Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 10
items per page: 25 50 75
Sort by:
Download PDF Download RIS Download Bibtex

Abstract

In the article, I try to show the world of the past as the world of games. First of all, history appears as a game – the game of the historian with his subject of study or cognition. Secondly, history itself can be conceptualised by the metaphor of the game. The history of Portugal is treated as an example of the object of historical research, which changes along with the theories applied. The act of theorising sets the limits of the known past. On the basis of selected examples from the history of Portugal in the 20th century, I try to show how the use of various research tools allows us to ask new/different questions.

Go to article

Authors and Affiliations

Karol Kasprowicz
ORCID: ORCID
Download PDF Download RIS Download Bibtex

Abstract

The Author discusses in this paper the usefulness of the Foucault's term "knowledge-rule" in the historical analysis of a discourse on everyday life of the workers in Polish kolkhozes in communist time.
Go to article

Authors and Affiliations

Ewelina Szpak
Download PDF Download RIS Download Bibtex

Abstract

The application of micro components in various fields such as biomedical, medical, automobile, electronics, automobile and aviation significantly improved. To manufacture the micro components, different techniques exist in the non-traditional machining process. In those techniques, electrochemical micromachining (ECMM) exhibits a unique machining nature, such as no tool wear, non-contact machining process, residual stress, and heat-affected zone. Hence, in this study, micro holes were fabricated on the copper work material. The sodium nitrate (NaNO₃) electrolyte is considered for the experiments. During the experiments, magnetic fields strength along with UV rays are applied to the electrolyte. The L₁₈ orthogonal array (OA) experimental design is planned with electrolyte concentration (EC), machining voltage (MV), duty cycle (DC) and electrolyte temperature (ET). The optimization techniques such as similarity to ideal solution (TOPSIS), VlseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR) and grey relational analysis (GRA) were employed to find the optimal parameter combinations. The entropy weight method is used to assess the weight of responses such as MR and OC. The optimal combination using TOPSIS, VIKOR and GRA methods shows the same results for the experimental runs 8, 9 and 7, and the best optimal parameter combination is 28 g/l EC, 11 V MV, 85 % DC and 37°C ET. Based on the analysis of variance (ANOVA) results, electrolyte concentration plays a significant role by contributing 86 % to machining performance. The second and least contributions are DC (3.86 %) and ET (1.74 %) respectively on the performance. Furthermore, scanning electron microscope (SEM) images analyses are carried out to understand the effect of magnetic field and heated electrolyte on the work material.
Go to article

