Báo cáo hóa học: " Department of Electrical & Computer Engineering" pptx

... coupling coefficient of coils grew with the increment of the ferro-nanofluid concentration. The presence of ferro-nanofluid increased resistance, yielding to the decrement of the quality factor, ... factor of coils of transformers with different magnetic cores. Owing to the fact that the increase of resistance is larger and faster than that of inductance with the presence of...

Ngày tải lên: 21/06/2014, 04:20

... to that of computer work but the forces involved are higher and the variability of upper limb pos- ture probably greater. A recent systematic review of the effect of interventions among computer ... relation of upper limb symp- toms to computer work, the findings are concurrent with hypotheses of external causation of work-related upper limb nerve-afflictions [6,7] includi...

Ngày tải lên: 20/06/2014, 00:20

... Korea 2 Department of Electrical Engineering and Institute for Nano Science, Korea University, Seoul 136-701, Korea 3 Department of Nanoelectronics, School of Engineering, University of Science and Technology, ... R&D Programs” of the Ministry of Education, Science and Technology, Korea. Author details 1 Electronic Materials Center, Korea Institute of Science and Techn...

Ngày tải lên: 20/06/2014, 22:20

... Access Evaluation of the diagnostic indices and clinical utility of qualitative cardiodetect ® test kit in diagnosis of ami within 12 hours of onset of chest pain in the emergency department Nik ... sensitivity of serial measurements of multiple markers nears 100%, whereas the sensitivity of a single measurement of any biomarker at the time of Figure 2 Visual interpretat...

Ngày tải lên: 20/06/2014, 23:20

... successive stages of crystallization by high- density electrical pulsing. We apply a pulsed electrical current of high current density (of the order of 10 8 to 10 9 Am -2 ) to thin ribbons of the amorphous ... using electrical pulses. The crystallization behavior of the Ti-Cu alloys under electrical pulsing should be taken into account during selection of the brazing para...

Ngày tải lên: 21/06/2014, 00:20

... has a profound impact on the conductivity. As an example of the extreme sensitivity of the con- ductivity of SiNMs to surface chemical condition, we describe in this paper t he replacement of the ... interface states trap most of the free charges. Consider, for example, a 10- nm thick crystalline sheet of Si with a nominal doping density of 10 15 cm -3 .Thesheetdensityofdopantsi...

Ngày tải lên: 21/06/2014, 03:20

... R sh of the cell is in the order of 1 MX.cm 2 . The short circuit current increases by a factor of three due to the decrease of R s . Contact and Sheet Resistances To identify the origin of the ... annealing. Other possible solutions include reduction of the barrier height and thickness of the quantum mechanical tunnelling barrier, modification of the composition of the cell’...

Ngày tải lên: 21/06/2014, 07:20

... application of glassy materials. Z. H. Khan Á N. Salah Á S. Habib Center of Nanotechnology, King Abdulaziz University, Jeddah, Saudi Arabia Z. H. Khan (&) Department of Applied Sciences & Humanities, ... SEM images of a-Ga x Se 100-x ,itisobservedthat the thin films for all the compositions of Ga (x = 3, 6, 9 & 12) contain high yield of nanorods, and their diameter is...

Ngày tải lên: 21/06/2014, 17:20

... pattern is a superposition of the patterns from two pieces of nanocrystals. Both of interplanes spacings, whose values are about 0.237 nm and lie at an angle of near to 60°, are of regular parallelogram ... Natural Science Foundation of China (Grant number of 60576023 and 60636010), the State Key Program for Basic Research of China (2004CB619004), the State Key Program for Sci...

Ngày tải lên: 22/06/2014, 00:20

... Li (&) Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, China e-mail: physchemustb@gmail.com H. Li Institute of Microstructure and Properties of Advanced ... nature of the ZnO nanowires. Inset of Fig. 1 (left) is a typical field emission scanning electron microscope (FESEM) image of the ZnO nanowires, and it shows the nanowires with d...

Ngày tải lên: 22/06/2014, 01:20