Log in

Relevant bibliographies by topics / Permanent use of earth / Journal articles

To see the other types of publications on this topic, follow the link: Permanent use of earth.

Journal articles on the topic 'Permanent use of earth'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Permanent use of earth.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Маiorov, A. A., and A. R. Safin. "The possibility of using permanent magnets without rare earth elements in electric motors." Power engineering: research, equipment, technology 24, no. 4 (2022): 116–30. http://dx.doi.org/10.30724/1998-9903-2022-24-4-116-130.

Full text

Abstract:

THE PURPOSE. The use of rare earth permanent magnets in electric motors has become commonplace. The use of rare earth magnets in electric motors, such as neodymium (NdFeB), gives a significant increase in the characteristics of the electric motor. The prices of permanent magnet motors made of rare earth elements are highly dependent on the prices of magnets. So in 2012, prices for rare earth magnets increased sharply, which in turn led to a sharp increase in the cost of electric motors. The difficult situation in the world, as well as a possible new price hike for rare earth magnets, is worryi

APA, Harvard, Vancouver, ISO, and other styles

2

Oumarou, Halilou Almou, Harouna Tahirou Hima, Jean Michel Berenger, et al. "Bed bug control with various dusts: Efficacy comparison between silicon dioxide, diatomaceous earth, and Sommières earth." Parasite 31 (2024): 41. http://dx.doi.org/10.1051/parasite/2024040.

Full text

Abstract:

Bed bugs are considered a major public health problem in industrialized countries. Usually, bed bug infestations are managed using a combination of physical and chemical methods. In recent years, new strategies for bed bug control have emerged, particularly the use of dusts like diatomaceous earth and silicon dioxide. However, in Europe, the use of silicon dioxide is restricted to professional, while diatomaceous earth can be harmful to the lungs. This study aimed to assess bed bug mortality rates associated with Sommières earth, green clay, talc, and sodium bicarbonate compared to silicon dio

APA, Harvard, Vancouver, ISO, and other styles

3

Du, Xiaoyue, and T. E. Graedel. "Global Rare Earth In-Use Stocks in NdFeB Permanent Magnets." Journal of Industrial Ecology 15, no. 6 (2011): 836–43. http://dx.doi.org/10.1111/j.1530-9290.2011.00362.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Porcayo-Calderon, J., J. J. Ramos-Hernandez, E. Porcayo-Palafox, et al. "Sustainable Development of Corrosion Inhibitors from Electronic Scrap: Synthesis and Electrochemical Performance." Advances in Materials Science and Engineering 2019 (December 6, 2019): 1–14. http://dx.doi.org/10.1155/2019/6753658.

Full text

Abstract:

Due to its high content of rare earths, the use of permanent magnets can be a sustainable alternative for the synthesis of environmentally friendly corrosion inhibitors in order to replace the use of highly toxic inhibitors, as well as the use of rare earth salts of high purity and high cost. In this study, the recovery of rare earths from permanent magnet wastes and their synthesis to chloride salts were carried out. Rare earth chlorides were evaluated as corrosion inhibitors by electrochemical techniques on API X70 steel in a 3.5% NaCl solution. Both anodic and cathodic polarization curves w

APA, Harvard, Vancouver, ISO, and other styles

5

Heim, James W., and Randy L. Vander Wal. "NdFeB Permanent Magnet Uses, Projected Growth Rates and Nd Plus Dy Demands across End-Use Sectors through 2050: A Review." Minerals 13, no. 10 (2023): 1274. http://dx.doi.org/10.3390/min13101274.

Full text

Abstract:

Rare earth element (REE) permanent magnets (NdFeB) are a critical element in a vast and growing number of industrial applications. In consumer electronics, a broad category encompassing computer, CD, and DVD hard drives, in addition to the ubiquitous cell phones, the nominal NdFeB magnet content may be small, but the global market share for this sector accounts for almost 30% of NdFeB demand, due to a large and continually increasing consumer base. It is estimated that wind turbines that primarily employ permanent magnets will add roughly 110 GW annually of on- and off-shore capability over th

APA, Harvard, Vancouver, ISO, and other styles

6

Rassõlkin, A., A. Kallaste, S. Orlova, L. Gevorkov, T. Vaimann, and A. Belahcen. "Re-Use and Recycling of Different Electrical Machines." Latvian Journal of Physics and Technical Sciences 55, no. 4 (2018): 13–23. http://dx.doi.org/10.2478/lpts-2018-0025.

Full text

Abstract:

Abstract The paper discusses the current developments in the recycling of electrical machines. The main attention is devoted to three types of motors: synchronous reluctance motor, permanent magnet assisted synchronous reluctance motor, and induction motor. Base materials of such electrical machines are also described in the paper. Rare-earth permanent magnets used in electrical machines are review separately. Moreover, the paper considers the features of the disassembly and recycling options.

APA, Harvard, Vancouver, ISO, and other styles

7

Chang, Sungwoo, Noboru Niguchi, Je-Hoon Lee, and Katsuhiro Hirata. "Improvement of Torque Performance and Energy Density of PM-Type Vernier Motor Utilizing Saddle Coil and Salient Pole." Applied Sciences 11, no. 6 (2021): 2818. http://dx.doi.org/10.3390/app11062818.

