Who invented the control theory?4 answersControl theory, the mathematical foundation for altering the behavior of dynamical systems, has a history dating back around 185 years, with contributions from various scholars like Maxwell, Black, and Evans. John Hagan, along with colleagues, developed power-control theory to explain gender gaps in offending, integrating traditional control theories with measures of household power, particularly patriarchy, to understand crime and delinquency disparities. While Gottfredson and Hirschi's self-control theory emphasizes the role of low self-control in criminal behavior, attributing it to poor parental socialization and the inability to delay gratification. These theories collectively shed light on different aspects of control and power dynamics within systems, offering insights into behavior regulation and societal structures.
Who is the first person to produce magnetic field in the world?4 answersThe first person to produce a magnetic field in the world was William Gilbert. In his scientific treatise on magnetism, "De Magnete," published in 1600, Gilbert described his experiments and suggested that the Earth itself was a huge magnet. He demonstrated the internal origin of the Earth's magnetic field by comparing the lines of force around the Earth to those around a naturally magnetic sphere of lodestone. This groundbreaking work by Gilbert is considered to be the first publication of modern physics, even predating Galileo's solution to the problem of gravity.
Who created Mechatronics?4 answersMechatronics was created by Ko Kikuchi, the former president of the Yasakawa Electric Company, who introduced the term in 1969 as a trademark for devices that combined mechanics and electronics. The term "mechatronics" was coined by Tetsuro Mori and was trademarked by Yasakawa Electric Corporation from 1971 to 1982. The discipline of mechatronics emerged as a new engineering discipline in the late twentieth century, combining mechanical engineering and electronics. The evolution of mechatronics can be traced back to the gradual addition of electronics, computer controls, and software to electromechanical products. Mechatronics is an interdisciplinary field that integrates mechanics, electronics, computing, control techniques, and artificial intelligence to create new value in equipment and systems.
Who invented the first inverter?4 answersThe first inverter was invented by Frank J. Sprague.
What are belt motors?5 answersBelt motors are electric motors used in belt conveyors for transportation purposes. They play a crucial role in the performance and efficiency of the conveyor system. The abstracts provide insights into various aspects of belt motors. Abdiev and Bakieva developed a mathematical model for the starting and braking modes of asynchronous motors in belt conveyors. Jafarboland and Zadehbagheri focused on the dynamic modeling of flexible connections and the control of two coupled electric motors in a system. Pechenik, Burian, and Zemlianukhina proposed a modern electric drive system using vector-controlled induction electric motors for belt-rope conveyors. Ma analyzed the advantages and disadvantages of different drive devices, including permanent magnet motor variable frequency drive systems, in belt conveyors. Semenchenko, Stadnik, Belitsky, Semenchenko, and Stepanenko studied the impact of load flow patterns on energy parameters and the resource of belt conveyors during coal mining. These abstracts provide valuable information on the design, control, and energy efficiency of belt motors in conveyor systems.
Who invented the MRI scan machine?5 answers