Abstract The article presents the results of research conducted in order to improve accuracy and controllability driving along cotton row, which is an important factor increasing efficiency tractor semi-mounted harvesting machine. describes mathematical modeling movement guide wheels were obtained with help experimental tests.

Processes responsible for natural recovery of compacted forest soils are poorly understood, making estimating their problematic. Bulk density was measured over 7 years at nine boreal sites in Alberta, Canada, where harvest-only and three skidding treatments were installed (~10,000 samples). Air soil temperatures, moisture redox potential, snow depth also on the adjacent seven-cycle skid trail. ...

Harvesting for food or sport is often non-random with respect to demographic state, such as size or life stage. The population-level consequences of such selective harvesting depend upon which states are harvested and how those states contribute to population dynamics. We focused on a form of selective harvesting that has not previously been investigated in an experimental context: sex-selectiv...

The objectives in this study were to develop and test a data analysis system for calculating machine productivity from GPS-derived positional information alone. A technique was used where positions were ‘filtered’ initially to locate specific events that were independent of what actually traveled the path, then these events were combined using user-specified rules into machine functions. The sy...

A Leslie-Gower predator-prey model incorporating harvesting is studied. By constructing a suitable Lyapunov function, we show that the unique positive equilibrium of the system is globally stable, which means that suitable harvesting has no influence on the persistent property of the harvesting system. After that, detailed analysis about the influence of harvesting is carried out, and an intere...

The light-harvesting complex II (LHCII) is the main energy absorber for photosynthesis in green plants, and its translocation between photosystems I and II is the primary means of energy redistribution between them. Using single-particle tracking, we performed the first measurement of the mobility of LHCII in the photosynthetic membranes in both the nonphosphorylated and the phosphorylated (P-L...