licensors make any representations or warranties with respect to the translations. The translations are automatically generated "AS IS" and "AS AVAILABLE" and are not retained in our systems. PROQUEST AND ITS LICENSORS SPECIFICALLY DISCLAIM ANY AND ALL EXPRESS OR IMPLIED WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES FOR AVAILABILITY, ACCURACY, TIMELINESS, COMPLETENESS, NON-INFRINGMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Your use of the translations is subject to all use restrictions contained in your Electronic Products License Agreement and by using the translation functionality you agree to forgo any and all claims against ProQuest or its licensors for your use of the translation functionality and any output derived there from. Hide full disclaimer
Copyright © 2020 De-Cheng Zou et al. This is an open access article distributed under the Creative Commons Attribution License (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The publication of this article was funded by SCOAP 3 . Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. http://creativecommons.org/licenses/by/4.0/
Abstract
We discuss the
You have requested "on-the-fly" machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Show full disclaimer
Neither ProQuest nor its licensors make any representations or warranties with respect to the translations. The translations are automatically generated "AS IS" and "AS AVAILABLE" and are not retained in our systems. PROQUEST AND ITS LICENSORS SPECIFICALLY DISCLAIM ANY AND ALL EXPRESS OR IMPLIED WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES FOR AVAILABILITY, ACCURACY, TIMELINESS, COMPLETENESS, NON-INFRINGMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Your use of the translations is subject to all use restrictions contained in your Electronic Products License Agreement and by using the translation functionality you agree to forgo any and all claims against ProQuest or its licensors for your use of the translation functionality and any output derived there from. Hide full disclaimer