نتایج جستجو برای: gap engineering

تعداد نتایج: 397834  

Journal: :journal of nanostructures 2012
sh. khaleghi

by means of first principles calculations we show that both rutile and anatase phases of bulk tio2 doped by s, se or pb can display substantial decreasing in the band gap (up to 50%), while doping by zr does not sizably affect the band-gap value. moreover, the absorption edge is shifted (up to 1 ev) to the lower energy range in the case of tio2 doped by s or pb that opens a way to enhancing of ...

2008
Tobias Ley Armin Ulbrich Peter Scheir Stefanie N. Lindstaedt Barbara Kump Dietrich Albert

Purpose: The paper suggests a way to support work-integrated learning for knowledge work which poses a great challenge for current research and practice. Methodology/Approach: We first suggest a Workplace Learning Context Model which has been derived by analyzing knowledge work and the knowledge sources used by knowledge workers. We then focus on the part of the context which specifies competen...

Journal: :J. Knowledge Management 2008
Tobias Ley Armin Ulbrich Peter Scheir Stefanie N. Lindstaedt Barbara Kump Dietrich Albert

Purpose – The purpose of this paper is to suggest a way to support work-integrated learning for knowledge work, which poses a great challenge for current research and practice. Design/methodology/approach – The authors first suggest a workplace learning context model, which has been derived by analyzing knowledge work and the knowledge sources used by knowledge workers. The authors then focus o...

It is common in many countries that engineers having an academic degree in Civil Engineering are appointed responsible for different tasks related to Bridge Engineering. However, there are serious questions about whether formal university courses in civil engineering could cover the needs of a bridge engineer to fulfill his or her job successfully. Regarding the recent significant advances in t...

Journal: :Solar Energy Materials and Solar Cells 2016

2009

Education and Work online at: New and unprecedented standards for mathematical and computation literacy have emerged for the nation’s workforce. Generated by the science-intensive and digitally driven global economy, today’s careers in health science, engineering, value added manufacturing, and nano-fabrication require advanced mathematics. The importance of mathematical and computational compe...

In this research, we have studied the photonic band structure, optical properties and thermal emission spectrum of 2D Silicon photonic crystal with hexagonal structure. The band structure, band gap map and the gap size versus radius have been calculated by plane wave expansion method. The maximum band gap size of TE (TM) polarization and the complete gap size are 51% (20%) and 17% at air hole r...

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