By R i c k R o n e y One logical approach to eliminating chlorofluorocarbons is to use water-soluble solder pastes. For years, elccaonic assembly houses have used aqueous cleaning for removing the water-soluble Hucs of the wave soldering operation. In fact, aqueous cleaningof assemblies bas been studied and characterized extensively. Obviously, a "drop-in" solder paste that could be cleaned in ...

The Tm,Ho:YAlO3 laser performance for two crystal orientations pumped by a wavelength tunable Ti:Sapphire laser is presented in this paper. An experimental investigation comparing a- and b-oriented Tm,Ho:YAlO3 crystals laser performance is demonstrated and discussed. Single- and multi-wavelength operations of Tm,Ho:YAlO3 lasers have been investigated in detail. The maximum output powers of 890 ...

In the TOMAS device, a triple Langmuir probe is used to measure electron temperature and density. The accuracy of this measurement depends on correct determination effective collecting area probe, which complex plasma transport processes. can be calibrated by cyclotron resonance heating experiments using cut-off density ordinary wave (O-wave). This threshold only frequency injected wave, occurr...

Context. There is abundant observational evidence of longitudinal compressive waves in plasma structures of the solar corona, which are confidently interpreted in terms of slow magnetoacoustic waves. The uses of coronal slow waves in plasma diagnostics, as well as analysis of their possible contribution to coronal heating and the solar wind acceleration require detailed theoretical modelling. A...

Using a seed layer-free hydrothermal method, ZnO nanorods (NRs) were deposited on ST-cut quartz surface acoustic wave (SAW) devices for ammonia sensing at room temperature. For a comparison, a ZnO film layer with a thickness of 30 nm was also coated onto an ST-cut quartz SAW device using a sol-gel and spin-coating technique. The ammonia sensing results showed that the sensitivity, repeatability...

All-pass digital filters are known as excellent prototype filters in many applications, such as control systems, signal processing and communications. Efficient filters can be designed because transfer function is very robust to small element changes. The drawback of digital filters based on all-pass filter sections is that they are not suitable for tuning and the design of filters with variabl...

We present the basics of two-body quantum-mechanical scattering theory and the theory of quantum resonances. The wave operators and S-matrix are constructed for smooth, compactly-supported potential perturbations of the Laplacian. The meromorphic continuation of the cut-off resolvent is proved for the same family of Schrödinger operators. Quantum resonances are defined as the poles of the merom...