Full text

Abstract:

In electric motors, the use of rare-earth magnets has been increasing rapidly. A stronger magnet force of the magnet enables the motor’s higher performance, resulting in the most high-performance motors generally using rare-earth magnets. However, these magnets have two crucial disadvantages: the potential restrictions on the supply of rare-earth magnetic materials and the sharp fluctuation in price. Thus, many recent researches focus on developing high-performance electric motors and reducing the use of critical rare-earth magnets. By increasing the torque density of the motor, we can reduce

APA, Harvard, Vancouver, ISO, and other styles

8

Si, Guo Lei, Feng Yu Yang, Wen Jie Wang, and Yu Hui Liu. "Study on Relief Valve with Permanent Magnetic Spring." Advanced Materials Research 328-330 (September 2011): 224–27. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.224.

Full text

Abstract:

Based on mechanical phenomena between two fixed magnetic, when the distance is short, the electromagnetic force are linear,therefore,we can make full use of the characters and make it to be permanent magnetic spring replacing the mechanical spring in hydraulic relief valves. Through the use of the Rare-earth magnetic springs in relief valves, we find it is more sensitive to load. Besides these, the rare-earth magnetic springs have a long life and high temperature resistance without failure by fatigue. So the study and design of permanent magnetic spring type relief valve have large application

APA, Harvard, Vancouver, ISO, and other styles

9

Klemettinen, Anna, Zbigniew Adamski, Ida Chojnacka, Anna Leśniewicz, and Leszek Rycerz. "Recovery of Rare Earth Elements from the Leaching Solutions of Spent NdFeB Permanent Magnets by Selective Precipitation of Rare Earth Oxalates." Minerals 13, no. 7 (2023): 846. http://dx.doi.org/10.3390/min13070846.

Full text

Abstract:

After mechanical pre-treatment, the typical hydrometallurgical route of NdFeB magnet recycling starts with leaching in acidic solutions. However, due to the high concentration of iron ions in the leaching solution, the selective recovery of rare earths from the solution is challenging. In our work, the selective precipitation of rare earth oxalates as a potential separation method was proposed. The precipitation of neodymium oxalate was first tested on model solutions, which was then followed by experimental tests carried out on real solutions after the leaching of NdFeB magnets. The recovery

APA, Harvard, Vancouver, ISO, and other styles

10

Dmitrievskii, Vladimir, Vadim Kazakbaev, Vladimir Prakht, and Alecksey Anuchin. "Permanent Magnet Assisted Synchronous Reluctance Motor for Subway Trains." World Electric Vehicle Journal 15, no. 9 (2024): 417. http://dx.doi.org/10.3390/wevj15090417.

Full text

Abstract:

With the growing demand and projected shortage of rare earth elements in the near future, the urgent task of developing energy-efficient electrical equipment with less dependence on rare earth magnets has become paramount. The use of permanent magnet-assisted synchronous reluctance motors (PMaSynRMs), which reduce the consumption of rare earth magnets, can help solve this problem. This article presents a theoretical analysis of the characteristics of PMaSynRM in a subway train drive. Options with rare earth and ferrite magnets are considered. Optimization of the motor designs considering the t

APA, Harvard, Vancouver, ISO, and other styles

11

Khoroshylov, S., and E. Lapkhanov. "Time-Periodic Spacecraft Attitude Control with the Use of Slewing Permanent Magnets." Science and Innovation 18, no. 5 (2022): 38–48. http://dx.doi.org/10.15407/scine18.05.038.

Full text

Abstract:

Introduction. Electromagnetic actuators are widely used in spacecraft (SC) attitude control systems. These actuators can be modified by using slewing permanent magnets (ASPM) as sources of torque instead of electromagnets. These modified devices consume less onboard electricity for SC attitude control than the conventional ones.Problem Statement. An algorithm for attitude stabilization of a SC using ASPM was proposed in previous studies, where the pole placement technique and pulse-width modulation (PWM) were used to design the controller. However, this approach does not allow the designers to

APA, Harvard, Vancouver, ISO, and other styles

12

Lee, Oliver Mitchell, and Mohammadali Abbasian. "Reducing Rare-Earth Magnet Reliance in Modern Traction Electric Machines." Energies 18, no. 9 (2025): 2274. https://doi.org/10.3390/en18092274.

Full text

Abstract:

Currently, electric machines predominantly rely on costly rare-earth NdFeB magnets, which pose both economic and environmental challenges due to rising demand. This research explores recent advancements in machine topologies and magnetic materials to identify and assess promising solutions to this issue. The study investigates two alternative machine topologies to the conventional permanent magnet synchronous machine (PMSM): the permanent magnet-assisted synchronous reluctance machine (PMaSynRM), which reduces magnet usage, and the wound-field synchronous machine (WFSM), which eliminates magne

APA, Harvard, Vancouver, ISO, and other styles

13

Fedorovych, Volodymyr. "THE RIGHT TO PERMANENT USE OF LAND PLOTS IN UKRAINE: THE ISSUES OF LEGAL REGULATION AND IMPLEMENTATION PRACTICES." Visnyk of the Lviv University. Series Law, no. 75 (November 10, 2022): 129–38. http://dx.doi.org/10.30970/vla.2022.75.129.