Bibliography

  1. X. Wu, L. Li, N. He, M. Zhao, and Z. Zhan, “Investigation on the influence of material microstructure on cutting force and bur formation in the micro cutting of copper,” Int. J. Adv. Manuf. Technol., vol. 79, pp. 321–327, 2015, doi: 10.1007/s00170-015-6828-5.
  2.  R. Thanigaivelan, R.M. Arunachalam, and P. Drukpa, “Drilling of micro-holes on copper using electrochemical micromachining,” Int. J. Adv. Manuf. Technol. vol. 61, pp.1185–1190, 2012, doi: 10.1007/s00170-012-4093-4.
  3.  S.S. Anasane and B. Bhattacharyya, “Electrochemical Micromachining of Titanium and Its Alloys,” in Non-traditional Micromachining Processes. Materials Forming, Machining and Tribology, G. Kibria, B. Bhattacharyya, J. Davim, Eds., Springer, Cham, 2017, pp. 337–365, doi: 10.1007/978-3-319-52009-4_9.
  4.  S. Min, D.-E. Lee, A. de Grave, C.M. De Oliveira Valente, J. Lin, and D.A. Dornfeld, “Surface and edge quality variation in precision machining of single crystal and polycrystalline materials,” Proc. Inst. Mech. Eng., Part B: J. Eng. Manuf., vol. 220, no. 4, pp. 479–487, 2006, doi: 10.1243/095440506X77599.
  5.  M. Soundarrajan and R. Thanigaivelan, “Effect of coated geometrically modified tools on performance of electrochemical micromachining,” Mater. Manuf. Processes, vol. 35, no. 7, pp. 775–782, 2020, doi: 10.1080/10426914.2020.1740252.
  6.  T. Zhang, Z. Liu, and C. Xu, “Influence of size effect on burr formation in micro cutting,” Int. J. Adv. Manuf. Technol. vol. 68, pp.1911– 1917, 2013, doi: 10.1007/s00170-013-4801-8.
  7.  S. Ao, K. Li, W. Liu, X. Qin, T. Wang, Y. Dai, and Z. Luo, “Electrochemical micromachining of NiTi shape memory alloy with ethylene glycol–NaCl electrolyte containing ethanol,” J. Manuf. Process, vol. 53, pp. 223–228, 2020, doi: 10.1016/j.jmapro.2020.02.019.
  8.  M. Soundarrajan, R. Thanigaivelan, and S. Maniraj, “Investigation on Electrochemical Micromachining (EMM) of AA-MMC Using Acidified Sodium Nitrate Electrolyte,” in Advances in Industrial Automation and Smart Manufacturing, Springer 2019, pp. 367–376, doi: 10.1007/978-981-15-4739-3_30.
  9.  K. Pooranachandran, J. Deepak, P. Hariharan, and B. Mouliprasanth, “Effect of Flushing on Electrochemical Micromachining of Copper and Inconel 718 Alloy,” in Advances in Industrial Automation and Smart Manufacturing, Springer 2019, pp. 61–69, doi: 10.1007/978- 981-13-1724-8_6.
  10.  Y. Pan, Z. Hou, and N. Qu, “Improvement in accuracy of micro-dimple arrays prepared by micro-electrochemical machining with high- pressure hydrostatic electrolyte,” Int. J. Adv. Manuf. Technol., vol.100, no. 5, pp.1767–1777, 2019, doi: 10.1007/s00170-018-2822-z.
  11.  M. Baoji, P. Cheng, K. Yun, and P. Yin, “Effect of magnetic field on the electrochemical machining localization,” Int. J. Adv. Manuf. Technol., vol. 102, no. 1–4, pp. 949–956, 2019, doi: 10.1007/s00170-018-3185-1.
  12.  J. VinodKumaar, R. Thanigaivelan, and V. Dharmalingam, “A Study on the Effect of Oxalic Acid Electrolyte on Stainless Steel (316L) Through Electrochemical Micro-machining,” in Advances in Industrial Automation and Smart Manufacturing, Springer 2019, pp. 93–103 2019, doi: 10.1007/978-981-32-9425-7_8.
  13.  N. Rajan, R. Thanigaivelan, and K.G. Muthurajan, “Machinability studies on an A17075 composite with varying amounts of B4C using an induction-heated electrolyte in electrochemical machining,”Mater. Tehnol., vol. 53, no. 6, pp. 873–880, 2019.
  14.  R. Thanigaivelan, R.M. Arunachalam, M. Kumar, and B.P. Dheeraj, “Performance of electrochemical micromachining of copper through infrared heated electrolyte,” Mater. Manuf. Processes, vol. 33, no. 4, pp. 383–389, 2018, doi: 10.1080/10426914.2017.1279304.
