Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 5
items per page: 25 50 75
Sort by:
Download PDF Download RIS Download Bibtex

Bibliography

  1.  Ł. Czekierda, F. Malawski, R. Straś, K. Zieliński, and S. Zieliński, “Leveraging cloud environment flexibility to smoothen the transition to remote teaching during covid-19 pandemic – a case study,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 69, no. 4, p. e137934, 2021, doi: 10.24425/ bpasts.2021.137934.
  2.  A. Gryszczyńska, “The impact of the covid-19 pandemic on cybercrime,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 69, no. 4, p. e137933, 2021, doi: 10.24425/bpasts.2021.137933.
  3.  W. Jamroga, D. Mestel, P. Roenne, P. Ryan, and M. Skrobot, “A survey of requirements for covid-19 mitigation strategies,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 69, no. 4, p. e137724, 2021, doi: 10.24425/bpasts.2021.137724.
  4.  M. Gruda and M. Kędziora, “Analyzing and improving tools for supporting fighting against covid-19 based on prediction models and contact tracing,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 69, no. 4, p. e137414, 2021, doi: 10.24425/bpasts.2021.137414.
  5.  A. Bobowski, J. Cichoń, and M. Kutyłowski, “Extensions for apple-google exposure notification mechanism,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 69, no. 4, p. e137126, 2021, doi: 10.24425/bpasts.2021.137126.
  6.  M. Kozielski et al., “Enhancement of covid-19 symptom-based screening with quality-based classifier optimisation,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 69, no. 4, p. e137349, 2021, doi: 10.24425/bpasts.2021.137349.
  7.  M. Paciorek, D. Poklewski-Koziełł, K. Racoń-Leja, A. Byrski, M. Gyurkovich, and W. Turek, “Microscopic simulation of pedestrian traffic in urban environment under epidemic conditions,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 69, no. 4, p. e137725, 2021, doi: 10.24425/ bpasts.2021.137725.
  8.  M. Łoś, M. Woźniak, I. Muga, and M. Paszyński, “Threedimensional simulations of the airborne covid-19 pathogens using the advection- diffusion model and alternating-directions implicit solver,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 69, no. 4, p. e137125, 2021, doi: 10.24425/ bpasts.2021.137125.
Go to article

Authors and Affiliations

Aneta Afelt
1
Aleksander Byrski
2
ORCID: ORCID
Victor Calo
3
Tyll Krüger
4
Lech Madeyski
4
ORCID: ORCID
Wojciech Penczek
5

  1. Institut de Recherche pour le Développement, Montpellier, France
  2. AGH University of Science and Technology, Krakow, Poland
  3. Curtin University, Perth, Australia
  4. Wroclaw University of Science and Technology, Wroclaw, Poland
  5. Institute of Computer Science, PAS, Warsaw, Poland
Download PDF Download RIS Download Bibtex

Abstract

The article presents the study results of electropulse grinding of amber in aqueous and alcoholic media at different amounts of supplied energy. Description of the electropulse grinding laboratory installation, the mechanism of the destruction process of amber particles and methods of statistical processing of experimental data are given. It was established that alcohol medium has a greater impact on the efficiency of crushing than water. Thus, under the same conditions of energy supply, in the aqueous medium the weighted average particle size of amber was 601:6±688:9 μm, and in an alcohol medium – 368:0±269:6 μm. In an aqueous medium, the particle size decreased to 1/13.6 of raw sample, and in an alcoholic medium to 1/22.3 of raw sample compared to the initial size of raw amber. We found that in the aqueous medium the ratio of large to small fractions is mainly the same with the coefficient of alignment of particles with a size of 1.09. In an alcoholic medium, this ratio significantly differs, with the coefficient of alignment of amber particles of a size of 1.67 with the amount of supplied energy of 125 kJ.
Go to article