Full text

Abstract:

The right to permanent use of land plots in Ukraine is characterized as one of the main legal forms of land use. It is emphasized that the legislative consolidation of modern, market rights to land did not lead to a complete rejection of all Soviet forms of land use, including the right to permanent use of land plots. The genesis of legal regulation of the land plots use on the ground of the right to permanent use in the Ukrainian land legislation is clarified, on the basis of what a conclusion concerning the tendency to abolishment of the institution of the right to permanent land use in the

APA, Harvard, Vancouver, ISO, and other styles

14

Inman, Grace, Denis Prodius, and Ikenna C. Nlebedim. "Recent advances in acid-free dissolution and separation of rare earth elements from the magnet waste." Clean Technologies and Recycling 1, no. 2 (2021): 112–23. http://dx.doi.org/10.3934/ctr.2021006.

Full text

Abstract:

<abstract> <p>The availability of REEs is limiting the successful deployment of some environmentally friendly and energy-efficient technologies. In 2019, the U.S. generated more than 15.25 billion pounds of e-waste. Only ~15% of it was handled, leaving ~13 billion pounds of e-waste as potential pollutants. Of the 15% collected, the lack of robust technology limited REE recovery for re-use. Key factors that drive the recycling of permanent magnets based on rare earth elements (REEs) and the results of our research on magnet recycling will be discussed, with emphasis on neodymium and

APA, Harvard, Vancouver, ISO, and other styles

15

Vijay, V. Warhate. "Exposure to Electro-Magnetic Fields: Global Standards for Packaging, Safety Certification and Handling of Magnetic Material." International Journal of Advance and Applied Research 4, no. 18 (2023): 79–85. https://doi.org/10.5281/zenodo.8045823.

Full text

Abstract:

Superconducting electromagnets, ambient temperature electromagnets, permanent magnets, rare-earth magnets are Hazardous Magnetic Materials. According to Biological effects and epidemiological studies (100 kHz–300 GHz),  available experimental evidence indicates that the exposure of resting humans for approximately 30 min to EMF producing a whole-body SAR of between 1 and 4 W kg<sup>-1</sup>. Individuals with pacemakers or internal medical devices should use caution when handling strong magnets. Magnetic fields may affect the operation of these devices. Packaging, Labelling and Safet

APA, Harvard, Vancouver, ISO, and other styles

16

Bao, Jinsheng. "Research on the Impact of China's Rare Earth Export Control Measures on Domestic Enterprises and the International Market." Scientific Journal of Economics and Management Research 7, no. 5 (2025): 78–83. https://doi.org/10.54691/9rxhwf67.

Full text

Abstract:

As a core strategic resource in the global high-tech field, rare earths, with their unique physical and chemical properties, play a crucial role in high-end manufacturing, new energy, national defense, and military industries. As the world's largest producer and exporter of rare-earth permanent-magnet materials, China has built a competitive advantage covering the entire industry chain. To maintain the sustainable use of resources and industrial security, the Chinese government has implemented a series of export control measures, which have a profound impact on the transformation and upgrading

APA, Harvard, Vancouver, ISO, and other styles

17

Chernykh, N. S., and A. G. Sokolsky. "Ita-Crao Minor Planet Survey: Results and Prospects." International Astronomical Union Colloquium 165 (1997): 567–70. http://dx.doi.org/10.1017/s0252921100047138.

Full text

Abstract:

AbstractResults of minor planet observation programme that is made jointly by the Institute of Theoretical Astronomy and the Crimean Astrophysical Observatory during three decades with the Zeiss 40-cm double astrograph at Crimea are presented. Almost all permanently numbered minor planets were observed. A catalogue of astrometrical results obtained in the course of this survey contains more than 60 thousand minor planet positions. Many thousand unnumbered asteroids were discovered, 875 of which had received permanent numbers by June of 1996.In the development of this survey programme we plan t

APA, Harvard, Vancouver, ISO, and other styles

18

Meisina, C., F. Zucca, F. Conconi, et al. "Use of Permanent Scatterers technique for large-scale mass movement investigation." Quaternary International 171-172 (August 2007): 90–107. http://dx.doi.org/10.1016/j.quaint.2006.12.011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Wang, Q., F. Yang, Q. Yang, H. Guan, and J. Chen. "Study of a permanent magnet spring mechanism and its application to hydraulic valves." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 224, no. 6 (2010): 1299–303. http://dx.doi.org/10.1243/09544062jmes1959.

Full text

Abstract:

Through study on structure, mechanism, and the calculation method of the magnetic force of a permanent-magnet spring, it can be known that rare-earth permanent-magnet springs can be used for replacing springs used in mechanical equipment, especially in hydraulic valves. The use of magnetic springs can decrease the size of the device and can also reduce noise and vibration. Meanwhile, magnetic springs are more sensitive to load and have a long useful time without fatigue wear.

