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Relevant bibliographies by topics / Dynamics of rotating machines

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Academic literature on the topic 'Dynamics of rotating machines'

Author: Grafiati

Published: 31 May 2025

Last updated: 31 July 2025

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Journal articles on the topic "Dynamics of rotating machines"

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Мудров, Александр, and Aleksandr Mudrov. "DYNAMICS OF STARTING MACHINES." Vestnik of Kazan State Agrarian University 13, no. 4 (2018): 119–23. http://dx.doi.org/10.12737/article_5c3de39987d113.47195585.

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The operation of any machine includes three periods of operation: start and acceleration, steady motion, braking and stopping. During periods of start-up and braking, large dynamic loads occur, adversely affecting the strength of machine elements and the overloading of the drive source. The purpose of the study is to determine the dynamic loads during the start-up of the machine and to find options for reducing them. The mathematical values of dynamic loads are determined by the example of a spatial mixer from rotating elements of the drive. It has been established that the dynamic moments fro

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Jiang, Bing Hua, Li Fang, and Hang Biao Guo. "The Tapping Machine Mathematical Modeling Simulation Study." Applied Mechanics and Materials 373-375 (August 2013): 2073–77. http://dx.doi.org/10.4028/www.scientific.net/amm.373-375.2073.

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Based on the tapping machines special structural features and practices, from both directions of rotation and impact established the tapping machine mechanism rotating borer and impact dynamic mathematical model, analysed the effect of different tapping machines parameters on the model itself, simulated the model with inputting wide pulse signal, the simulation results show that: firstly, the tapping machine model established in this paper is reasonable; secondly, increase the damping coefficient of the blast furnace, the tapping machines rotating borer rotation speed and impact attenuation sp

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Penny, J. E. T., and Michael I. Friswell. "The Dynamics of Rotating Machines with Cracks." Materials Science Forum 440-441 (November 2003): 311–20. http://dx.doi.org/10.4028/www.scientific.net/msf.440-441.311.

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Zapoměl, Jaroslav. "Special Issue on Rotor Dynamics: Theoretical Analysis, Computer and Experimental Modelling, Measurements." Applied Sciences 13, no. 20 (2023): 11551. http://dx.doi.org/10.3390/app132011551.

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Podrigalo, Mikhail, Andriy Kashkanov, Mykhailo Kholodov, and Andriy Poberezhnyi. "Dynamics of machines with ideal inertial motion." Journal of Mechanical Engineering and Transport 14, no. 2 (2022): 97–102. http://dx.doi.org/10.31649/2413-4503-2021-14-2-97-102.

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The term "inertioid" and its first design in 1936 was invented by engineer V. N. Tolchin. Despite the demonstration of unsupported motion using a physical model, the mystery of the inertioid has existed for almost a century. There are several theories explaining the motion of the inertioid (or mechanisms with inertial motion). These theories include the theory of friction, which proves that the movement of the device occurs due to the difference between the coefficients of friction and the coefficients of rolling resistance in contact between the bottom of the machine and the road. In some wor

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Dhurvey, Akanksha. "Transmissibility Analysis of a Regenerated Rotor System." International Journal for Research in Applied Science and Engineering Technology 9, no. 8 (2021): 1102–7. http://dx.doi.org/10.22214/ijraset.2021.37542.

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Abstract: The aim of this paper is to represents a dynamic behavior of rotor bearing system wirth simply supported beam for three different position disc. rotating machinery such as compressors, turbines, pumps, jet engines, turtobo chargers, etc. are subject to vibrations. rotating machines are operated in very high speed and they are subjected to some unbalance force due to vibration from that machine pass to the foundation of machine.so the analysis of the dynamics parameter of rotor it is important to determine force transmissibility, natural frequency, critical speed and amplitudes of rot

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Espinoza-Sepulveda, Natalia, and Jyoti Sinha. "Mathematical Validation of Experimentally Optimised Parameters Used in a Vibration-Based Machine-Learning Model for Fault Diagnosis in Rotating Machines." Machines 9, no. 8 (2021): 155. http://dx.doi.org/10.3390/machines9080155.

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Mathematical models have been widely used in the study of rotating machines. Their application in dynamics has eased further research since they can avoid time-consuming and exorbitant experimental processes to simulate different faults. The earlier vibration-based machine-learning (VML) model for fault diagnosis in rotating machines was developed by optimising the vibration-based parameters from experimental data on a rig. Therefore, a mathematical model based on the finite-element (FE) method is created for the experimental rig, to simulate several rotor-related faults. The generated vibrati

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Vansteenkiste, A., M. Loccufier, B. Vervisch, and P. De Baets. "Modal analysis and testing of rotating machines for predictive maintenance: effect of gyroscopic forces." International Journal Sustainable Construction & Design 3, no. 2 (2012): 116–22. http://dx.doi.org/10.21825/scad.v3i2.20564.

