The study aims to substantiate the design scheme of a linear plow with disk angle. authors have developed for smooth, furrowless plowing. proposed has disc lugs, screw housings, and guide plates. technological turnover polygonal layers formed by pre-plates, mutual arrangement housings plates, general view laboratory-field installation conducting experiments are given. During experiments, degree...

Computational fluid dynamics is implemented to investigate the influence of the wheel contact patch on the global car aerodynamics. Two main aspects of the problem are the contact step and patch shape. Three important parameters: step height, cut angle, and tire tread shape are taken into consideration. For validations of the numerical results, the experimental data are also considered. The obt...

Echinoderms with around 7,000 species can be found at all depths of the marine ecosystems. Body shape is radially symmetrical, covered by calcareous plates and five body parts are around a central axis. The class of Asteroidea (also known as starfish or sea star) is one of the most diverse groups within the phylum Echinodermata, including nearly 1900 extant species grouped into 36 families, and...

We study the dynamics of a scalar field Φ with potential g(|Φ|− η)/2 (g: self-coupling constant, η: symmetry breaking scale) after inflation and make clear whether topological defects can ever be formed during preheating. In particular, we pay attention to the GUT defects (η ∼ 10GeV − 10GeV), and consider three types of fluctuations. The first one is produced due to parametric resonance, the se...