APA, Harvard, Vancouver, ISO, and other styles

20

HADJIPANAYIS, George C., Jin-fang LIU, Alexander GABAY, and Melania MARINESCU. "Current Status of Rare-Earth Permanent Magnet Research in USA." Journal of Iron and Steel Research, International 13 (January 2006): 12–22. http://dx.doi.org/10.1016/s1006-706x(08)60156-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Berzi, Lorenzo, Caterina Antonia Dattilo, Francesco Del Pero, Massimo Delogu, and Manuel Ignacio Gonzalez. "Reduced use of rare earth elements for permanent magnet generators: preliminary results from NEOHIRE project." Procedia Structural Integrity 24 (2019): 961–77. http://dx.doi.org/10.1016/j.prostr.2020.02.084.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Phillips, I. R., and K. J. Sheehan. "Importance of surface charge characteristics when selecting soils for wastewater re-use." Soil Research 43, no. 8 (2005): 915. http://dx.doi.org/10.1071/sr05045.

Full text

Abstract:

Land application represents a viable option in the management of wastewater such as landfill leachate. The surface charge and ion adsorption characteristics of the receiving soil will play an important role in the success of this disposal strategy. The surface charge characteristics of 6 soils with contrasting chemical and physical properties were studied using charge balance principles. The point of zero net proton charge density, point of zero salt effect and point of zero net charge, and the concentrations of permanent and variable charge as a function of pH, were determined for each soil.

APA, Harvard, Vancouver, ISO, and other styles

23

Barszcz, Piotr. "Investigation of atmospheric corrosion with use of permanent corrosion stations." Research Works of Air Force Institute of Technology 30, no. 1 (2012): 25–44. http://dx.doi.org/10.2478/v10041-012-0002-4.

Full text

Abstract:

Field tests of atmospheric corrosion [7, 14, 15] are understood as investigation that are carried out in the Earth atmosphere at the ambient temperature in order to determine corrosion resistance of metals and pollution of environment by corrosion products, efficiency of corrosion protection or corrosion aggressiveness of environment [9, 11]. The investigation dedicated to prolongation of the technical service time of aircrafts as well implementation of their operation according to their actual technical condition are closely connected to investigation of corrosion processes under natural atmo

APA, Harvard, Vancouver, ISO, and other styles

24

Schneider, Kyle P., Satoru Simizu, Michael E. McHenry, and Maarten P. de Boer. "Optimization Study of Rare Earth-Free Metal Amorphous Nanocomposite Axial Flux-Switching Permanent Magnet Motor." Energies 18, no. 3 (2025): 640. https://doi.org/10.3390/en18030640.

Full text

Abstract:

Metal amorphous nanocomposite (MANC) soft magnetic materials exhibit remarkably low iron loss and high saturation magnetization. However, they have not been widely used in electric motors largely due to a lack of demonstrated manufacturing processing methods and an absence of proven motor designs well suited for their use. Recent developments in these two areas have prompted the optimization study of flux-switching with permanent magnet motor topology using MANCs presented here. This study uses population-based optimization in conjunction with a simplified electromagnetics model to seek rare e

APA, Harvard, Vancouver, ISO, and other styles

25

Cai, Haiwei, Bo Guan, Longya Xu, and Woongchul Choi. "Optimal design of synchronous reluctance machine." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 33, no. 5 (2014): 1569–86. http://dx.doi.org/10.1108/compel-09-2013-0287.

Full text

Abstract:

Purpose – The purpose of this paper is to present optimally designed synchronous reluctance machine (SynRM) to demonstrate the feasibility of eliminating the use of rare earth permanent magnet (PM) in electric machine for vehicle traction applications. Design/methodology/approach – A typical rare earth interior permanent magnet (IPM) machine is used as the benchmark to conduct the optimal design study. Based on the flux distribution, major changes are made to the rotor lamination design. Enhanced torque production and lower torque ripple are specifically targeted as the two main objectives of

APA, Harvard, Vancouver, ISO, and other styles

26

Avrunev, E. I., V. N. Kaverin, A. I. Giniyatov, and N. V. Kaverin. "Some features of cadastral works with the use of permanent-operating reference stations." Geodesy and Cartography 980, no. 2 (2022): 47–56. http://dx.doi.org/10.22389/0016-7126-2022-980-2-47-56.

Full text

Abstract:

The authors consider the features of cadastral works using continuously operating reference stations (CORS). One of the key parameters affecting the determining the coordinates of the base station accuracy is its distance from the original CORS, which must be confirmed at the stage of satellite equipment certification. Reliable and effective control of the exactness of satellite positioning is the discrepancy of the measured line length between the base stations being determined and the same length calculated from the coordinates of the base stations obtained as a result of satellite positioni

APA, Harvard, Vancouver, ISO, and other styles

27

Abdolmaleki, Mehdi, Pedram Asef, and Christopher Vagg. "Unraveling Magnet Structural Defects in Permanent Magnet Synchronous Machines—Harmonic Diagnosis and Performance Signatures." Magnetism 4, no. 4 (2024): 348–67. http://dx.doi.org/10.3390/magnetism4040023.

