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Online since: March 2013
Authors: Beom H. Lee, Jae D. Jeon, Kong Woo Lee
For , Blazewicz et al. [3] and Hoogeveen et al. [4] showed that P3|fixj|Cmax is non-deterministic polynomial-time hard (NP-hard) in the strong sense by a reduction from 3-Partition problem.
This was improved later to ratio 5/4 by Dell’Olmo et al. [5].
Recently, Jeon et al. [1] suggested an online algorithm for P3|online,fixj,rj|Cmax.
Graham, E.L.
Eades, et al, Lecture Notes in Computer Science 2223, Berlin: Springer-Verlag (2001), pp. 48-60
This was improved later to ratio 5/4 by Dell’Olmo et al. [5].
Recently, Jeon et al. [1] suggested an online algorithm for P3|online,fixj,rj|Cmax.
Graham, E.L.
Eades, et al, Lecture Notes in Computer Science 2223, Berlin: Springer-Verlag (2001), pp. 48-60
Online since: January 2022
Authors: Olivier Plé, Feras Abdul-Samad, Noémie Prime, Taini Chitimbo
Similar work exists (Jaquin et al., 2008) (Miccoli et al., 2014) and generally it was observed that both compressive strength and Young’s modulus decreases with increases in water content.
(Chauhan et al., 2019) and (François et al., 2017) performed experiments to study the behavior of rammed earth with the point of view of unsaturated soil mechanics.
This is known as stage 1 of drying and is associated with a constant drying rate period (Hall et al, 1984) .
The DIC data processing was performed with 7D software developed by the laboratory SYMME (Vacher et al.,1999).
Construction and Building Materials, 110, 70–78. https://doi.org/10.1016/j.conbuildmat.2016.01.027 [4] Chauhan, P., El Hajjar, A., Prime, N., & Plé, O. (2019).
(Chauhan et al., 2019) and (François et al., 2017) performed experiments to study the behavior of rammed earth with the point of view of unsaturated soil mechanics.
This is known as stage 1 of drying and is associated with a constant drying rate period (Hall et al, 1984) .
The DIC data processing was performed with 7D software developed by the laboratory SYMME (Vacher et al.,1999).
Construction and Building Materials, 110, 70–78. https://doi.org/10.1016/j.conbuildmat.2016.01.027 [4] Chauhan, P., El Hajjar, A., Prime, N., & Plé, O. (2019).
Online since: September 2023
Authors: David Gómez-García, Antonio Díaz-Álvarez, María Henar Miguélez, José Díaz-Álvarez
References
[1] Alexandru Pıˆrjan, Dana-Mihaela Petro¸sanu, et al.
[6] Nouf Al Hameir, Maitha Al Shamsi, and Waleed Ahmed.
[9] Anouar El Magri, Khalil El Mabrouk, S ́ebastien Vaudreuil, Hicham Chibane and Mohamed Ebn Touhami.
[6] Nouf Al Hameir, Maitha Al Shamsi, and Waleed Ahmed.
[9] Anouar El Magri, Khalil El Mabrouk, S ́ebastien Vaudreuil, Hicham Chibane and Mohamed Ebn Touhami.
Online since: January 2024
Authors: Sivakumar Ramakrishan, Pugalyenthiran Sinaiyah, Sanjith Udayakumar, Hashim Hussin
References
[1] Flörke OW, Graetsch HA, Brunk F, Benda L, Paschen S, Bergna HE, et al.
[10] Ibrahim AF, Seifelnassr AA, Al-Abady A, El-Salmawy MS, Abdelaal AM.
Characterization and Iron Removal Enhancement of El-Zaafarana White Sand.
[14] Ye G, Huo Y, Li C, Deng C, Yu Y, Huang G, et al.
[10] Ibrahim AF, Seifelnassr AA, Al-Abady A, El-Salmawy MS, Abdelaal AM.
Characterization and Iron Removal Enhancement of El-Zaafarana White Sand.
[14] Ye G, Huo Y, Li C, Deng C, Yu Y, Huang G, et al.
Online since: January 2026
Authors: Mohamed Janati, Lmokhtar Ikhharrazne, Mustapha Lamine
In this context, the study by Abid et al. [9] highlighted the significance of using nonlinear viscous
dampers and their effect on improving the dynamic behavior of structures, particularly in response to
seismic excitations.
Specifically, Rahmouni et al. [4] used a finite element model to investigate nonlinear vibrations in beams and showed excellent agreement between numerical and analytical results.