  15.  K. Jiang et al., “Vibration-assisted wire electrochemical micromachining with a suspension of B4C particles in the electrolyte,” Int. J. Adv. Manuf. Technol., vol. 97, no. 9–12, pp. 3565–3574, 2018, doi: 10.1007/s00170-018-2190-8.
  16.  W. Liu et al., “Electrochemical micromachining on titanium using the NaCl-containing ethylene glycol electrolyte,” J. Mater. Process. Technol., vol. 255, pp. 784–794, 2018, doi: 10.1016/j.jmatprotec.2018.01.009.
  17.  A. Malik and A. Manna, “Investigation on the laser-assisted jet electrochemical machining process for improvement in machining performance,” Int. J. Adv. Manuf. Technol., vol. 96, no. 9–12, pp. 3917–3932, 2018, doi: 10.1007/s00170-018-1846-8.
  18.  H. Zhang, S. Ao, W. Liu, Z. Luo, W. Niu, and K. Guo, “Electrochemical micro-machining of high aspect ratio micro-tools using quasi-solid electrolyte,” Int. J. Adv. Manuf. Technol., vol. 91, no. 9‒12, pp. 2965–2973, 2017, doi: 10.1007/s00170-016-9900-x.
  19.  A. Speidel, J. Mitchell-Smith, D.A. Walsh, M. Hirsch, and A. Clare, “Electrolyte jet machining of titanium alloys using novel electrolyte solutions,” Procedia CIRP, vol. 42, pp. 367‒372, 2016, doi: 10.1016/j.procir.2016.02.200.
  20.  T. Sekar, M. Arularasu, and V. Sathiyamoorthy, “Investigations on the effects ofnano-fluid in ECM of die steel,” Measurement, vol. 83, pp. 38‒43. 2016, doi: 10.1016/j.measurement.2016.01.035.
  21.  A. Mohanty, G. Talla, S. Dewangan, and S. Gangopadhyay, “Microstructural investigation and multi response optimization using Fuzzy-TOPSIS during the electrochemical machining of Inconel 825,” Int. J. Precis. Technol., vol. 5, pp. 201–216, 2015, doi: 10.1504/ IJPTECH.2015.073825.
  22.  D. Singh and R.S. Shukla, “Optimization of electrochemical micromachining and electrochemical discharge machining process parameters using firefly algorithm,” Int. J. Mechatron. Manuf. Syst., vol. 9, pp.137–59, 2016, doi: 10.1504/IJMMS.2016.076169.
  23.  A. Mehrvar, A. Basti, and A. Jamali, “Optimization of electrochemical machining process parameters: Combining response surface methodology and differential evolution algorithm,” Proc. Inst. Mech. Eng., Part E: J. Process Mech. Eng., vol. 231, pp.1114–1126, 2017, doi: 10.1177/0954408916656387.
  24.  O.V. Mythreyi, P. Hariharan, and S. Gowri, “Multi-objective optimization of electrochemical micro drilling of titanium alloy,” Int. J. Precis. Technol., vol. 7, pp.188‒204, 2017, doi: 10.1504/IJPTECH.2017.090775.
  25.  M. Soundarrajan and R. Thanigaivelan, “Investigation of Electrochemical Micromachining Process Using Ultrasonic Heated Electrolyte,” in Advances in Micro and Nano Manufacturing and Surface Engineering, M. Shunmugam, M. Kanthababu, Eds., Springer, 2019, pp. 423–434, doi: 10.1007/978-981-32-9425-7_38.
  26.  M. Soundarrajan and R. Thanigaivelan, “Investigation on electrochemical micromachining (ECMM) of copper inorganic material using UV heated electrolyte,” Russ. J. Appl. Chem., vol. 91, no. 11, pp. 1805–1813, 2018, doi: 10.1134/S1070427218110101.
  27.  K. Motoyama, T. Umemoto, H. Shang, and T. Hasegawa “Effects of magnetic field and far-ultraviolet radiation on the structures of bright-rimmed clouds,” Astrophys. J., vol. 766, no 1, p. 50. 2013, doi: 10.1088/0004-637X/766/1/50.
  28.  T. Mythili and R. Thanigaivelan, “Optimization of wire EDM process parameters on Al6061/Al2O3 composite and its surface integrity studies,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 68, no. 6, pp. 403–1412, 2020, doi: 10.24425/bpasts.2020.135382.
  29.  J.R. Vinod Kumaar and R. Thanigaivelan, “Performance of magnetic field-assisted citric acid electrolyte on electrochemical micro- machining of SS 316L,” Mater. Manuf. Processes, vol. 35, no. 9, pp. 969–977, 2020, doi: 10.1080/10426914.2020.1750630.
Go to article