Full text

Abstract:

Rare-earth-based permanent magnets (PMs) have a vital role in numerous sustainable energy systems, such as electrical machines (EMs). However, their production can greatly harm the environment and their supply chain monopoly presents economic threats. Alternative materials are emerging, but the use of rare-earth PMs remains dominant due to their exceptional performance. Damage to magnet structure can cause loss of performance and efficiency, and propagation of cracks in PMs can result in breaking. In this context, prolonging the service life of PMs and ensuring that they remain damage-free and

APA, Harvard, Vancouver, ISO, and other styles

28

Nam, Dong-Woo, Kangbeen Lee, Si-Woo Song, Won-Ho Kim, and Jae-Jun Lee. "Study on Performance Improvement through Reducing Axial Force of Ferrite Double-Layer Spoke-Type Permanent Magnet Synchronous Motor with Core Skew." Machines 12, no. 4 (2024): 280. http://dx.doi.org/10.3390/machines12040280.

Full text

Abstract:

Recently, due to the price fluctuation and supply instability of rare earth mineral resources, there has been a lot of development of electric motors using non-rare-earth permanent magnets. As a result, motors using Dy-free permanent magnets and ferrite permanent magnets are being researched, and, in particular, ferrite permanent magnets often utilize spoke-type structures, which are magnetic flux concentrators, to compensate for their low coercivity and residual flux density. However, in general, spoke-type PMSMs do not use much reluctance torque, so double-layer spoke-type PMSMs have been st

APA, Harvard, Vancouver, ISO, and other styles

29

Yoon, Keun-young, and Yong-min You. "Optimal Design of a Novel Consequent-Pole Interior Permanent Magnet Motor with Flared-Structured Rotor." Applied Sciences 14, no. 4 (2024): 1496. http://dx.doi.org/10.3390/app14041496.

Full text

Abstract:

Interior permanent magnet motors are widely used in applications requiring high power density and high efficiency due to their high torque-generating capabilities. Recently, given the price fluctuations and unstable supply of rare earth permanent magnets, alternative configurations with reduced use of permanent magnets are being sought. Among the various candidates related to this, the consequent-pole type rotor structure can halve the number of permanent magnets used compared with conventional structures. However, in a no-load analysis, the waveform of the back electromotive force becomes asy

APA, Harvard, Vancouver, ISO, and other styles

30

Baloyi, Mphamela Enos, Phuti Ngoepe, and Hasani Chauke. "Effect of Gadolinium rare-earth element on Nd₂Fe₁₄B permanent magnet." MATEC Web of Conferences 370 (2022): 09001. http://dx.doi.org/10.1051/matecconf/202237009001.

Full text

Abstract:

Neodymium-based permanent magnets (Nd2Fe14B) are the potential permanent magnets for use in various applications due to their high magnetic field strength and resistance to demagnetisation. These magnets have various applications in highly efficient energy conversion machines and devices such as wind turbines and electric vehicles due to their exceptional magnetic properties. However, they suffer low operating temperatures below 585 K. In this study, we investigate the effect of Gadolinium (Gd) rare earth element on the Nd2Fe14B magnets. The structural, electronic, mechanical and vibrational p

APA, Harvard, Vancouver, ISO, and other styles

31

Krasil’nikov, A. Ya, A. A. Krasil’nikov, D. V. Taranov, N. K. Pestov, and V. G. Zubkov. "HE USE OF MAGNETIC CONDUCTORS OF DIFFERENT THICKNESSES IN THE DESIGNS OF THE MAGNETIC SYSTEM AND THE MAGNETIC COUPLING." Spravochnik. Inzhenernyi zhurnal, no. 331 (October 2024): 22–27. https://doi.org/10.14489/hb.2024.10.pp.022-027.

Full text

Abstract:

The possibility of using magnetic conductors made of soft magnetic structural steel – steel 3, with different thicknesses of magnetic conductors in sections of the magnetic system is considered. Mathematical expressions have been obtained for calculating the shear force of highly coercive permanent magnets made of an alloy of rare earth elements Nd–Fe–B with a residual magnetic induction of 1.1 T and a magnet thickness of 10 mm for magnetic systems with magnetic conductor thicknesses in sections of the magnetic system of 10 and 10 mm, 10 and 4 mm, 4 and 4 mm.

APA, Harvard, Vancouver, ISO, and other styles

32

Tiznado, Juan Carlos, Maria Paz Silva, and Natalia Viejo. "Comparing Sliding Block Procedures for Displacement-Based Design of Earth Structures in Light of Major Chilean Earthquakes." Advanced Engineering Forum 21 (March 2017): 3–14. http://dx.doi.org/10.4028/www.scientific.net/aef.21.3.

