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Chehouri, A., R. Younes, A. Ilinca, and J. Perron, "Review of performance optimization techniques applied to wind turbines", Applied Energy, vol. 142, pp. 361 - 388, 2015. AbstractWebsite

Abstract This paper presents a review of the optimization techniques and strategies applied to wind turbine performance optimization. The topic is addressed by identifying the most significant objectives, targets and issues, as well as the optimization formulations, schemes and models available in the published literature. The current energy demand combined with depletion of fossil-fuel reserves and stricter environmental regulations have led to the development of alternative renewable energy solutions like wind energy. The current 2030 United States target is to have at least 20% of the \{US\} energy supply by onshore and offshore wind farms. To meet these demands, wind energy costs have to be able to compete with traditional fossil fuel sources. Hence, it is essential and vital that wind turbine designers and manufactures search the optimal solution that fits the objectives under a set of design constraints. Throughout the last 30 years, the objective function has evolved from the earlier maximized metric of the power coefficient to the maximization of the annual energy production. Common alternatives such as blade mass minimization and maximization of the rotor thrust and torque have been examined. However, the main objective has been focused on the minimization of the cost of energy in order for wind energy to become more competitive and economically attractive. The purpose of this paper is to review previous work that undertakes the performance optimization of horizontal wind turbines by highlighting the main aspects when tackling the wind turbine optimization problem such as: objective functions, design constraints, tools and models and optimization algorithms. In addition, in a conclusion of the review, a discussion and argument about the challenges, issues and future developments are identified.

Cerón, E. M., R. C. Mateos, and F. García-Río, "Síndrome de apneas-hipopneas del sueño y diabetes tipo 2. ¿Una relación de ida y vuelta?", Archivos de Bronconeumología, vol. 51, no. 3, pp. 128 - 139, 2015. AbstractWebsite

Resumen Diversos datos epidemiológicos muestran que el síndrome de apneas-hipopneas del sueño (SAHS) se relaciona independientemente con el desarrollo de resistencia a la insulina e intolerancia a la glucosa. Además, y pese a la existencia de notables limitaciones metodológicas, algunos estudios refieren una elevada prevalencia de \{SAHS\} en pacientes con diabetes tipo 2 (DM2). Un reciente metaanálisis muestra que el \{SAHS\} moderado-grave se asocia a un mayor riesgo de \{DM2\} (riesgo relativo = 1,63 [1,09-2,45]), en relación con la ausencia de apneas-hipopneas. La existencia de alteraciones comunes de diversas vías patogénicas le proporciona plausibilidad biológica a esta relación. La hipoxia intermitente y la fragmentación del sueño, originadas por la sucesión de episodios de apneas-hipopneas, inducen diversos trastornos intermedios, como la activación del sistema nervioso simpático, el estrés oxidativo, la inflamación sistémica, alteraciones en las hormonas reguladoras del apetito y activación del eje hipotálamo-hipófiso-suprarrenal, que favorecen el desarrollo de resistencia a la insulina, así como su progresión a intolerancia a la glucosa y, en última instancia, a DM2. La coexistencia del \{SAHS\} parece agravar la evolución de la DM2, al empeorar el control glucémico y potenciar el efecto de la aterosclerosis en el desarrollo de complicaciones macrovasculares. Además, el \{SAHS\} podría asociarse al desarrollo de complicaciones microvasculares, particularmente la retinopatía, nefropatía o neuropatía diabéticas. Aunque todavía escasos, algunos datos sugieren que la \{DM2\} también podría empeorar la evolución del SAHS, al favorecer la colapsabilidad de la vía aérea superior y potenciar la aparición de apneas-hipopneas centrales. Abstract Epidemiological data suggest that sleep apnea-hypopnea syndrome (SAHS) is independently associated with the development of insulin resistance and glucose intolerance. Moreover, despite significant methodological limitations, some studies report a high prevalence of \{SAHS\} in patients with type 2 diabetes mellitus (DM2). A recent meta-analysis shows that moderate-severe \{SAHS\} is associated with an increased risk of \{DM2\} (relative risk = 1.63 [1.09 to 2.45]), compared to the absence of apneas and hypopneas. Common alterations in various pathogenic pathways add biological plausibility to this relationship. Intermittent hypoxia and sleep fragmentation, caused by successive apnea-hypopnea episodes, induce several intermediate disorders, such as activation of the sympathetic nervous system, oxidative stress, systemic inflammation, alterations in appetite-regulating hormones and activation of the hypothalamic-pituitary-adrenal axis which, in turn, favor the development of insulin resistance, its progression to glucose intolerance and, ultimately, to DM2. Concomitant \{SAHS\} seems to increase \{DM2\} severity, since it worsens glycemic control and enhances the effects of atherosclerosis on the development of macrovascular complications. Furthermore, \{SAHS\} may be associated with the development of microvascular complications: retinopathy, nephropathy or diabetic neuropathy in particular. Data are still scant, but it seems that \{DM2\} may also worsen \{SAHS\} progression, by increasing the collapsibility of the upper airway and the development of central apneas and hypopneas.