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Through the year’s preventive maintenance, which is based on vibration measurements hasgrown in importance to reduce costs. However in industry nowadays there is still a great need for goodanalytical prediction models that describe the dynamics of rotating structures. In this paper it is first shownhow to build a model for for undamped gyroscopic systems. Secondly the model is analysed and used tomake a parametric study for the design a test rig. It is found that the third and the fourth eigenfrequencychangein function of the rotation speed due to the gyroscopic effect. Finally the experimenta

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Gizelska, Małgorzata, Dorota Kozanecka, and Zbigniew Kozanecki. "Diagnostics of the Mechatronic Rotating System." Key Engineering Materials 588 (October 2013): 101–8. http://dx.doi.org/10.4028/www.scientific.net/kem.588.101.

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Nowadays rotating systems are equipped with diagnostic systems that are based on collecting and recording measurement data and that process a huge amount of data during the machine operation. An analysis of these data and their interpretation, as well as finding a correlation between process parameters and dynamics of the machine is a very important problem. In the paper, a concept and selected procedures of the specialized software using advanced information technology for the diagnostic system dedicated for systems of rotating machines with active magnetic bearings will be presented. It is u

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El-Borhamy, Mohamed, Essam Eddin M. Rashad, Ismail Sobhy, and M. Kamel El-Sayed. "Modeling and Semi-Analytic Stability Analysis for Dynamics of AC Machines." Mathematics 9, no. 6 (2021): 644. http://dx.doi.org/10.3390/math9060644.

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In this article, a semi-analytical technique is proposed to predict stable sustained periodic responses of AC electrical machines. Based on such desired outputs, the proper selections of machine variables are captured, such as the perturbation parameter arisen from the relative movement between the stationary and rotating parts. Compared to the experimental results, the derived analytical results are relatively well-fitted with the studied practical cases.

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Dissertations / Theses on the topic "Dynamics of rotating machines"

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Lee, Sun Ung. "Dynamics of high-speed rotating machines." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326078.

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PEDREIRA, JAVA ATAYDE. "DYNAMICS OF ROTATING MACHINERY IN FLUID-FILM BEARING." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9966@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>Este trabalho analisa a influência dos mancais hidrodinâmicos no comportamento rotodinâmico das turbomáquinas, no que diz respeito na resposta ao desbalanceamento, modos de vibrar e, principalmente, a instabilidade, que tende a manifestar-se em rotações elevadas ou baixas cargas. As propriedades de rigidez e amortecimento do mancal são determinadas a partir da solução analítica da Equação de Reynolds, usando a aproximação do mancal curto. Um procedimento é apresentado para modelagem dinâmica do sistema rotor-mancal. O modelo de e

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Elnady, Maged Elsaid. "On-shaft vibration measurement using a MEMS accelerometer for faults diagnosis in rotating machines." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/onshaft-vibration-measurement-using-a-mems-accelerometer-for-faults-diagnosis-in-rotating-machines(cf9b9848-972d-49ff-a6b0-97bef1ad0e93).html.

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The healthy condition of a rotating machine leads to safe and cheap operation of almost all industrial facilities and mechanical systems. To achieve such a goal, vibration-based condition monitoring has proved to be a well-accepted technique that detects incipient fault symptoms. The conventional way of On-Bearing Vibration Measurement (OBVM) captures symptoms of different faults, however, it requires a relatively expensive setup, an additional space for the auxiliary devices and cabling in addition to an experienced analyst. On-Shaft Vibration Measurement (OSVM) is an emerging method proposed

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Barsoum, Nader N. "Analysis and computation of instability mechanisms in rotating electrical machinery." Thesis, University of Newcastle Upon Tyne, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328149.

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Melo, Brandao De Raissa. "Surveillance de l’apparition de fissures sur des composants structuraux de machines." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI073.

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Le principe de la maintenance conditionnelle consiste à évaluer en permanence l’intégrité des machines industrielles, à partir des mesures et de traitements du signal appropriés, afin d’intervenir uniquement au moment le plus opportun. Dans ce contexte, l’objectif de cette thèse est de développer une technique de détection, aussi précoce que possible, de l’amorce de dégradation lente d’une structure vibrante, telle que les fissures de fatigue, pour éviter toute défaillance inattendue des machines. Notre approche se base sur les données mesurées à l’aide de deux moyens expérimentaux mis en œuvr

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Matija, Igli. "Design of a fluid inerter for the control of rotor vibrations." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/12235/.