Full text

Abstract:

Current practice for seismic design of earth structures considers the use of displacement-based methods, which allow a quick and quantitative estimation of the movement of soil masses under earthquake loading. This type of procedures are aimed to establish a relationship between (i) the main earthquake parameters, (ii) the critical acceleration, and (iii) the corresponding permanent displacements of the soil structure. In this sense, based on the well-known Newmark’s sliding block method, several regression models intended for design purposes have been proposed during last decades. However, th

APA, Harvard, Vancouver, ISO, and other styles

33

Kobylyansky, Mikhail, Aleksey Ermolaev, and Dmitriy Kobylyansky. "Experimental Studies of Drilling Tools Magnetic Catchers with the Parallel Connection of Permanent Magnets." MATEC Web of Conferences 297 (2019): 03005. http://dx.doi.org/10.1051/matecconf/201929703005.

Full text

Abstract:

The article presents the results of bench and industrial tests of drilling tools magnetic catchers with the parallel connection of permanent magnets. The catchers are developed on the basis of optimization studies of the mathematical model of the U-shaped magnetic system. The catchers on ferrite-barium magnets with U-shaped magnetic systems showed very low characteristics. The catcher with unshielded magnetic system also showed low power and magnetic parameters. Production tests of such a catcher in a real iron ore well demonstrated its unsuitability for the extraction of the drilling tool ele

APA, Harvard, Vancouver, ISO, and other styles

34

Gregg, P. E. H., A. D. Mackay, L. D. Currie, and J. K. Syers. "Application strategies for Sechura phosphate rock use on permanent pasture." Fertilizer Research 17, no. 3 (1988): 219–34. http://dx.doi.org/10.1007/bf01049579.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Abad, V., J. Sagredo, and J. Gonzalez. "FEA Analysis and Optimization of Rotor Models in Permanent-Magnet Synchronous Motors fitted with Bonded Rare-Earth Magnets." Energies and Quality Journal 1 (June 2019): 19–24. http://dx.doi.org/10.24084/eqj19.212.

Full text

Abstract:

The Toyota Prius MG2 electric motor and its upgrades, since its first appearance in 1997, are presented in this paper. This electric motor has an Interior Permanent Magnet (IPM) fitted with Rare Earth (RE) magnets, which presents clear advantages over the more widely used Induction Motors (IM). The principal advantage is its high power-density value that makes it a leader in the Electric Vehicles (EV) market. This technology, however, faces a problem, in so far as the global production of RE magnets is an exclusive monopoly of China, (motivating the United States and Japan, among others, to in

APA, Harvard, Vancouver, ISO, and other styles

36

Xu, Yiwei, Kuangang Fan, Qian Hu, and Haoqi Guo. "Multi-sensor information fusion localization of rare-earth suspended permanent magnet maglev trains based on adaptive Kalman algorithm." PLOS ONE 18, no. 11 (2023): e0292269. http://dx.doi.org/10.1371/journal.pone.0292269.

Full text

Abstract:

Since the positioning accuracy of sensors degrades due to noise and environmental interference when a single sensor is used to localize a suspended rare-earth permanent magnetically levitated train, a multi-sensor information fusion method using multiple sensors and self-correcting weighting is proposed for permanent magnetic levitated train localization. A decay memory factor is introduced to reduce the weight of the influence of historical measurement data on the fusion estimation, thus enhancing the robustness of the fusion algorithm. The Kalman filtering results suffer from inaccuracy when

APA, Harvard, Vancouver, ISO, and other styles

37

Katona, Mihály, and Péter Kiss. "Modelling of a Permanent Magnet Synchronous Motor and its Control Circuit in Simulink Environment." Renewable Energy and Power Quality Journal 19 (September 2021): 321–26. http://dx.doi.org/10.24084/repqj19.286.

Full text

Abstract:

The most commonly used electric motor in electric vehicles is the permanent magnet synchronous motor. The primary production and refinement of rare earth materials used in these motors are immensely damaging to the environment. A new wave of technology in the aspect of electric motors is emerging and that is the non-rare earth element magnet assisted synchronous reluctance motor. During the development process it is beneficial to keep the expenditures at the minimum. To reach that goal a comprehensive simulation of the designed motor and its control circuit could be the answer. It is reasonabl

APA, Harvard, Vancouver, ISO, and other styles

38

Zhang, Fengyu, David Gerada, Zeyuan Xu, et al. "Performance Entitlement by Using Novel High Strength Electrical Steels and Copper Alloys for High-Speed Laminated Rotor Induction Machines." Electronics 11, no. 2 (2022): 210. http://dx.doi.org/10.3390/electronics11020210.

Full text

Abstract:

The laminated rotor Induction Machine (IM), with its simple construction and manufacturing, robustness, ease of control and comparatively lower cost remains by far the most utilized electromechanical energy converter. At very high speeds, traditionally its use is considered to be limited to the previously established operational limits of 2.5 × 105 rpm√kW, beyond which the surface Permanent Magnet (PM) Machine and the solid rotor Induction Machine become the machines available for consideration. The aforesaid limits are derived from the use of classic materials. This paper reviews the recent d

APA, Harvard, Vancouver, ISO, and other styles

39

Sobrinho, Maurício Tadeu, Fabrício Bau Dalmas, Renata Aparecida Costa, and Antonio Roberto Saad. "Conflitos decorrentes da ocupação do solo nas margens da represa Guarapiranga, no município de Embu Guaçu, em consonância com a legislação ambiental vigente." Revista Principia - Divulgação Científica e Tecnológica do IFPB 1, no. 33 (2017): 21. http://dx.doi.org/10.18265/1517-03062015v1n33p21-28.

