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118 results for “Laser”
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Research ArticleOpen accessEvery word in the titleCircular Rydberg States of Lithium Atoms or Lithium-Like Ions in a High-Frequency Laser Field: The Break of the Algebraic SymmetryNikolay Kryukov, Eugene OksBeletsky, V. V. (2001). Essays on the Motion of Celestial Bodies (1st ed.). Birkhäuser Basel. https://doi.org/10.1007/978-3-0348-8360-3 Bethe, H. A., & Salpeter, E. E. (1957). Quantum Mechanics of One- and Two-Electron Atoms (1st ed.). Springer Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-12869-5 Kapitza, P. L. (1951a). A pendulum with oscillating suspension. Uspekhi Fizicheskikh Nauk, 44(1), 7–20. Kapitza, P. L. (1951b). Dynamic stability of a pendulum … …Physics International, Vol. 13, Issue 1 · 5 Mar 2022 · 7,161 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleFiber Laser Beam Welding Between Niobium and TitaniumRafael Humberto de Mota Siqueira, Isabela Atilio, Caroline Cristine de Andrade Ferreira et al.Niobium and titanium are difficult to weld because of many factors, such as their tendency to oxidize and burn and the relatively high melting temperatures. Here, fiber laser beam welding has been proposed to weld Nb and Ti sheets in overlap geometry. In the current research, one millimeter thick CP-Ti was placed at the top and a 3 mm pure … …Journal of Aircraft and Spacecraft Technology, Vol. 4, Issue 1 · 9 Mar 2020 · 7,715 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleHardening Effects of In-Situ Aging for a Laser Welded Maraging SteelMilton Sergio Fernandes de Lima, Rafael Humberto de Mota Siqueira, Sheila Medeiros de Carvalho, Antonio Jorge AbdallaMaraging steels are ultra-high strength alloys which have been successfully laser welded to obtain structural components. For most of the applications these steels are in an aged state to attain tensile strength up to 1.5 GPa, although welding induces local softening due to dissolution of precipitates. This paper aims to investigate the effect of in-situ aging of the maraging steel … …Journal of Aircraft and Spacecraft Technology, Vol. 3, Issue 1 · 12 Nov 2019 · 7,210 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleComparison of 10 cm and 50 cm Long Iodine Cells in Iodine-Stabilized Diode Laser-Pumped Nd:YAG Laser at 532 nmPrayut Potirak, Monludee Ranusawud, Pichet Limsuwan, Prathan BuranasiriAn iodine-stabilized diode laser-pumped Nd:YAG laser system at 532 nm was developed at the National Institute of Metrology of Thailand (NIMT) for the first time in Thailand. Two iodine cells with the lengths of 10 and 50 cm were used for the comparison of frequency stability of Nd:YAG laser. The experiment was set for phase modulation spectroscopy. The Nd:YAG laser … …American Journal of Applied Sciences, Vol. 15, Issue 5 · 26 May 2018 · 7,886 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleLaser-Induced Breakdown and Detonation in Particle-Laden SystemsKonstantin VolkovSimulation of the interaction of a laser pulse with gas-droplet and gas-particle mixtures plays an important role in environmental and engineering applications. The injection of liquid droplets or metal particle causes optical breakdown on the individual droplet or particle and leads to a drop of the detonation minimum pulse energy of the mixture. Mathematical models of various stages of the … …American Journal of Applied Sciences, Vol. 12, Issue 1 · 4 Mar 2015 · 7,348 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleGROWTH OF YB3+ DOPED LiNBO3 CRYSTALS USING LASER HEATED PEDESTAL GROWTH METHODBariza Boudour, Youcef Boumaiza, Amar BoudourThe growth of LN single crystals free from defects greatly doped with rare earth elements (RE3+) and having a high optical quality is still an unresolved problem. Always, crystals of the niobate lithium contain a deficiency in lithium causing the appearance of intrinsic defects and thus a doping is required for the homogeneity. Our work was aimed to study the … …American Journal of Applied Sciences, Vol. 11, Issue 5 · 17 Feb 2014 · 6,912 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleModification of Carbon Steel by Laser Surface Melting: Part II: Effect of Laser Beam Power on Microstructural Features and Surface HardnessHashem F. El-Labban, M. Abdelaziz, Essam R.I. MahmoudThe surface hardness has an important effect on the wear resistance of different materials. The present study aims to improve the surface hardness of carbon steel through the application of laser surface melting with suitable conditions. The laser beam power and travelling speed are the main factors that affect the properties of the treated zone. In this study, three different … …American Journal of Engineering and Applied Sciences, Vol. 6, Issue 4 · 30 Jan 2014 · 7,208 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleModification of Carbon Steel by Laser Surface Melting: Part I: Effect of Laser Beam Travelling Speed on Microstructural Features and Surface HardnessHashem F. El-Labban, M. Abdelaziz, Essam R.I. MahmoudThe present study aims to improve the surface hardness of carbon steel by application of laser surface melting of effective conditions. The travelling speed of laser beam during this treatment is one of the important treatment conditions. This study aims to investigate the effect of laser surface melting with different beam speeds on macro and microstructure as well as the … …American Journal of Engineering and Applied Sciences, Vol. 6, Issue 4 · 2 Jan 2014 · 7,400 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleRobust Positioning of Laser Beams Using Proportional Integral Derivative and Based Observer-Feedback ControlKwabena A. Konadu, Sun Yi, Wonchang Choi, Taher Abu-LebdehHigh-precision positioning of laser beams has been a great challenge in industry due to inevitable existence of noise and disturbance. The work presented in this study addresses this problem by employing two different control strategies: Proportional Integral Derivative (PID) control and state feedback control with an observer. The control strategies are intended to stabilize the position of a laser beam … …American Journal of Applied Sciences, Vol. 10, Issue 4 · 19 Apr 2013 · 6,868 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffect of Laser Therapy in Inflamed Tissue by Medications Based on Iodoform Laser Therapy in Inflamed TissuePablicia Juliana Santos Tomaz, Michelle de Paula Farias, Marta Rabello Piva et al.This study aimed to evaluate the inflammatory response of the subcutaneous tissue of twenty rats when the use of iodoform with different drugs or not associated with laser photobiomodulation. In the dorsum of rats were introduced into tubes containing: Iodoform and calcium hydroxide (Ca (OH)2); Iodoform and Ca(OH)2, associated with Laser; Iodoform and Otosporin; Iodoform and Otosporin, associated with Laser. … …American Journal of Applied Sciences, Vol. 10, Issue 1 · 18 Jan 2013 · 6,945 accessesView PDFCite