In this article, we propose a general two species contest competition model subject to Allee effects and study its population dynamics to obtain insights on how the interplay of Allee effects and contest competitions affect the persistence and the extinction of two competing species. By using the monotone dynamical theory and the properties of critical curves for non-invertible maps, our analys...

We present the results of the aerosol measurements carried out over the Aegean Sea during the Photochemical Activity and Solar Ultraviolet Radiation campaign held in Greece during June 1996. Simultaneous observations performed with a lidar and a double-monochromator spectrophotometer allowed us to retrieve the optical depth, the Angström coefficient, and the backscatter-to-extinction ratio. The...

Abstract. The study of aerosol optical properties is essential to understand its impact on the global climate. In our recent field measurement carried out in Gehu area southwest Changzhou City, a photoacoustic extinctiometer (PAX) and cavity attenuated phase shift albedo monitor (CAPS-ALB) were used for online measurement. Laboratory calibration with gas particle samples correct disagreements m...

Plasmon-resonant gold nanorods are demonstrated as low backscattering albedo contrast agents for optical coherence tomography (OCT). We define the backscattering albedo, a', as the ratio of the backscattering to extinction coefficient. Contrast agents which modify a' within the host tissue phantoms are detected with greater sensitivity by the differential OCT measurement of both a' and extincti...

Application of cavity ring down (CRD) spectrometry for measuring the optical properties of pure and mixed laboratory-generated aerosols is presented. The extinction coefficient (α ext), extinction cross section (σ ext) and extinction efficiency (Q ext) were measured for polystyrene spheres (PSS), ammonium sulphate ((NH 4) 2 (SO 4)), sodium 5 chloride (NaCl), glutaric acid (GA), and Rhodamine-59...