Full text

Abstract:

<p>The Forest Code (Federal Law 12.651/12) defined limits for the occupation and use of soil, creating the Permanent Preservation Areas (PPA), because the occupation and human activities, exercised on the banks of the great water-supply reservoirs, increases constantly, impairing the quality of water, the flora and fauna, phenomenon known as anthropic activity. The Guarapiranga Reservoir is located in the southwest of the Metropolitan Region of São Paulo; covering part of the Cotia, Embu, Itapecerica da Serra, Juquitiba, São Lourenço da Serra, Embu Guaçu and São Paulo municiçpalities. Th

APA, Harvard, Vancouver, ISO, and other styles

40

Erik, Lapkhanov, and Khoroshylov Serhii. "DEVELOPMENT OF THE AEROMAGNETIC SPACE DEBRIS DEORBITING SYSTEM." Eastern-European Journal of Enterprise Technologies 5, no. 5 (101) (2019): 30–37. https://doi.org/10.15587/1729-4061.2019.179382.

Full text

Abstract:

The study has considered the possibility of creating an aeromagnetic system for removing space debris from low Earth orbits. The peculiarity of the design of the aeromagnetic deorbiting system is the use of magnetic controls for the relative position of the aerodynamic element with permanent rotary magnets that are shielded with the help of special screen capsules with shutters. It should be noted that this system is offered for aerodynamically unstable spacecraft. Besides, to analyse the performance and benefits of using permanent magnet aeromagnetic input systems, a corresponding discrete la

APA, Harvard, Vancouver, ISO, and other styles

41

Damasceno, Lucca Cardoso, Hugo Mirindiba Bomfim Palmeira, Luan Marra Gomes, et al. "Complicações provocadas pelo uso de preenchedores permanentes como PMMA / Complications caused by the use of permanent fillers such as PMMA." Brazilian Journal of Health Review 4, no. 5 (2021): 22312–15. http://dx.doi.org/10.34119/bjhrv4n5-326.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Fu, L., and H. Karimi-Maleh. "Recent advances in electrochemical recovery of rare earth elements from NdFeB magnets." Journal of Mining and Metallurgy, Section B: Metallurgy, no. 00 (2024): 1. http://dx.doi.org/10.2298/jmmb230823001f.

Full text

Abstract:

Recent advances in electrochemical methods show promise for more sustainable recycling of rare earth elements (REEs) from end-of-life NdFeB permanent magnets. Demand for NdFeB magnets is rapidly growing for clean energy applications, motivating recycling efforts to diversify REE supplies. Core electrochemical steps involve selective dissolution of REE-rich phases at the anode and reduction of REE ions at the cathode. Pretreatment including demagnetization, mechanical size reduction, and leaching help liberate and concentrate the REEs. Thermal demagnetization and mechanical crushing make the ma

APA, Harvard, Vancouver, ISO, and other styles

43

An, Jihyeon, Seunghan Kim, Seungil Park, and Tae-Hoon Kim. "Recent progress in research and development of rare-earth free iron nitride permanent magnet." Ceramist 27, no. 2 (2024): 229–42. http://dx.doi.org/10.31613/ceramist.2024.27.2.05.

Full text

Abstract:

The high cost of rare earth materials, unstable supply and high demand remain big problems to solve for permanent magnet industries. Thus α″-Fe<sub>16</sub>N<sub>2</sub> has been picked up as one of the most promising rare earth-free magnet candidates because of its use of environmental-friendly raw materials, confirmed giant saturation magnetic flux density (2.9 T), and reasonably high magnetic anisotropy constant (1.8 MJ/m<sup>3</sup>). Also, α”-Fe<sub>16</sub>N<sub>2</sub> metastable with film form exhibits high tetragonality (c/a=

APA, Harvard, Vancouver, ISO, and other styles

44

Fys, M. M., A. M. Brydun, I. I. Demkiv, and T. M. Khometa. "COMPOSITION OF THE FUNDAMENTAL PERMANENT PLANETS OF THE EARTH GROUP INTO A SINGLE PLANETARY COORDINATE SYSTEM." Kosmìčna nauka ì tehnologìâ 30, no. 6 (2024): 84–93. https://doi.org/10.15407/knit2024.06.084.

Full text

Abstract:

Two groups of quantities characterize planets as celestial bodies: dynamic compression and parameters of the planet’s external gravitational field are specified in different coordinate systems. But modern inquiries of natural sciences about the planets, including the Earth, require the joint application of these parameters, which requires their presentation in a single coordinate system. In most cases, the coefficients of the expansion of the gravitational field to this day are brought to the coordinate system associated with the principal axes of the planetary ellipsoid, in which the dynamic

APA, Harvard, Vancouver, ISO, and other styles

45

Fazle Qadeem, Saadia Farid, Faisal Saeed, Khurshid Ali, and Hasham Khan. "ASSESSMENT OF FIRST PERMANENT MOLAR HEALTH STATUS IN 6-15 YEARS OLD CHILDREN VISITING KHYBER COLLEGE OF DENTISTRY, PESHAWAR: A CROSS-SECTIONAL STUDY." Journal of Khyber College of Dentistry 11, no. 03 (2021): 47–51. http://dx.doi.org/10.33279/jkcd.v11i03.133.