Authors and Affiliations

K.G. Saravanan
R. Thanigaivelan
M. Soundarrajan
Download PDF Download RIS Download Bibtex

Bibliography

[1] U. Riaz, I. Shabib, W. Haider, J. Biomed. Mater. Res. Part B. 107 (6), 1970-1996 (2019). DOI: https://doi.org/10.1002/jbm.b.34290
[2] M.K. Kulekci, Int. J. Adv. Manuf. Technol. 39 (9-10), 851-865 (2008). DOI: https://doi.org/10.1007/s00170-007-1279-2
[3] H . Furuya, N. Kogiso, S. Matunaga, K. Senda, Mater. Sci. Forum. 350, 341-348 (2000). DOI: https://doi.org/10.4028/www.scientific.net/MSF.350-351.341
[4] S.N. Mathaudhu, E.A. Nyberg, Magnesium Alloys in U.S. Military Applications: Past, Current and Future Solutions. In: S.N. Mathaudhu, A.A. Luo, N.R. Neelameggham, E.A. Nyberg, W.H. Sillekens (eds) Essential Readings in Magnesium Technology. Springer, Cham (2016). DOI: https://doi.org/10.1007/978-3-319-48099-2_10
[5] V.V. Ramalingam, P. Ramasamy, M. Das Kovukkal, G. Myilsamy, Met. Mater. Int. 26 (4), 409-430 (2020). DOI: https://doi.org/10.1007/s12540-019-00346-8
[6] K.H. Ho, S.T. Newman, Int. J. Mach. Tools Manuf. 43 (13), 1287- 1300 (2003). DOI: https://doi.org/10.1016/S0890-6955(03)00162-7
[7] M. Hourmand, A.A.D. Sarhan, M. Sayuti, Int. J. Adv. Manuf. Technol. 91 (1-4), 1023-1056, (2017). DOI: https://doi.org/10.1007/s00170-016-9671-4
[8] B. Nahak, A. Gupta, Manuf. Rev. 6 (2), 2019. DOI: https://doi.org/10.1051/mfreview/2018015
[9] S.S. Sidhu, A. Batish, S. Kumar, J. Reinf. Plast. Compos. 32 (17), 1310-1320 (2013). DOI: https://doi.org/10.1177/0731684413489366
[10] L . Arunkumar, B.K. Raghunath, Int. J. Eng. Technol. 5 (5), 4332- 4338 (2013).
[11] Sohil Parsana, Nishil Radadia, Mohak Sheth, Nisarg Sheth, Vimal Savsani, N. Eswara Prasad, T. Ramprabhu, Arch. Civ. Mech. Eng. 18 (3), 799-817 (2018). DOI: https://doi.org/10.1016/j.acme.2017.12.007
[12] S. Santosh, S. Javed Syed Ibrahim, P. Saravanamuthukumar, K. Rajkumar, K.L. Hari Krishna, Appl. Mech. Mater. 787, 406- 410 (2015). DOI: https://doi.org/10.4028/www.scientific.net/AMM.787.406
[13] M. Hourmand, A.A.D. Sarhan, S. Farahany, M. Sayuti, Int. J. Adv. Manuf. Technol. 101 (9-12), 2723-2737 (2019). DOI: https://doi.org/10.1007/s00170-018-3130-3
[14] R. Ranjith, P. Tamilselvam, T. Prakash, C. Chinnasamy, Mater. Manuf. Process. 34 (10), 1120-1128 (2019). DOI: https://doi.org/10.1080/10426914.2019.1628258
[15] S. Tripathy, D.K. Tripathy, Mach. Sci. Technol. 21 (3), 362-384 (2017). DOI: https://doi.org/10.1080/10910344.2017.1283957
[16] S. Suresh Kumar, M. Uthayakumar, S. Thirumalai Kumaran, P. Parameswaran, E. Mohandas, G. Kempulraj, B.S. Ramesh Babu, S.A. Natarajan, J. Manuf. Process. 20, 33-39 (2015). DOI: https://doi.org/10.1016/j.jmapro.2015.09.011
[17] P. Senthil, S. Vinodh, A.K. Singh, Int. J. Mach. Mach. Mater. 16 (1) 80-94 (2014). DOI: https://doi.org/10.1504/IJMMM.2014.063922
[18] K. Shunmugesh, K. Panneerselvam, Arch. Metall. Mater. 62 (3), 1803-1812 (2017). DOI: https://doi.org/10.1515/amm-2017-0273
[19] S.K. Ramuvel, S. Paramasivam, J. Mater. Res. Technol. 9 (3), 3885- 3896 (2020). DOI: https://doi.org/10.1016/j.jmrt.2020.02.015
[20] A.K. Sahu, S.S. Mahapatra, S. Chatterjee, J. Thomas, Mater. Today:. Proc. 5 (9), 19019-19026 (2018). DOI: https://doi.org/10.1016/j.matpr.2018.06.253
[21] M. Eswara Krishna, P.K. Patowari, Mater. Manuf. Processes. 29 (9), 1131-1138 (2014). DOI: https://doi.org/10.1080/10426914.2014.930887
[22] A.S. Gill, S. Kumar, Arabian J. Sci. Eng. 43 (3), 1499-1510 (2017). DOI: https://doi.org/10.1007/s13369-017-2960-x
[23] P.K Rout, B. Surekha, P.C. Jena, G.N. Arko, Mater. Today: Proc. 26 (2), 2379-2387 (2020). DOI: https://doi.org/10.1016/j.matpr.2020.02.510
[24] M. Gostimirovic, P. Kovac, M. Sekulic, B. Skoric, J. Mech. Sci. Technol. 26 (1), 173-179 (2012). DOI: https://doi.org/10.1007/s12206-011-0922-x
[25] M. Ghoreishi, C. Tabari, Mater. Manuf. Processes, 22 (7-8), 833- 841 (2007). DOI: https://doi.org/10.1080/10426910701446812
[26] M. Kiyak, B.E. Aldemir, E. Altan, Int. J. Adv. Manuf. Technol. 79 (1-4), 513-518 (2015). DOI: https://doi.org/10.1007/s00170-015-6840-9
[27] B.M. Schumacher, J. Mater. Process. Technol. 149 (1-3), 376-381 (2004). DOI: https://doi.org/10.1016/j.jmatprotec.2003.11.060
[28] L . Srinivasan, K. Mohammad Chand, T. Deepan Bharathi Kannan, P. Sathiya, S. Biju, Trans. Indian Inst. Met. 71 (2), 373-382 (2018). DOI: https://doi.org/10.1007/s12666-017-1166-y
[29] S. Tripathy, D.K. Tripathy, Eng. Sci. Technol. Int. J. 19 (1), 62-70 (2016). DOI: https://doi.org/10.1016/j.jestch.2015.07.010
Go to article

