http://hdl.handle.net/1903/1661 Wed, 19 Jun 2013 16:50:52 GMT 2013-06-19T16:50:52Z http://hdl.handle.net/1903/13350 Title: Ultrafast nano-oscillators based on interlayerbridged carbon nanoscrolls Authors: Zhang, Zhao; Li, Teng Abstract: We demonstrate a viable approach to fabricating ultrafast axial nano-oscillators based on carbon nanoscrolls (CNSs) using molecular dynamics simulations. Initiated by a single-walled carbon nanotube (CNT), a monolayer graphene can continuously scroll into a CNS with the CNT housed inside. The CNT inside the CNS can oscillate along axial direction at a natural frequency of tens of gigahertz. We demonstrate an effective strategy to reduce the dissipation of the CNS-based nano-oscillator by covalently bridging the carbon layers in the CNS. We further demonstrate that such a CNS-based nano-oscillator can be excited and driven by an external AC electric field, and oscillate at more than 100 GHz. The CNS-based nano-oscillators not only offer a feasible pathway toward ultrafast nano-devices but also hold promise to enable nanoscale energy transduction, harnessing, and storage (e.g., from electric to mechanical). Mon, 25 Jul 2011 00:00:00 GMT http://hdl.handle.net/1903/13350 2011-07-25T00:00:00Z http://hdl.handle.net/1903/7488 Title: The Legacy of Taylor, Gantt, and Johnson: How to Improve Production Scheduling Authors: Herrmann, Jeffrey W. Abstract: The challenge of improving production scheduling has inspired many different approaches. This paper examines the key contributions of three individuals who improved production scheduling: Frederick Taylor, who defined the key planning functions and created a planning office; Henry Gantt, who provided useful charts to improve scheduling decision-making, and S.M. Johnson, who initiated the mathematical analysis of production scheduling problems. The paper presents an integrative strategy to improve production scheduling that synthesizes these complementary approaches. Finally, the paper discusses the soundness of this approach and its implications on OR research, education, and practice. Description: This manuscript has been accepted for publication in the International Journal of Operations and Quantitative Management. Sat, 01 Dec 2007 00:00:00 GMT http://hdl.handle.net/1903/7488 2007-12-01T00:00:00Z