1. Introduction Parallel excitation has been introduced as a means of accelerating multi-dimensional, spatially-selective excitation using multiple transmit coils, each driven by a unique RF pulse (1,2). In a manner analogous to parallel imaging, parallel excitation allows the use of a reduced excitation k-space trajectory (7) to achieve a desired excitation pattern, by exploiting the blurring ...

TCSPC FLIM/PLIM is based on a multi-dimensional time-correlated single-photon counting process. The sample is scanned by a high-frequency-pulsed laser beam which is additionally modulated on/off synchronously with the pixels of the scan. FLIM is obtained by building up the distribution of the photons over the scanning coordinates and the times of the photons in the excitation pulse sequence, PL...

We investigate the multiphoton resonance and multi-ion excitation in a single-mode cavity with identical vibrating ionqubits, which enables tripartite interaction among internal states of ions, mode ions' vibrational motion. Under particular resonant conditions, we derive effective Hamiltonians for three-photon three-excitation cases, respectively, find that magnitude coupling energy can be tun...

microspore culture was applied to induce embryogenesis in roses (rosa hybrida) cv. hav1. important factors affecting viability of isolated microspores and formation of multi-cellular structures including isolation media (nln, ab, b) and induction media were studied. the most responsive developmental stage of microspores (late unicellular) was determined using dapi staining. the least infection ...

today there are different vibration isolators used in industries according to the weight and excitation frequency of the machines which have vibration. one of them is air spring which is in two types: convoluted air spring and membrane air spring. convoluted air springs are used to control vibrations in low frequency (usually lower than 10 hz) and the membrane ones are used in high frequency (u...

The advantage of fractional-order derivative has attracted extensive attention in the field dynamics. In this paper, we investigated stability Mathieu equation under forced excitation, which is based on a model pantograph–catenary system. First, obtained approximate analytical expressions and periodic solutions boundaries by multi-scale method perturbation method, correctness these results were...

Parallel excitation has been introduced as a means of accelerating multidimensional, spatially-selective excitation using multiple transmit coils, each driven by a unique RF pulse. Previous approaches to RF pulse design in parallel excitation were either formulated in the frequency domain or restricted to echo-planar trajectories, or both. This paper presents an approach that is formulated as a...