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Nel 2008, due articoli della rivista sportiva “Autosport” rivelarano dettagli di una nuova sospensione meccanica nota con il nome di "J-damper" che era entrata in Formula 1 e che aveva offerto in termini di prestazioni significativi aumenti di maneggevolezza e aderenza. Si trattava di un "inerter", la cui origine sta nel lavoro accademico su circuiti meccanici ed elettrici realizzati dal prof. M. C. Smith. Gli Inerter sono particolari dispositivi meccanici con la proprietà che la forza applicata ai punti fissi, detti terminali, è direttamente proporzionale all'accelerazione. Tale dispositivo h

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Xu, Wubin. "The effect of manufacturing tolerances on the steady state and dynamic performance of rotating machines supported by journal bearings." Thesis, Staffordshire University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.522386.

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Kanth, Ratnakar M. "A personal computer based instrumentation system for determining real-time dynamic torque in rotating machinery." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/45823.

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<p>Measurement of dynamic/transient torques is important in the dynamic analysis of rotating machinery as it provides insight into the internal state of the machine. Existing methods are difficult to implement, results are not obtained in real-time and are not very accurate.</p> <p> This thesis introduces a new method of determining real-time dynamic torque. An optical encoder is used to sense motion at a convenient point in the rotating system containing the rigid shaft of interest. The encoderâ s output is processed digitally to yield angular velocity, acceleration and dynamic torque

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De, Gaudemaris Vincent. "Development of low-to mid-fidelity models for the analysis of whirl flutter in rigid or flexible blade propellers." Electronic Thesis or Diss., Ecully, Ecole centrale de Lyon, 2025. http://www.theses.fr/2025ECDL0002.

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Alors que les avions de nouvelle génération tendent à intégrer des moteurs de plus grand diamètre sur des ailes d’allongement croissant, des préoccupations émergent concernant l'impact de ces évolutions sur le flottement gyroscopique. Cette instabilité aéroélastique, pouvant affecter les avions à hélice classiques comme des configurations plus complexes équipées d'open rotors, se manifeste par un mouvement de précession divergent de l'axe de rotation du moteur. Il est donc essentiel de s'intéresser à ce phénomène pour garantir la sécurité et la fiabilité des prochaines générations d'avions.Les

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Balmaseda, Aguirre Mikel. "Reduced order models for nonlinear dynamic analysis of rotating structures : Application to turbomachinery blades." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI067.

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In the present work reduced order models (ROM) that are independent from the full order finite element models (FOM) considering geometrical non linearities are developed and applied to the dynamic study of rotating structures. The structure is considered to present nonlinear vibrations around the pre-stressed equilibrium induced by rotation enhancing the classical linearised approach. The reduced nonlinear forces are represented by a polynomial expansion obtained by the Stiffness. Evaluation Procedure (STEP) and then corrected by means of an original procedure by means of a Proper Orthogonal D

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Books on the topic "Dynamics of rotating machines"

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Conference on Mechanical Vibration and Noise (12th 1989 Montreal, Quebec). Rotating machinery dynamics. American Society of Mechanical Engineers, 1989.

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Rao, J. S. History of Rotating Machinery Dynamics. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1165-5.

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service), SpringerLink (Online, ed. History of Rotating Machinery Dynamics. Springer Netherlands, 2011.

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International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (3rd 1990 Honolulu, Hawaii). Rotating machinery--dynamics: Proceedings of the Third International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-3). Hemisphere Pub. Corp., 1992.

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International Symposium on Transport Phenomena, Dynamics, and Design of Rotating Machinery (2nd 1988 Honolulu, Hawaii). Dynamics of rotating machinery: Proceedings of the Second International Symposium on Transport Phenomena, Dynamics, and Design of Rotating Machinery, part II. Hemisphere Pub. Corp., 1990.

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International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (3rd 1990 Honolulu, Hawaii). Rotating machinery--transport phenomena: Proceedings of the Third International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-3). Hemisphere Pub. Corp., 1992.

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7

CISM/IFToMM Symposium (1993 Udine, Italy). Diagnostics of rotating machines in power plants: Proceedings of the CISM/IFToMM Symposium, October 27-29, 1993, Udine, Italy. Springer-Verlag, 1994.

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8

Jean-Pierre, Sauvage, and Amendola V, eds. Molecular machines and motors. Springer, 2001.