Bibliography

[1] Y.M. Wang, M.X. Yang, and T. You. Latest progress of pressed amber. Journal of Gems & Gemmology, 14(1):38–45, 2012.
[2] N.V. Martynov, V.N. Dobromirov, and D.V. Avramov. Electro-hydraulic disintegration technology for diamond-bearing rocks. Ore Dressing, 2020(1):8–14. 2020. doi: 10.17580/or.2020.01.02 (in Russian).
[3] U. Andres. Development and prospects of mineral liberation by electrical pulses. International Journal of Mineral Processing, 97(1-4):31–38. 2010. doi: 10.1016/j.minpro.2010.07.004.
[4] D. Yan, D. Bian, J. Zhao, and S. Niu. Study of the electrical characteristics, shock-wave pressure characteristics, and attenuation law based on pulse discharge in water. Shock and Vibration, 2016:6412309, 2016. doi: 10.1155/2016/6412309.
[5] T. Krytska and T. Lytvynenko. Electropulse crushing of high-purity crystalline silicon in an aqueous medium. Metallurgy, 1(35):54–57, 2016. (in Ukrainian).
[6] N. Martynov, D.Avramov, G.Kozlov, and M. Pushkarev. Pulsed electric discharge in an aqueous medium for processing raw amber. Journal of Physics: Conference Series, 1614(1):012060, 2020. doi: 10.1088/1742-6596/1614/1/012060.
[7] X. Zhang, B. Lin, C. Zhu, Y. Wang, C. Guo, and J. Kong. Improvement of the electrical disintegration of coal sample with different concentrations of NaCl solution. Fuel, 222:695–704, 2018. doi: 10.1016/j.fuel.2018.02.151.
[8] A.P. Smirnov, V.G. Zhekul, E.I. Taftai, O.V. Khvoshchan, and I. S. Shvets. Effect of parameters of liquids on amplitudes of pressure waves generated by electric discharge. Surface Engineering and Applied Electrochemistry, 55(1):84–88, 2019. doi: 10.3103/S1068375519010149.
[9] V. Chornyi, T. Mysiura, N. Popova, and V. Zavialov. Solvent selection for extraction of target components from amber. Journal of Chemistry and Technologies, 29(1):92–99, 2020, doi: 10.15421/082106. (in Ukrainian).
[10] P.A. Kouzov. Fundamentals of disperse composition analysis of industrial dusts and ground materials. Chemistry, 1987. (in Russian).
[11] A.R. Demidov and S.E. Chirikov. Grinding methods and methods for evaluating their effectiveness. Report of Central Institute of Scientific and Technical Information and Technical and Economic Research of the Committee of Procurements of the USSR, Moscow, 1969. (in Russian).
[12] G.A. Egorov, V.T. Linnichenko, E.M. Melnikov, and T. P. Petrenko. Workshop on technology of flour, cereals and compound feed. Agropromizdat, Moscow, 1991. (in Russian).
[13] B.P. Demidovich and I.A. Maron. Fundamentals of Computational Mathematics. Science, Moscow, 1970. (in Russian).
[14] H. M. Bartenev. The statistical nature of strength and discrete levels of strength and durability of polymers. In: Strength and degradation mechanism of polymers, pages 243–261. Chemisty, 1984. (in Russian).
[15] W. Zuo, X. Li, F. Shi, R. Deng,W. Yin, B. Guo, and J. Ku. Effect of high voltage pulse treatment on the surface chemistry and floatability of chalcopyrite and pyrite. Minerals Engineering, 147:106170, 2020. doi: 10.1016/j.mineng.2019.106170.
Go to article

Authors and Affiliations

Valentyn Chornyi
1
ORCID: ORCID
Yevgen Kharchenko
1
ORCID: ORCID
Taras Mysiura
1
ORCID: ORCID
Nataliia Popova
1
ORCID: ORCID
Volodymyr Zavialov
1
ORCID: ORCID

  1. Institute of Food Technologies, National University of Food Technologies, Kyiv, Ukraine.
Download PDF Download RIS Download Bibtex