Authors and Affiliations

A. Tajdeen
1
ORCID: ORCID
A. Megalingam
1
ORCID: ORCID

  1. Bannari Amman Institute of Technology, Department of Mechanical Engineering, Sathyamangalam, Erode-638401, Tamil Nadu, India
Download PDF Download RIS Download Bibtex

Abstract

In this article the Author Irys to show in what ways popular computer games influence the historical awareness in modem culture.
Go to article

Authors and Affiliations

Radosław Bomba
Download PDF Download RIS Download Bibtex

Abstract

In the paper a new method of Random Telegraph Signal (RTS) noise identification is presented. The method is based on a standardized histogram of instantaneous noise values and processing by Gram-Charlier series. To find a device generating RTS noise by the presented method one should count the number of significant coefficients of the Gram-Charlier series. This would allow to recognize the type of noise. There is always one (first) significant coefficient (c0) representing Gaussian noise. If additional coefficients cr (where r > 0) appear it means that RTS noise (two-level as well as multiple-level) is detected. The coefficient representing the Gaussian component always has the highest value of all. The application of this method will be presented on the example of four devices, each with different noise (pure Gaussian noise signal, noise signal with two-level RTS noise, noise signal with three-level RTS noise and noise signal with not precisely visible occurrence of RTS noise).