+ Cnlr+2) , r = 1, . . . , 4 (20) br,r,r,r+1 = − 1 l4 (4Cnlr+1 + Cnlr+2) , r = 1, . . . , 4 (21) br,r+2,r+2,r+2 = 1 2l4Cnlr+2, r = 1, . . . , 3 (22) br,r+1,r+2,r = −Cnlr+2 l4 , r = 1, . . . , 3 (23) br,r+2,r+1,r+1 = 2Cnlr+2 l4 , r = 1, . . . , 3 (24) br,r+1,r,r+2 = −Cnlr+2 l4 , r = 1, . . . , 3 (25) br,r,r,r+2 = Cnlr+2 2l4 , r = 1, . . . , 3 (26) br,r+2,r+2,r = Cnlr+2 2l4 , r = 1, . . . , 3 (27)The integrated difference of the kinetic and potential energy is to be minimized according to Hamilton's principle, so: δ 2π ωNL∫ 0 (V − T)dt = 0 (28) Substituting equations 12, 13 and 17 in 28 gives the following system of nonlinear algebraic equations: 3 2aiajakbijkr + ai˜kr − aiω2NLmir = 0 (29) The matrix form is expressed as: 3 2 [B(a)] {a} + [K] {a} − ω2NL [M] {a} = 0 (30) [B]: Nonlinear rigidity Matrix [K]: Linear rigidity Matrix [M]: Mass Matrix Explicit formulation for large-amplitude free vibrations The explicit method was initially introduced by Benamar et al
El Kadiri, R.
El Ghoulbzouri, and L.
Specifically, Rahmouni et al. [4] used a finite element model to investigate nonlinear vibrations in beams and showed excellent agreement between numerical and analytical results.
+ Cnlr+2) , r = 1, . . . , 4 (20) br,r,r,r+1 = − 1 l4 (4Cnlr+1 + Cnlr+2) , r = 1, . . . , 4 (21) br,r+2,r+2,r+2 = 1 2l4Cnlr+2, r = 1, . . . , 3 (22) br,r+1,r+2,r = −Cnlr+2 l4 , r = 1, . . . , 3 (23) br,r+2,r+1,r+1 = 2Cnlr+2 l4 , r = 1, . . . , 3 (24) br,r+1,r,r+2 = −Cnlr+2 l4 , r = 1, . . . , 3 (25) br,r,r,r+2 = Cnlr+2 2l4 , r = 1, . . . , 3 (26) br,r+2,r+2,r = Cnlr+2 2l4 , r = 1, . . . , 3 (27)The integrated difference of the kinetic and potential energy is to be minimized according to Hamilton's principle, so: δ 2π ωNL∫ 0 (V − T)dt = 0 (28) Substituting equations 12, 13 and 17 in 28 gives the following system of nonlinear algebraic equations: 3 2aiajakbijkr + ai˜kr − aiω2NLmir = 0 (29) The matrix form is expressed as: 3 2 [B(a)] {a} + [K] {a} − ω2NL [M] {a} = 0 (30) [B]: Nonlinear rigidity Matrix [K]: Linear rigidity Matrix [M]: Mass Matrix Explicit formulation for large-amplitude free vibrations The explicit method was initially introduced by Benamar et al
El Kadiri, R.
El Ghoulbzouri, and L.
Online since: May 2015
Authors: Menachem Bamberger, Alexander Katsman, Suzan Abd El Majid
Overaged Samples and Growth of Eutectics Mg-6Gd-3.7Nd Based Alloys
Suzan Abd El Majida, Menachem Bambergerb, Alexander Katsmanc
Technion – Israel Institute of Technology, Haifa 3200, Israel
asuze_178@hotmail.com, bmtrbam@tx.technion.ac.il, cakatsman@technion.ac.il
Keywords: Mg-Gd-Nd alloys, Precipitation, Eutectic, Microstructure, Mechanical properties
Abstract.
Xu et al.: "Hardening and microstructural reactions in high-temperature equal-channel angular pressed Mg–Nd–Gd–Zn–Zr alloy," Materials Science and Engineering A 527, 5092-5099 (2010)
King et al.: "Phase compositions in magnesium-rare earth alloys containing yttrium, gadolinium or dysprosium," Scripta Materialia 48, 475–481 (2003)
Xu et al.: "Hardening and microstructural reactions in high-temperature equal-channel angular pressed Mg–Nd–Gd–Zn–Zr alloy," Materials Science and Engineering A 527, 5092-5099 (2010)
King et al.: "Phase compositions in magnesium-rare earth alloys containing yttrium, gadolinium or dysprosium," Scripta Materialia 48, 475–481 (2003)
Online since: December 2022
Authors: Evan T. Salim, Forat Hamzah Alsultany, Abdulqader D. Faisal, Wafaa K. Khalef, M.H.A. Wahid
Sci-Mater El. 22 (2011) 1730
Abdulwahhab, All-optical investigations of copper oxide for detection devices, Journal of Ovonic Research 15(1) (2019) 53-59 [28] Yang, D, et al, Focused energy field method for the localized synthesis and direct integration of 1D nanomaterials on microelectronic devices Advanced Materials 27 (2015) 120 [29] A.