Abstract

Fused Deposition Modeling (FDM) components are commonly used for either prototypes or end products, mostly made of polymers. Polymers offer low frictional resistance to wear, so most of the engineering polymers find their increased usage in day-to-day industrial as well as domestic needs. The influence of many process controlling elements on the mechanical part properties is already being studied extensively, which demands the study of tribological characteristics like friction and wear rate under varying normal load (NL), sliding velocities (V) and part building orientations (PBO). The results showed a significant impact of the PBO and NL at various V on the tribological properties under various significant suitable sliding circumstances. Cracks were formed in the cylindrical tribometer specimens of Acrylonitrile butadiene styrene (ABS) fabricated at low PBO when operated at high NL, and V. Vertical PBO to the FDM building platform in the layers form where a number of inter-layers can bear maximum NL at higher values of V resulted in uniform wear and low frictions. Friction was noticed very low at minimum NL when PBO was 0° (horizontal) and 90° (vertical), but increased at high NL between PBO of 15° to 60°. The FDM parts improved compared to those from conventional manufacturing processes.
Go to article

Bibliography

[1] D. Ahn, J.-H. Kweon, S. Kwon, J. Song, and S. Lee. Representation of surface roughness in fused deposition modeling. Journal of Materials Processing Technology, 209(15-16):5593–5600, 2009. doi: 10.1016/j.jmatprotec.2009.05.016.
[2] C.K. Chua, S.H. Teh, and R.K.L. Gay. Rapid prototyping versus virtual prototyping in product design and manufacturing. The International Journal of Advanced Manufacturing Technology, 15(8):597–603, 1999. doi: 10.1007/s001700050107.
[3] W. Zeng, F. Lin, T. Shi, R. Zhang, Y. Nian, J. Ruan, and T Zhou. Fused deposition modelling of an auricle framework for microtia reconstruction based on CT images. Rapid Prototyping Journal, 15(5):280–284, 2008. doi: 10.1108/13552540810907947.
[4] S.H. Choi and H.H. Cheung. Multi-material virtual prototyping for product development and biomedical engineering. Computers in Industry, 58(5):438–452, 2007. doi: 10.1016/j.compind.2006.09.002.
[5] E.C. Santos, M. Shiomi, K. Osakada, and T. Laoui. Rapid manufacturing of metal components by laser forming. International Journal of Machine Tools and Manufacture, 46(12-13):1459–1468, 2006. doi: 10.1016/j.ijmachtools.2005.09.005.
[6] N. Oxman. Variable property rapid prototyping. Virtual and Physical Prototyping, 6(1):3–31, 2011. doi: 10.1080/17452759.2011.558588.
[7] A. Bellini, L. Shor, and S.I. Guceri. New developments in fused deposition modeling of ceramics. Rapid Prototyping Journal, 11(4):214–220, 2005. doi: 10.1108/13552540510612901.
[8] K.D. Dearn, T.J. Hoskins, D.G. Petrov, S.C. Reynolds, and R. Banks. Applications of dry film lubricants for polymer gears. Wear, 298-299:99–108, 2013. doi: 10.1016/j.wear.2012.11.003.
[9] S.E. Franklin. Wear experiments with selected engineering polymers and polymer composites under dry reciprocating sliding conditions. Wear, 251(1-12):1591–1598, 2001. doi: 10.1016/S0043-1648(01)00795-5.
[10] P.V. Vasconcelos, F.J. Lino, A.M. Baptista, and R.J. Neto. Tribological behaviour of epoxy based composites for rapid tooling. Wear, 260(1-2):30–39, 2006. doi: 10.1016/j.wear.2004.12.030.
