In laser manufacturing, the cutting parameters, such as power, speed, assist gas pressure, and stand off distance, have a great influence on quality of machined parts. To ensure part, process information (cutting parameters) needs to be manually assigned adjusted according different geometry characters part edges, like arc line segment. The contours are then used for generating paths, leaving b...

Abstract Knowledge of the maximum forest stand density and self-thinning process is important for understanding, modelling scheduling thinnings in silviculture. The upper trajectories stem number, N, vs mean diameter, dq or tree volume number are often used quantifying density. long debate about how site conditions modify these relationships presently revived due to global change. A crucial que...

successful development, evaluation, and qualification of propulsion systems such as turbojet and turbofan engines and rocket motors require the measurement of the performance and reliability of these systems. thrust stands or testers are instruments for solid and liquid motors test. in this paper, a method for calculating of solid motors random vibrations effects on a thrust stand structure is ...

The study presents a method for taking the heterogeneity of the stand into account in the optimisation of stand management. Heterogeneity refers to within-stand variation in stand density and/or other characteristics. A set of plots, corresponding to different sub-areas of the stand, represents the stand in calculations. Cuttings and other treatments of the plots are done simultaneously. The me...

In the black-spruce clay-belt region of Western Québec, soil nutrients are limited due to paludification. Under paludified conditions, nutrient subsidies from decomposing surface coarse woody material (CWM) may be important particularly during the later stages of ecosystem development when deadwood from senescent trees has accumulated. For soil organisms, CWM can alter microclimatic conditions ...

Continuous exposure to an aversive mixture was investigated as a means of maintaining aversion to vermeerbos in sheep subjected to the social influence of non-averted sheep. The use of an aversive mixture was based on a hypothesis that continuous exposure to an acceptable aversive mixture (containing both the aversive substance and the identification factors of vermeerbos mixed with maize meal)...