The nanoscaled tris-͑8-hydroxyquinoline͒ aluminum (AlQ 3) crystalline film was synthesized by vapor condensation. It was stacked with nanometer-sized rods, approximately 100 nm wide and 1 m long, and had a surface roughness of about 100 nm. The vibronic progression with several separated peaks was observed in the photoluminescence spectrum at room temperature. It is attributed to the crystallinity of AlQ 3 and the coupling of vibrations of the individual ligands to the fluorescence transition. The emission current was also observed with a turn-on field of 12.0 V/m, and a current density of about 0.8 mA/cm 2 at 22 V/m. Therefore, the AlQ 3 crystalline film provides a choice for field emission.
We present a new setup of polarization modulated near-field optical microscopy for actually measuring the mesoscale crystallization of thin films. In comparison to previous transmission mode polarization near-field optical microscopy, our new collection mode microscopy provides no axial polarization, free of fiber birefringence and flexibility for tuning wavelength. The Jones matrix calculation verifies that the crystallization of the sample can be obtained by simply subtracting the polarization vector from anisotropy of the tip. The crystallization domains for thermal annealed naphthaphenylene benzidine thin films are observed by the system, stripe domains with averaged ∼15% dichroic ratios are first measured.
<p>The deep-seated landslides often caused severe hazard due to the large area and landslide mass associated with the landslide movement. Thus, monitoring the landslide movement is an important task for landslide hazard management. The Microelectromechanical Systems (MEMS) technique developed rapidly in recent years provides the ability of low-cost sensors and easy installation for monitoring of the landslide movement in field. Typically, the landslide movement monitoring using MEMS is based on the tilt angle determined from the measured ground acceleration variations in three directions, and being subjected to the signal noise. We adopt Moving Window Fast Fourier Transform and other seismic wave analysis in this study to improve resolution of the seismic signals and achieve a sound detection of deep-seated landslide movement. The MEMS was installed at the Lantai deep-seated landslide study area, which measured the ground accelerations mid-slope of the landslide. The seismic signals recorded for eleven earthquake events and three heavy rainfall events are selected for analysis. It was found that the signal frequency can be separated from the system responses and related to the landslide movement. Validations were conducted by comparing the analysis results to the field monitoring data of in-place inclinometer and borehole extensometer while available. It is suggested that the landslide movement can be identified with seismic signal at approximately 17 Hz, and the results are consistent for both earthquake-induced and rainfall-induced events.&#160;</p>
A tiled-based 3D graphics IP is designed to support OpenGL ES 1.0. The test chip runs at 139MHz and achieves 8.69 Mvertices/s and 278 Mpixels/s with its die size as 15.7 mm 2 . The IP includes embedded circuitry to monitor run time 3DG characteristics, detect bus protocol error and inefficiency, and capture bus trace at various abstraction levels with compression ratio up to 98%.
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