[30] AS Ibraheam, JM Rzaij, Makram A Fakhri, AW Abdulwahhab, Structural, optical and electrical investigations of Al: ZnO nanostructures as UV photodetector synthesized by spray pyrolysis technique, Materials Research Express 6(5) (2019) 055916
AL-Harbi & E.
El-Mossalamy" Growth of Zinc Oxide (ZnO) Nanorods and Their Optical Properties" Modern Applied Science 5 (2011) 87-91
Abdulwahhab, All-optical investigations of copper oxide for detection devices, Journal of Ovonic Research 15(1) (2019) 53-59 [28] Yang, D, et al, Focused energy field method for the localized synthesis and direct integration of 1D nanomaterials on microelectronic devices Advanced Materials 27 (2015) 120 [29] A.
[30] AS Ibraheam, JM Rzaij, Makram A Fakhri, AW Abdulwahhab, Structural, optical and electrical investigations of Al: ZnO nanostructures as UV photodetector synthesized by spray pyrolysis technique, Materials Research Express 6(5) (2019) 055916
AL-Harbi & E.
El-Mossalamy" Growth of Zinc Oxide (ZnO) Nanorods and Their Optical Properties" Modern Applied Science 5 (2011) 87-91
Online since: April 2022
Authors: Rajnish Kurchania, Saket S. Phadkule, Kumar Navin, Archana Nigrawal, Richard J. Ball
Aslam et al. found that 1% by weight of ZnO in the PVA matrix has shown a tensile strength of almost 45 MPa.
Jia et al. prepared PVA-SiO2 for very low silica contents in the PVA matrix and found a great enhancement in the mechanical properties of these films [42].
Al-Amiery, Properties and applications of polyvinyl alcohol, halloysite nanotubes and their nanocomposites, Molecules 20(12) (2015) 22833-22847
El Sayed, W.
El-Sayed, Influence of Cr2O3 nanoparticles on the physical properties of polyvinyl alcohol, J.
Jia et al. prepared PVA-SiO2 for very low silica contents in the PVA matrix and found a great enhancement in the mechanical properties of these films [42].
Al-Amiery, Properties and applications of polyvinyl alcohol, halloysite nanotubes and their nanocomposites, Molecules 20(12) (2015) 22833-22847
El Sayed, W.
El-Sayed, Influence of Cr2O3 nanoparticles on the physical properties of polyvinyl alcohol, J.
Online since: February 2019
Authors: J.A. Duarte Moller, Francisco Paraguay-Delgado, Javier Eliel Morales-Mendoza, Guillermo Herrera-Pérez, Nicolaza Pariona
., Carretera Antigua a Coatepec 351, El Haya, 91070 Xalapa, Veracruz, México
ajavier.morales@cimav.edu.mx, bfrancisco.paraguay@cimav.edu.mx, calberto.duarte@cimav.edu.mx, dguillermo.herrera@cimav.edu.mx, enicolaza.pariona@inecol.mx
Keywords: Zinc oxide, Zinc peroxide, nanoparticles, colloidal synthesis.
Tuning electrical and optical properties by Al and Ga doped ZnO (AZO and GZO), these semiconductors are promising materials as an alternative to replace Indium Tin Oxide (ITO) for thin-film transparent electrode applications [[] Tadatsugu Minami, Transparent conducting oxide semiconductors for transparent electrodes, Semicond.
This material is n-type semiconductor which can be doped with trivalent elements like Al, Ga, and In [[] Tetsuya Kida, Satoshi Suehiro, Keisuke Horita, Azzah Dyah Pramata, Masayoshi Yuasa, Yoichi Ishiwata, Kengo Shimanoe, Efficient solution route to transparent ZnO semiconductor films using colloidal nanocrystals, Journal of Asian Ceramic Societies, 4, (2016), 319. ].
Vijayaraghavan, Metal peroxide- polymer composites for dye degradation, Materials Science and Engineering 263, (2017), 022007. ], as inorganic agent with antimicrobial properties [[] Sameh Samir Ali, Reda Morsy, Nessma Ahmed El-Zawawy, Mervat F Fareed, Mohamed Yaser Bedaiwy, Synthesized zinc peroxide nanoparticles (ZnO2-NPs): a novel antimicrobial, anti-elastase, anti-keratinase, and anti-inflammatory approach toward polymicrobial burn wounds, International Journal of Nanomedicine 12, (2017), 6059-6073. ,[] R.
