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In the work of Fett et al. [10], the change of Young's modulus under compressive stress loading was studied for initially unpoled and pre-poled soft PZT material using a partial unloading method.
Recently, Selten et al. [11] reported a detailed experimental study for unpoled soft PZT material.
As emphasized by Selten el al. [11], the time-dependent effect of piezoceramics has to be taken into account in investigation of the loading history dependence of the linear material parameters.
The results are in good agreement with measurements reported by Selten et al. [11] for a different soft PZT material.

A Comparative Study on the Tribological Behavior of SAE-AISI 1055 Steel and Brass (CuZn39Pb2) a Pin on Disc Type of Contact Bougoffa Mohammed Seyf Eddine1,a* Mebrouki Noura2,b 1Laboratoire de Science et Génie des Matériaux, Faculté de Génie Mécanique et Procédés U.S.T.H.B, B.P. 32 El Alia, Bab Ezzouar, Alger 16111, Algeria 2Laboratoire de Rayonnement et Plasmas et Physique des Surfaces, Faculté des Mathématiques et des Sciences de la Matière, Université Kasdi Merbah Ouargla, Ouargla 30000 (Algérie) ambougoffa@usthb.dz, bmabroukinawara@gmail.com Keywords: Friction coefficient, Wear loss, Initial surface roughness, Normal load, sliding speed.
Specimen Material Chemical composition [%wt] Hardn-ess Surface roughness Ra[μm] Disc Steel C Mn P Si S 62±0.5HRC 0.39 1.82 0.55 0.6 0.06 0.25 0.03 Brass Cu Sn Zn Ni Fe Al Pb2 63.2±0.5 HRB 0.46 2.16 Remainder 0.05 balance 0.2 0.05 0.02 1.5-2.5 Ball AISI- 52100 Steel Fe C Mn Si S P Cr 780 HV30 0.09±0.003 Remainder 1.05 0.4 0.25 0.025 0.025 1.45 At the end of the tests, the worn surfaces of the test specimens were analyzed using scanning electron microscope techniques to characterize the wear modes, resulting surface damage and wear volume.
[5] Yanliang Yi, et al, Effect of normal load on two-body abrasive wear of an Fe-B-Cr-C based alloy with minor Cu and Ni additions, wear.
Elhadi a, et al, Study of Surface Wear and Damage Induced by Dry Sliding of Tempered AISI 4140 Steel against Hardened AISI 1055 Steel, tribology in industry, Vol. 38, No. 4 (2016) 475-485
[22] Sheng-cheng ZHANG, Qing-lin PAN1,2, Jie YAN1, Xing HUANG1, Effects of sliding velocity and normal load on tribological behavior of aged Al−Sn−Cu alloy, Trans.

As reported by Ahmad et al. [10], in CO2/N2 separation process, the increase in the membrane thickness has decreased the permeability with no significant effect on the separation performance.
The production process is according to Sulaiman et al. [14] Both types of solution were coated as a thin layer on the polysulfone membrane by using a glass rod.
Besides that, Zulfikar et al. [15] stated that as the silica content increased, the Tg increased further, indicating that the polymer chains were becoming more rigid with the introduction of inorganic silica.
El-Rassy, Mercury removal from aqueous solutions using silica, polyacrylamide and hybrid silica-polyacrylamide aerogels, Chem.
[10] A.L.

In addition, Qin et al. [7] synthesized and assessed two kinetic hydrate inhibitors, which were obtained by introducing a t-butyl group and both t-butyl and phenyl groups into PVP molecules.
A series of polymers of 2-vinyl-4,4-dimethylazlactone (VDMA) of varying molecular weights modified with small organic amines have been synthesized by Ree et al. [19], and their kinetic inhibition performance has been investigated in high pressure steel rocking cells.
Six novel polymers and co-polymers containing various organic moieties and pendent groups were synthesized and evaluated by Lou et al. [20], and the experimental results showed that the new KHIs are as effective as two commercially available hydrate inhibitors, Luvicap EG and Gaffix VC-713, in preventing the formation of THF hydrate.
Al-Adel, J.A.G.
El-Ghafari, and P.

For ergonomic quality, it was associated with the methodology of the author Martins [10], called OIKOS (from the Greek “cocoon” in analogy to comfort), supported by the studies of Avila et al [12], Jordan [13], and Nicolini [14] that assesses the ergonomics and usability of clothing products.
[5] Suriadi, [et al.] -: Development of a new risk assessment scale for predicting pressure ulcers in an intensive care unit.
[12] Ávila, R. et al.: ergonomía para el diseño.
Kottner et al., “Prevention and treatment of pressure ulcers/injuries: The protocol for the second update of the international Clinical Practice Guideline 2019,” J.