Go to article

Authors and Affiliations

Barbara Stawarz-Graczyk
Dariusz Dokupil
Paweł Flisikowski
Download PDF Download RIS Download Bibtex

Abstract

MDAP-2 is a new antibacterial peptide with a unique structure that was isolated from house- flies. However, its biological characteristics and antibacterial mechanisms against bacteria are still poorly understood. To study the biological characteristics, antibacterial activity, hemolytic activi- ty, cytotoxicity to mammalian cells, and the secondary structure of MDAP-2 were detected; the results showed that MDAP-2 displayed high antibacterial activity against all of the tested Gram-negative bacteria. MDAP-2 had lower hemolytic activity to rabbit red blood cells; only 3.4% hemolytic activity was observed at a concentration of 800μg/ml. MDAP-2 also had lower cytotoxicity to mammalian cells; IC50 values for HEK-293 cells, VERO cells, and IPEC-J2 cells were greater than 1000 μg/ml. The circular dichroism (CD) spectra showed that the peptide most- ly has α-helical properties and some β-fold structure in water and in membrane-like conditions. MDAP-2 is therefore a promising antibacterial agent against Gram-negative bacteria. To deter- mine the antibacterial mechanism(s) of action, fluorescent probes, flow cytometry, and transmis- sion electron microscopy (TEM) were used to study the effects of MDAP-2 on membrane perme- ability, polarization ability, and integrity of Gram-negative bacteria. The results indicated that the peptide caused membrane depolarization, increased membrane permeability, and destroyed membrane integrity. In conclusion, MDAP-2 is a broad-spectrum, lower hemolytic activity, and lower cytotoxicity antibacterial peptide, which is mainly effective on Gram-negative bacteria. It exerts its antimicrobial effects by causing bacterial cytoplasm membrane depolarization, increas- ing cell membrane permeability and disturbing the membrane integrity of Gram-negative bacte- ria. MDAP-2 may offer a new strategy to for defense against Gram-negative bacteria.

Go to article

Authors and Affiliations

Z. Pei
X. Ying
Y. Tang
L. Liu
H. Zhang
S. Liu
D. Zhang
K. Wang
L. Kong
Y. Gao
H. Ma
Download PDF Download RIS Download Bibtex

Abstract

Mineral markets, in spite of many common features with other goods markets, are distinctive. Their functioning sometimes deviates from the rules of the free market. This feature results from the specificity of acquiring the good being an object of trade. In general, changes in the supply of strategic raw materials are indicated earlier (characterized by a lengthy investment cycle from deposit reconnaissance to mining development), develop slowly, andare inelastic. Demand for common mineral raw materials often has a clear and economic character. However, mineral markets as well as markets of other goods have a common feature - the fact that both are a place where an incessant game is being played. In general, two types of strategic behaviours are distinguished: competition or cooperation. This paper recalls an existing model known as the oil market game. Based on a three-entity market of aggregate producers, an attempt has been made to model entrepreneurs' behaviour. The analysis applies n-person game theory. Game theory enables the evaluation of diverse potential coalitions forming. Possible strategies of activity coming from the prospect of cooperation (or its omission) are presented. Expected payoffs are estimated for possible alliances. Proposals for the division of the payoffs among the participants forming the coalition are also suggested.

Go to article

Authors and Affiliations

Mariusz Krzak
Download PDF Download RIS Download Bibtex

Abstract

According to a widespread view, reviews in science are an instrument for the selection of ideas and people. The article analyzes the gatekeeping role of habilitation proceedings in Polish sociology, taking into account three main areas: (1) the power held in the field of sociology by individual and institutional selectors, (2) statistics on the results of selection, and (3) the fate of academics rejected in the gatekeeping process. It has been found that (1) in Polish sociology there are leading institutions that play the largest role in awarding habilitation degrees, but unlike in other disciplines, there is no phenomenon of domination in the field of review by specific scholars. (2) In the proceedings from 2013–2019, 12.5% of the proceedings ended with a refusal to grant the degree. In the set, no proceedings with a controversial outcome were found (e.g., conferring a degree with a preponderance of negative reviews or vice versa). In the examination of the review results, no trend of systematic gender discrimination was found. (3) 32% of those who were denied a degree left the scientific community, while 63% are still working at the same university as before the denial.
Go to article

Authors and Affiliations

Łukasz Remisiewicz
1
ORCID: ORCID

  1. Uniwersytet Gdański, Instytut Socjologii

This page uses 'cookies'. Learn more