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Battisha, I. K., H. H. Afify, and Y. Badr, "Structural and photoluminescence behaviors of nano-structure thin film and bulk silica gel derived glasses", Journal of Sol-Gel Science and Technology, vol. 25, no. 1, pp. 5-15, 2002. AbstractWebsite
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Battisha, I. K., M. A. Salem, A. M. S. Nahrawy, Y. Badr, B. Elouady, and M. Kamal, "Erbium activated monolith silica-phosphate glasses planar waveguide and up-conversion mechanism", International Journal of Nano and Biomaterials, vol. 2, no. 1-5, pp. 191-203, 2009. AbstractWebsite
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Battisha, I. K., Y. Badr, N. M. Shash, M. G. El-Shaarawy, and A. G. A. Darwish, "Detection of up-conversion in nano-structure BaTiO3 co-doped with Er3+ and Yb3+ ions", Journal of Sol-Gel Science and Technology, vol. 53, no. 3, pp. 543-550, 2010. AbstractWebsite
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Bassiouni, M., T. ismai, H. Selmy, and Y. Badr, "Optical frequency comb generation by interfering multiple lasers in mach-zehnder modulator", Int. Con.Transparent optical networks, 2019.
Badr, Y. A., S. B. El‐Giziri, T. M. Hammad, and P. E. Tomaszewski, "Comment on the Paper “On the Effect of Doping on the Mechanism of Phase Transition of Some Inorganic Compounds”", physica status solidi (a), vol. 112, no. 1, pp. K13-K14, 1989. AbstractWebsite
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Badr, Y. A., and S. Awad, "On the Low Temperature Phase Transition in Ammonium Sulfate", physica status solidi (a), vol. 72, no. 1, pp. K27-K32, 1982. AbstractWebsite
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Badr, Y., and M. A. Mahmoud, "Optimization and photophysics of cadmium selenide nanoparticles", Physica B: Condensed Matter, vol. 369, no. 1-4, pp. 278-286, 2005. AbstractWebsite
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Badr, Y. A., and S. B. El-Guiziri, "IR and DTA studies of high-temperature phase transition in lithium-ammonium sulphate", Journal of Physics and Chemistry of Solids, vol. 51, no. 5, pp. 421-423, 1990. AbstractWebsite
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Badr, Y., and M. A. Mahmoud, "Effect of silver nanowires on the surface-enhanced Raman spectra (SERS) of the RNA bases", Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, vol. 63, no. 3, pp. 639-645, 2006. AbstractWebsite
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Badr, Y., A. S. Elwanees, and M. A. Mahmoud, "The effect of delay time on the CO and CH3 radicals resulting from the photolysis of acetone by 193 nm excimer laser", Journal of Photochemistry and Photobiology A: Chemistry, vol. 165, no. 1-3, pp. 187-191, 2004. AbstractWebsite
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Badr, Y. A., and S. B. El-Guiziri, "Effect of γ-radiation on the phase transition temperature of Li0.5(NH4)0.5SO4", Journal of Physics and Chemistry of Solids, vol. 50, no. 12, pp. 1261 - 1264, 1989. AbstractWebsite