The electrochemical setup comprised a 0.3 M H2SO4 acid, an anode (a pre-treated Al sheet) and a cathode (a Pb plate).
The Al foils are then dried and used as anodes in the electrochemical cell.
Thus, to monitor the average contact pressure during reloading of the indenter, the procedure suggested by Novikov et al [29] and Carneiro et al [30] was used.
The instantaneous value for the elastic deflection h(el)i of the sample surface at contact perimeter was obtained as: (11) where Pi is the instantaneous value of the applied load.
Habazaki, Pore development during anodizing of Al–3.5 at.

Box 1505, El-M’Naouer, 31000, Oran, Algeria 2Smart Structures Laboratory.
Zheng and Dalton [7]; Anet al. [9]; Suthon and Dalton [9, 10]).
Most of the regimes observed by TB90 have been reproduced by 2D numerical models of Iliadis and Anagnostopoulos [16]; Dutsch et al.[17]; Uzunoglu et al. [18] and 3D models of Nehari et al.[15]; Elston et al. [19]; Scandura et al. [20]; An et al. [8, 21] and Nuriev et al.[22].
Hydrodynamics around oscillating cylinders was also investigated in a large number of studies for multiple shapes (Bearmanet al. [27]; Chu-Chang et al. [28] and Sumner et al. [29]).
Other computational studies of oscillatory flow around a cylinder with an elliptic cross-section have been carried-out to explore the effects of the elliptic cross-sections by Yang et al. [37]; Daoudet al. [38] and Gallardo et al. [39].

BP 32, El Alia, Bab Ezzouar, 16111 Alger, Algeria 3 CRNA, 2, Bd.
Only HF-based solutions were used to prepare SiNWs until recently a new chemical solution containing NH4HF2 was used by Brahiti et al.
This model also remains valid when NH4HF2-based solution is used as was reported by Brahiti et al.
These results are similar to those reported by M-L Zhang et al. [32].
Also,a similar conclusion was proposed by Zhao et al., which indicates that the PL emission of porous silicon is related to the Si-O vibration mode [44].

Pawson; et al, Plantation forests, climate change and biodiversity, Biodiversity and Conservation, Vol. (22), pp.1203–1227, May 2013. [2] Michela Nocetti; et al, Variability of wood properties in two wild cherry clonal trials, Wood Science and Technology, Vol. 44(4), pp.621–637, Nov 2010
Lahiji; et al, Atomic Force Microscopy Characterization of Cellulose Nanocrystals, American Chemical Society, Langmuir, Vol.26(6), PP.4480–4488, Jul 2010 [11] Roland R.
Dute and Thomas Elder, Atomic Force Microscopy of Torus-Bearing Pit Membranes, IAWA Journal, Vol. 32 (4), pp.415–430, 2011 [12] Jiaojiao Miao; el al, Partial delignification of wood and membrane preparation using a quaternary ammonium ionic liquid, Scientific Reports, Vol. 7(1), pp. 42472, March 2017 [13] Ghiath Jnido; et al, Deposition of TiO2 Thin Films on Wood Substrate by an Air Atmospheric Pressure Plasma Jet, Coatings, Vol. 9(7), pp.441, July 2019 [14] Chaoji Chen, Jianwei Song, Shuze Zhu, Teng Li, Jia Xie, Liangbing Hu, Scalable and Sustainable Approach toward Highly Compressible, Anisotropic, Lamellar Carbon Sponge, Chem 4, pp. 544–554, March 8, 2018

Mouritz et al. investigated the post-fire mechanical properties of the fibre-reinforced phenolic composite under the high heat fluxes of 50, 75 and 100 kW m-2 adopting cone calorimeter [6, 8].
Similar to the research of Mouritz et al. [6, 8], fire characteristics of the fibre-reinforced phenolic composite under the low heat fluxes were not noted either.
The elementary analysis of the fibre-reinforced phenolic composite was conducted by an elemental analyzer Vario EL III.
Delichatsios et al. [18] proposed that the relation between the minimum heat flux and the theoretical CHF conformed to: (3) Then the minimum heat flux can be theoretically calculated to be 29.31 kW m-2.
Li et al, The METRO project, final report, Technical Report: SiST 2012:8, Sweden: Mälardalen University Press, 2012