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Calculation and Experimental Technique for Determining the Damping Properties of Composite Materials S.I.
At the same time, an increase in the vibration frequency was observed, which indicates an increase in the elastic properties of composite materials.
References [1] Ebrahimi F and Barati M R 2017 Smart Materials and Structures 26(6) 065018 [2] Gerstenberger C, Osiecki T, Kroll L, Scholz P and Seidlitz H 2016 Archives of civil and mechanical engineering 16(3) 467–472 [3] Koryagin S I, Velikanov N L and Sharkov O V 2017 Key Engineering Materials 736 8–11
[4] Krishan K C 2013 Composite Materials: Science and Engineering (New York: Springer Science & Business Media) p. 542 [5] Chung D L 2010 Composite Materials: Science and Applications (New York: Springer Science & Business Media) p. 371 [6] Fernando U S and Davidson M 2015 Proceedings of the ASME 34th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2015) 5B V05BT04A013 [7] Zamani H A and Aghdam M M 2017 Journal of Vibration and Control 23(18) 2869–2887 [8] Kolahchi R, Zarei M S, Hajmohammad M H and Nouri A 2017 International Journal of Mechanical Sciences 130 534–545 [9] Falborski T and Jankowski R 2017 Applied Sciences 7(8) 808 [10] Junker P and Kochmann D M 2017 International Journal of Solids and Structures 113–114 132–146 [11] Prasad D S and Shoba C 2016 Journal of Materials Research and Technology 5(2) 123–130 [12] Abramovich H, Govich D and Grunwald A 2015 Progress in Aerospace Sciences 78 8–18 [13] Akoussan K, Boudaoud H, Daya E M, Koutsawa Y and
Part B: Engineering 78 144–152 [16] Fritzen F and Kochmann D M 2014 International Journal of Solids and Structures 51(23–24) 4101–4112 [17] Vescovini R and Bisagni C 2015 Progress in Aerospace Sciences 78 19–29 [18] ASTM E756-05 2017 Standard Test Method for Measuring Vibration-Damping Properties of Materials (West Conshohocken, USA: ASTM International) p. 14 [19] SAE J1637 2013 Laboratory Measurement of the Composite Vibration Damping properties of Materials on a Supporting Steel Bar (Warrendale, USA: SAE International) p. 16 [20] Tweten D J, Ballard Z and Mann B P 2014 Journal of Sound and Vibration 333(13) 2804–2811 [21] Nakutis Ž and Kaškonas P 2011 Measurement 44(2) 487–492 [22] Paymushin V N, Firsov V A, Gunal I and Egorov A G 2014 Mechanics of Composite Materials 50 127–136

Experiments were performed by using an improved test system of physical parameters of rock materials.
In this paper, an improved test system of physical parameters of rock materials was employed to test permeability and porosity of tight rock materials under high temperature and high pressure.
Fig. 1 Schematic diagram of flow chart of experimental facility Experimental Materials and Method The main experimental materials were tight rock and distilled water.
Results show that there are some micro-cracks in the tight rock materials although the experimental model samples of tight rock materials have no macroscopic cracks.
Frangos: Journal of Geophysical Research Vol.73 (1968), p.2225

It can also according to the ecosystem of the material divided into three parts, namely the natural materials that can grow, the nonrenewable materials made by human and the materials that have characteristic between natural materials and artificial materials.
Furthermore, new materials of modified form basically have new features materials and conform to the type of materials.
This type of building skin fully by means of science and technology increasingly appeared in the contemporary architecture.
From the architectural skin to Epidermal architecture,Journal of new buildings, 5 (2008) 50-56
[6] Yong He.The Cognitive construction and construction logic of epidermis material, Architectural Journal ,7(2009)72-73

Materials and Design Vol.27 (2006), p. 329-337
Materials and Design, Vol.47 (2013), p. 643-652
Materials and Design, Vol. 51 (2013), p.484-492
International Journal of Mechanics and Materials in Design, Vol. 3 (2006), p. 209-222
(Science Press, Beijing 2010)