Full text

Abstract:

Objective: To assess the health status of the first permanent molar (decayed, missing, filled teeth, hypoplasia, and hypocalcification) in 6-15 yrs old children. Materials and Methods: A total of 147 children ranging from the age of 6-15yrs with a mean of 9.36± 2.63yrs were considered in the study. A self-prepared performa was use to collect data regarding decayed, missing, filled, hypoplastic, hypocalcified first permanent molars in children attending the paediatric department, Khyber College of Dentistry, Peshawar. Demographic data like age, gender, and parental occupation

APA, Harvard, Vancouver, ISO, and other styles

46

Cherkezova-Zheleva, Zara, Marian Burada, Anca Elena Sobetkii (Slobozeanu), Daniela Paneva, Sabina Andreea Fironda, and Radu-Robert Piticescu. "Green and Sustainable Rare Earth Element Recycling and Reuse from End-of-Life Permanent Magnets." Metals 14, no. 6 (2024): 658. http://dx.doi.org/10.3390/met14060658.

Full text

Abstract:

Rare earth elements (REEs) are key materials for the development of renewable energy devices such as high-power magnets for wind turbines, electric vehicles, or fuel cells for hydrogen generation, aiming to fulfill the objectives of the European Green Deal for a carbon-neutral economy. The increased demand for REEs and their criticality strongly require the improvement of their extraction technologies from primary resources and the enhancement of their circularity reuse rate from secondary resources. The aim of this paper is to focus attention on the possibilities offered by emerging methods s

APA, Harvard, Vancouver, ISO, and other styles

47

Akinloye, B. O., and G. O. Uzedhe. "Controllable single-phase smart synchronous generator towards solar-pneumatic power generation." Nigerian Journal of Technology 39, no. 2 (2020): 493–99. http://dx.doi.org/10.4314/njt.v39i2.19.

Full text

Abstract:

This paper presents the development of a controllable single-phase surface-mounted permanent magnet synchronous generator (SPSMPMSG) for low speed applications. Presently, the world is faced with degrading climatic conditions that may be worsen if energy need is met by fossil fuel and other conventional means of generation. On the other hand, renewable alternatives are not always of constant speed, and are usually not high enough to turn conventional alternators. There is therefore a need for the development of alternators that can generate electricity from low speed sources. The development o

APA, Harvard, Vancouver, ISO, and other styles

48

Song, Si-Woo, Seung-Heon Lee, and Won-Ho Kim. "Design and Analysis of Consequent Pole Axial Flux Motors for Reduced Torque Ripple and Magnet Consumption." Processes 13, no. 7 (2025): 2139. https://doi.org/10.3390/pr13072139.

Full text

Abstract:

With growing demand for high-performance and high-efficiency motors, Axial Flux Permanent Magnet Motors (AFPMs) have received significant attention. These motors typically use rare-earth magnets due to their high magnetic and energy density. However, rare-earth magnets face challenges such as limited availability and price volatility, prompting research into reducing magnet usage. This study aims to reduce magnet consumption by applying a Consequent Pole (CP) structure to AFPMs. While CP structures improve magnet efficiency, they also introduce significant back-EMF ripple. To address this, an

APA, Harvard, Vancouver, ISO, and other styles

49

Leite, Leandro Henrique, Vanessa Cabral Costa de Barros, Maria Eduarda Carvalho Monteiro, Luiz Otávio Moras Filho, and Luís Antônio Coimbra Borges. "Permanent preservation areas in Mantiqueira sierra: perspectives for regularization along watercourses." Ambiente e Agua - An Interdisciplinary Journal of Applied Science 15, no. 1 (2020): 1. http://dx.doi.org/10.4136/ambi-agua.2422.

Full text

Abstract:

Brazilian Native Vegetation Protection Law (Law n. 12.651/2012) brought flexibility related to the sizing of Permanent Preservation Areas (PPAs) along watercourses when there was anthropogenic occupation before July 22, 2008 (consolidated rural area), which may vary according to the size of the property. To better understand the effects of this law, we analyzed land use and land occupation in PPAs along watercourses in a portion of Grande River drainage basin. Scenarios were also developed to compare the effects of the reduction of PPA limits, allowing us to discuss measures to avoid water qua

APA, Harvard, Vancouver, ISO, and other styles

50

Zgłobicki, Wojciech, Bogusława Baran-Zgłobicka, Leszek Gawrysiak, and Małgorzata Telecka. "The impact of permanent gullies on present-day land use and agriculture in loess areas (E. Poland)." CATENA 126 (March 2015): 28–36. http://dx.doi.org/10.1016/j.catena.2014.10.022.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!