Introduction: Studies have shown that middle school is a decisive time for either promoting or dissuading student interest in the areas of mathematics and science (1). Students who are not engaged in learning these subjects in the critical middle school years often lose interest and motivation by the time they reach high school. Use of technology and hands-on activities has been shown to engage...

AbstraciThe following is a presentation of echo detection techniques based on time-frequency signal analysis for the measuring of thickness in thin multilayer structures. These techniques are shown to provide high-resolution signal characterization in a time-frequency space, and good noise rejection performance. In particular, the Short-Time Fourier Transform, the Gabor expansion, the Cross-Amb...

The fifth merger wave in the USA and the parallel fourth merger wave in the UK that occurred in the 1990s was characterised by a large number of acquisitions of firms operating in high technology areas such as the telecommunications, computers, the Internet, biotechnology, communications etc. These mergers accompanied and, in fact, were triggered by stunningly high market valuations of high tec...

Hailing Yang, Graduate Student, Virginia Tech, Blacksburg, VA Wei Zhang, Research Scientist, Advance and Applied Polymer Processing Institute, Institute of Advance Learning and Research, Danville, VA Ronald D, Moffitt, Director and Research Associate Professor, Advance and Applied Polymer Processing Institute, Institute of Advance Learning and Research, Danville, VA Thomas C. Ward, Professor, V...

Financial data reflects the development situation and the operating results of an enterprise. The development of hi-tech enterprises has been gaining extensive attention, the use of financial data to evaluate its integrated ability is necessary. After the selection of financial indexes to elevate this integrated ability and through a questionnaire survey of 260 hi-tech enterprises in Beijing, f...

Haoran Wei,1,2,3 Katia Rodriguez,2,4 Scott Renneckar,2,4 Weinan Leng,1,2,3 and Peter J. Vikesland1,2,3* 1Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia 2Virginia Tech Institute of Critical Technology and Applied Science (ICTAS) Sustainable Nanotechnology Center (VTSuN), Blacksburg, Virginia 3Center for the Environmental Implications of Nanotechnology (CEI...

Grado Department of Industrial and Systems Engineering, Virginia Tech, Durham Hall, Blacksburg, VA 24060, USA b System Performance Laboratory, Grado Department of Industrial and Systems Engineering, Virginia Tech, Northern Virginia Center, 7054 Haycock Road, Falls Church, VA, USA Center for Highway Asset Management Programs (CHAMPS), Via Department of Civil and Environmental Engineering, Virgin...