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International Symposium on Transport Phenomena, Dynamics, and Design of Rotating Machinery (2nd 1988 Honolulu, Hawaii). Transport phenomena in rotating machinery: Proceedngs of the Second International Symposium on Transport Phenomena, Dynamics, and Design of Rotating Machinery, part 1. Hemisphere Pub. Corp., 1990.

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International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (4th 1992 Honolulu, Hawaii). Rotating machinery-1992: Proceedings of the Fourth International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-4). Begell House, 1993.

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Book chapters on the topic "Dynamics of rotating machines"

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Genta, Giancarlo. "Dynamic Behaviour of Rotating Machinery." In Vibration of Structures and Machines. Springer US, 1995. http://dx.doi.org/10.1007/978-1-4684-0236-0_4.

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Genta, Giancarlo. "Dynamic Behaviour of Rotating Machinery." In Vibration of Structures and Machines. Springer New York, 1993. http://dx.doi.org/10.1007/978-1-4757-1111-0_4.

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Genta, Giancarlo. "Dynamic Behaviour of Rotating Machinery." In Vibration of Structures and Machines. Springer New York, 1999. http://dx.doi.org/10.1007/978-1-4612-1450-2_4.

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Gerling, Dieter. "Dynamic Operation and Control of Permanent Magnet Excited Rotating Field Machines." In Electrical Machines. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-17584-8_14.

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Yunusa-Kaltungo, Akilu, Adrian D. Nembhard, and Jyoti K. Sinha. "Experimental Observations of Rotor Orbit Analysis in Rotating Machines." In Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-06590-8_127.

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Sinha, Jyoti K. "Vibration Based Condition Monitoring of Rotating Machines: A Future Possibility?" In IUTAM Symposium on Emerging Trends in Rotor Dynamics. Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-94-007-0020-8_43.

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Dimarogonas, Andrew D., Stefanos A. Paipetis, and Thomas G. Chondros. "Variable Elasticity Effects in Rotating Machinery." In Analytical Methods in Rotor Dynamics. Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-5905-3_2.

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Borghesani, Pietro, Tommaso Argentini, Marco Belloli, and Fabio C. Robustelli. "Dynamic Absorbers for Rotating Machinery." In Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-06590-8_140.

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Adams, Maurice L. "Journal Bearing and Radial Seal Rotor Dynamics." In Rotating Machinery Research and Development Test Rigs. CRC Press, 2017. http://dx.doi.org/10.1201/9781315116723-4.

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Cangioli, Filippo, Alice Innocenti, Lorenzo Marini, Enrico Meli, Luca Pugi, and Andrea Rindi. "An Innovative Rotordynamical Model for Coupled Flexural-Torsional Vibrations in Rotating Machines." In Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-06590-8_130.

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Conference papers on the topic "Dynamics of rotating machines"

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Raykovskiy, Nikolay A., Sergey A. Abramov, Dmitriy B. Ponomarev, and Alexander G. Zyrin. "A method of measuring friction surface temperature of the rotating rotor." In 2016 Dynamics of Systems, Mechanisms and Machines (Dynamics). IEEE, 2016. http://dx.doi.org/10.1109/dynamics.2016.7819070.

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Suvorov, A. S., E. M. Sokov, and V. A. Sharagina. "Finite element modeling of noise emission in mechanoacoustic systems with rotating subdomains." In 2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM). IEEE, 2022. http://dx.doi.org/10.1109/dvm55487.2022.9930863.

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Kotzyba, Peter, and Christian Bohn. "LPV control of speed fluctuations in rotating machines with nonlinear dynamics." In 2017 25th Mediterranean Conference on Control and Automation (MED). IEEE, 2017. http://dx.doi.org/10.1109/med.2017.7984218.

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Shkaev, A. G., D. G. Lobov, A. A. Valke, D. B. Ponomarev, and A. A. Shkaev. "Electromagnetic Sensor for Kilns Rotation Control." In 2023 Dynamics of Systems, Mechanisms and Machines (Dynamics). IEEE, 2023. http://dx.doi.org/10.1109/dynamics60586.2023.10349532.

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Diveyev, Bohdan M., and Zinovij A. Stotsko. "Dynamic Vibration Absorber Optimal Design With Emphasis on Complete Machine Dynamics Modelling." In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59334.

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The main aim of this paper is improved dynamic vibration absorbers design with taking into account complex rotating machines dynamic The is considered for the complex vibroexitated constructions. Methods of decomposition and the numerical schemes synthesis are considered on the basis of new methods of modal methods. Development of of complicated machines and buildings in view of their interaction with system of dynamic vibration absorbers is under discussion.

