Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"Electric circuits"”.
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Enhancing student learning and conceptual understanding of electric circuits
… have many conceptual difficulties regarding electric circuits and that traditional teaching methods are not successful in overcoming these difficulties. In addressing this issue, this research project placed its primary focus on the development of research based and research validated …
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Computer aided analysis of electric circuits using state-variable techniques.
… independent sources were solved. However, test circuits containing linearly-controlled sources failed without exception when a row of the augmented matrix contained all negative elements - this gave rise to transient responses of the right shape, but grossly distorted in magnitude. Program …
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Students' conceptual modeling of simple DC electric circuits during computer-based instruction
… the development of mental models of simple DC circuits and reasoning patterns of students learning these concepts for the first time. The medium for research and instruction was a computer tutorial that allowed students to explore their ideas and beliefs as they manipulated simple materials. …
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Simulation and visualization of fields and energy flows in electric circuits with idealized geometries
… and visualize the fields and energy flows in electric circuits, using a simplified physical model based on an idealized geometry. The physical models combine and extend previously proposed models, to produce a rich array of interactive configurations of circuits. For example, both driven and …
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The effect of activity-based instructional approaches in ameliorating alternative conceptions about electric circuits held by students from the national curriculum statement and the old school curriculum
… students’ alternative conceptions about electric circuits and the effect of activity-based instructional approaches in ameliorating these alternative conceptions. The approach took into account the prior beliefs of the students. A learning sequence was developed, presenting a variety of …
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Undergraduate engineering students’ understanding of complex circuit concepts: An investigation of the intersection of students’ prior knowledge, design of learning environments and the nature of the content
… increasing students’ conceptual understanding of electric circuits discuss this concept as difficult to not only teach but for students to grasp. This difficulty has been attributed to the fact that students tend to hold inaccurate pre-conceptions of electricity which becomes problematic as the …
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A Social Realist Case Study of Knowledge and Pedagogy in the First Two Years of Electrical Engineering Education
Sound understanding in electrical engineering requires developing a complex set of linked abstract knowledge about invisible phenomena which are difficult to teach and learn. Often students do not gain abstract knowledge but rote-learn isolated facts instead; and rather than develop the capability …
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Computing and the electrical transport properties of coupled quantum networks
… applications for digital logic and computing circuits. The work specifically looks at characterizing a few main areas that would be of interest to experimentalists who are working in nanostructure devices, and is organized as a series of papers. The first paper analyzes scaling relations and …
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A novel approach for treating resistant hypertension using a controlled-pump accumulator relief device
… the circulatory system, hydraulic systems, and electric circuits. The simulation work of the proposed accumulator device idea reveals promising preliminary results. It shows an ability to significantly decrease the systolic pressure by regulating the way in which blood is pumped into the aorta …
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Electrical analogs for plate equations and their applications in mechanical vibration suppression by P.Z.T. actuators
… lot of research was carried out in order to find electric circuits the governing equations of which were analogous to the ones of mechanical systems. The mentioned circuits were called ectro-mechanical analogs. They were used as analogical computers for the simulation and the design of mechanical …
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Computer aided analysis and design of a single phase tubular induction actuator
… currents and non-linear materials with external electric circuits, involving power electronics and a moving mechanical load. The power supply can be of any kind of voltage or current waveform, such as sine wave, square wave, PWM wave or phase controlled wave. The simulated results in both steady …
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Model Order Reduction: Application to Electromagnetic Problems
… three-phase energy converter with external electric circuits is proposed and analyzed by combining all the aforementioned methods—impressively reducing the computational cost by 95%. This dissertation is genuinely geared towards the application of a priori known meth- ods on a variety of …
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Frequency-domain analysis of memoryless nonlinearities having large-signal, almost periodic excitations
… for the a.c. steady-state analysis of nonlinear electric circuits. Such techniques require that one compute the Fourier series for the response of each nonlinear circuit element, given a known excitation. Current approaches to this computation encounter difficulty when the response is almost …
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Electron acceleration in a flare plasma via coronal circuits
… to this model photospheric plasma flows build up electric potentials in the active regions in the photosphere. Usually these electric potentials are associated with electric currents closed within the photosphere. However as a result of magnetic reconnection, a magnetic connection between the …
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Through the Lenses of Pedagogical Content Knowledge and Instructor Beliefs: Understanding Engineering Instructors' Enacted Practice
… in engineering on this aspect, particularly in electrical engineering (EE) education. EE as an applied science comprises many abstract concepts among other engineering disciplines that require strategic teaching practices to facilitate student learning. The intangible nature of these concepts, …
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Modelling and analysis of electric arc loads using harmonic domain techniques
… has been reported that as much as 12% of global electricity production goes into producing artificial light using arc discharge lamps and that global annual production of these lamps may be as much as 1.2 billion units. In the liquid steel production industry, one metric tone of steel demands, on …
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Ultra-low and wide bandwidth vibrational energy harvesting using a statically balanced compliant mechanism
… on the energy conversion mechanism by piezoelectric effect in particular. The frequency gap between the majority of energy harvesting devices (with narrow bandwidth in the high frequency range) and the accessible vibrational sources (at 1-10 Hz levels) is observed and is still to be filled. …
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On the Synthesis of Passive Networks without Transformers
… a direct analogy between mechanical and electrical networks. We investigate the minimum numbers of inductors, capacitors and resistors required to synthesise a given impedance, with a particular focus on transformerless network synthesis. The conclusions of this thesis are relevant to the …
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Fault simulation for structural testing of analogue integrated circuits
In this thesis the ANTICS analogue fault simulation software is described which provides a statistical approach to fault simulation for accurate analogue IC test evaluation. The traditional figure of fault coverage is replaced by the average probability of fault detection. This is later refined by …
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