Aima. To determine to what extent the problem of forward fitting visibilities measured by Spectrometer/Telescope Imaging X-rays (STIX) on-board Solar Orbiter is more challenging with respect same in case previous hard X-ray solar imaging missions; identify an effective optimization scheme for parametric STIX. Methods. This paper introduces a Particle Swarm Optimization (PSO) algorithm STIX and ...

In this paper, a new technique has been designed to capture the outline of 2D shapes using cubic B´ezier curves. The proposed technique avoids the traditional method of optimizing the global squared fitting error and emphasizes the local control of data points. A maximum error has been determined to preserve the absolute fitting error less than a criterion and it administers the process of curv...

purpose: to compare the outcomes of deep anterior lamellar keratoplasty (dalk) using the big-bubble technique with that of penetrating keratoplasty (pk) in patients with keratoconus. methods: this double-blind clinical trial included patients with moderate to advanced keratoconus and poor spectacle-corrected visual acuity or contact lens intolerance. refractive errors, best corrected visual acu...