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Alves, Diogo S., Nicola Bailey, and Patrick Keogh. "Rotating System Control Using Hybrid Active Bearings." In ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/gt2023-103845.

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Abstract Strategies to control rotor dynamic behavior are critical to achieve improved performance of rotating machinery. It is possible to control the dynamics of a rotating system through the bearing characteristics, i.e., changing their damping and stiffness coefficients. Bearings that can be commanded to change their characteristics over time are known as active bearings. Because active bearings have a complex design, their use in commercial machines is limited. In this scenario, journal bearings are still regularly used since they can provide damping and high load carrying capacity. Moreo

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Muszynska, Agnes. "Specifics of Damping Evaluation in Rotating Machines." In ASME 1996 Turbo Asia Conference. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-ta-004.

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Focused on rotor lateral modes, the paper discusses specifics of damping evaluation in rotating machines. Rotors force the fluid trapped in small rotor-to-stator radial clearances to rotate in circumferential fashion. The fluid in circumferential motion generates a tangential force acting in feedback on the rotor. This force direction is opposite to that of damping force. The “effective damping” is, therefore, reduced or even nullified by the fluid interaction effects. The classical measures of damping in mechanical structures, such as Logarithmic Decrement and Amplification Factor, which are

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Bubenchikov, A. A., I. S. Lebedev, T. V. Bubenchikova, O. V. Kropotin, and V. N. Goryunov. "Evaluation of Using No-Load Wind Wheels in a Flow Accelerator Body for Wind Power Plants with a Vertical Rotation." In 2018 Dynamics of Systems, Mechanisms and Machines. IEEE, 2018. http://dx.doi.org/10.1109/dynamics.2018.8601425.

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Gu, Ping. "Dynamic Participation Factors for Structures Supporting Rotating Machines." In Structures Congress 2007. American Society of Civil Engineers, 2007. http://dx.doi.org/10.1061/40946(248)63.

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Salmenpera¨, Pekka, and Juha Miettinen. "Supervised Operation Monitoring and Control System of Rotating Rolls." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-55149.

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The dynamic behavior of rotating machinery depends on the construction and foundation of the machine and in addition of the machine running parameters. By choosing appropriate parameters it is possible to influence considerably on the vibration of the machine. By driving the machine in that kind of an advantageous running window it is possible to minimize the vibration of the machine and to improve the quality of the product, but not to lose the efficiency of the productivity. Machines where the running window is important in maximizing the quality of the product are rotating cylindrical rolls

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Reports on the topic "Dynamics of rotating machines"

1

Goodwin, M. J., and M. P. Roach. Vibration Control in Rotating Machinery Using Variable Dynamic Stiffness Squeeze-Films. Defense Technical Information Center, 1988. http://dx.doi.org/10.21236/ada202902.

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Ceccio, Steven L. Dynamics of Cavitation on Rotating Propulsors. Defense Technical Information Center, 2003. http://dx.doi.org/10.21236/ada416939.

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Lim, Chjan. Dynamics and Statistical Mechanics of Rotating and non-Rotating Vortical Flows. Office of Scientific and Technical Information (OSTI), 2013. http://dx.doi.org/10.2172/1110818.

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Roach M. J. /Goodwin, M. P. Vibration Control in Rotating Machinery Using Variable Dynamic Stiffness Squeeze-Films. Volume 1. Defense Technical Information Center, 1986. http://dx.doi.org/10.21236/ada174417.

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Goodwin, M. J., and M. P. Roach. Vibration Control in Rotating Machinery Using Variable Dynamic Stiffness Squeeze Films. Volume 2. Defense Technical Information Center, 1986. http://dx.doi.org/10.21236/ada174433.

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Hahm, T. S. Trapped particle dynamics in toroidally rotating plasmas. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/10148894.

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Hahm, T. S. Trapped particle dynamics in toroidally rotating plasmas. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/5257144.

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Case, Scott W., and Kenneth L. Reifsnider. Advanced Composite Performance: Material Behavior and Life Cycle Prediction for Rotating Machines. Defense Technical Information Center, 2003. http://dx.doi.org/10.21236/ada414609.

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Junttila, Jukka, Ville Lämsä, Leonardo Espinosa Leal, and Anssi Sillanpää. Feature engineering –based machine learning models for operational state recognition of rotating machines. Peeref, 2023. http://dx.doi.org/10.54985/peeref.2303p8483224.

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Giles, G., J. Kirkpatrick, M. Wendel, and J. Bullock, IV. Fluid dynamics analysis of a rotating axisymmetric part using FIDAP. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6985521.

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