[11] B.-B. Jia, T.-S. Li, X.-J. Liu, and P.-H. Cong. Tribological behaviors of several polymer–polymer sliding combinations under dry friction and oil-lubricated conditions. Wear, 262(11-12):1353–1359, 2007. doi: 10.1016/j.wear.2007.01.011.
[12] A. Equbal, A.K. Sood, V. Toppo, R.K. Ohdar, and S.S. Mahapatra. Prediction and analysis of sliding wear performance of fused deposition modelling-processed ABS plastic parts. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 224(12):1261–1271, 2010. doi: 10.1243/13506501JET835.
[13] A. Pereira, J. Pérez, J. Diéguez, G. Peláez, and J. Ares. Design and manufacture of casting pattern plates by rapid tooling. Archives of Material Science, 29(1-2):63–67, 2008.
[14] Q. Liu, M.C. Leu, and S.M. Schmitt. Rapid prototyping in dentistry: technology and application. The International Journal of Advanced Manufacturing Technology, 29(3):317–335, 2006. doi: 10.1007/s00170-005-2523-2.
[15] T. Brajlih, B. Valentan, J. Balic, and I. Drstvensek. Speed and accuracy evaluation of additive manufacturing machines. Rapid Prototyping Journal, 17(1):64–75, 2011. doi: 10.1108/13552541111098644.
[16] Y. Yan, S. Li, R. Zhang, F. Lin, R. Wu, Q. Lu, Z. Xiong, and X. Wang. Rapid prototyping and manufacturing technology: principle, representative technics, applications, and development trends. Tsinghua Science and Technology, 14(S1):1–12, 2009. doi: 10.1016/S1007-0214(09)70059-8.
[17] P. Rochus, J.-Y. Plesseria, M.Van Elsen, J.-P. Kruth, R. Carrus, and T. Dormal. New applications of rapid prototyping and rapid manufacturing (RP/RM) technologies for space instrumentation. Acta Astronautica, 61(1-6):352–359, 2007. doi: 10.1016/j.actaastro.2007.01.004.
[18] Z. Rymuza, Z. Kusznierewicz, T. Solarski, M. Kwacz, S.A. Chizhik, and A.V. Goldade. Static friction and adhesion in polymer–polymer microbearings. Wear, 238(1):56–69, 2000. doi: 10.1016/S0043-1648(99)00341-5.
[19] M.M. Hanon, Y. Alshammas, and L. Zsidai. Effect of print orientation and bronze existence on tribological and mechanical properties of 3D-printed bronze/PLA composite. The International Journal of Advanced Manufacturing Technology, 108:553–570, 2020. doi: 10.1007/s00170-020-05391-x.
[20] M.N.M. Norani M.I.H.C. Abdullah, M.F.B. Abdollah, H. Amiruddin, F.R. Ramli, and N. Tamaldin. Tribological analysis of a 3D-printed internal triangular flip ABS pin during running-in stage. Jurnal Tribologi, 27:42–56, 2020.
[21] G.S. Balan, V.S. Kumar, S. Rajaram, and M. Ravichandran. Investigation on water absorption and wear characteristics of waste plastics and seashell powder reinforced polymer composite. Jurnal Tribologi, 27:57–70, 2020.
[22] M. Yunus and M.S. Alsoufi. Effect of raster inclinations and part positions on mechanical properties, surface roughness and manufacturing price of printed parts produced by fused deposition method. Journal of Mechanical Engineering and Sciences, 14(4):7416–7423, 2020. doi: 10.15282/jmes.14.4.2020.10.0584.
[23] M. Yunus and M.S. Alsoufi. Experimental investigations into the mechanical, tribological, and corrosion properties of hybrid polymer matrix composites comprising ceramic reinforcement for biomedical applications. International Journal of Biomaterials, 2018:ID 9283291, 2018. doi: 10.1155/2018/9283291.
[24] P.K. Gurrala and S.P. Regalla. Friction and wear behavior of ABS polymer parts made by fused deposition modeling (FDM). Technology Letters, 1(12):13–17, 2014.
Go to article

