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The velocity of the determinations also indicated fresh and intact materials.
http;//www.script.org/Journal/Paper.aspx?
Materials testing.
[20] GBG: Materials testing and structural investigations- rebound hammer testing (Schmidt hammer). http://www.gbg.co.uk/?
J. of Minerals, Metall. and Materials, 16. (2009) 615-619

Introduction The alloy VT22 (5Al–5Mo–5V–1Cr–1Fe) is a high-strength high-alloyed α+β-titanium alloy of the transitional class, developed in 1965 of the previous century in the All-Russian Research Institute of Aviation Materials.
Original Materials and Research Conduct Method The initial data for the statistical analysis were the results of experimental research and production tests as well as reference data [20-23].
Boyer and other, Materials Properties Handbook.
The Material Information Society. 1994
Rosenberg, Ti-10V-2Fe-3Al: A forging alloy development, Proceedings of the Metal Society Conference on Forging and Properties of Aerospace Materials, The Metals Society.

Much efforts are being devoted on the development of armor materials which can provide greater ballistic protection.
Amongst all materials, ultra high strength steels (UHSS) are the most extensively used metallic armor today.
Materials and Experimental Details The steel alloy was processed by melting in 20 tons Electric Arc Furnace (EAF), and followed by Ladle Furnace (LF) treatment for secondary refining.
Balakrishna Bhat, “Effect of heat treatment on mechanical and ballistic properties of a high strength armour steel”, International Journal of Impact Engineering 37 (2010) 242
Balakrishna Bhat , “Science of armour materials”, Def.

For the experiment, the volume of the combustion chamber was set to 400cc, and the combustion chamber material was set to be the duralumin that can withstand up to 200 bar, while quartz, which can withstand 150 bar.
Acknowledgment This Research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education(No. 2020R1F1A1076408) References [1] B.
Journal of Korean Society for Atmospheric Environment. 23(3) (2007) 344-352
Lee, A Case Study on LFG Emission from Various Sources in Waste Landfill, JOURNAL OF KOREA SOCIETY OF WASTE MANAGEMENT. 2019, 93-93
Jazayeri, Effect of hydrogen addition on RCCI combustion of a heavy duty diesel engine fueled with landfill gas and diesel oil, International Journal of Hydrogen Energy. 44 (14) (2019) 7607-7615

A fuzzy linguistic go/no-go decision model in new product development Hong-Bin Yan∗,a and Tieju Mab School of Business, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, P.R.
Schmidt: Journal of Product Innovation Management, vol. 16 (1999), pp. 65--76
Lawry: International Journal of Approximate Reasoning, vol. 28 (2001), pp. 51--89
Ozer: European Journal of Operational Research, vol. 163 (2005), pp. 784--801
Lilien: Journal of Marketing Research, vol. 34 (1997), pp. 177--184.

Crashworthiness Simulation Analysis of Light Sport Aircraft Fuselage Structure Puwoei Chen1, a, Shuhan Chang2, b, Yuyang Hsieh1, c and Taising Sun3, d 1Department of Aerospace Engineering, Tamkang University, 151 Ying-Chuan Road, Tamsui, 25137, Taiwan 2General Education Center, Hsiuping Institute of Technology, 11 Gongye Rd, Dali City, Taichung County 41280, Taiwan 3Department of Aviation Services and Management, China University of Science and Technology, 245 Sec. 3, Academia Road, Taipei 11581, Taiwan apchen@mail.tku.edu.tw, bshc@mail.hit.edu.tw, c697430717@s97.tku.edu.tw, dtomsun@cc.cust.edu.tw Keywords: Light Sport Aircraft, Crashworthiness, Finite Element Analysis Abstract.
A report [1] published in the Journal of the American Medical Association (JAMA) indicates that 91% of all aircraft crashes are general aviation crashes, which also account for 94% of all fatalities.
This study used 6061-T6 aluminum alloy as the structure material.
Baker, “Crash Risk in General Aviation”, The Journal of the American Medical Association, Vol. 297, No. 14, 2007
Reed and James Avery, “Principles for Improving Structural Crash Worthiness for STOL and CTOL Aircraft”, US Army Aviation Material Laboratories Technical Report 66 39, June 1966

Moreover, the materials of rotors also can be optimized.
Journal of Renewable and Sustainable Enegry,1,033110 (2009)
International Journal of Energy Research. ,32:877-895 (2008)
Experimental Thermal and Fluid Science. 32:580-586 (2007)

Journal of Anyang Normal College, Vol. 2.(2010) , p. 86-89 .
Resource Science, Vol. 33(5)(2011) , p. 897-904 .
Building materials should be selected locally with recycle way.
Journal of Guangxi Finance University, Vol. 24(2)(2011) , p. 122-144 Currently, over 10 countries, like England, Germany, Japan, Korea etc, are implementing authentication of low-carbon products to encourage low-carbon products and provide low-carbon services, estimate carbon emission in lifecycle and award carbon brand.

Synthesis, Crystal Structure and Fluorescence Spectrum Studies of Bromocoumarin Derivants: C10H5Br3O and C12H9BrO4 Ying Wang*, Peng Liu, Xue-Long Li and Jia-Jun Fu School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China Keywords: bromocoumarin derivant, crystal structure, synthesis, fluorescence spectrum.
Rampally, “Synthesis of 7-hydroxy-4-methylcoumarin using polyaniline supported acid catalyst, ”Journal of Molecular Catalysis A: Chemical,. vol. 209, pp.117-124, 2004
Vishnu Priya,et al, “Synth- esis of 7-hydroxy-4-methyl coumarin over Lewis acid metal ion-exchanged ZAPO-5 molecular sieves,” Microporous and Mesoporous Materials, vol. 118, pp. 523-530, 2009
Andrei, “Direct fluorination of coumarin, 6-methyl-coumarin and 7-alkoxy-coumarins,” Journal of Fluorine Chemistry,vol. 126, pp. 1377-1383, 2005.

Mechatronics Design of Intelligent Robotic Gripper Asheber W.T1, a *, Chyi-Yeu Lin2, b 1,2Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei, 10607 Taiwan aemail: D10103807@mail.ntust.edu.tw, bemail: jerrylin@mail.ntust.edu.tw Keywords: finger gripper, robot grasping, intelligent gripper, mechatronics design, vision sensor, tactile sensor Abstract- This work presents multi-functional robot arm gripper design along with vision and tactile sensor for efficient grasping and manipulation tasks.
Robot arms are designed to move materials, parts, tools, or any other object using pre-programmed motion for execution of these tasks effectively.
Industrial Robot: An International Journal, 2005. 32(3): p. 268-281
Journal of Computational and Nonlinear Dynamics, 2012. 8(2): p. 021010-021010.