The three most common categories were environmental sciences & ecology (2704 papers; accounting for 45.1% of the total), meteorology & atmospheric sciences (1551; 25.9%), and engineering (1170; 19.5%).
Thus emission inventory had certain research value in the field of both natural science and social science.
Journal of Geophysical Research-atmosphere published the second most articles (296), followed by Environment Science & Technology (283), Atmospheric Chemistry and Physics (268), International Journal of Life Cycle Assessment (184) and Journal of The Air & Waste Management Association (112).
Table 1 Comparison of the top 20 most active journals in emission inventory research Journals TP TP（%） TC TC/TP IF Atmospheric Environment 601 10.03 12060 20.07 3.11 Journal of Geophysical Research-atmosphere 296 4.94 11375 38.43 3.17 Environment Science & Technology 283 4.72 8437 29.81 5.26 Atmospheric Chemistry and Physics 268 4.47 7546 28.16 5.5 International Journal of Life Cycle Assessment 184 3.07 2654 14.42 2.78 Journal of The Air & Waste Management Association 112 1.87 985 8.79 1.20 Science of The Total Environment 102 1.70 2239 21.95 3.26 Chemosphere 82 1.37 2071 25.26 3.14 Geophysical Research Letters 70 1.17 1965 28.07 3.98 Environmental Pollution 66 1.10 1264 19.15 3.73 Journal of Cleaner Production 55 0.92 681 12.38 3.40 Journal of Nuclear Materials 49 0.82 546 11.14 1.21 Forest Ecology and Management 47 0.78 702 14.94 2.77 Global Biogeochemical Cycles 46 0.77 2229 48.46 4.68 Global Change Biology 45 0.75 1937 43.04 6.91 Energy Policy 44 0.73 503 11.43 2.74 Water Air and
Environmental sciences & ecology, meteorology & atmospheric science, and engineering were subject categories that published the most emission inventory-related papers.

Methodology Materials.
Virgin plastic pellets are crude oil-based materials [33], therefore these raw materials are non-renewable.
Martin: Testing of Materials, In C.A.
Materials Science Forum, Vol. 936 (2018), 116-120
Matei, et al.: Recycled polypropylene improved with thermoplastic elastomers, International Journal of Polymer Science, (2017), 7525923

Technical analysis of the performance optimization of nanospintronics devices based on carbonaceous materials has been presented in this paper.
Carbonaceous Materials in Nanospintronics The theory of nanospintronics is now well understood, especially for magnetic semiconductor material like GaMnAs.
Another important result is that the spin diffusion length is greater than 230 nm for electrons, and 310 nm for holes in the corresponding materials.
New Materials and their Selection for Designing and Fabricating the Spintronic Devices - A Technical Note.
Invertis Journal of Science & Technology, 7(4), 246-254

The applicability of CaCO3 whiskers in cement construction materials Construction materials have been playing increasingly important roles in most of the engineerings.
Cemment based materials ,are the most important part of construction materials at present.
References [1] H X Chen, R C Song., Journal of Materials Science & Engineering, 2004, 22(2): 197-200 [2] OTAY, INUI S, IWASHITA T, et al.
New Chemical Materials,1998,26(10): 23-24
Journal of Inorganic Materials, 2005, 20(6): 1349−1352

Some Considerations Concerning the Differential Scanning Calorimetry of Ultra Tough Plastic Materials NEDELCU Dumitru1*, LOHAN Nicoleta Monica2, CARAUSU Constantin1, PRUTEANU Octavian1 1 “Gheorghe Asachi” Technical University of Iasi, Department of Machine Manufacturing Technologies, Blvd.
Mangeron, No. 59A, 700050 Iasi, Romania, Tel-Fax: 0040.232.217290, 2“Gheorghe Asachi” Technical University of Iasi, Faculty of Materials Science and Engineering, *dnedelcu@tcm.tuiasi.ro; monica.lohan@yahoo.com; c_carausu@yahoo.com; pluteanu@yahoo.com Key words: Calorimetry, Injection, Ultra Tough Plastic Materials Abstract: The Differential Scanning Calorimetry (DSC) has been an important analysis in research since the 20th century, being used is various fields such as: physics, chemistry and materials technology.
The research described in this paper focuses on the study of calorimetry of ultra tough plastic materials, such B4300G4 and B4300G6.
Schick, Calorimetry, Polymer Science: A Comprehensive Reference, 2, (2012), 793–823 [4] W.
Keller, Effect of thermal lag on glass transition temperature of polymers measured by DMA, International Journal of Adhesion & Adhesives, 52, (2014), 31–39 [5] D.

Thermal protection materials are required to preserve the metal components of motor that suffer severe heat load.
Introduction Polymeric Ablative Materials (PAMs) are used to provide insulation to Solid Rocket Motors [1-4].
Lin W S[5] studied the quasi-steady solutions for the ablation of charring materials.
Test Methodology To get the thermo-ablative properties of EPDM thermal protection material, the materials were tested through a connected pipe test facility.
[2] Ahmed AF and Hoa SV: Journal of Composite Material.