Authors and Affiliations

Turki Alamro
1
ORCID: ORCID
Mohammed Yunus
1
ORCID: ORCID
Rami Alfattani
1
ORCID: ORCID
Ibrahim A. Alnaser
2

  1. Department of Mechanical Engineering, Umm Al-Qura University, Makkah City, Saudi Arabia.
  2. Mechanical Engineering Department, King Saud University, Riyadh, Saudi Arabia.
Download PDF Download RIS Download Bibtex

Abstract

The preservation of historical documents is a task that requires a multidisciplinary team. Mechanical engineering can make valuable contributions. Historical documents made of paper have unique characteristics that must be considered for their preservation and exhibition. Specially designed encasements have emerged as a solution to meet these requirements. In the present research, a comparative design study was carried out. The study comprises identifying the main functions of the encasements. Subsequently, it is analyzed how the capsules that appear in the literature have solved these functions. With the information obtained, three new encasements were designed for historical documents in Mexico. From the results and design experiences, some insights and design principles were obtained; these can be universally applied.
Go to article

Bibliography


[1] Instituto Nacional de Antropología e Historia. Web page of INAH. 1 October 2020. [On line]. Available: https://www.inah.gob.mx/.
[2] G. d. México. Archivo General de la Nación. [On line]. Available: https://www.gob.mx/agn. [Last acces: 10 nov 2020].
[3] W.K. Wilson and B.W. Forshee. Preservation of documents by lamination. Washington: National Bureau of Standards, 1959.
[4] A. Bansal, V. Kumari, A. Kumar and M. Singh. Securing the future of information: digitisation and preservation of documents in e-format. DESIDOC Bulletin of Information Technology, 25(1):19–26, 2005.
[5] F. Zhao. On choosing the digital document’s file format for long-term preservation. In IEEE 3rd International Conference on Communication Software and Networks, pages 370–372, Xi’an, China, 27–27 May, 2011. doi: 10.1109/ICCSN.2011.6013850.
[6] E.F. Hansen. Protection of objects from environmental deterioration by reducing their exposure to oxygen. In: S. Maekawa, editor, Oxygen-Free Museum Cases, chapter 2, pages 7–16. The Getty Conservation Institute, 1998.
[7] N. Valentín. Preservation of historic materials by using inert gases for biodeterioration control. In S. Maekawa, editor, Oxygen-Free Museum Cases, chapter 3, pages 17–30. The Getty Conservation Institute, 1998.
[8] R.H. Allen, R.J. Fijol, S. Szykman and R.D. Sriram. Representing the charters of freedom in a design repository: A case of study. In Proceedings of DETC 2001 ASME Design Engineering Technical Conference and Computers and Information in Engineering Conference, pages 593–599. Pittsburgh, PA, USA, 9-12 September, 2001. doi: 10.1115/DETC2001/CIE-21292.
[9] N. Stolow. Conservation and Exhibitions: Packing, Transport, Storage, and Environmental Considerations. Butterworth-Heinemann, London, 1987.
[10] N.Y. Iskander. Controlled-environment cases for the Royal Mummy Collection. In: S. Maekawa, editor, Oxygen-Free Museum Cases, chapter 5, pages 47–52. The Getty Conservation Institute, 1998.
[11] H. Kishan and S. Maekawa. Preservation of the original documents of the Constitution of India. In: S. Maekawa, editor, Oxygen-Free Museum Cases, chapter 6, pages 53–58. The Getty Conservation Institute, 1998.
[12] F.G. France and M. Toth. The Waldseemüller Map – A gift of Germany to the world. The Cartographic Journal, 50(3):286–292, 2013. doi: 10.1179/1743277413Y.0000000060.
[13] M.J. French and A.C. Ramirez-Reivich. Towards a comparative study of quarter-turn pneumatic valve actuators. Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 210(6):543–552, 1996. doi: 10.1243/PIME_PROC_1996_210_153_02.
[14] G. Pahl, W. Beitz, J. Feldhusen and K.-H. Grote. Engineering Design. A Systematic Approach, 3rd edition. Springer, 2007.
[15] R.B. Stone and K.L.Wood. Development of a functional basis for design. Journal of Mechanical Design, 122(4):359–370, 2000. doi: 10.1115/1.1289637.
[16] B. Tyl, J. Legardeur, D. Millet, and F. Vallet. A comparative study of ideation mechanisms used in eco-innovation tools. Journal of Engineering Design, 25(10-12):325–345, 2014. doi: 10.1080/09544828.2014.992772.
[17] C.A. Mattson and A.E. Wood. Nine principles for design for the developing world as derived from the engineering literature. Journal of Mechanical Design, 135(12):121403, 2014. doi: 10.1115/1.4027984.
Go to article

Authors and Affiliations

Alejandro C. Ramirez-Reivich
1
Ma. Pilar Corona-Lira
1
Diego A. Zamora-Garcia
1
Anahí Velazquez-Silva
1
Vicente Borja
1

  1. School of Engineering, National Autonomous University of Mexico, Mexico City, Mexico

This page uses 'cookies'. Learn more