Nonthermal X-rays and very high-energy (VHE) γ-rays have been detected from the supernova remnant (SNR) RX J1713.7-3946, and especially the recent observations with the Suzaku satellite clearly reveal a spectral cutoff in the X-ray spectrum, which directly relates to the cutoff of the energy spectrum of the parent electrons. However, whether the origin of the VHE γ-rays from the SNR is hadronic...

NTRODUCTION In the past 100 years there has been extensive development of the mechanical cutting devices used in dentistry. However, while considerable progress has been made in this area of mechanical cutting, dental patients are still afraid of the noise and vibration produced by the mechanical action of the air turbine or ultrasonic scalers. From the end of the 20th century until now, there ...

Empirical mode decomposition (EMD) is good at analyzing nonstationary and nonlinear signals while support vector machines (SVMs) are widely used for classification. In this paper, a combination of EMD and SVM is proposed as an improved method for fusing multifocus images. Experimental results show that the proposed method is superior to the fusion methods based on à-trous wavelet transform (AWT...

Abstract Zinc peroxide (ZnO 2 ) and zinc oxide (ZnO) nanoparticles have interesting properties. Thus, they the potential to be applied as optoelectronic devices. Pulsed laser ablation in liquid (PLAL) method is one of top-down synthesis methods which several advantages, such its low cost, no need for a vacuum environment, relatively fast synthesizing nanoparticle materials. Nd-YAG with second h...

Ceramic YAG/Yb:YAG/YAG planar waveguide lasers were realized on continuous-wave and mode-locked operations. The straight waveguide, fabricated by non-aqueous tape casting and solid state reactive sintering, enabled highly efficient diode-pumped waveguide continuous-wave laser with the slope efficiency of 66% and average output power of more than 3 W. The influence of the waveguide structure on ...

We experimentally demonstrated the manipulation of 2 μm linearly polarized states in a diode-pumped YAG/Tm:YAG/YAG laser with high polarization extinction ratio of 28 dB for the very first time to the best of our knowledge. A stable linearly polarized state of 2 μm was achieved without using any specific intracavity optical polarization-selected elements. The unexpected phenomenon of tunable li...

In this paper, we describe a method to synthesize beryllium (Be) nanoparticles (NPs) by laser ablation of solid target immersed in liquid medium. Beryllium dust was successfully synthesized following the irradiation Be bulk target, which water, acetone or heavy respectively, using first and second harmonic (1064 532 nm) Nd: YAG source providing ns pulses, with repetition rate 10 Hz. The fluence...

We report the growth and characterization of Cu nanoparticles thin film of on glass substrate by pulse laser deposition method. The Cu thin film prepared with different energy 50, 60, 70, and 80 mJ. The energy effect on the morphological, structural and optical properties were studied by AFM, XRD and UV-Visible spectrophotometer. Surface topography studied by atomic force microscopy revealed na...

we report the growth and characterization of cu nanoparticles thin film of on glass substrate by pulse laser deposition method. the cu thin film prepared with different energy 50, 60, 70, and 80 mj. the energy effect on the morphological, structural and optical properties were studied by afm, xrd and uv-visible spectrophotometer. surface topography studied by atomic force microscopy revealed na...