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Full-Text Articles in Engineering
Harvesting Vibration Energy Using Nonlinear Oscillations Of An Electromagnetic Inductor, Christopher Lee, David Stamp, Nitin Kapania, José Oscar Mur-Miranda
Harvesting Vibration Energy Using Nonlinear Oscillations Of An Electromagnetic Inductor, Christopher Lee, David Stamp, Nitin Kapania, José Oscar Mur-Miranda
José Oscar Mur-Miranda
Harvesting energy from ambient vibration is a promising method for providing a continuous source of power for wireless sensor nodes. However, traditional energy harvesters are often derived from resonant linear oscillators which are capable of providing sufficient output power only if the dominant frequency of input vibrations closely matches the device resonant frequency. The limited scope of such devices has sparked an interest in the use of nonlinear oscillators as mechanisms for broadband energy harvesting. In this study, we investigate the harvesting performance of an electromagnetic harvester sustaining oscillations through the phenomena of magnetic levitation. The nonlinear behavior of the …
Harvesting Vibration Energy Using Nonlinear Oscillations Of An Electromagnetic Inductor, Christopher Lee, David Stamp, Nitin Kapania, José Oscar Mur-Miranda
Harvesting Vibration Energy Using Nonlinear Oscillations Of An Electromagnetic Inductor, Christopher Lee, David Stamp, Nitin Kapania, José Oscar Mur-Miranda
Christopher Lee
Harvesting energy from ambient vibration is a promising method for providing a continuous source of power for wireless sensor nodes. However, traditional energy harvesters are often derived from resonant linear oscillators which are capable of providing sufficient output power only if the dominant frequency of input vibrations closely matches the device resonant frequency. The limited scope of such devices has sparked an interest in the use of nonlinear oscillators as mechanisms for broadband energy harvesting. In this study, we investigate the harvesting performance of an electromagnetic harvester sustaining oscillations through the phenomena of magnetic levitation. The nonlinear behavior of the …
Enhancing Precalculus Curricula With E-Learning: Implementation And Assessment, Janet Callahan, Seung Youn Chyung, Joanna Guild, William Clement, Joe Guarino, Doug Bullock, Cheryl Schrader
Enhancing Precalculus Curricula With E-Learning: Implementation And Assessment, Janet Callahan, Seung Youn Chyung, Joanna Guild, William Clement, Joe Guarino, Doug Bullock, Cheryl Schrader
Janet M. Callahan
During Fall semester of 2007, a semester-long, quasi-experimental study was conducted at Boise State University to investigate the effectiveness of a systematically sequenced and managed, self-paced e-learning activity on improving students’ academic performance and motivation. A total of 125 students enrolled in 3 different sections of a Precalculus class participated in the study. The e-learning activity was implemented in 2 of the 3 sections as a required homework assignment. Students enrolled in one of the 2 selected sections were all engineering majors. The 3rd section was a control group that did not use the e-learning activity. A pre-test, measuring …