A series of low band gap, highly soluble alternating conjugated copolymers, comprised of 11,11,12,12-tetrahexylindenofluorene and thiophene derivatives (P1-P4), were synthesized via Pd-catalyzed Suzuki coupling reaction with very good yields. Described here are the synthesis, thermal, optical, and electrochemical properties of these new copolymers as potential new active materials for electroni...

A new method for the satellite remote sensing of different types of vegetation and ocean colour is presented. In contrast to existing algorithms relying on the strong change of the reflectivity in the red and near infrared spectral region, our method analyses weak narrow-band (few nm) reflectance structures (i.e. “fingerprint” structures) of vegetation in the red spectral range. It is based on ...

Although visible and near-infrared reflectance spectra contain absorption bands that are characteristic of the composition and structure of the absorbing species, deconvolving a complex spectrum is nontrivial. An improved approach to spectral deconvolution is presented here that accurately represents absorption bands as discrete mathematical distributions and resolves composite absorption featu...

The picosecond holographic grating generation and detection of ultrasonic waves are described. Two mechanisms, a heating mechanism and a stimulated Brillouin scattering mechanism, are described. These permit the generation of tunable ultrasonic waves in the MHz to GHz range. It is demonstrated that the two mechanisms can be distinguished by the distinct time dependences of the diffraction of a ...

This paper deals with the zero-flux attraction-repulsion chemotaxis model \begin{document}$ \begin{align} \begin{cases} u_t = \nabla \cdot \left((u+1)^{m_1-1}\nabla u - \chi u(u+1)^{m_2-1}\nabla v \right. & \text{ in } \Omega \times (0, {T_{\text{max}}}), \\ \left. \qquad \; + \xi u(u+1)^{m_3-1} w\right)+h(u) v_t \Delta f(u)v w_t w- g(u)w& \end{cases} \end{align} ~~~~(\Diamond)$\end{doc...