Composite pulses [1, 2, 3] play an important role in many NMR experiments, as they allow the effects of experimental imperfections, such as pulse length errors and off-resonance effects, to be reduced. In conventional NMR experiments these pulses are used to implement particular transformations on the Bloch sphere, such as inversion, and their quality can be easily assessed by determining the e...

introduction application of near-infrared absorbing nanostructures can induce hyperthermia, in addition to providing more efficient  photothermal effects. gold-gold sulfide (ggs) is considered as one of these nanostructures. this study was performed on a tissue-equivalent optical-thermal phantom to determine the temperature profile in the presence and absence of ggs and millisecond pulses of a ...

A mixed quantum-classical approach is introduced which allows the dynamical response of molecules driven far from equilibrium to be modeled. This method is applied to the interaction of molecules with intense, short-duration laser pulses. The electronic response of the molecule is described using time-dependent density functional theory (TDDFT) and the resulting Kohn-Sham equations are solved n...

Closed expressions are derived which incorporate pulse shaping effects in femtosecond nonlinear optical signals involving various combinations of temporally well-separated vibrationally resonant infrared and electronically off-resonant Raman pulses. Combinations of broadband and narrow band pulses that yield multidimensional extensions of coherent anti-Stokes Raman and sum frequency generation ...

Abstract -We estimate the availability, reliability, and mean transaction time (response time) for repairable database configurations, centralized or distributed, in which each service component is continuously available for repair. Reliability, the probability that the entire transaction can execute properly without failure, is computed as a function of mean time to failure (MTTF) and mean tim...

Short pulse generation requires a wide phase-locked spectrum. Earlier the short pulses were obtained by expanding the spectrum of a mode locked laser from self phase modulation (SPM) in an optical fiber and then compensating for group velocity dispersion (GVD) by diffraction grating and prism pairs. Pulses as short as 4.4 fs have been generated (Steinmeyer et al., 1999). For ultrafast measureme...

The design of optimum pulses for digital multicarri-er Offset-QAM (MC-OQAM) is presented. The impulses are designed as finite duration pulses with maximum signal energy in one subcarrier's frequency band. The intersymbol and intercar-rier interference is minimized. The solution is obtained by expanding the impulses into finite-length discrete prolate spheroidal sequences. The design method, opt...

We have experimentally and theoretically studied the scheme of all-optical switching based on stored light pulses. In the scheme, a probe pulse is stored in the medium by the effect of electromagnetically induced transparency and a switching pulse is applied during the storage in order to turn off the probe transmission in the retrieval process. Our study takes into account the attenuation of t...