Haixin Bai et. al. reported two emission bands for the ZnO2 located at 400 nm and 474 nm which may have originated from the band edge emission and the oxygen vacancies, respectively [[] Haixin Bai, Xiaohua Liu, Green hydrothermal synthesis and photoluminescence property of ZnO2 nanoparticles, Materials Letters, 64, (2010), 341. ].
Tuning electrical and optical properties by Al and Ga doped ZnO (AZO and GZO), these semiconductors are promising materials as an alternative to replace Indium Tin Oxide (ITO) for thin-film transparent electrode applications [[] Tadatsugu Minami, Transparent conducting oxide semiconductors for transparent electrodes, Semicond.
This material is n-type semiconductor which can be doped with trivalent elements like Al, Ga, and In [[] Tetsuya Kida, Satoshi Suehiro, Keisuke Horita, Azzah Dyah Pramata, Masayoshi Yuasa, Yoichi Ishiwata, Kengo Shimanoe, Efficient solution route to transparent ZnO semiconductor films using colloidal nanocrystals, Journal of Asian Ceramic Societies, 4, (2016), 319. ].
Vijayaraghavan, Metal peroxide- polymer composites for dye degradation, Materials Science and Engineering 263, (2017), 022007. ], as inorganic agent with antimicrobial properties [[] Sameh Samir Ali, Reda Morsy, Nessma Ahmed El-Zawawy, Mervat F Fareed, Mohamed Yaser Bedaiwy, Synthesized zinc peroxide nanoparticles (ZnO2-NPs): a novel antimicrobial, anti-elastase, anti-keratinase, and anti-inflammatory approach toward polymicrobial burn wounds, International Journal of Nanomedicine 12, (2017), 6059-6073. ,[] R.
Haixin Bai et. al. reported two emission bands for the ZnO2 located at 400 nm and 474 nm which may have originated from the band edge emission and the oxygen vacancies, respectively [[] Haixin Bai, Xiaohua Liu, Green hydrothermal synthesis and photoluminescence property of ZnO2 nanoparticles, Materials Letters, 64, (2010), 341. ].
Online since: September 2024
Authors: Tamer Hamouda, Mohamad Midani, Said Awad, Ahmed Mohareb, Menna Badawy
Evaluation of Fungal Decay and Biodegradation of Thermoplastic Composites Reinforced with Date Palm Fibres
Said Awad1,a*, Tamer Hamouda2,b, Ahmed Mohareb3,c, Mohamad Midani4,d, Menna Badawy1,e
1Valorizen Research and Innovation Center, Cairo, Egypt
2Textile Research Division, National Research Centre, Cairo 12622, Egypt
3Department of Forestry and Wood Technology, Faculty of Agriculture, 21545-El-Shatby, Alexandria University, Alexandria, Egypt
4Wilson College of Textiles, NC State University, Raleigh, United States
asaid.awad@valorizen.com, btehamoud@ncsu.edu, cahmed_mohareb@yahoo.com, dmsmidani@ncsu.edu, emenna.badawy@valorizen.com
*Corresponding author during all stages of refereeing and publication
*Post-publication corresponding author
Keywords: PLA; RPVC; Date palm fibres; Biodegradable composites; Fungal resistance; Biodegradation.
These results were supported with those obtained by Bari et al. (2018) who stated that the natural fibers can be protected from fungal degradation by making them less hygroscopic and less susceptible to fungal enzymes.
The same behavior was noted by Mohareb et al. (2015) who found a considerable fungal resistant for the reinforced biopolymer composites using thermoplastic polyester polymer with flax and jute fabrics [21].
Al-Kaabi, Characterization of treated date palm tree fiber as composite reinforcement, Compos B Eng 40 (2009) 601–606. https://doi.org/10.1016/j.compositesb.2009.04.018
El-Mously, Review on cellulosic fibers extracted from date palms (Phoenix Dactylifera L.) and their applications, Cellulose 26 (2019) 2209–2232. https://doi.org/10.1007/s10570-019-02259-6
These results were supported with those obtained by Bari et al. (2018) who stated that the natural fibers can be protected from fungal degradation by making them less hygroscopic and less susceptible to fungal enzymes.
The same behavior was noted by Mohareb et al. (2015) who found a considerable fungal resistant for the reinforced biopolymer composites using thermoplastic polyester polymer with flax and jute fabrics [21].
Al-Kaabi, Characterization of treated date palm tree fiber as composite reinforcement, Compos B Eng 40 (2009) 601–606. https://doi.org/10.1016/j.compositesb.2009.04.018
El-Mously, Review on cellulosic fibers extracted from date palms (Phoenix Dactylifera L.) and their applications, Cellulose 26 (2019) 2209–2232. https://doi.org/10.1007/s10570-019-02259-6