Polycrystalline lithium-ammonium sulphate samples were subjected to X-ray diffraction analysis for determining the lattice parameters of the prepared mixed crystals. The compositions of the samples were determined using X-ray microanalysis. The Li0.5(NH4)0.5SO4 samples were irradiated with different doses of γ-radiation in order to investigate the effect of this ionizing radiation on the phase transition temperatures Tc1 and Tc2. The temperature dependence of the d.c. resistivity ρd.c. and dielectric constant ϵ of irradiated samples showed (i) a shift of Tc1 to higher temperatures; (ii) a shift of Tc2 to lower temperatures; and (iii) the appearance of a new anomaly near 128°C at moderately high γ-doses. The mechanisms giving rise to this behaviour are discussed.

Badr, Y. A. K., S. V. Karpov, and A. A. Shultin, "SPECTROSCOPIC MANIFESTATION OF THERMALLY ACTIVATED DISORDERING OF NITRATE IONS IN CsNO3AND NaNO3CRYSTALS.", Sov Phys Solid State, vol. 15, no. 8, pp. 1692-1693, 1974. AbstractWebsite
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Badr, Y., S. Abd El-wanees, and M. A. Mahmoud, "Spectroscopic and dynamic studies of the photolysis reaction of acetone by 193 nm excimer laser", Journal of Photochemistry and Photobiology A: Chemistry, vol. 168, no. 1-2, pp. 31-38, 2004. AbstractWebsite
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Badr, Y., Z. I. Ali, A. H. Zahran, and R. M. Khafagy, "Characterization of gamma irradiated polyethylene films by DSC and X-ray diffraction techniques", Polymer International, vol. 49, no. 12, pp. 1555-1560, 2000. AbstractWebsite
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Badr, Y. A., F. El‐Kabbany, and M. Tosson, "DTA and dielectric study of the high temperature phase of Na2SO4", physica status solidi (a), vol. 53, no. 1, pp. K51-K55, 1979. AbstractWebsite
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Badr, Y., and M. A. Mahmoud, "Effect of PVA surrounding medium on ZnSe nanoparticles: Size, optical, and electrical properties", Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, vol. 65, no. 3-4, pp. 584-590, 2006. AbstractWebsite
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Badr, Y., A. Salah, and I. K. Battisha, "Effect of Europium ion concentrations on the photoluminescence emission of nano-crystalline BaTiO3prepared by sol-gel technique", Journal of Sol-Gel Science and Technology, vol. 34, no. 3, pp. 219-226, 2005. AbstractWebsite
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Badr, Y. A., and R. Kamel, "Comparitive study of structure changes with temperature in univalent and divalent ionic nitrate crystals", Journal of Physics and Chemistry of Solids, vol. 41, no. 10, pp. 1127-1131, 1980. AbstractWebsite
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Badr, Y., and M. A. Mahmoud, "Size-dependent surface-enhanced Raman scattering of sodium benzoate on Silver nanoparticles", Journal of Molecular Structure, vol. 749, no. 1-3, pp. 187-192, 2005. AbstractWebsite
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Badr, Y., and M. A. Mahmoud, "Photocatalytic degradation of methyl orange by gold silver nano-core/silica nano-shell", Journal of Physics and Chemistry of Solids, vol. 68, no. 3, pp. 413-419, 2007. AbstractWebsite
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Badr, Y. A., and S. B. El-Guiziri, "Effect of γ-radiation on the phase transition temperature of Li0.5(NH4)0.5SO4", Journal of Physics and Chemistry of Solids, vol. 50, no. 12, pp. 1261-1264, 1989. AbstractWebsite
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Badr, Y. A., and S. I. Hassab Elnaby, "Spectroscopic identification of lipid, protein and DNA changes in breast cancer tissues", AIP Conference Proceedings, vol. 888, pp. 160-166, 2007. Abstract
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Badr, Y., and M. A. Mahmoud, "Enhancement of the optical properties of poly vinyl alcohol by doping with Silver nanoparticles", Journal of Applied Polymer Science, vol. 99, no. 6, pp. 3608-3614, 2006. AbstractWebsite
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